03 - Landlines, Non-geographical Numbers
- Use of 03 area codes
- History of 03 area codes
- Cost of calling 03 numbers
- All Prefixes and Providers
- 4-digit Prefixes
Phone numbers that start with the “03” phone code are non-geographic numbers used for businesses and other organizations. They are not linked to any specific location, which makes them a more flexible alternative to area-specific landline codes like 01 or 02.
Businesses and organizations use non-geographic numbers instead of regular local landlines because they allow for some special features. Non-geographic numbers allow for flexible routing that lets calls be directed to any destination. This means that people can feel more at ease calling a local number, even though the call can be answered at a different location.
Using an 03 area code also makes it easier for organizations or businesses to advertise a single number, even if they cover multiple locations. Calls can then be forwarded to the office closest to the caller’s location, which allows them to have a more seamless customer service experience.
03 area codes are also invaluable when it comes to disaster recovery efforts. Standard, geographically based landline numbers can become unreachable in the event of a disaster that damages the telephone number in the linked area. If a number isn’t linked to a geographic location, incoming calls can be redirected to another location when needed.
Use of 03 area codes
While all 03 area code numbers function the same and cost the same, there are some sub-ranges that have restrictions on their use. 034 and 037 prefixes are reserved for migration from the equivalent 084 and 087 numbers, and 030 prefixes are only for use by public sector entities and NGOs like registered charities. There are currently twelve 03 number prefixes available.
History of 03 area codes
03 phone numbers were introduced in 2007 by telecom regulators, Ofcom. Before the introduction of 03 numbers, any company that wanted the call routing specialties listed above would have to use either a toll-free number or use a range of 08, non-geographic numbers. Not only was this expensive for the organization to run, but it was also expensive for people to call. 03 prefixes allowed companies to get the full range of calling features while not costing callers more than a normal phone call.
The convenience of this feature didn’t fully take off until 2014, when the EU's Consumer Rights Directive banned the use of expensive 084 and 087 numbers for customer service lines, with similar rules put in place for banks for the following year. This led to many companies switching over to 03 numbers during those two years.
Cost of calling 03 numbers
Any number in the UK starting with the 03 area code costs the same to call as any normal ‘01’ or ‘02’ landline number and is included in calling packages as such. It is actually a legal requirement that 03 numbers are charged at the same rates as normal landline numbers and that they cannot generate profit for the call recipient.
Typical rates for 03 numbers are about 16p per minute, with most providers charging a 23p connection charge (though this can vary). Call charges can depend on the time of day the call is placed and the call package the person has.
Prefixes and Providers
| Code | Provider | Assigned |
|---|
| Loading data… |
| 0300 000 | TelNG Limited | 26/03/2007 |
| 0300 001 | Hello Telecom (UK) Limited | 24/04/2009 |
| 0300 002 | DRD Communications Limited | 23/07/2009 |
| 0300 003 | Daisy Communications Ltd | 13/12/2010 |
| 0300 004 | TalkTalk Communications Limited | 15/10/2009 |
| 0300 005 | NBCN Networks Ltd | 07/01/2010 |
| 0300 006 | Gamma Telecom Holdings Ltd | 01/08/2019 |
| 0300 008 | Numbers Plus Ltd | 20/07/2011 |
| 0300 009 | Phone Co-Op Numbering Limited | 09/02/2012 |
| 0300 010 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0300 011 | Number Solutions Ltd | 26/03/2007 |
| 0300 012 | Windsor Telecom Ltd | 13/06/2011 |
| 0300 013 | BT | 24/01/2012 |
| 0300 014 | Liquid 11 Limited | 05/07/2011 |
| 0300 015 | Simwood eSMS Limited | 15/06/2015 |
| 0300 016 | I.T Communications Limited | 25/04/2017 |
| 0300 018 | Odigo | 23/03/2020 |
| 0300 019 | Gamma Telecom Holdings Ltd | 16/03/2020 |
| 0300 020 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0300 021 | Gamma Telecom Holdings Ltd | 26/10/2020 |
| 0300 022 | Tuxtel Ltd | 20/09/2010 |
| 0300 023 | TalkTalk Communications Limited | 12/05/2009 |
| 0300 024 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0300 025 | BT | 30/08/2013 |
| 0300 026 | Gamma Telecom Holdings Ltd | 03/02/2017 |
| 0300 027 | Gamma Telecom Holdings Ltd | 25/11/2020 |
| 0300 028 | Wavenet UK Ltd | 07/12/2010 |
| 0300 029 | Virgin Media Limited | 04/10/2007 |
| 0300 030 | TTNC Limited | 01/10/2013 |
| 0300 031 | Square Systems Limited | 06/11/2008 |
| 0300 032 | Tabsoft Limited | 12/03/2014 |
| 0300 033 | Sesui Limited | 26/03/2007 |
| 0300 034 | TelXL Ltd | 01/04/2011 |
| 0300 037 | FUSION TELECOM LTD | 14/05/2020 |
| 0300 038 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 040 | Andrews & Arnold Ltd | 06/07/2007 |
| 0300 041 | Gamma Telecom Holdings Ltd | 18/06/2021 |
| 0300 042 | Gamma Telecom Holdings Ltd | 18/06/2021 |
| 0300 043 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 044 | Tuxtel Ltd | 20/09/2010 |
| 0300 045 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0300 046 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 047 | Vodafone Ltd (C&W) | 30/06/2020 |
| 0300 048 | Vodafone Ltd (C&W) | 30/06/2020 |
| 0300 049 | Vodafone Ltd (C&W) | 30/06/2020 |
| 0300 050 | Gamma Telecom Holdings Ltd | 22/10/2021 |
| 0300 051 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 052 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 053 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 054 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 055 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 056 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 057 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 058 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 059 | Gamma Telecom Holdings Ltd | 17/12/2015 |
| 0300 060 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 061 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 062 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 063 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 064 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 065 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 066 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 067 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 068 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 069 | Lumen Technologies UK Limited | 05/06/2007 |
| 0300 070 | Swiftnet Ltd | 04/09/2007 |
| 0300 071 | Lumen Technologies UK Limited | 16/04/2019 |
| 0300 072 | Lumen Technologies UK Limited | 16/04/2019 |
| 0300 073 | Lumen Technologies UK Limited | 16/04/2019 |
| 0300 074 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 075 | Aloha Telecommunications Ltd | 26/07/2012 |
| 0300 076 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 077 | Redwood Technologies Ltd | 20/11/2018 |
| 0300 078 | Dial 9 Communications Limited | 17/05/2016 |
| 0300 079 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 080 | (AQ) LIMITED | 28/09/2012 |
| 0300 081 | Ziron Limited | 02/08/2012 |
| 0300 082 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 083 | Virgin Media Limited | 07/09/2007 |
| 0300 084 | Gamma Telecom Holdings Ltd | 26/09/2017 |
| 0300 085 | Gamma Telecom Holdings Ltd | 18/11/2016 |
| 0300 086 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 087 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 089 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 090 | 360CRM Ltd | 26/10/2011 |
| 0300 091 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 092 | Gamma Telecom Holdings Ltd | 21/10/2021 |
| 0300 095 | Internet of Things Limited | 13/07/2021 |
| 0300 099 | Windsor Telecom Ltd | 30/03/2011 |
| 0300 100 | Vodafone Ltd (Energis) | 26/03/2007 |
| 0300 101 | VoIP-Un Limited | 09/11/2007 |
| 0300 102 | Core Telecom Limited | 25/11/2011 |
| 0300 103 | Optify Mediaforce Limited | 10/07/2009 |
| 0300 104 | Lumen Technologies UK Limited | 30/07/2019 |
| 0300 105 | Lumen Technologies UK Limited | 30/07/2019 |
| 0300 106 | Lumen Technologies UK Limited | 30/07/2019 |
| 0300 110 | Voiceflex Limited | 01/08/2008 |
| 0300 111 | Admiral Telecom Limited | 11/04/2007 |
| 0300 112 | Andrews & Arnold (Numbers) Ltd | 20/05/2010 |
| 0300 118 | Subtopia Limited | 08/04/2021 |
| 0300 121 | FleXtel Limited | 26/03/2007 |
| 0300 122 | Affiniti Integrated Solutions Limited | 25/11/2008 |
| 0300 123 | BT | 26/03/2007 |
| 0300 124 | BT | 17/05/2013 |
| 0300 125 | Node4 Ltd | 30/05/2018 |
| 0300 126 | Affiniti Integrated Solutions Limited | 15/12/2008 |
| 0300 130 | Verizon UK Limited | 26/03/2007 |
| 0300 131 | Gamma Telecom Holdings Ltd | 19/03/2015 |
| 0300 133 | Atlantic Communications Corp Ltd | 18/11/2013 |
| 0300 140 | Colt Technology Services | 25/07/2018 |
| 0300 150 | TelecomIQ Limited | 13/05/2020 |
| 0300 151 | BT | 05/03/2019 |
| 0300 152 | BT | 05/03/2019 |
| 0300 153 | BT | 05/03/2019 |
| 0300 154 | BT | 05/03/2019 |
| 0300 155 | BT | 05/03/2019 |
| 0300 156 | BT | 05/03/2019 |
| 0300 157 | BT | 05/03/2019 |
| 0300 158 | BT | 05/03/2019 |
| 0300 159 | BT | 05/03/2019 |
| 0300 160 | BT | 05/03/2019 |
| 0300 161 | BT | 05/03/2019 |
| 0300 162 | BT | 05/03/2019 |
| 0300 163 | BT | 05/03/2019 |
| 0300 164 | BT | 05/03/2019 |
| 0300 165 | BT | 05/03/2019 |
| 0300 166 | BT | 05/03/2019 |
| 0300 167 | BT | 05/03/2019 |
| 0300 168 | BT | 05/03/2019 |
| 0300 169 | BT | 05/03/2019 |
| 0300 170 | BT | 05/03/2019 |
| 0300 199 | Telecoms World Direct Ltd | 11/01/2011 |
| 0300 200 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0300 201 | Citrus Telecommunications Ltd | 09/07/2007 |
| 0300 202 | Affiniti Integrated Solutions Limited | 29/08/2013 |
| 0300 215 | Lumen Technologies UK Limited | 03/06/2010 |
| 0300 220 | Group 3 Technology Limited | 14/04/2011 |
| 0300 222 | KCOM Group Limited | 26/03/2007 |
| 0300 234 | Talk Numbers Ltd | 08/06/2010 |
| 0300 244 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0300 246 | Voicetec Systems Ltd | 13/09/2011 |
| 0300 247 | Redcentric Solutions Limited | 26/05/2016 |
| 0300 263 | Virgin Media Limited | 18/09/2007 |
| 0300 300 | Virgin Media Limited | 26/03/2007 |
| 0300 301 | Solutios Limited | 06/10/2008 |
| 0300 302 | Inet Telecoms Ltd (Voipfone) | 12/07/2012 |
| 0300 303 | Gamma Telecom Holdings Ltd | 26/03/2007 |
| 0300 304 | Gamma Telecom Holdings Ltd | 28/05/2012 |
| 0300 311 | Commi Holdings Limited | 17/11/2016 |
| 0300 313 | Intrado Cloud Solutions Limited | 03/06/2009 |
| 0300 321 | Vodafone Ltd (C&W) | 18/06/2013 |
| 0300 322 | Affiniti Integrated Solutions Limited | 19/06/2014 |
| 0300 323 | Invosys Limited | 10/07/2012 |
| 0300 324 | 24 Seven Communications Ltd | 16/06/2009 |
| 0300 330 | Affiniti Integrated Solutions Limited | 26/03/2007 |
| 0300 332 | TalkTalk Communications Limited | 02/03/2010 |
| 0300 333 | TalkTalk Communications Limited | 26/03/2007 |
| 0300 334 | QX Telecom Ltd | 20/06/2007 |
| 0300 339 | London Central Communications Ltd | 12/08/2009 |
| 0300 343 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0300 344 | IM Software Ltd | 28/05/2009 |
| 0300 345 | TalkTalk Communications Limited | 01/05/2014 |
| 0300 365 | Telecoms World PLC | 18/12/2007 |
| 0300 369 | BT | 29/08/2013 |
| 0300 370 | Zestel Limited | 19/02/2013 |
| 0300 373 | Gamma Telecom Holdings Ltd | 24/11/2017 |
| 0300 400 | AQL Wholesale Ltd | 26/03/2007 |
| 0300 404 | Nexbridge Communications Limited | 09/01/2012 |
| 0300 414 | Nexus Telecommunications Limited | 26/02/2013 |
| 0300 421 0 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 1 | Virgin Media Limited | 07/04/2016 |
| 0300 421 2 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 3 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 4 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 5 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 6 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 7 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 8 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 421 9 | Gamma Telecom Holdings Ltd | 02/03/2021 |
| 0300 422 | Gamma Telecom Holdings Ltd | 11/12/2020 |
| 0300 423 | Virgin Media Limited | 07/04/2016 |
| 0300 435 | IPV6 Limited | 20/01/2009 |
| 0300 444 | Reality Network Services Limited | 26/03/2007 |
| 0300 455 | TalkTalk Communications Limited | 01/05/2014 |
| 0300 456 | TalkTalk Communications Limited | 07/11/2013 |
| 0300 458 | TalkTalk Communications Limited | 01/05/2014 |
| 0300 466 | Dynamic Mobile Billing Limited | 29/07/2009 |
| 0300 470 | BT | 13/12/2013 |
| 0300 482 | Syntec Limited | 17/06/2016 |
| 0300 500 | TalkTalk Communications Limited | 14/10/2013 |
| 0300 505 | Sigma Voice Solutions Ltd | 14/05/2014 |
| 0300 555 | Virgin Media Limited | 07/04/2016 |
| 0300 561 | VoiceHost Limited | 28/07/2011 |
| 0300 567 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0300 600 | GCI Network Solutions Ltd | 20/04/2017 |
| 0300 613 | Gamma Telecom Holdings Ltd | 03/12/2020 |
| 0300 614 | Gamma Telecom Holdings Ltd | 03/12/2020 |
| 0300 615 | Gamma Telecom Holdings Ltd | 03/12/2020 |
| 0300 636 | Spitfire Network Services Limited | 15/01/2009 |
| 0300 654 | BT | 28/08/2013 |
| 0300 660 | Number Services Ltd. | 22/11/2018 |
| 0300 666 | Floren Limited | 14/11/2014 |
| 0300 678 | Syntec Limited | 30/03/2009 |
| 0300 688 | Invade International Ltd | 13/01/2016 |
| 0300 748 | TalkTalk Communications Limited | 01/05/2014 |
| 0300 770 | Planet Numbers Ltd | 09/09/2014 |
| 0300 772 | Kalnet4U Ltd | 25/11/2011 |
| 0300 777 | Windsor Telecom Ltd | 26/06/2008 |
| 0300 789 | TalkTalk Communications Limited | 01/05/2014 |
| 0300 790 | BT | 20/08/2007 |
| 0300 800 | Net-Work Internet Ltd | 24/09/2007 |
| 0300 808 | Alphatalk Limited | 25/03/2009 |
| 0300 888 | Barritel Limited | 26/03/2007 |
| 0300 898 | XoverX Ltd | 09/05/2013 |
| 0300 900 | Plus Telecom Limited | 26/03/2007 |
| 0300 974 | Lumen Technologies UK Limited | 20/01/2009 |
| 0300 987 | TalkTalk Communications Limited | 01/05/2014 |
| 0300 998 | Cloud Telecom Ltd | 07/02/2012 |
| 0300 999 | Windsor Telecom Ltd | 13/06/2011 |
| 0303 003 | Gamma Telecom Holdings Ltd | 12/04/2007 |
| 0303 010 | One Network Limited | 17/05/2011 |
| 0303 020 | TelXL Ltd | 20/04/2007 |
| 0303 030 | Digital Space Group Limited | 29/02/2016 |
| 0303 031 | Telecom2 Limited | 24/08/2009 |
| 0303 033 | Nextec UK Limited | 26/11/2013 |
| 0303 040 | Magrathea Telecommunications Limited | 26/03/2007 |
| 0303 050 | Served Up Limited | 20/10/2008 |
| 0303 060 | Accounts Centre Limited | 16/07/2010 |
| 0303 080 | Colt Technology Services | 17/08/2021 |
| 0303 081 | Colt Technology Services | 17/08/2021 |
| 0303 082 | Colt Technology Services | 17/08/2021 |
| 0303 083 | Colt Technology Services | 17/08/2021 |
| 0303 100 | I-NET COMMUNICATIONS GROUP PLC | 21/07/2008 |
| 0303 123 | BT | 11/04/2007 |
| 0303 131 | Mintaka Limited | 30/12/2013 |
| 0303 141 | Atomstream Limited | 22/04/2010 |
| 0303 201 | TeleSurf Limited | 07/04/2010 |
| 0303 222 | Telecoms World Direct Ltd | 11/01/2011 |
| 0303 223 | Fuse 2 Communications Ltd | 16/10/2020 |
| 0303 232 | Business Broadcast Communications Limited | 16/10/2009 |
| 0303 300 | Nexus Telecommunications Limited | 30/12/2008 |
| 0303 303 | Windsor Telecom Ltd | 26/03/2007 |
| 0303 313 | Colt Technology Services | 26/03/2007 |
| 0303 330 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0303 333 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0303 334 | Storacall Technology Limited | 19/11/2009 |
| 0303 335 | Internet of Things Limited | 13/07/2021 |
| 0303 344 | Suretec Systems Ltd | 28/05/2010 |
| 0303 366 | GCI Network Solutions Ltd | 20/04/2017 |
| 0303 444 | Gamma Telecom Holdings Ltd | 05/06/2009 |
| 0303 445 | Gamma Telecom Holdings Ltd | 05/06/2009 |
| 0303 456 | BT | 15/02/2016 |
| 0303 555 | Telecoms World Direct Ltd | 25/06/2014 |
| 0303 666 | GCI Network Solutions Ltd | 20/04/2017 |
| 0303 770 | Content Guru Limited | 02/11/2007 |
| 0303 888 | Telecoms World PLC | 03/11/2009 |
| 0303 999 | Windsor Telecom Ltd | 17/10/2012 |
| 0306 464 | TelecomIQ Limited | 09/09/2013 |
| 0306 565 | Nodemax Limited | 08/07/2008 |
| 0306 770 | Resilient PLC | 20/03/2007 |
| 0306 771 | Resilient PLC | 20/03/2007 |
| 0306 772 | Resilient PLC | 20/03/2007 |
| 0306 773 | Resilient PLC | 20/03/2007 |
| 0306 774 | Resilient PLC | 20/03/2007 |
| 0306 775 | Resilient PLC | 20/03/2007 |
| 0306 776 | Resilient PLC | 20/03/2007 |
| 0306 777 | Resilient PLC | 20/03/2007 |
| 0306 778 | Resilient PLC | 20/03/2007 |
| 0306 779 | Resilient PLC | 20/03/2007 |
| 0306 780 | Resilient PLC | 20/03/2007 |
| 0306 781 | Resilient PLC | 20/03/2007 |
| 0306 782 | Resilient PLC | 20/03/2007 |
| 0306 783 | Resilient PLC | 20/03/2007 |
| 0306 784 | Resilient PLC | 20/03/2007 |
| 0306 785 | Resilient PLC | 20/03/2007 |
| 0306 786 | Resilient PLC | 20/03/2007 |
| 0306 787 | Resilient PLC | 20/03/2007 |
| 0306 788 | Resilient PLC | 20/03/2007 |
| 0306 789 | Resilient PLC | 20/03/2007 |
| 0306 790 | Resilient PLC | 20/03/2007 |
| 0306 791 | Resilient PLC | 20/03/2007 |
| 0306 792 | Resilient PLC | 20/03/2007 |
| 0306 793 | Resilient PLC | 20/03/2007 |
| 0306 794 | Resilient PLC | 20/03/2007 |
| 0306 795 | Resilient PLC | 20/03/2007 |
| 0306 796 | Resilient PLC | 20/03/2007 |
| 0306 797 | Resilient PLC | 20/03/2007 |
| 0306 798 | Resilient PLC | 20/03/2007 |
| 0306 799 | Resilient PLC | 20/03/2007 |
| 0306 800 | iHub 2 Limited | 20/06/2016 |
| 0330 001 | WAVECREST NETWORKS LIMITED | 16/12/2019 |
| 0330 002 | DRD Communications Limited | 23/07/2009 |
| 0330 003 | Atlantic Communications Corp Ltd | 18/11/2013 |
| 0330 004 | Hello Telecom (UK) Limited | 24/04/2009 |
| 0330 005 | Odyssey Systems Ltd | 15/06/2010 |
| 0330 006 | Retail Technology Services Ltd | 06/11/2008 |
| 0330 008 | Node4 Ltd | 27/09/2010 |
| 0330 009 | One Network Limited | 17/05/2011 |
| 0330 010 | Numbergroup Utilities Ltd | 19/10/2010 |
| 0330 011 | Rojo Trading Limited | 19/04/2007 |
| 0330 012 | Calltracks Limited | 03/02/2014 |
| 0330 013 | TalkTalk Communications Limited | 14/02/2013 |
| 0330 014 | BT | 30/08/2013 |
| 0330 015 | Cloud9 Communications Limited | 21/11/2012 |
| 0330 016 | Tipicall Limited | 31/10/2013 |
| 0330 017 | Calltracks Limited | 14/05/2014 |
| 0330 018 | Vodafone Ltd (Energis) | 18/12/2014 |
| 0330 019 | Calltracks Limited | 06/01/2015 |
| 0330 020 | Citrus Telecommunications Ltd | 06/07/2007 |
| 0330 021 | Gamma Telecom Holdings Ltd | 30/03/2015 |
| 0330 022 | TelXL Ltd | 20/04/2007 |
| 0330 023 | Internexus Networks Limited | 18/04/2013 |
| 0330 024 | Gamma Telecom Holdings Ltd | 19/11/2014 |
| 0330 025 | I.T Communications Limited | 09/03/2015 |
| 0330 026 | Wavenet UK Ltd | 08/10/2010 |
| 0330 027 | DIDWW Ireland Limited | 07/04/2014 |
| 0330 028 | Alnitak GmbH | 18/02/2015 |
| 0330 029 | Infinity Tracking Ltd | 29/04/2019 |
| 0330 030 | Talk Numbers Ltd | 31/01/2012 |
| 0330 031 | Gamma Telecom Holdings Ltd | 30/03/2015 |
| 0330 032 | Fido Telecom Limited | 19/05/2015 |
| 0330 033 | TelNG Limited | 26/03/2007 |
| 0330 034 | Syntec Limited | 20/06/2012 |
| 0330 035 | Jtec UK Limited | 02/06/2015 |
| 0330 036 | Gamma Telecom Holdings Ltd | 24/11/2017 |
| 0330 037 | Affiniti Integrated Solutions Limited | 07/05/2015 |
| 0330 038 | IOVOX Limited | 15/04/2014 |
| 0330 040 | Barritel Limited | 17/10/2013 |
| 0330 041 | Vodafone Ltd (C&W) | 12/08/2015 |
| 0330 042 | Calltracks Limited | 11/09/2015 |
| 0330 043 | YayYay Limited | 07/04/2015 |
| 0330 045 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0330 046 | Vodafone Ltd (C&W) | 24/04/2015 |
| 0330 047 | Vodafone Ltd (C&W) | 24/04/2015 |
| 0330 048 | Vodafone Ltd (C&W) | 24/04/2015 |
| 0330 049 | Vodafone Ltd (C&W) | 24/04/2015 |
| 0330 050 | Alphatalk Limited | 14/10/2009 |
| 0330 051 | Stour Marine Limited | 11/07/2014 |
| 0330 052 | Cloudcall Limited | 20/11/2015 |
| 0330 053 | Gamma Telecom Holdings Ltd | 13/06/2016 |
| 0330 054 | Belgacom International Carrier Services SA | 20/06/2016 |
| 0330 055 | Voiceflex Limited | 24/07/2007 |
| 0330 056 | Voiceflex Limited | 28/10/2015 |
| 0330 057 | Magrathea Telecommunications Limited | 29/07/2016 |
| 0330 058 | Gamma Telecom Holdings Ltd | 02/08/2016 |
| 0330 059 | TAP GATEWAY LTD | 02/07/2020 |
| 0330 060 | Lumen Technologies UK Limited | 26/01/2009 |
| 0330 061 | HulloMail Limited | 18/06/2009 |
| 0330 062 | HulloMail Limited | 16/02/2010 |
| 0330 063 | HulloMail Limited | 16/02/2010 |
| 0330 064 | HulloMail Limited | 16/02/2010 |
| 0330 065 | HulloMail Limited | 16/02/2010 |
| 0330 066 | Real Time Telecoms Ltd | 18/08/2014 |
| 0330 067 | HulloMail Limited | 16/02/2010 |
| 0330 068 | HulloMail Limited | 16/02/2010 |
| 0330 069 | HulloMail Limited | 16/02/2010 |
| 0330 070 | HulloMail Limited | 16/02/2010 |
| 0330 071 | HulloMail Limited | 16/02/2010 |
| 0330 072 | HulloMail Limited | 16/02/2010 |
| 0330 073 | HulloMail Limited | 16/02/2010 |
| 0330 074 | HulloMail Limited | 16/02/2010 |
| 0330 075 | HulloMail Limited | 16/02/2010 |
| 0330 076 | HulloMail Limited | 16/02/2010 |
| 0330 077 | Invade International Ltd | 13/01/2016 |
| 0330 078 | HulloMail Limited | 16/02/2010 |
| 0330 079 | HulloMail Limited | 28/01/2013 |
| 0330 080 | (AQ) LIMITED | 28/09/2012 |
| 0330 081 | (AQ) LIMITED | 28/09/2012 |
| 0330 082 | HulloMail Limited | 28/01/2013 |
| 0330 083 | HulloMail Limited | 28/01/2013 |
| 0330 084 | HulloMail Limited | 28/01/2013 |
| 0330 085 | HulloMail Limited | 28/01/2013 |
| 0330 086 | HulloMail Limited | 28/01/2013 |
| 0330 087 | HulloMail Limited | 28/01/2013 |
| 0330 088 | Magrathea Telecommunications Limited | 26/03/2007 |
| 0330 089 | IP Phone Solutions Ltd | 07/10/2013 |
| 0330 090 | Minotaur Telecom Limited | 31/01/2013 |
| 0330 091 | HulloMail Limited | 28/01/2013 |
| 0330 092 | HulloMail Limited | 28/01/2013 |
| 0330 093 | HulloMail Limited | 28/01/2013 |
| 0330 094 | Gamma Telecom Holdings Ltd | 10/10/2016 |
| 0330 095 | Lumen Technologies UK Limited | 31/10/2016 |
| 0330 096 | Calltracks Limited | 24/11/2016 |
| 0330 097 | Callitech Limited | 27/03/2017 |
| 0330 098 | IOVOX Limited | 31/01/2017 |
| 0330 099 | Sigma Voice Solutions Ltd | 31/12/2007 |
| 0330 100 | Vodafone Ltd (Energis) | 26/03/2007 |
| 0330 101 | Content Guru Limited | 02/11/2007 |
| 0330 102 | Vodafone Ltd (Energis) | 22/03/2011 |
| 0330 103 | Digital Select Limited | 27/02/2013 |
| 0330 104 | Talk.to FZC | 24/02/2014 |
| 0330 105 | Pure-IP Limited | 24/03/2014 |
| 0330 106 | Node4 Ltd | 07/02/2017 |
| 0330 107 | Invosys Limited | 04/04/2017 |
| 0330 108 | Calltracks Limited | 20/04/2017 |
| 0330 109 | Lumen Technologies UK Limited | 25/04/2017 |
| 0330 110 | Chess Limited | 06/04/2018 |
| 0330 111 | Core Telecom Limited | 03/05/2012 |
| 0330 113 | Vonage Limited | 20/01/2015 |
| 0330 114 | Supported Business Limited | 21/06/2016 |
| 0330 116 | Syntec Limited | 27/01/2015 |
| 0330 117 | Localphone Limited | 15/12/2015 |
| 0330 118 | TelcoSwitch Limited | 29/02/2016 |
| 0330 119 | iHub 2 Limited | 20/06/2016 |
| 0330 120 | Sipcentric Ltd | 23/06/2014 |
| 0330 121 | Fluency Communications Ltd | 23/09/2013 |
| 0330 122 | Simwood eSMS Limited | 20/07/2010 |
| 0330 123 | BT | 26/03/2007 |
| 0330 124 | BT | 22/01/2013 |
| 0330 125 | Alnitak GmbH | 07/12/2015 |
| 0330 126 | Square 1 Communications Limited | 02/09/2014 |
| 0330 127 | Magrathea Telecommunications Limited | 19/05/2017 |
| 0330 128 | Gamma Telecom Holdings Ltd | 10/07/2017 |
| 0330 129 | Voiceflex Limited | 16/11/2017 |
| 0330 130 | I-NET COMMUNICATIONS GROUP PLC | 11/07/2012 |
| 0330 131 | PCI-PAL (UK) Limited | 07/02/2017 |
| 0330 132 | Lycatel (Ireland) Limited | 22/08/2013 |
| 0330 133 | Buzz Networks Limited | 06/02/2012 |
| 0330 134 | Affiniti Integrated Solutions Limited | 26/06/2014 |
| 0330 135 | Gamma Telecom Holdings Ltd | 07/02/2018 |
| 0330 137 | Voiceflex Limited | 19/10/2018 |
| 0330 138 | Lumen Technologies UK Limited | 22/10/2018 |
| 0330 139 | Public Internet Limited | 26/04/2019 |
| 0330 150 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0330 151 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0330 152 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0330 153 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0330 154 | Vodafone Ltd (C&W) | 12/06/2014 |
| 0330 155 | Vodafone Ltd (C&W) | 12/06/2014 |
| 0330 156 | Vodafone Ltd (C&W) | 12/06/2014 |
| 0330 157 | Vodafone Ltd (C&W) | 12/06/2014 |
| 0330 158 | Vodafone Ltd (C&W) | 12/06/2014 |
| 0330 159 | Vodafone Ltd (C&W) | 12/06/2014 |
| 0330 160 | Syntec Limited | 04/11/2011 |
| 0330 161 | Lumen Technologies UK Limited | 20/03/2014 |
| 0330 162 | Infinity Tracking Ltd | 20/11/2018 |
| 0330 163 | Odigo | 23/03/2020 |
| 0330 164 | Firstcom Europe UK Limited | 02/06/2020 |
| 0330 165 | Gamma Telecom Holdings Ltd | 16/12/2020 |
| 0330 166 | Odyssey Systems Ltd | 01/09/2011 |
| 0330 170 | Tango Networks UK Ltd | 24/03/2016 |
| 0330 171 | Telecom 10 Ltd | 28/01/2019 |
| 0330 173 | Infinity Tracking Ltd | 29/04/2019 |
| 0330 174 | BT | 17/05/2019 |
| 0330 175 | Gamma Telecom Holdings Ltd | 25/02/2021 |
| 0330 176 | TRUESPEED COMMUNICATIONS LTD | 21/05/2019 |
| 0330 177 | Axe Telecom Limited | 26/02/2018 |
| 0330 178 | Calltracks Limited | 26/03/2019 |
| 0330 179 | Magrathea Telecommunications Limited | 19/04/2021 |
| 0330 180 | (AQ) LIMITED | 09/10/2012 |
| 0330 190 | TELNYX UK LIMITED | 28/04/2020 |
| 0330 191 | Media Hawk Ltd | 08/07/2020 |
| 0330 200 | Digital Space Group Limited | 12/04/2016 |
| 0330 201 | TeleSurf Limited | 07/04/2010 |
| 0330 202 | VoIP-Un Limited | 09/11/2007 |
| 0330 205 | NBCN Networks Ltd | 07/01/2010 |
| 0330 210 | I-NET COMMUNICATIONS GROUP PLC | 22/05/2014 |
| 0330 211 | UK BANDWIDTH LIMITED | 02/09/2019 |
| 0330 220 | Net-Work Internet Ltd | 24/09/2007 |
| 0330 221 | Gamma Telecom Holdings Ltd | 28/05/2012 |
| 0330 222 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0330 223 | Inet Telecoms Ltd (Voipfone) | 12/07/2012 |
| 0330 227 | SONA BUSINESS PVT. LTD. | 12/08/2021 |
| 0330 229 | Dial 9 Communications Limited | 12/05/2016 |
| 0330 230 | FUSION TELECOM LTD | 14/05/2020 |
| 0330 232 | Zapappi Ltd | 25/08/2017 |
| 0330 233 | 360CRM Ltd | 02/07/2012 |
| 0330 234 | Ghost Telecom Limited | 30/04/2012 |
| 0330 236 | Via-Vox Limited | 21/11/2017 |
| 0330 250 | TelecomIQ Limited | 13/05/2020 |
| 0330 266 | Spacetel UK Ltd | 29/09/2011 |
| 0330 300 | Digital Space Group Limited | 29/02/2016 |
| 0330 301 | ICUK Computing Services Limited | 08/07/2019 |
| 0330 302 | Numbers Telecom Limited | 31/03/2016 |
| 0330 303 | Virgin Media Limited | 07/04/2016 |
| 0330 304 | Adepteo Limited | 27/02/2015 |
| 0330 310 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0330 311 | Affiniti Integrated Solutions Limited | 07/05/2015 |
| 0330 313 | GCI Network Solutions Ltd | 30/03/2017 |
| 0330 314 | Affiniti Integrated Solutions Limited | 30/06/2020 |
| 0330 320 | Ziron Limited | 07/08/2012 |
| 0330 321 | FleXtel Limited | 26/03/2007 |
| 0330 323 | Need More Time Ltd | 17/07/2007 |
| 0330 324 | Orbital Net Limited | 17/06/2015 |
| 0330 325 | Aloha Telecommunications Ltd | 05/08/2015 |
| 0330 330 | Vodafone Ltd (C&W) | 18/06/2013 |
| 0330 331 | Syntec Limited | 30/03/2009 |
| 0330 332 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0330 333 | Affiniti Integrated Solutions Limited | 26/03/2007 |
| 0330 334 | Vodafone Ltd (C&W) | 18/06/2013 |
| 0330 335 | Cloudcall Limited | 16/06/2011 |
| 0330 336 | Via-Vox Limited | 11/12/2009 |
| 0330 337 | Teledesign Solutions Limited | 03/07/2012 |
| 0330 340 | TelXL Ltd | 24/07/2009 |
| 0330 341 | AQL Wholesale Ltd | 18/11/2019 |
| 0330 343 | Virgin Media Limited | 07/04/2016 |
| 0330 344 | Voicetec Systems Ltd | 13/09/2011 |
| 0330 345 | TGL Services (UK) Ltd | 02/02/2015 |
| 0330 350 | Aloha Telecommunications Ltd | 04/08/2011 |
| 0330 353 | Inclarity Communications Limited | 02/01/2013 |
| 0330 354 | Numbergroup Utilities Ltd | 10/02/2021 |
| 0330 355 | Phone Co-Op Numbering Limited | 25/11/2010 |
| 0330 360 | Aloha Telecommunications Ltd | 06/08/2012 |
| 0330 363 | Spitfire Network Services Limited | 15/01/2009 |
| 0330 365 | Daotec Ltd | 10/06/2021 |
| 0330 370 | Zestel Limited | 19/02/2013 |
| 0330 372 | EE Limited (Orange) | 10/06/2008 |
| 0330 373 | EE Limited (Orange) | 10/06/2008 |
| 0330 374 | EE Limited (Orange) | 10/06/2008 |
| 0330 375 | EE Limited (Orange) | 10/06/2008 |
| 0330 376 | EE Limited (Orange) | 10/06/2008 |
| 0330 377 | 24 Seven Communications Ltd | 16/06/2009 |
| 0330 378 | Digitech Solutions Global Limited | 19/05/2011 |
| 0330 380 | Telappliant Ltd | 04/03/2014 |
| 0330 383 | NFON UK Ltd | 13/04/2018 |
| 0330 390 | Colt Technology Services | 05/11/2015 |
| 0330 398 | Square Systems Limited | 24/06/2014 |
| 0330 400 | I-NET COMMUNICATIONS GROUP PLC | 21/07/2008 |
| 0330 403 | Foehn Limited | 13/01/2015 |
| 0330 404 | Media Hawk Ltd | 21/09/2011 |
| 0330 414 | GCI Network Solutions Ltd | 30/03/2017 |
| 0330 424 | M247 Ltd | 29/04/2015 |
| 0330 430 | York Data Services Limited | 17/07/2012 |
| 0330 432 | Tismi BV | 13/07/2018 |
| 0330 433 | Affiniti Integrated Solutions Limited | 01/12/2017 |
| 0330 440 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0330 441 | Voiceflex Limited | 11/08/2008 |
| 0330 444 | Citrus Telecommunications Ltd | 19/09/2019 |
| 0330 445 | Suretec Systems Ltd | 28/05/2010 |
| 0330 450 | Telemix Limited | 26/02/2015 |
| 0330 454 | Square Systems Limited | 24/06/2014 |
| 0330 456 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0330 460 | Colt Technology Services | 25/07/2018 |
| 0330 470 | Callitech Limited | 22/04/2021 |
| 0330 500 | Served Up Limited | 20/10/2008 |
| 0330 501 | Served Up Limited | 16/06/2015 |
| 0330 505 | Square Systems Limited | 06/11/2008 |
| 0330 511 | I-NET COMMUNICATIONS GROUP PLC | 28/10/2016 |
| 0330 520 | Simwood eSMS Limited | 31/08/2017 |
| 0330 550 | Atomstream Limited | 22/04/2010 |
| 0330 551 | Colt Technology Services | 23/02/2018 |
| 0330 555 | Windsor Telecom Ltd | 17/10/2012 |
| 0330 567 | Citrus Telecommunications Ltd | 23/06/2015 |
| 0330 580 | SiPalto Ltd | 26/06/2020 |
| 0330 587 | Orange Business Holdings UK Limited | 26/02/2013 |
| 0330 588 | Orange Business Holdings UK Limited | 23/04/2015 |
| 0330 600 | Group 3 Technology Limited | 14/04/2011 |
| 0330 606 | Citrus Telecommunications Ltd | 19/12/2011 |
| 0330 633 | Telecoms World Direct Ltd | 25/06/2014 |
| 0330 635 | Alphatalk Limited | 30/01/2014 |
| 0330 654 | BT | 18/11/2014 |
| 0330 660 | Nexus Telecommunications Limited | 30/12/2008 |
| 0330 666 | Tuxtel Ltd | 05/11/2009 |
| 0330 670 | BT | 17/09/2013 |
| 0330 678 | BT | 10/10/2016 |
| 0330 684 | OVH Limited | 26/06/2008 |
| 0330 686 | UK BROADBAND LIMITED | 05/12/2013 |
| 0330 700 | Swiftnet Ltd | 04/09/2007 |
| 0330 707 | InTouch Communication Services Limited | 17/07/2012 |
| 0330 726 | TeleWare Group PLC | 20/02/2013 |
| 0330 730 | Tango Networks UK Ltd | 09/03/2020 |
| 0330 773 | PEERLESS NETWORK UK LIMITED | 14/07/2020 |
| 0330 777 | Eircom (UK) Limited | 26/06/2007 |
| 0330 800 | Global Reach Networks Limited | 24/08/2016 |
| 0330 808 | Voxbone SA | 04/01/2008 |
| 0330 818 | Voxbone SA | 24/03/2011 |
| 0330 822 | Voxbone SA | 11/01/2013 |
| 0330 828 | Voxbone SA | 27/09/2011 |
| 0330 838 | Affiniti Integrated Solutions Limited | 27/10/2015 |
| 0330 852 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 853 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 854 | Lumen Technologies UK Limited | 16/06/2021 |
| 0330 855 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 856 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 857 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 858 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 859 | Network Rail Infrastructure Limited | 04/09/2014 |
| 0330 880 | Mi Telecom Limited | 11/04/2014 |
| 0330 888 | Connect Telecom UK Limited | 11/07/2007 |
| 0330 900 | Windsor Telecom Ltd | 13/06/2011 |
| 0330 912 | Gamma Telecom Holdings Ltd | 04/09/2018 |
| 0330 977 | Twelve Telecom Limited | 25/04/2013 |
| 0330 990 | TelecomIQ Limited | 09/09/2013 |
| 0330 993 | Nowtel Wholesale Limited | 21/02/2013 |
| 0330 995 | Metronet (UK) Limited | 24/10/2014 |
| 0330 998 | Citrus Telecommunications Ltd | 08/11/2013 |
| 0330 999 | Number Solutions Ltd | 11/04/2007 |
| 0331 143 | BT | 15/10/2014 |
| 0331 144 | BT | 15/10/2014 |
| 0331 145 | BT | 15/10/2014 |
| 0331 146 | BT | 15/10/2014 |
| 0331 147 | BT | 15/10/2014 |
| 0331 148 | BT | 15/10/2014 |
| 0331 600 | BT | 12/12/2011 |
| 0331 601 | BT | 12/12/2011 |
| 0331 602 | BT | 12/12/2011 |
| 0331 603 | BT | 12/12/2011 |
| 0331 604 | BT | 12/12/2011 |
| 0331 605 | BT | 12/12/2011 |
| 0331 606 | BT | 12/12/2011 |
| 0331 607 | BT | 12/12/2011 |
| 0331 608 | BT | 12/12/2011 |
| 0331 609 | BT | 12/12/2011 |
| 0331 610 | BT | 12/12/2011 |
| 0331 611 | BT | 12/12/2011 |
| 0331 612 | BT | 12/12/2011 |
| 0331 613 | BT | 12/12/2011 |
| 0331 614 | BT | 12/12/2011 |
| 0331 615 | BT | 12/12/2011 |
| 0331 616 | BT | 12/12/2011 |
| 0331 617 | BT | 12/12/2011 |
| 0331 618 | BT | 12/12/2011 |
| 0331 619 | BT | 12/12/2011 |
| 0331 620 | BT | 12/12/2011 |
| 0331 621 | BT | 12/12/2011 |
| 0331 622 | BT | 12/12/2011 |
| 0331 623 | BT | 12/12/2011 |
| 0331 624 | BT | 12/12/2011 |
| 0331 625 | BT | 12/12/2011 |
| 0331 626 | BT | 12/12/2011 |
| 0331 627 | BT | 12/12/2011 |
| 0331 628 | BT | 12/12/2011 |
| 0331 629 | BT | 12/12/2011 |
| 0331 630 | BT | 12/12/2011 |
| 0331 631 | BT | 12/12/2011 |
| 0331 632 | BT | 12/12/2011 |
| 0331 633 | BT | 12/12/2011 |
| 0331 634 | BT | 12/12/2011 |
| 0331 635 | BT | 12/12/2011 |
| 0331 636 | BT | 12/12/2011 |
| 0331 637 | BT | 12/12/2011 |
| 0331 638 | BT | 12/12/2011 |
| 0331 639 | BT | 12/12/2011 |
| 0331 641 | BT | 12/12/2011 |
| 0331 642 | BT | 12/12/2011 |
| 0331 643 | BT | 12/12/2011 |
| 0331 644 | BT | 12/12/2011 |
| 0331 645 | BT | 12/12/2011 |
| 0331 646 | BT | 12/12/2011 |
| 0331 647 | BT | 12/12/2011 |
| 0331 648 | BT | 12/12/2011 |
| 0331 649 | BT | 12/12/2011 |
| 0331 650 | BT | 12/12/2011 |
| 0331 651 | BT | 12/12/2011 |
| 0331 652 | BT | 12/12/2011 |
| 0331 653 | BT | 12/12/2011 |
| 0331 654 | BT | 11/04/2012 |
| 0331 655 | BT | 12/12/2011 |
| 0331 656 | BT | 12/12/2011 |
| 0331 657 | BT | 15/10/2014 |
| 0331 658 | BT | 15/10/2014 |
| 0331 659 | BT | 12/12/2011 |
| 0331 660 | BT | 12/12/2011 |
| 0331 661 | BT | 12/12/2011 |
| 0331 662 | BT | 12/12/2011 |
| 0331 663 | BT | 12/12/2011 |
| 0331 664 | BT | 12/12/2011 |
| 0331 665 | BT | 12/12/2011 |
| 0331 666 | BT | 12/12/2011 |
| 0331 667 | BT | 12/12/2011 |
| 0331 668 | BT | 12/12/2011 |
| 0331 669 | BT | 12/12/2011 |
| 0333 000 | Virgin Media Limited | 26/03/2007 |
| 0333 001 | TalkTalk Communications Limited | 19/02/2009 |
| 0333 002 | Lanonyx Telecom Limited | 22/08/2011 |
| 0333 003 | TalkTalk Communications Limited | 12/05/2009 |
| 0333 004 | Gamma Telecom Holdings Ltd | 19/07/2013 |
| 0333 005 | TalkTalk Communications Limited | 22/01/2014 |
| 0333 006 | Gamma Telecom Holdings Ltd | 19/07/2013 |
| 0333 009 | Vodafone Ltd (C&W) | 28/08/2015 |
| 0333 010 | Redcentric Solutions Limited | 26/05/2016 |
| 0333 011 | Gamma Telecom Holdings Ltd | 04/02/2013 |
| 0333 012 | Vodafone Ltd (C&W) | 31/10/2013 |
| 0333 013 | Gamma Telecom Holdings Ltd | 04/02/2013 |
| 0333 014 | Gamma Telecom Holdings Ltd | 19/07/2013 |
| 0333 015 | Gamma Telecom Holdings Ltd | 26/04/2016 |
| 0333 016 | Gamma Telecom Holdings Ltd | 16/01/2017 |
| 0333 020 | AVC One Limited | 12/02/2014 |
| 0333 022 | Digital Mail Limited | 28/04/2008 |
| 0333 023 | Firstcom Europe UK Limited | 04/08/2014 |
| 0333 030 | Telecom2 Limited | 24/08/2009 |
| 0333 032 | Gamma Telecom Holdings Ltd | 23/06/2015 |
| 0333 033 | Nextec UK Limited | 26/11/2013 |
| 0333 035 | TalkTalk Communications Limited | 11/02/2019 |
| 0333 040 | Virtual Talk Ltd | 23/04/2014 |
| 0333 043 | Gamma Telecom Holdings Ltd | 09/01/2015 |
| 0333 044 | Barritel Limited | 17/10/2013 |
| 0333 045 | Fair Isaac (Adeptra) ltd | 06/04/2016 |
| 0333 050 | Mission Labs Limited | 09/05/2016 |
| 0333 055 | Barritel Limited | 26/03/2007 |
| 0333 060 | Infinity Tracking Ltd | 12/03/2018 |
| 0333 070 | Colt Technology Services | 07/06/2018 |
| 0333 077 | alwaysON Ltd | 05/03/2009 |
| 0333 080 | XoverX Ltd | 09/05/2013 |
| 0333 088 | Barritel Limited | 10/12/2015 |
| 0333 090 | Mission Labs Limited | 22/01/2019 |
| 0333 099 | 10ACT Limited | 29/01/2010 |
| 0333 100 | Sky UK Limited | 11/12/2013 |
| 0333 101 | Entanet International Ltd | 09/12/2008 |
| 0333 102 | Internetty Ltd | 01/04/2019 |
| 0333 103 | Cirrus Response Limited | 12/02/2014 |
| 0333 110 | Xoom Ltd | 12/11/2019 |
| 0333 111 | GCI Network Solutions Ltd | 20/04/2017 |
| 0333 112 | Andrews & Arnold (Numbers) Ltd | 20/05/2010 |
| 0333 113 | Whypay? Ltd | 08/11/2016 |
| 0333 121 | Windsor Telecom Ltd | 08/11/2010 |
| 0333 122 | Affiniti Integrated Solutions Limited | 29/08/2013 |
| 0333 123 | Windsor Telecom Ltd | 13/06/2011 |
| 0333 130 | Affiniti Integrated Solutions Limited | 20/06/2014 |
| 0333 131 | Business Broadcast Communications Limited | 16/10/2009 |
| 0333 133 | IV Response Limited | 23/05/2007 |
| 0333 136 | Intrado Cloud Solutions Limited | 02/06/2009 |
| 0333 137 | Intrado Cloud Solutions Limited | 17/06/2015 |
| 0333 150 | Red Matter Limited | 04/05/2010 |
| 0333 155 | Microtalk Europe Limited | 17/03/2016 |
| 0333 169 | Voxsmart Ltd | 05/09/2017 |
| 0333 188 | Gamma Telecom Holdings Ltd | 11/12/2019 |
| 0333 200 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0333 202 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0333 207 | BT | 20/06/2008 |
| 0333 210 | TTNC Limited | 01/10/2013 |
| 0333 212 | API Telecom Limited | 31/05/2012 |
| 0333 220 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0333 222 | KCOM Group Limited | 26/03/2007 |
| 0333 223 | Sark Telecom B.V. | 10/11/2009 |
| 0333 224 | Phone Buddy Limited | 14/04/2014 |
| 0333 230 | Affiniti Integrated Solutions Limited | 27/10/2015 |
| 0333 231 | Zen Internet Limited | 23/03/2009 |
| 0333 232 | 2Abroad Limited | 08/04/2014 |
| 0333 234 | TalkTalk Communications Limited | 01/05/2014 |
| 0333 237 | Sound Advertising Ltd | 09/03/2015 |
| 0333 240 | Gamma Telecom Holdings Ltd | 26/03/2007 |
| 0333 241 | Gamma Telecom Holdings Ltd | 19/06/2013 |
| 0333 242 | Magrathea Telecommunications Limited | 20/11/2018 |
| 0333 247 | Commi Holdings Limited | 17/11/2016 |
| 0333 250 | Colt Technology Services | 27/07/2012 |
| 0333 251 | Colt Technology Services | 27/07/2012 |
| 0333 252 | Colt Technology Services | 27/07/2012 |
| 0333 253 | Colt Technology Services | 27/07/2012 |
| 0333 254 | Colt Technology Services | 27/07/2012 |
| 0333 255 | Colt Technology Services | 08/04/2013 |
| 0333 256 | Colt Technology Services | 08/04/2013 |
| 0333 257 | Colt Technology Services | 08/04/2013 |
| 0333 258 | Colt Technology Services | 08/04/2013 |
| 0333 259 | Colt Technology Services | 08/04/2013 |
| 0333 266 | Barritec Limited | 26/10/2011 |
| 0333 270 | Colt Technology Services | 24/09/2013 |
| 0333 271 | Colt Technology Services | 24/09/2013 |
| 0333 272 | Colt Technology Services | 24/09/2013 |
| 0333 277 | I-NET COMMUNICATIONS GROUP PLC | 05/05/2015 |
| 0333 300 | Colt Technology Services | 26/03/2007 |
| 0333 301 | Numbers Plus Ltd | 19/07/2011 |
| 0333 302 | WIGHTFIBRE LIMITED | 26/11/2009 |
| 0333 303 | New Call Telecom Ltd | 05/05/2015 |
| 0333 304 | Vodafone Limited | 19/12/2007 |
| 0333 305 | Magrathea Telecommunications Limited | 07/03/2014 |
| 0333 306 | HONEY TELECOM LTD | 18/08/2020 |
| 0333 307 | Cloudcall Limited | 24/01/2018 |
| 0333 308 | Optify Mediaforce Limited | 16/09/2016 |
| 0333 310 | Plus Telecom Limited | 26/03/2007 |
| 0333 311 | Orbtalk Limited | 02/06/2011 |
| 0333 312 | Orbtalk Limited | 08/12/2014 |
| 0333 313 | Dynamic Mobile Billing Limited | 07/05/2008 |
| 0333 315 | Internet of Things Limited | 13/07/2021 |
| 0333 320 | Daisy Communications Ltd | 13/12/2010 |
| 0333 321 | TalkTalk Communications Limited | 24/05/2007 |
| 0333 322 | Budget Numbers Limited | 08/06/2010 |
| 0333 323 | Invosys Limited | 10/07/2012 |
| 0333 324 | FUSION TELECOM LTD | 14/05/2020 |
| 0333 325 | Syntec Limited | 20/11/2013 |
| 0333 327 | NETOMNIA LIMITED | 29/05/2020 |
| 0333 328 | TalkTalk Communications Limited | 11/04/2019 |
| 0333 329 | Core Communication Services Limited | 20/11/2013 |
| 0333 331 | Affiniti Integrated Solutions Limited | 29/08/2013 |
| 0333 332 | Storacall Technology Limited | 19/11/2009 |
| 0333 333 | Sesui Limited | 26/03/2007 |
| 0333 334 | Solutios Limited | 06/10/2008 |
| 0333 335 | Liquid 11 Limited | 15/11/2012 |
| 0333 336 | Mintaka Limited | 30/12/2013 |
| 0333 337 | Internet of Things Limited | 13/07/2021 |
| 0333 338 | Hutchison 3G UK Ltd | 05/09/2007 |
| 0333 339 | IP Voice Networks Ltd | 10/07/2017 |
| 0333 340 | Andrews & Arnold Ltd | 11/04/2007 |
| 0333 342 | COMMUNITY FIBRE LIMITED | 17/01/2019 |
| 0333 343 | Virgin Media Limited | 18/02/2014 |
| 0333 344 | AQL Wholesale Ltd | 26/03/2007 |
| 0333 345 | Verizon UK Limited | 26/03/2007 |
| 0333 349 | EG TECHNOLOGIES LIMITED | 20/01/2020 |
| 0333 355 | Core Telecom Limited | 04/06/2007 |
| 0333 358 | VoiceHost Limited | 20/01/2011 |
| 0333 360 | IP Wholesale Limited | 02/06/2017 |
| 0333 363 | Affiniti Integrated Solutions Limited | 04/04/2016 |
| 0333 365 | WIZE ANALYTICS LIMITED | 29/04/2019 |
| 0333 366 | Nationwide Telephone Assistance Ltd | 13/12/2007 |
| 0333 370 | Planet Numbers Ltd | 01/05/2009 |
| 0333 379 | Resilient PLC | 07/05/2014 |
| 0333 380 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 381 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 382 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 383 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 384 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 385 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 386 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 388 | Glide Student and Residential Limited | 07/02/2013 |
| 0333 390 | Vox Sciences Limited | 26/07/2012 |
| 0333 391 | Vox Sciences Limited | 26/07/2012 |
| 0333 399 | Resilient PLC | 04/06/2007 |
| 0333 400 | Call Stream Limited | 26/03/2007 |
| 0333 402 | Numbers Telecom Limited | 31/03/2016 |
| 0333 404 | Phone Buddy Limited | 14/04/2014 |
| 0333 405 | VTSL Ltd | 06/11/2015 |
| 0333 412 | Central Technology Limited | 06/07/2015 |
| 0333 414 | Affiniti Integrated Solutions Limited | 26/06/2014 |
| 0333 433 | IM Software Ltd | 28/05/2009 |
| 0333 434 | Redcentric Solutions Limited | 26/05/2016 |
| 0333 435 | IPV6 Limited | 20/01/2009 |
| 0333 440 | Telecom2 Limited | 20/11/2012 |
| 0333 443 | Nexbridge Communications Limited | 09/01/2012 |
| 0333 444 | TTNC Limited | 01/10/2013 |
| 0333 445 | Voice Simplified Limited | 25/06/2013 |
| 0333 455 | Affiniti Integrated Solutions Limited | 01/12/2017 |
| 0333 456 | Windsor Telecom Ltd | 30/03/2011 |
| 0333 500 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0333 533 | Cloud Telecom Ltd | 07/02/2012 |
| 0333 535 | Neutrino Networks Limited | 10/12/2013 |
| 0333 543 | Orderly Telecoms Limited | 02/08/2012 |
| 0333 544 | Numbers Telecom Limited | 11/02/2016 |
| 0333 550 | London Central Communications Ltd | 12/08/2009 |
| 0333 553 | CFL Communications Ltd | 31/05/2018 |
| 0333 554 | Gamma Telecom Holdings Ltd | 30/03/2015 |
| 0333 555 | GCI Network Solutions Ltd | 20/04/2017 |
| 0333 556 | GCI Network Solutions Ltd | 20/04/2017 |
| 0333 566 | GCI Network Solutions Ltd | 01/06/2017 |
| 0333 567 | Invoco Ltd | 14/04/2010 |
| 0333 577 | Telecoms World PLC | 13/04/2007 |
| 0333 600 | Windsor Telecom Ltd | 26/06/2008 |
| 0333 602 | Numbers Telecom Limited | 31/03/2016 |
| 0333 613 | PAYMENT WORLD LTD | 26/10/2020 |
| 0333 622 | Promotions4All Ltd | 23/12/2009 |
| 0333 664 | BT | 18/11/2014 |
| 0333 665 | BT | 18/11/2014 |
| 0333 666 | Admiral Telecom Limited | 26/03/2007 |
| 0333 670 | Adviqo UK Limited | 30/08/2012 |
| 0333 677 | SOS Technology Limited | 09/08/2012 |
| 0333 678 | Nexbridge Communications Limited | 07/07/2021 |
| 0333 688 | Numbers Telecom Limited | 12/07/2012 |
| 0333 696 | Gamma Telecom Holdings Ltd | 30/03/2015 |
| 0333 700 | Windsor Telecom Ltd | 13/06/2011 |
| 0333 720 | Marathon Telecom Limited | 15/01/2015 |
| 0333 733 | Telecoms World Direct Ltd | 11/01/2011 |
| 0333 750 | Tabsoft Limited | 17/03/2014 |
| 0333 759 | Sky UK Limited | 16/11/2016 |
| 0333 772 | Kalnet4U Ltd | 25/11/2011 |
| 0333 773 | Number Services Ltd. | 22/11/2018 |
| 0333 777 | TalkTalk Communications Limited | 17/02/2012 |
| 0333 789 | Nectar Cloud | 21/07/2015 |
| 0333 800 | Floren Limited | 14/11/2014 |
| 0333 833 | Mi Telecom Limited | 26/05/2016 |
| 0333 838 | Yim Siam Telecom | 03/12/2013 |
| 0333 866 | Redcentric Solutions Limited | 26/05/2016 |
| 0333 880 | Simwood eSMS Limited | 15/06/2015 |
| 0333 881 | Annecto Telecom | 11/05/2017 |
| 0333 888 | Reality Network Services Limited | 26/03/2007 |
| 0333 898 | Antheus Telecom Limited | 15/08/2017 |
| 0333 900 | Windsor Telecom Ltd | 26/03/2007 |
| 0333 920 | Core Telecom Limited | 25/11/2011 |
| 0333 939 | Redwood Technologies Ltd | 20/11/2018 |
| 0333 966 | Sound Advertising Ltd | 22/03/2011 |
| 0333 970 | Maxadie Limited | 02/03/2015 |
| 0333 977 | 24 Seven Communications Ltd | 20/10/2010 |
| 0333 979 | Sports Tel Ltd | 15/11/2010 |
| 0333 987 | Redwood Technologies Ltd | 20/11/2018 |
| 0333 988 | Relax Telecom Limited | 09/02/2009 |
| 0333 990 | Nodemax Limited | 08/07/2008 |
| 0333 992 | Bellingham Telecommunications Ltd | 29/09/2015 |
| 0333 996 | Fuse 2 Communications Ltd | 01/07/2016 |
| 0333 998 | Gencom Technologies Ltd | 31/03/2015 |
| 0333 999 | TalkTalk Communications Limited | 07/11/2013 |
| 0343 005 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0343 006 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0343 021 | Gamma Telecom Holdings Ltd | 17/11/2016 |
| 0343 034 | VoIP-Un Limited | 06/07/2017 |
| 0343 036 | Vodafone Ltd (C&W) | 13/08/2015 |
| 0343 100 | Content Guru Limited | 23/04/2014 |
| 0343 101 | Content Guru Limited | 23/04/2014 |
| 0343 102 | Content Guru Limited | 23/04/2014 |
| 0343 103 | Content Guru Limited | 23/04/2014 |
| 0343 104 | Content Guru Limited | 23/04/2014 |
| 0343 130 | VOXYONDER NETWORK SERVICES UK LTD | 02/09/2020 |
| 0343 168 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 169 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 170 | Virgin Media Limited | 27/03/2012 |
| 0343 171 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 172 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 176 | Inet Telecoms Ltd (Voipfone) | 12/07/2012 |
| 0343 178 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0343 206 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0343 208 | TalkTalk Communications Limited | 13/01/2011 |
| 0343 209 | GCI Network Solutions Ltd | 03/05/2017 |
| 0343 210 | TalkTalk Communications Limited | 13/01/2011 |
| 0343 212 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 216 | Vodafone Ltd (C&W) | 08/04/2014 |
| 0343 218 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 221 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 222 | Telecoms World PLC | 15/11/2010 |
| 0343 224 | TalkTalk Communications Limited | 13/01/2011 |
| 0343 225 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 226 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 227 | Call Stream Limited | 30/06/2014 |
| 0343 247 | TalkTalk Communications Limited | 13/01/2011 |
| 0343 248 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0343 249 | Core Telecom Limited | 19/02/2014 |
| 0343 250 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 251 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 252 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 253 | Core Telecom Limited | 19/02/2014 |
| 0343 254 | TelXL Ltd | 03/04/2014 |
| 0343 255 | Core Telecom Limited | 19/02/2014 |
| 0343 256 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 257 | Core Telecom Limited | 19/02/2014 |
| 0343 258 | Core Telecom Limited | 19/02/2014 |
| 0343 259 | Core Telecom Limited | 19/02/2014 |
| 0343 260 | Core Telecom Limited | 19/02/2014 |
| 0343 261 | Core Telecom Limited | 19/02/2014 |
| 0343 262 | Core Telecom Limited | 19/02/2014 |
| 0343 265 | Core Telecom Limited | 19/02/2014 |
| 0343 266 | Core Telecom Limited | 19/02/2014 |
| 0343 267 | Core Telecom Limited | 19/02/2014 |
| 0343 268 | Core Telecom Limited | 19/02/2014 |
| 0343 269 | Core Telecom Limited | 19/02/2014 |
| 0343 270 | Core Telecom Limited | 19/02/2014 |
| 0343 271 | Core Telecom Limited | 19/02/2014 |
| 0343 272 | Core Telecom Limited | 19/02/2014 |
| 0343 273 | Core Telecom Limited | 19/02/2014 |
| 0343 274 | Core Telecom Limited | 19/02/2014 |
| 0343 275 | Core Telecom Limited | 19/02/2014 |
| 0343 276 | Core Telecom Limited | 19/02/2014 |
| 0343 277 | Core Telecom Limited | 19/02/2014 |
| 0343 278 | Core Telecom Limited | 19/02/2014 |
| 0343 279 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 281 | Virgin Media Limited | 08/04/2016 |
| 0343 282 | Virgin Media Limited | 08/04/2016 |
| 0343 283 | Virgin Media Limited | 08/04/2016 |
| 0343 284 | Virgin Media Limited | 08/04/2016 |
| 0343 289 | Liquid 11 Limited | 06/10/2014 |
| 0343 290 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 299 | Virgin Media Limited | 27/03/2012 |
| 0343 308 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 309 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 310 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 311 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 312 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 313 | Vodafone Ltd (C&W) | 11/06/2014 |
| 0343 314 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 315 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 316 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 317 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 318 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 319 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 320 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 321 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 322 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 323 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 324 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 325 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 326 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 330 | Telappliant Ltd | 11/06/2014 |
| 0343 351 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 353 | TelXL Ltd | 03/04/2014 |
| 0343 354 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 356 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 357 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 363 | Virgin Media Limited | 27/03/2012 |
| 0343 364 | Virgin Media Limited | 27/03/2012 |
| 0343 365 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 372 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0343 373 | Colt Technology Services | 12/06/2017 |
| 0343 374 | Colt Technology Services | 12/06/2017 |
| 0343 378 | Voxbone SA | 19/07/2021 |
| 0343 382 | Virgin Media Limited | 08/04/2016 |
| 0343 401 | DRD Communications Limited | 26/07/2016 |
| 0343 402 | DRD Communications Limited | 26/07/2016 |
| 0343 411 | 24 Seven Communications Ltd | 28/02/2013 |
| 0343 412 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 414 | Spitfire Network Services Limited | 22/09/2015 |
| 0343 415 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 416 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 417 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 418 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 419 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 420 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 421 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 422 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 423 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 424 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 425 | Business Broadcast Communications Limited | 08/07/2016 |
| 0343 426 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 427 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 428 | Business Broadcast Communications Limited | 07/07/2016 |
| 0343 429 | Virgin Media Limited | 27/03/2012 |
| 0343 446 | 24 Seven Communications Ltd | 26/02/2013 |
| 0343 447 | 24 Seven Communications Ltd | 26/02/2013 |
| 0343 448 | 24 Seven Communications Ltd | 26/02/2013 |
| 0343 450 | 24 Seven Communications Ltd | 26/02/2013 |
| 0343 453 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 455 | Telecoms World PLC | 15/11/2010 |
| 0343 464 | TeleSurf Limited | 23/07/2015 |
| 0343 465 | Call Stream Limited | 30/06/2014 |
| 0343 469 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 470 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 471 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 472 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 473 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 474 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 487 | TalkTalk Communications Limited | 13/01/2011 |
| 0343 493 | Virgin Media Limited | 08/04/2016 |
| 0343 504 | Invosys Limited | 14/05/2014 |
| 0343 506 | Invosys Limited | 14/05/2014 |
| 0343 507 | Invosys Limited | 14/05/2014 |
| 0343 508 | Mintaka Limited | 30/12/2013 |
| 0343 509 | Invosys Limited | 14/05/2014 |
| 0343 510 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0343 515 | Invosys Limited | 14/05/2014 |
| 0343 516 | TeleSurf Limited | 23/07/2015 |
| 0343 517 | TeleSurf Limited | 23/07/2015 |
| 0343 518 | TeleSurf Limited | 23/07/2015 |
| 0343 519 | TeleSurf Limited | 23/07/2015 |
| 0343 520 | TeleSurf Limited | 23/07/2015 |
| 0343 521 | TeleSurf Limited | 23/07/2015 |
| 0343 522 | TeleSurf Limited | 23/07/2015 |
| 0343 523 | Liquid 11 Limited | 06/10/2014 |
| 0343 532 | Telappliant Ltd | 15/10/2015 |
| 0343 533 | 24 Seven Communications Ltd | 26/02/2013 |
| 0343 535 | 24 Seven Communications Ltd | 26/02/2013 |
| 0343 538 | TalkTalk Communications Limited | 13/01/2011 |
| 0343 543 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 547 | Numbers Telecom Limited | 11/02/2016 |
| 0343 548 | Numbers Telecom Limited | 11/02/2016 |
| 0343 549 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 550 | Numbers Telecom Limited | 11/02/2016 |
| 0343 552 | Numbers Telecom Limited | 11/02/2016 |
| 0343 557 | VoiceHost Limited | 20/01/2011 |
| 0343 561 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0343 566 | Numbers Telecom Limited | 11/02/2016 |
| 0343 567 | Numbers Telecom Limited | 11/02/2016 |
| 0343 568 | Numbers Telecom Limited | 11/02/2016 |
| 0343 569 | Numbers Telecom Limited | 11/02/2016 |
| 0343 592 | TTNC Limited | 20/04/2015 |
| 0343 593 | TTNC Limited | 20/04/2015 |
| 0343 596 | Vodafone Ltd (C&W) | 15/03/2016 |
| 0343 597 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0343 611 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 612 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 634 | Affiniti Integrated Solutions Limited | 13/01/2011 |
| 0343 636 | Affiniti Integrated Solutions Limited | 13/01/2011 |
| 0343 653 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0343 658 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 659 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 660 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 661 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 662 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 663 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 664 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 665 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 666 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 667 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 668 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 669 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0343 693 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 697 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 698 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 699 | BT | 20/05/2014 |
| 0343 700 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 701 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0343 707 | Liquid 11 Limited | 06/10/2014 |
| 0343 708 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0343 714 | Calltracks Limited | 14/05/2014 |
| 0343 720 | Aloha Telecommunications Ltd | 26/07/2012 |
| 0343 751 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 754 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 770 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0343 772 | Kalnet4U Ltd | 29/11/2011 |
| 0343 775 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0343 777 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0343 778 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0343 781 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0343 783 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0343 809 | Voxbone SA | 19/07/2021 |
| 0343 811 | VoiceHost Limited | 25/06/2014 |
| 0343 812 | VoiceHost Limited | 25/06/2014 |
| 0343 813 | VoiceHost Limited | 25/06/2014 |
| 0343 814 | VoiceHost Limited | 25/06/2014 |
| 0343 816 | TalkTalk Communications Limited | 29/04/2014 |
| 0343 827 | Voxbone SA | 19/07/2021 |
| 0343 829 | Liquid 11 Limited | 06/10/2014 |
| 0343 831 | Liquid 11 Limited | 06/10/2014 |
| 0343 834 | Liquid 11 Limited | 06/10/2014 |
| 0343 836 | BT | 20/05/2014 |
| 0343 838 | Cloud Telecom Ltd | 23/09/2015 |
| 0343 839 | BT | 20/05/2014 |
| 0343 841 | BT | 20/05/2014 |
| 0343 849 | Telappliant Ltd | 11/06/2014 |
| 0343 876 | FUSION TELECOM LTD | 14/05/2020 |
| 0343 886 | Liquid 11 Limited | 06/10/2014 |
| 0343 889 | Voice Simplified Limited | 06/06/2014 |
| 0343 902 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 903 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0343 904 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0343 909 | Affiniti Integrated Solutions Limited | 25/11/2015 |
| 0343 910 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0343 911 | Affiniti Integrated Solutions Limited | 25/11/2015 |
| 0343 919 | Redwood Technologies Ltd | 20/11/2018 |
| 0343 929 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0343 932 | Colt Technology Services | 12/06/2017 |
| 0343 934 | Telecoms World Direct Ltd | 21/07/2014 |
| 0343 939 | Sigma Voice Solutions Ltd | 02/05/2017 |
| 0343 943 | Redwood Technologies Ltd | 20/11/2018 |
| 0343 944 | Redwood Technologies Ltd | 20/11/2018 |
| 0343 976 | FUSION TELECOM LTD | 14/05/2020 |
| 0343 987 | Redwood Technologies Ltd | 20/11/2018 |
| 0343 999 | Redwood Technologies Ltd | 20/11/2018 |
| 0344 040 2 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 040 4 | BT | 03/06/2010 |
| 0344 040 5 | BT | 03/06/2010 |
| 0344 041 2 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 041 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 041 9 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 042 4 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 043 3 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 044 0 | TalkTalk Communications Limited | 29/04/2014 |
| 0344 044 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 044 7 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 046 6 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 047 7 | Colt Technology Services | 25/04/2007 |
| 0344 048 8 | Vodafone Ltd (C&W) | 13/08/2015 |
| 0344 050 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 050 1 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 050 2 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 050 9 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 055 1 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 055 7 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 056 4 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 056 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 056 7 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 057 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 058 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 058 5 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 058 7 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 090 0 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 090 2 | BT | 03/06/2010 |
| 0344 090 3 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 090 8 | BT | 03/06/2010 |
| 0344 090 9 | BT | 03/06/2010 |
| 0344 091 0 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 092 3 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 093 0 | Colt Technology Services | 25/04/2007 |
| 0344 093 1 | Colt Technology Services | 25/04/2007 |
| 0344 093 2 | Colt Technology Services | 25/04/2007 |
| 0344 093 3 | Colt Technology Services | 25/04/2007 |
| 0344 093 4 | Colt Technology Services | 25/04/2007 |
| 0344 093 5 | Colt Technology Services | 25/04/2007 |
| 0344 093 6 | Colt Technology Services | 25/04/2007 |
| 0344 093 7 | Colt Technology Services | 25/04/2007 |
| 0344 093 8 | Colt Technology Services | 25/04/2007 |
| 0344 093 9 | Colt Technology Services | 25/04/2007 |
| 0344 094 2 | Daisy Communications Ltd | 30/04/2014 |
| 0344 094 3 | Daisy Communications Ltd | 30/04/2014 |
| 0344 094 4 | Daisy Communications Ltd | 30/04/2014 |
| 0344 094 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 095 5 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 096 5 | Daisy Communications Ltd | 30/04/2014 |
| 0344 097 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 097 8 | Solutios Limited | 06/10/2008 |
| 0344 098 8 | Vodafone Ltd (C&W) | 13/08/2015 |
| 0344 099 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 099 9 | Vodafone Ltd (Thus) | 13/08/2015 |
| 0344 201 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 206 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 209 | Vodafone Ltd (Energis) | 11/12/2007 |
| 0344 210 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 211 | Calltracks Limited | 14/05/2014 |
| 0344 212 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 216 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 222 | Calltracks Limited | 14/05/2014 |
| 0344 225 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 227 | Nextec UK Limited | 12/05/2016 |
| 0344 230 | Calltracks Limited | 14/05/2014 |
| 0344 234 | Calltracks Limited | 14/05/2014 |
| 0344 238 | Nextec UK Limited | 12/05/2016 |
| 0344 241 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 243 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 244 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 245 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 247 | Windsor Telecom Ltd | 03/12/2012 |
| 0344 248 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 249 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 251 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 252 | Nextec UK Limited | 12/05/2016 |
| 0344 257 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 259 | Daisy Communications Ltd | 30/04/2014 |
| 0344 262 | Nextec UK Limited | 12/05/2016 |
| 0344 263 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 264 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 268 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 272 | Core Telecom Limited | 19/02/2014 |
| 0344 273 | Core Telecom Limited | 19/02/2014 |
| 0344 274 | Call Stream Limited | 30/06/2014 |
| 0344 275 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 276 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 277 | Nextec UK Limited | 02/03/2016 |
| 0344 279 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 281 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 282 | Call Stream Limited | 30/06/2014 |
| 0344 286 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 288 | Core Telecom Limited | 19/02/2014 |
| 0344 289 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 292 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 293 | Daisy Communications Ltd | 30/04/2014 |
| 0344 295 | Barritel Limited | 06/12/2010 |
| 0344 296 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 298 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 299 | Call Stream Limited | 30/06/2014 |
| 0344 301 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 305 | Barritel Limited | 06/12/2010 |
| 0344 306 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 307 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 308 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 309 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 310 | Core Telecom Limited | 19/02/2014 |
| 0344 314 | Call Stream Limited | 30/06/2014 |
| 0344 315 | Citrus Telecommunications Ltd | 03/04/2018 |
| 0344 318 | Telecoms World PLC | 14/10/2008 |
| 0344 321 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 322 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 324 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 325 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 326 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 327 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 328 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 329 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 330 | Barritel Limited | 06/12/2010 |
| 0344 332 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 333 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 334 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 335 | BT | 01/07/2008 |
| 0344 338 | Colt Technology Services | 16/04/2014 |
| 0344 346 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 351 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 353 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 357 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 369 | Orange Business Holdings UK Limited | 11/06/2014 |
| 0344 370 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 371 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 372 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 375 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 376 | AQL Wholesale Ltd | 06/11/2015 |
| 0344 381 | BT | 03/06/2010 |
| 0344 382 | Resilient PLC | 14/11/2007 |
| 0344 384 | Voiceflex Limited | 27/01/2015 |
| 0344 387 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 390 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0344 391 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 395 | Virgin Media Limited | 28/03/2012 |
| 0344 396 | Syntec Limited | 19/06/2007 |
| 0344 402 | Call Stream Limited | 30/06/2014 |
| 0344 406 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 409 | TelXL Ltd | 03/04/2014 |
| 0344 410 | Numbergroup Utilities Ltd | 18/09/2018 |
| 0344 411 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0344 412 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 413 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 414 | Nexus Telecommunications Limited | 12/07/2007 |
| 0344 415 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 417 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0344 420 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 423 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 431 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 432 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 443 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 444 | Colt Technology Services | 25/04/2007 |
| 0344 445 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 448 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 453 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 460 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 463 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 468 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 472 | Virgin Media Limited | 08/04/2016 |
| 0344 477 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 478 | Digital Mail Limited | 11/05/2016 |
| 0344 479 | Call Stream Limited | 30/06/2014 |
| 0344 481 | Virgin Media Limited | 28/03/2012 |
| 0344 482 | Syntec Limited | 19/06/2007 |
| 0344 484 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 488 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0344 493 | Virgin Media Limited | 08/04/2016 |
| 0344 494 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 495 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 496 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 499 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 500 | FleXtel Limited | 10/04/2007 |
| 0344 501 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 502 | TTNC Limited | 01/10/2013 |
| 0344 504 | Core Telecom Limited | 25/11/2011 |
| 0344 507 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 509 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 511 | Syntec Limited | 19/06/2007 |
| 0344 512 | TTNC Limited | 20/04/2015 |
| 0344 515 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 517 | Virgin Media Limited | 08/04/2016 |
| 0344 520 | Virgin Media Limited | 28/03/2012 |
| 0344 522 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 526 | Virgin Media Limited | 08/04/2016 |
| 0344 527 | Syntec Limited | 19/06/2007 |
| 0344 528 | Virgin Media Limited | 08/04/2016 |
| 0344 530 | Syntec Limited | 19/06/2007 |
| 0344 531 | Virgin Media Limited | 08/04/2016 |
| 0344 535 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 537 | Virgin Media Limited | 08/04/2016 |
| 0344 538 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 539 | Calltracks Limited | 14/05/2014 |
| 0344 542 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 543 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 544 | TelXL Ltd | 03/04/2014 |
| 0344 545 | Swiftnet Ltd | 04/09/2007 |
| 0344 546 | Lumen Technologies UK Limited | 10/04/2007 |
| 0344 549 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 551 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 552 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 553 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 556 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 557 | Call Stream Limited | 30/06/2014 |
| 0344 558 | Calltracks Limited | 14/05/2014 |
| 0344 560 | Sesui Limited | 15/09/2014 |
| 0344 561 | BT | 01/07/2008 |
| 0344 563 | Pulsant (Scotland) Limited | 28/07/2015 |
| 0344 567 | Telecoms World PLC | 05/10/2007 |
| 0344 568 | Nextec UK Limited | 02/03/2016 |
| 0344 570 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 571 | Virgin Media Limited | 08/04/2016 |
| 0344 573 | Call Stream Limited | 30/06/2014 |
| 0344 576 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 577 | Call Stream Limited | 30/06/2014 |
| 0344 579 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0344 580 | Colt Technology Services | 19/08/2015 |
| 0344 581 | Colt Technology Services | 25/04/2007 |
| 0344 583 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 585 | FleXtel Limited | 10/04/2007 |
| 0344 586 | FleXtel Limited | 10/04/2007 |
| 0344 587 | FleXtel Limited | 10/04/2007 |
| 0344 588 | FleXtel Limited | 10/04/2007 |
| 0344 589 | FleXtel Limited | 10/04/2007 |
| 0344 594 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 598 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 600 | Virgin Media Limited | 08/04/2016 |
| 0344 603 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 606 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 609 | TTNC Limited | 01/10/2013 |
| 0344 611 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 612 | Virgin Media Limited | 08/04/2016 |
| 0344 616 | TTNC Limited | 01/10/2013 |
| 0344 619 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 620 | Virgin Media Limited | 08/04/2016 |
| 0344 622 | TTNC Limited | 01/10/2013 |
| 0344 623 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 625 | TTNC Limited | 20/04/2015 |
| 0344 626 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 630 | Virgin Media Limited | 08/04/2016 |
| 0344 633 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 635 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 636 | TTNC Limited | 01/10/2013 |
| 0344 641 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 644 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 645 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0344 646 | BT | 03/06/2010 |
| 0344 647 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 649 | Calltracks Limited | 14/05/2014 |
| 0344 655 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 656 | TTNC Limited | 20/04/2015 |
| 0344 659 | Calltracks Limited | 14/05/2014 |
| 0344 660 | FleXtel Limited | 10/04/2007 |
| 0344 663 | Admiral Telecom Limited | 09/11/2007 |
| 0344 664 | FleXtel Limited | 10/04/2007 |
| 0344 665 | FleXtel Limited | 10/04/2007 |
| 0344 668 | TTNC Limited | 01/10/2013 |
| 0344 678 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 680 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 682 | Core Telecom Limited | 19/02/2014 |
| 0344 686 | Core Telecom Limited | 19/02/2014 |
| 0344 688 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 690 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 692 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0344 693 | BT | 03/06/2010 |
| 0344 700 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 701 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 704 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 705 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 706 | TelXL Ltd | 03/04/2014 |
| 0344 711 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 712 | Virgin Media Limited | 08/04/2016 |
| 0344 713 | Syntec Limited | 19/06/2007 |
| 0344 718 | Virgin Media Limited | 08/04/2016 |
| 0344 720 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 725 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 728 | BT | 01/07/2008 |
| 0344 735 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 736 | BT | 01/07/2008 |
| 0344 739 | Core Telecom Limited | 19/02/2014 |
| 0344 740 | Barritel Limited | 10/12/2015 |
| 0344 742 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 743 | Virgin Media Limited | 28/03/2012 |
| 0344 745 | Commi Holdings Limited | 17/11/2016 |
| 0344 748 | BT | 01/07/2008 |
| 0344 750 | Virgin Media Limited | 28/03/2012 |
| 0344 755 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 757 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 766 | Barritec Limited | 18/12/2015 |
| 0344 767 | Syntec Limited | 19/06/2007 |
| 0344 768 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 770 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 772 | FleXtel Limited | 10/04/2007 |
| 0344 774 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 776 | Windsor Telecom Ltd | 13/06/2011 |
| 0344 777 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 778 | Resilient PLC | 14/11/2007 |
| 0344 779 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0344 781 | Virgin Media Limited | 08/04/2016 |
| 0344 782 | Syntec Limited | 19/06/2007 |
| 0344 785 | Virgin Media Limited | 08/04/2016 |
| 0344 788 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 793 | Virgin Media Limited | 08/04/2016 |
| 0344 798 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 800 | BT | 01/07/2008 |
| 0344 801 | Daisy Communications Ltd | 30/04/2014 |
| 0344 802 | FleXtel Limited | 10/04/2007 |
| 0344 804 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 807 | Daisy Communications Ltd | 30/04/2014 |
| 0344 808 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 809 | BT | 01/07/2008 |
| 0344 810 | TeleSurf Limited | 23/07/2015 |
| 0344 811 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 812 | FleXtel Limited | 10/04/2007 |
| 0344 815 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 818 | TTNC Limited | 01/10/2013 |
| 0344 820 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0344 822 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 823 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 824 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 826 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 829 | Daisy Communications Ltd | 30/04/2014 |
| 0344 832 | TelXL Ltd | 03/04/2014 |
| 0344 833 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 835 | New Call Telecom Ltd | 01/10/2015 |
| 0344 836 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 838 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 840 | Windsor Telecom Ltd | 04/09/2007 |
| 0344 842 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 844 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 846 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 847 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 848 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 849 | Daisy Communications Ltd | 30/04/2014 |
| 0344 850 | Windsor Telecom Ltd | 30/03/2011 |
| 0344 854 | Vodafone Ltd (Energis) | 11/12/2007 |
| 0344 855 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 856 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 858 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0344 859 | Daisy Communications Ltd | 30/04/2014 |
| 0344 860 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 863 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 866 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 870 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0344 871 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 873 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 874 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0344 875 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 879 | BT | 01/07/2008 |
| 0344 880 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 881 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 884 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 887 | Digital Space Group Limited | 01/06/2018 |
| 0344 888 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 890 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0344 891 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 892 | BT | 01/07/2008 |
| 0344 893 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 894 | Virgin Media Limited | 28/03/2012 |
| 0344 897 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 900 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0344 902 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 904 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 905 | Digital Mail Limited | 11/05/2016 |
| 0344 907 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 910 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 912 | Syntec Limited | 19/06/2007 |
| 0344 916 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 922 | Call Stream Limited | 30/06/2014 |
| 0344 927 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 928 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 931 | Virgin Media Limited | 08/04/2016 |
| 0344 933 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 936 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 939 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 940 | TTNC Limited | 20/04/2015 |
| 0344 941 | Virgin Media Limited | 08/04/2016 |
| 0344 943 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 944 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0344 947 | Calltracks Limited | 14/05/2014 |
| 0344 955 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 957 | Barritel Limited | 06/12/2010 |
| 0344 963 | Nexus Telecommunications Limited | 11/12/2013 |
| 0344 965 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 967 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 970 | Digital Mail Limited | 11/05/2016 |
| 0344 975 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 976 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 977 | Call Stream Limited | 30/06/2014 |
| 0344 979 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 980 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 983 | Digital Mail Limited | 11/05/2016 |
| 0344 984 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 986 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 987 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 989 | TelXL Ltd | 03/04/2014 |
| 0344 991 | Invade International Ltd | 13/01/2016 |
| 0344 993 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0344 994 | Verizon UK Limited | 24/04/2007 |
| 0344 997 | Telecoms World Direct Ltd | 20/11/2008 |
| 0344 998 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0344 999 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0345 000 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 001 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 002 | Virgin Media Limited | 08/04/2016 |
| 0345 003 | GCI Network Solutions Ltd | 01/06/2017 |
| 0345 004 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0345 006 | Redcentric Solutions Limited | 26/05/2016 |
| 0345 008 | Verizon UK Limited | 17/04/2007 |
| 0345 009 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0345 010 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 011 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 013 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 014 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 015 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 017 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 018 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 019 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 020 | GCI Network Solutions Ltd | 20/04/2017 |
| 0345 021 | Alphatalk Limited | 25/03/2009 |
| 0345 023 | Telefonica UK Limited | 12/02/2018 |
| 0345 025 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0345 026 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 028 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0345 030 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 031 | Telecom2 Limited | 22/10/2009 |
| 0345 032 | 24 Seven Communications Ltd | 04/10/2011 |
| 0345 034 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 036 | New Call Telecom Ltd | 29/10/2015 |
| 0345 039 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 040 | Call Stream Limited | 16/05/2013 |
| 0345 045 | Virgin Media Limited | 18/10/2007 |
| 0345 050 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 051 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 052 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 053 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 054 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 055 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 056 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 057 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 058 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 059 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 060 | Talk Numbers Ltd | 08/06/2010 |
| 0345 061 | Talk Numbers Ltd | 08/06/2010 |
| 0345 062 | Talk Numbers Ltd | 08/06/2010 |
| 0345 063 | Talk Numbers Ltd | 08/06/2010 |
| 0345 064 | Talk Numbers Ltd | 08/06/2010 |
| 0345 065 | Talk Numbers Ltd | 08/06/2010 |
| 0345 066 | Budget Numbers Limited | 08/06/2010 |
| 0345 067 | Budget Numbers Limited | 08/06/2010 |
| 0345 068 | Budget Numbers Limited | 08/06/2010 |
| 0345 069 | Budget Numbers Limited | 08/06/2010 |
| 0345 070 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 071 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 072 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 073 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 074 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 075 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 076 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 077 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 078 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 079 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 080 | Verizon UK Limited | 17/04/2007 |
| 0345 081 | Verizon UK Limited | 17/04/2007 |
| 0345 082 | Verizon UK Limited | 17/04/2007 |
| 0345 083 | Verizon UK Limited | 17/04/2007 |
| 0345 084 | Verizon UK Limited | 17/04/2007 |
| 0345 085 | Verizon UK Limited | 17/04/2007 |
| 0345 086 | Verizon UK Limited | 17/04/2007 |
| 0345 087 | Verizon UK Limited | 17/04/2007 |
| 0345 088 | Verizon UK Limited | 17/04/2007 |
| 0345 089 | Verizon UK Limited | 17/04/2007 |
| 0345 090 | Orange Business Holdings UK Limited | 26/02/2013 |
| 0345 092 | Syntec Limited | 19/06/2007 |
| 0345 094 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 095 | Numbergroup Utilities Ltd | 19/10/2010 |
| 0345 098 | Mintaka Limited | 11/06/2014 |
| 0345 099 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 100 | Verizon UK Limited | 17/04/2007 |
| 0345 101 | Verizon UK Limited | 17/04/2007 |
| 0345 102 | Verizon UK Limited | 17/04/2007 |
| 0345 103 | Verizon UK Limited | 17/04/2007 |
| 0345 104 | Verizon UK Limited | 17/04/2007 |
| 0345 105 | Verizon UK Limited | 17/04/2007 |
| 0345 106 | Verizon UK Limited | 17/04/2007 |
| 0345 108 | Swiftnet Ltd | 27/10/2015 |
| 0345 110 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 111 | Virgin Media Limited | 08/04/2016 |
| 0345 112 | Virgin Media Limited | 08/04/2016 |
| 0345 113 | Virgin Media Limited | 08/04/2016 |
| 0345 115 | Alphatalk Limited | 30/01/2014 |
| 0345 116 | Phone Buddy Limited | 14/04/2014 |
| 0345 117 | Virgin Media Limited | 08/04/2016 |
| 0345 118 | GCI Network Solutions Ltd | 20/04/2017 |
| 0345 119 | Pulsant (Scotland) Limited | 28/07/2015 |
| 0345 120 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 121 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 122 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 123 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 124 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 125 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 126 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 127 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 128 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 129 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 130 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 131 | Redcentric Solutions Limited | 26/05/2016 |
| 0345 136 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 139 | Invoco Ltd | 26/10/2017 |
| 0345 140 | Virgin Media Limited | 08/04/2016 |
| 0345 141 | Virgin Media Limited | 08/04/2016 |
| 0345 142 | Virgin Media Limited | 08/04/2016 |
| 0345 143 | Virgin Media Limited | 08/04/2016 |
| 0345 144 | Virgin Media Limited | 08/04/2016 |
| 0345 145 | Virgin Media Limited | 08/04/2016 |
| 0345 146 | Virgin Media Limited | 08/04/2016 |
| 0345 147 | Virgin Media Limited | 08/04/2016 |
| 0345 148 | Virgin Media Limited | 08/04/2016 |
| 0345 149 | Virgin Media Limited | 08/04/2016 |
| 0345 151 | Virgin Media Limited | 08/04/2016 |
| 0345 154 | Magrathea Telecommunications Limited | 10/02/2012 |
| 0345 155 | Virgin Media Limited | 08/04/2016 |
| 0345 160 | Gamma Telecom Holdings Ltd | 24/11/2017 |
| 0345 161 | BT | 03/06/2010 |
| 0345 162 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0345 163 | Core Telecom Limited | 25/11/2011 |
| 0345 164 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 165 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 166 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 168 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 170 | Budget Numbers Limited | 19/01/2009 |
| 0345 172 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 174 | Telecom2 Limited | 22/10/2009 |
| 0345 176 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0345 177 | Digital Space Group Limited | 29/02/2016 |
| 0345 179 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 180 | Digital Space Group Limited | 29/02/2016 |
| 0345 183 | Calltracks Limited | 03/02/2014 |
| 0345 184 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 187 | Gamma Telecom Holdings Ltd | 17/07/2013 |
| 0345 189 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 190 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 193 | Citrus Telecommunications Ltd | 06/07/2007 |
| 0345 194 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 195 | New Call Telecom Ltd | 29/10/2015 |
| 0345 196 | Virgin Media Limited | 18/07/2008 |
| 0345 198 | QX Telecom Ltd | 26/03/2013 |
| 0345 199 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 200 | Daisy Communications Ltd | 13/12/2010 |
| 0345 201 | Daisy Communications Ltd | 13/12/2010 |
| 0345 202 | Daisy Communications Ltd | 13/12/2010 |
| 0345 203 | Daisy Communications Ltd | 13/12/2010 |
| 0345 204 | Daisy Communications Ltd | 13/12/2010 |
| 0345 205 | Daisy Communications Ltd | 13/12/2010 |
| 0345 206 | Daisy Communications Ltd | 13/12/2010 |
| 0345 207 | Daisy Communications Ltd | 13/12/2010 |
| 0345 208 | Daisy Communications Ltd | 13/12/2010 |
| 0345 209 | Daisy Communications Ltd | 13/12/2010 |
| 0345 210 | Redcentric Solutions Limited | 26/05/2016 |
| 0345 212 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 213 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 216 | DRD Communications Limited | 20/07/2015 |
| 0345 217 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 218 | Call Stream Limited | 16/05/2013 |
| 0345 219 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 220 | Vodafone Ltd (C&W) | 28/07/2014 |
| 0345 221 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 222 | Planet Numbers Ltd | 16/07/2013 |
| 0345 223 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 224 | Barritel Limited | 10/04/2007 |
| 0345 225 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0345 226 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 227 | Vodafone Ltd (C&W) | 28/07/2014 |
| 0345 229 | Citrus Telecommunications Ltd | 03/04/2018 |
| 0345 230 | Windsor Telecom Ltd | 04/09/2007 |
| 0345 231 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 232 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 234 | Virgin Media Limited | 18/07/2008 |
| 0345 235 | Suretec Systems Ltd | 05/06/2015 |
| 0345 239 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 240 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 241 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 245 | Virgin Media Limited | 08/04/2016 |
| 0345 246 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 247 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0345 249 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 250 | TalkTalk Communications Limited | 13/01/2011 |
| 0345 251 | Redcentric Solutions Limited | 26/05/2016 |
| 0345 257 | Telecoms World PLC | 05/10/2007 |
| 0345 258 | Digital Space Group Limited | 28/09/2007 |
| 0345 259 | Commi Holdings Limited | 17/11/2016 |
| 0345 260 | Windsor Telecom Ltd | 04/09/2007 |
| 0345 261 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 262 | Spitfire Network Services Limited | 22/09/2015 |
| 0345 263 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 265 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 266 | BT | 10/04/2007 |
| 0345 267 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 268 | BT | 10/04/2007 |
| 0345 269 | Barritel Limited | 17/10/2013 |
| 0345 270 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 271 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 272 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 273 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 274 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 275 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 276 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 277 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 278 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 279 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 280 | Colt Technology Services | 25/04/2007 |
| 0345 281 | Colt Technology Services | 25/04/2007 |
| 0345 282 | Colt Technology Services | 25/04/2007 |
| 0345 283 | Colt Technology Services | 25/04/2007 |
| 0345 286 | API Telecom Limited | 07/05/2014 |
| 0345 287 | Magrathea Telecommunications Limited | 11/10/2010 |
| 0345 288 | Barritec Limited | 07/03/2013 |
| 0345 289 | Business Broadcast Communications Limited | 05/11/2009 |
| 0345 291 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 293 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 294 | Barritel Limited | 17/10/2013 |
| 0345 295 | Nexus Telecommunications Limited | 11/12/2013 |
| 0345 296 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 299 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0345 300 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 301 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 302 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 303 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 304 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 305 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 306 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 307 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 308 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 309 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 310 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 311 | Citrus Telecommunications Ltd | 08/11/2013 |
| 0345 313 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 314 | Magrathea Telecommunications Limited | 06/07/2015 |
| 0345 315 | IV Response Limited | 23/05/2007 |
| 0345 319 | Planet Numbers Ltd | 18/03/2013 |
| 0345 321 | KCOM Group Limited | 08/05/2007 |
| 0345 322 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0345 323 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0345 325 | Magrathea Telecommunications Limited | 06/07/2015 |
| 0345 330 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 331 | IV Response Limited | 23/05/2007 |
| 0345 333 | Sky UK Limited | 11/12/2013 |
| 0345 334 | Colt Technology Services | 19/08/2015 |
| 0345 337 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 338 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 340 | Invosys Limited | 28/02/2014 |
| 0345 341 | Numbers Telecom Limited | 11/02/2016 |
| 0345 345 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 346 | Calltracks Limited | 03/02/2014 |
| 0345 347 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 350 | Colt Technology Services | 25/04/2007 |
| 0345 351 | Colt Technology Services | 24/04/2007 |
| 0345 352 | Colt Technology Services | 24/04/2007 |
| 0345 353 | Colt Technology Services | 24/04/2007 |
| 0345 355 | Colt Technology Services | 24/04/2007 |
| 0345 356 | Colt Technology Services | 24/04/2007 |
| 0345 357 | Colt Technology Services | 24/04/2007 |
| 0345 358 | Colt Technology Services | 24/04/2007 |
| 0345 359 | Colt Technology Services | 24/04/2007 |
| 0345 360 | Colt Technology Services | 24/04/2007 |
| 0345 362 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 363 | Commi Holdings Limited | 17/11/2016 |
| 0345 365 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 366 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 367 | GCI Network Solutions Ltd | 03/05/2017 |
| 0345 368 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 369 | Inclarity Communications Limited | 10/08/2015 |
| 0345 370 | Windsor Telecom Ltd | 30/03/2011 |
| 0345 371 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 372 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 373 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 374 | Barritel Limited | 17/10/2013 |
| 0345 375 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 376 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 377 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 378 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 381 | Swiftnet Ltd | 22/07/2020 |
| 0345 382 | Swiftnet Ltd | 16/01/2015 |
| 0345 383 | Swiftnet Ltd | 22/07/2019 |
| 0345 386 | Nextec UK Limited | 12/05/2016 |
| 0345 387 | Nodemax Limited | 08/07/2008 |
| 0345 388 | Barritel Limited | 10/12/2015 |
| 0345 389 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 390 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 395 | Telecoms World Direct Ltd | 21/07/2014 |
| 0345 399 | Eircom (UK) Limited | 15/11/2007 |
| 0345 400 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 401 | Colt Technology Services | 25/04/2007 |
| 0345 402 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 403 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0345 404 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 405 | Verizon UK Limited | 17/04/2007 |
| 0345 408 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 409 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 410 | Lumen Technologies UK Limited | 10/04/2007 |
| 0345 413 | Node4 Ltd | 22/05/2014 |
| 0345 414 | Hospedia Limited | 07/09/2009 |
| 0345 415 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 417 | Dynamic Mobile Billing Limited | 19/10/2018 |
| 0345 421 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 422 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 424 | BT | 10/04/2007 |
| 0345 425 | Resilient PLC | 04/06/2007 |
| 0345 430 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 431 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 434 | TelXL Ltd | 09/01/2014 |
| 0345 437 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 440 | Vodafone Limited | 13/08/2015 |
| 0345 441 | Vodafone Limited | 13/08/2015 |
| 0345 442 | Vodafone Limited | 13/08/2015 |
| 0345 443 | Vodafone Limited | 13/08/2015 |
| 0345 444 | Vodafone Limited | 13/08/2015 |
| 0345 445 | Vodafone Limited | 13/08/2015 |
| 0345 446 | Vodafone Limited | 13/08/2015 |
| 0345 447 | Vodafone Limited | 13/08/2015 |
| 0345 448 | Vodafone Limited | 13/08/2015 |
| 0345 449 | Vodafone Limited | 13/08/2015 |
| 0345 450 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 451 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 452 | GCI Network Solutions Ltd | 20/04/2017 |
| 0345 453 | Inclarity Communications Limited | 10/08/2015 |
| 0345 454 | Virgin Media Limited | 21/07/2008 |
| 0345 455 | Virgin Media Limited | 21/07/2008 |
| 0345 456 | TalkTalk Communications Limited | 15/10/2013 |
| 0345 457 | Served Up Limited | 14/10/2008 |
| 0345 458 | TalkTalk Communications Limited | 13/11/2007 |
| 0345 459 | Telecoms World PLC | 13/10/2008 |
| 0345 460 | Windsor Telecom Ltd | 04/09/2007 |
| 0345 463 | Barritel Limited | 11/04/2007 |
| 0345 464 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 466 | Gamma Telecom Holdings Ltd | 17/07/2013 |
| 0345 467 | Barritel Limited | 11/04/2007 |
| 0345 468 | TTNC Limited | 01/10/2013 |
| 0345 470 | Windsor Telecom Ltd | 13/06/2011 |
| 0345 474 | Barritel Limited | 11/04/2007 |
| 0345 475 | Barritel Limited | 11/04/2007 |
| 0345 477 | Square Systems Limited | 06/11/2008 |
| 0345 478 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 480 | TeleSurf Limited | 23/07/2015 |
| 0345 481 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 482 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 484 | Barritel Limited | 10/04/2007 |
| 0345 485 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 487 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 491 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 494 | Buzz Networks Limited | 27/08/2008 |
| 0345 496 | Barritel Limited | 17/10/2013 |
| 0345 497 | BT | 10/04/2007 |
| 0345 498 | BT | 10/04/2007 |
| 0345 500 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 501 | Redwood Technologies Ltd | 20/11/2018 |
| 0345 504 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 505 | Floren Limited | 14/11/2014 |
| 0345 508 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0345 512 | Nationwide Telephone Assistance Ltd | 28/03/2017 |
| 0345 515 | Nexus Telecommunications Limited | 09/09/2008 |
| 0345 517 | Media Hawk Ltd | 03/06/2014 |
| 0345 519 | Nexus Telecommunications Limited | 09/09/2008 |
| 0345 520 | Windsor Telecom Ltd | 03/12/2012 |
| 0345 521 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 524 | VoIP-Un Limited | 06/07/2017 |
| 0345 525 | Content Guru Limited | 28/04/2014 |
| 0345 527 | Magrathea Telecommunications Limited | 14/01/2009 |
| 0345 528 | Voxbone SA | 24/12/2015 |
| 0345 529 | Sigma Voice Solutions Ltd | 11/02/2014 |
| 0345 531 | Buzz Networks Limited | 27/08/2008 |
| 0345 533 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0345 535 | Dark Group Limited | 05/11/2009 |
| 0345 539 | Invade International Ltd | 13/01/2016 |
| 0345 543 | TalkTalk Communications Limited | 19/01/2009 |
| 0345 544 | Inet Telecoms Ltd (Voipfone) | 12/07/2012 |
| 0345 548 | Telecoms World PLC | 13/10/2008 |
| 0345 549 | Solutios Limited | 06/10/2008 |
| 0345 553 | 24 Seven Communications Ltd | 21/05/2010 |
| 0345 555 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 556 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0345 557 | Telappliant Ltd | 13/07/2011 |
| 0345 559 | GCI Network Solutions Ltd | 20/04/2017 |
| 0345 561 | VoiceHost Limited | 20/01/2011 |
| 0345 564 | Magrathea Telecommunications Limited | 11/10/2010 |
| 0345 565 | BT | 20/05/2014 |
| 0345 567 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0345 576 | Numbers Plus Ltd | 02/04/2014 |
| 0345 577 | Aloha Telecommunications Ltd | 26/07/2012 |
| 0345 582 | TTNC Limited | 01/10/2013 |
| 0345 583 | BT | 10/04/2007 |
| 0345 584 | BT | 10/04/2007 |
| 0345 585 | BT | 10/04/2007 |
| 0345 586 | BT | 10/04/2007 |
| 0345 587 | BT | 10/04/2007 |
| 0345 590 | Cloud Telecom Ltd | 23/09/2015 |
| 0345 591 | Magrathea Telecommunications Limited | 24/02/2014 |
| 0345 594 | Magrathea Telecommunications Limited | 24/02/2014 |
| 0345 600 | BT | 10/04/2007 |
| 0345 601 | BT | 10/04/2007 |
| 0345 602 | BT | 10/04/2007 |
| 0345 603 | BT | 10/04/2007 |
| 0345 604 | BT | 10/04/2007 |
| 0345 605 | BT | 10/04/2007 |
| 0345 606 | BT | 10/04/2007 |
| 0345 607 | BT | 10/04/2007 |
| 0345 608 | BT | 10/04/2007 |
| 0345 609 | BT | 10/04/2007 |
| 0345 610 | BT | 10/04/2007 |
| 0345 611 | BT | 10/04/2007 |
| 0345 612 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 615 | Sesui Limited | 15/09/2014 |
| 0345 617 | Digital Space Group Limited | 10/06/2021 |
| 0345 618 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 619 | Core Telecom Limited | 19/02/2014 |
| 0345 620 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 621 | Numbergroup Utilities Ltd | 25/11/2011 |
| 0345 625 | TTNC Limited | 01/10/2013 |
| 0345 626 | Premier Voicemail Ltd | 23/10/2014 |
| 0345 630 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 631 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 632 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 634 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0345 637 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 638 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0345 639 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 640 | BT | 10/04/2007 |
| 0345 641 | BT | 10/04/2007 |
| 0345 642 | TTNC Limited | 01/10/2013 |
| 0345 643 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 644 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 646 | Gamma Telecom Holdings Ltd | 25/03/2014 |
| 0345 647 | Number Solutions Ltd | 17/09/2007 |
| 0345 649 | TTNC Limited | 20/04/2015 |
| 0345 650 | Virgin Media Limited | 18/10/2007 |
| 0345 652 | Invade International Ltd | 13/01/2016 |
| 0345 653 | Commi Holdings Limited | 17/11/2016 |
| 0345 654 | Voice Simplified Limited | 06/06/2014 |
| 0345 655 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 656 | BT | 10/04/2007 |
| 0345 658 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 659 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 660 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 661 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 662 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 663 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 664 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 665 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 666 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 667 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 668 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 669 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 671 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 672 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 673 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 674 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 675 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 676 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 677 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 678 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0345 680 | Vodafone Ltd (C&W) | 18/06/2013 |
| 0345 683 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 685 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 686 | Digital Mail Limited | 28/04/2008 |
| 0345 688 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 689 | Telecoms World Direct Ltd | 20/11/2008 |
| 0345 690 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 693 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 695 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 700 | BT | 10/04/2007 |
| 0345 701 | BT | 10/04/2007 |
| 0345 702 | BT | 10/04/2007 |
| 0345 703 | BT | 10/04/2007 |
| 0345 704 | BT | 10/04/2007 |
| 0345 705 | BT | 10/04/2007 |
| 0345 706 | BT | 10/04/2007 |
| 0345 707 | BT | 10/04/2007 |
| 0345 708 | BT | 10/04/2007 |
| 0345 709 | BT | 10/04/2007 |
| 0345 710 | BT | 10/04/2007 |
| 0345 711 | BT | 10/04/2007 |
| 0345 712 | BT | 10/04/2007 |
| 0345 713 | BT | 10/04/2007 |
| 0345 714 | BT | 10/04/2007 |
| 0345 715 | BT | 10/04/2007 |
| 0345 716 | BT | 10/04/2007 |
| 0345 717 | BT | 10/04/2007 |
| 0345 718 | BT | 10/04/2007 |
| 0345 719 | BT | 10/04/2007 |
| 0345 720 | BT | 10/04/2007 |
| 0345 721 | BT | 10/04/2007 |
| 0345 722 | BT | 10/04/2007 |
| 0345 723 | BT | 10/04/2007 |
| 0345 724 | BT | 10/04/2007 |
| 0345 725 | BT | 10/04/2007 |
| 0345 726 | BT | 10/04/2007 |
| 0345 727 | BT | 10/04/2007 |
| 0345 728 | BT | 10/04/2007 |
| 0345 729 | BT | 10/04/2007 |
| 0345 730 | BT | 10/04/2007 |
| 0345 731 | BT | 10/04/2007 |
| 0345 732 | BT | 10/04/2007 |
| 0345 733 | BT | 10/04/2007 |
| 0345 734 | BT | 10/04/2007 |
| 0345 735 | BT | 10/04/2007 |
| 0345 736 | BT | 10/04/2007 |
| 0345 737 | BT | 10/04/2007 |
| 0345 738 | BT | 10/04/2007 |
| 0345 739 | BT | 10/04/2007 |
| 0345 740 | BT | 10/04/2007 |
| 0345 741 | BT | 10/04/2007 |
| 0345 742 | BT | 10/04/2007 |
| 0345 743 | BT | 10/04/2007 |
| 0345 744 | BT | 10/04/2007 |
| 0345 745 | BT | 10/04/2007 |
| 0345 746 | BT | 10/04/2007 |
| 0345 747 | BT | 10/04/2007 |
| 0345 748 | BT | 10/04/2007 |
| 0345 749 | BT | 10/04/2007 |
| 0345 750 | BT | 10/04/2007 |
| 0345 751 | BT | 10/04/2007 |
| 0345 752 | BT | 10/04/2007 |
| 0345 753 | BT | 10/04/2007 |
| 0345 754 | BT | 10/04/2007 |
| 0345 755 | BT | 10/04/2007 |
| 0345 756 | BT | 10/04/2007 |
| 0345 757 | BT | 10/04/2007 |
| 0345 758 | BT | 10/04/2007 |
| 0345 759 | BT | 10/04/2007 |
| 0345 760 | BT | 10/04/2007 |
| 0345 761 | BT | 10/04/2007 |
| 0345 762 | BT | 10/04/2007 |
| 0345 763 | BT | 10/04/2007 |
| 0345 764 | BT | 10/04/2007 |
| 0345 765 | BT | 10/04/2007 |
| 0345 766 | BT | 10/04/2007 |
| 0345 767 | BT | 10/04/2007 |
| 0345 768 | BT | 10/04/2007 |
| 0345 769 | BT | 10/04/2007 |
| 0345 770 | BT | 10/04/2007 |
| 0345 771 | BT | 10/04/2007 |
| 0345 772 | BT | 10/04/2007 |
| 0345 773 | BT | 10/04/2007 |
| 0345 774 | BT | 10/04/2007 |
| 0345 775 | BT | 10/04/2007 |
| 0345 776 | BT | 10/04/2007 |
| 0345 777 | BT | 10/04/2007 |
| 0345 778 | BT | 10/04/2007 |
| 0345 779 | BT | 10/04/2007 |
| 0345 780 | BT | 10/04/2007 |
| 0345 781 | BT | 10/04/2007 |
| 0345 782 | BT | 10/04/2007 |
| 0345 783 | BT | 10/04/2007 |
| 0345 784 | BT | 10/04/2007 |
| 0345 785 | BT | 10/04/2007 |
| 0345 786 | BT | 10/04/2007 |
| 0345 787 | BT | 10/04/2007 |
| 0345 788 | BT | 10/04/2007 |
| 0345 789 | BT | 10/04/2007 |
| 0345 790 | BT | 10/04/2007 |
| 0345 791 | BT | 10/04/2007 |
| 0345 792 | BT | 10/04/2007 |
| 0345 793 | BT | 10/04/2007 |
| 0345 794 | BT | 10/04/2007 |
| 0345 795 | BT | 10/04/2007 |
| 0345 796 | BT | 10/04/2007 |
| 0345 797 | BT | 10/04/2007 |
| 0345 798 | BT | 10/04/2007 |
| 0345 799 | BT | 10/04/2007 |
| 0345 800 | JT (Jersey) Limited | 26/08/2014 |
| 0345 803 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 805 | Magrathea Telecommunications Limited | 11/10/2010 |
| 0345 806 | TalkTalk Communications Limited | 13/01/2011 |
| 0345 807 | 24 Seven Communications Ltd | 16/06/2009 |
| 0345 809 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 810 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0345 811 | Syntec Limited | 19/06/2007 |
| 0345 812 | Admiral Telecom Limited | 09/11/2007 |
| 0345 815 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 818 | TalkTalk Communications Limited | 28/04/2014 |
| 0345 820 | Alphatalk Limited | 30/01/2014 |
| 0345 821 | Alphatalk Limited | 30/01/2014 |
| 0345 822 | Alphatalk Limited | 30/01/2014 |
| 0345 823 | Alphatalk Limited | 30/01/2014 |
| 0345 824 | Alphatalk Limited | 30/01/2014 |
| 0345 825 | Alphatalk Limited | 30/01/2014 |
| 0345 826 | Alphatalk Limited | 30/01/2014 |
| 0345 827 | Alphatalk Limited | 30/01/2014 |
| 0345 828 | Alphatalk Limited | 30/01/2014 |
| 0345 829 | Alphatalk Limited | 30/01/2014 |
| 0345 830 | Club Communications Ltd | 24/03/2016 |
| 0345 832 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 833 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 834 | Voxbone SA | 08/07/2021 |
| 0345 835 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 838 | Nexus Telecommunications Limited | 12/07/2007 |
| 0345 839 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 840 | Virgin Media Limited | 21/07/2008 |
| 0345 841 | Virgin Media Limited | 21/07/2008 |
| 0345 842 | Virgin Media Limited | 21/07/2008 |
| 0345 843 | Virgin Media Limited | 21/07/2008 |
| 0345 844 | Virgin Media Limited | 21/07/2008 |
| 0345 845 | Virgin Media Limited | 21/07/2008 |
| 0345 846 | Virgin Media Limited | 21/07/2008 |
| 0345 847 | Virgin Media Limited | 21/07/2008 |
| 0345 848 | Virgin Media Limited | 21/07/2008 |
| 0345 849 | Virgin Media Limited | 21/07/2008 |
| 0345 850 | BT | 10/04/2007 |
| 0345 851 | Buzz Networks Limited | 27/08/2008 |
| 0345 852 | FleXtel Limited | 10/04/2007 |
| 0345 853 | iHub 2 Limited | 20/06/2016 |
| 0345 854 | GCI Network Solutions Ltd | 20/04/2017 |
| 0345 855 | Buzz Networks Limited | 27/08/2008 |
| 0345 860 | FleXtel Limited | 10/04/2007 |
| 0345 862 | AQL Wholesale Ltd | 27/01/2015 |
| 0345 863 | TalkTalk Communications Limited | 14/07/2008 |
| 0345 864 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 867 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0345 868 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0345 869 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0345 871 | Dantec Enterprises Ltd | 25/09/2008 |
| 0345 872 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 873 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 877 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 878 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 880 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 881 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 882 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 883 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 884 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 885 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 886 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 887 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 888 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 889 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0345 890 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0345 891 | FleXtel Limited | 10/04/2007 |
| 0345 892 | FleXtel Limited | 10/04/2007 |
| 0345 894 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0345 898 | Telecoms World PLC | 14/10/2008 |
| 0345 899 | Maximus Communications Ltd | 05/06/2015 |
| 0345 900 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 901 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 902 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 903 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 904 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 905 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 906 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 907 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 908 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 909 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 910 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 911 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 912 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 913 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 914 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 915 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 916 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 917 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 918 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 919 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 920 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 921 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 922 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0345 923 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 924 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 925 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 926 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 927 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 928 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 929 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 930 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 931 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 932 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 933 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 934 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 935 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 936 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 937 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 938 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 939 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 940 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 941 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 942 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 943 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 944 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 945 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 946 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 947 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 948 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 949 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 950 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 951 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 952 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 953 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 954 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 955 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 956 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 957 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 958 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 959 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 960 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 961 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 962 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 963 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 964 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 965 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 966 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 967 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 968 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 969 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 970 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 971 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 972 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 973 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 974 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 975 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 976 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 977 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 978 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 979 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 980 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 981 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 982 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 983 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 984 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 985 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 986 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 987 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 988 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 989 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 990 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 991 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 992 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 993 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 994 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 995 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 996 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 997 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 998 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0345 999 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 000 | Lumen Technologies UK Limited | 10/04/2007 |
| 0370 001 | Lumen Technologies UK Limited | 10/04/2007 |
| 0370 005 | IV Response Limited | 23/05/2007 |
| 0370 010 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 011 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 012 | Virgin Media Limited | 23/01/2008 |
| 0370 013 | Virgin Media Limited | 18/07/2008 |
| 0370 015 | Virgin Media Limited | 21/07/2008 |
| 0370 016 | Virgin Media Limited | 21/07/2008 |
| 0370 017 | Redcentric Solutions Limited | 26/05/2016 |
| 0370 020 | GCI Network Solutions Ltd | 20/04/2017 |
| 0370 024 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 025 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 026 | Orange Business Holdings UK Limited | 26/02/2013 |
| 0370 027 | Syntec Limited | 19/06/2007 |
| 0370 029 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 032 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 033 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 034 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 035 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 038 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 040 | Virgin Media Limited | 21/07/2008 |
| 0370 041 | Swiftnet Ltd | 04/09/2007 |
| 0370 042 | Telecoms World PLC | 05/10/2007 |
| 0370 043 | Virgin Media Limited | 08/04/2016 |
| 0370 044 | Admiral Telecom Limited | 09/11/2007 |
| 0370 046 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0370 047 | Citrus Telecommunications Ltd | 08/11/2013 |
| 0370 048 | Verizon UK Limited | 17/04/2007 |
| 0370 049 | Verizon UK Limited | 17/04/2007 |
| 0370 050 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 051 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 052 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 053 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 054 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 055 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 056 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 058 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 060 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 061 | Alphatalk Limited | 25/03/2009 |
| 0370 062 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0370 063 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0370 064 | TelXL Ltd | 03/04/2014 |
| 0370 065 | Content Guru Limited | 28/04/2014 |
| 0370 066 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 067 | TelXL Ltd | 21/08/2008 |
| 0370 068 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0370 069 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 070 | Vodafone Limited | 13/08/2015 |
| 0370 071 | Vodafone Limited | 13/08/2015 |
| 0370 072 | Vodafone Limited | 13/08/2015 |
| 0370 073 | Vodafone Limited | 13/08/2015 |
| 0370 074 | Vodafone Limited | 13/08/2015 |
| 0370 075 | Vodafone Limited | 13/08/2015 |
| 0370 076 | Vodafone Limited | 13/08/2015 |
| 0370 077 | Vodafone Limited | 13/08/2015 |
| 0370 078 | Vodafone Limited | 13/08/2015 |
| 0370 079 | Vodafone Limited | 13/08/2015 |
| 0370 080 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 082 | Nexus Telecommunications Limited | 12/07/2007 |
| 0370 084 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 085 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 086 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 087 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 088 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 090 | BT | 10/04/2007 |
| 0370 092 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0370 093 | 24 Seven Communications Ltd | 04/10/2011 |
| 0370 094 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 096 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 097 | Redcentric Solutions Limited | 26/05/2016 |
| 0370 099 | Colt Technology Services | 25/04/2007 |
| 0370 101 | Digital Space Group Limited | 29/02/2016 |
| 0370 102 | Digital Space Group Limited | 29/02/2016 |
| 0370 103 | Digital Space Group Limited | 29/02/2016 |
| 0370 104 | Digital Space Group Limited | 29/02/2016 |
| 0370 105 | Digital Space Group Limited | 29/02/2016 |
| 0370 106 | Digital Space Group Limited | 29/02/2016 |
| 0370 107 | Digital Space Group Limited | 29/02/2016 |
| 0370 108 | Digital Space Group Limited | 29/02/2016 |
| 0370 109 | Digital Space Group Limited | 29/02/2016 |
| 0370 110 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 111 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 112 | TalkTalk Communications Limited | 14/07/2008 |
| 0370 114 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 116 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0370 118 | Pulsant (Scotland) Limited | 10/08/2015 |
| 0370 120 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 121 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 122 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 123 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 124 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 125 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 126 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 127 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 128 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 129 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 130 | Colt Technology Services | 25/04/2007 |
| 0370 131 | Colt Technology Services | 25/04/2007 |
| 0370 132 | Colt Technology Services | 25/04/2007 |
| 0370 133 | Colt Technology Services | 25/04/2007 |
| 0370 134 | Colt Technology Services | 24/04/2007 |
| 0370 135 | Colt Technology Services | 24/04/2007 |
| 0370 136 | Colt Technology Services | 24/04/2007 |
| 0370 137 | Colt Technology Services | 24/04/2007 |
| 0370 138 | Colt Technology Services | 24/04/2007 |
| 0370 139 | Colt Technology Services | 24/04/2007 |
| 0370 140 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 141 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 142 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 143 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 145 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 146 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 147 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 148 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 149 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 150 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 151 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 152 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 153 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 154 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 155 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 156 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 157 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 158 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 159 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 160 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 161 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 162 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 163 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 164 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 165 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 166 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 167 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 168 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 169 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 170 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 175 | Telecom2 Limited | 22/10/2009 |
| 0370 176 | DRD Communications Limited | 26/07/2016 |
| 0370 178 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 179 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 182 | Magrathea Telecommunications Limited | 24/02/2014 |
| 0370 183 | Gamma Telecom Holdings Ltd | 17/07/2013 |
| 0370 184 | Nextec UK Limited | 12/05/2016 |
| 0370 186 | Core Telecom Limited | 19/02/2014 |
| 0370 188 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0370 190 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 191 | BT | 10/04/2007 |
| 0370 192 | BT | 10/04/2007 |
| 0370 194 | BT | 10/04/2007 |
| 0370 195 | BT | 10/04/2007 |
| 0370 196 | Virgin Media Limited | 18/07/2008 |
| 0370 197 | BT | 10/04/2007 |
| 0370 198 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0370 199 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0370 200 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 201 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 202 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 203 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 204 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 205 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 206 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 207 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 208 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 209 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 210 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0370 211 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0370 212 | Hospedia Limited | 07/09/2009 |
| 0370 213 | Numbers Telecom Limited | 11/02/2016 |
| 0370 214 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 218 | Core Telecom Limited | 25/11/2011 |
| 0370 220 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 222 | Colt Technology Services | 19/08/2015 |
| 0370 223 | Sky UK Limited | 11/12/2013 |
| 0370 224 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 225 | GCI Network Solutions Ltd | 20/04/2017 |
| 0370 226 | Business Broadcast Communications Limited | 05/11/2009 |
| 0370 231 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 232 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 233 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0370 234 | Virgin Media Limited | 08/04/2016 |
| 0370 235 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0370 236 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0370 237 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 238 | BT | 10/04/2007 |
| 0370 239 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 240 | BT | 10/04/2007 |
| 0370 241 | BT | 10/04/2007 |
| 0370 242 | BT | 10/04/2007 |
| 0370 243 | BT | 10/04/2007 |
| 0370 245 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0370 246 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 247 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 248 | Telecom2 Limited | 22/10/2009 |
| 0370 249 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 251 | Redcentric Solutions Limited | 26/05/2016 |
| 0370 252 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 259 | 24 Seven Communications Ltd | 04/10/2011 |
| 0370 262 | Premier Voicemail Ltd | 23/10/2014 |
| 0370 263 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 264 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 266 | BT | 10/04/2007 |
| 0370 267 | Lumen Technologies UK Limited | 10/04/2007 |
| 0370 268 | Lumen Technologies UK Limited | 10/04/2007 |
| 0370 269 | 24 Seven Communications Ltd | 16/06/2009 |
| 0370 270 | Virgin Media Limited | 18/07/2008 |
| 0370 271 | Virgin Media Limited | 21/07/2008 |
| 0370 272 | Virgin Media Limited | 21/07/2008 |
| 0370 273 | Virgin Media Limited | 21/07/2008 |
| 0370 274 | Virgin Media Limited | 14/05/2008 |
| 0370 275 | Virgin Media Limited | 21/07/2008 |
| 0370 276 | Virgin Media Limited | 21/07/2008 |
| 0370 277 | Virgin Media Limited | 21/07/2008 |
| 0370 278 | Virgin Media Limited | 21/07/2008 |
| 0370 279 | Virgin Media Limited | 21/07/2008 |
| 0370 282 | Virgin Media Limited | 21/07/2008 |
| 0370 283 | Virgin Media Limited | 21/07/2008 |
| 0370 284 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0370 285 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0370 286 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0370 288 | GCI Network Solutions Ltd | 01/06/2017 |
| 0370 290 | Virgin Media Limited | 21/07/2008 |
| 0370 291 | Virgin Media Limited | 21/07/2008 |
| 0370 292 | Virgin Media Limited | 21/07/2008 |
| 0370 293 | Virgin Media Limited | 21/07/2008 |
| 0370 294 | Virgin Media Limited | 21/07/2008 |
| 0370 295 | Magrathea Telecommunications Limited | 10/02/2012 |
| 0370 298 | Virgin Media Limited | 21/07/2008 |
| 0370 300 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 301 | Alphatalk Limited | 30/01/2014 |
| 0370 302 | Alphatalk Limited | 30/01/2014 |
| 0370 303 | Alphatalk Limited | 30/01/2014 |
| 0370 304 | Alphatalk Limited | 30/01/2014 |
| 0370 305 | Alphatalk Limited | 30/01/2014 |
| 0370 306 | Alphatalk Limited | 30/01/2014 |
| 0370 307 | Alphatalk Limited | 30/01/2014 |
| 0370 308 | Alphatalk Limited | 30/01/2014 |
| 0370 309 | Alphatalk Limited | 30/01/2014 |
| 0370 310 | Alphatalk Limited | 30/01/2014 |
| 0370 312 | FleXtel Limited | 10/04/2007 |
| 0370 314 | FleXtel Limited | 10/04/2007 |
| 0370 315 | FleXtel Limited | 10/04/2007 |
| 0370 316 | FleXtel Limited | 10/04/2007 |
| 0370 319 | Dantec Enterprises Ltd | 25/09/2008 |
| 0370 320 | Virgin Media Limited | 08/04/2016 |
| 0370 321 | FleXtel Limited | 10/04/2007 |
| 0370 323 | Virgin Media Limited | 08/04/2016 |
| 0370 324 | Colt Technology Services | 24/04/2007 |
| 0370 325 | Virgin Media Limited | 08/04/2016 |
| 0370 330 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 331 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 333 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 334 | Citrus Telecommunications Ltd | 06/07/2007 |
| 0370 335 | IV Response Limited | 23/05/2007 |
| 0370 336 | BT | 10/04/2007 |
| 0370 343 | Spitfire Network Services Limited | 22/09/2015 |
| 0370 344 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 345 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0370 350 | Windsor Telecom Ltd | 04/09/2007 |
| 0370 351 | Colt Technology Services | 24/04/2007 |
| 0370 352 | Colt Technology Services | 24/04/2007 |
| 0370 353 | Colt Technology Services | 24/04/2007 |
| 0370 357 | Virgin Media Limited | 21/07/2008 |
| 0370 359 | Dynamic Mobile Billing Limited | 04/01/2008 |
| 0370 360 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 361 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0370 365 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 366 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 368 | TTNC Limited | 01/10/2013 |
| 0370 369 | TTNC Limited | 01/10/2013 |
| 0370 376 | Verizon UK Limited | 17/04/2007 |
| 0370 380 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 381 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0370 382 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 383 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0370 385 | Vodafone Ltd (C&W) | 18/06/2013 |
| 0370 386 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 387 | Barritel Limited | 10/04/2007 |
| 0370 389 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 390 | Virgin Media Limited | 21/07/2008 |
| 0370 392 | Magrathea Telecommunications Limited | 10/02/2012 |
| 0370 393 | Virgin Media Limited | 21/07/2008 |
| 0370 396 | Virgin Media Limited | 21/07/2008 |
| 0370 397 | Magrathea Telecommunications Limited | 24/02/2014 |
| 0370 398 | Virgin Media Limited | 23/07/2008 |
| 0370 399 | Virgin Media Limited | 23/07/2008 |
| 0370 400 | BT | 10/04/2007 |
| 0370 401 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 402 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 403 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 404 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 405 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 406 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 408 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0370 410 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 411 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 412 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 413 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 414 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 415 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 416 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 417 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 418 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 419 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 420 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 421 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 422 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 423 | TalkTalk Communications Limited | 15/10/2013 |
| 0370 424 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 425 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 426 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 427 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 428 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 429 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 430 | Nexus Telecommunications Limited | 12/07/2007 |
| 0370 432 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 435 | Resilient PLC | 04/06/2007 |
| 0370 436 | Suretec Systems Ltd | 05/06/2015 |
| 0370 437 | QX Telecom Ltd | 30/11/2007 |
| 0370 438 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 440 | 24 Seven Communications Ltd | 20/10/2010 |
| 0370 442 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 443 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 444 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 446 | Digital Mail Limited | 28/04/2008 |
| 0370 448 | Inet Telecoms Ltd (Voipfone) | 17/12/2013 |
| 0370 458 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 460 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 464 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 465 | Gamma Telecom Holdings Ltd | 25/03/2014 |
| 0370 468 | TTNC Limited | 01/10/2013 |
| 0370 471 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0370 472 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 474 | Barritel Limited | 10/04/2007 |
| 0370 477 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0370 478 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0370 479 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0370 481 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 484 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 486 | GCI Network Solutions Ltd | 01/06/2017 |
| 0370 487 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 490 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0370 495 | Magrathea Telecommunications Limited | 10/02/2012 |
| 0370 496 | Lumen Technologies UK Limited | 10/04/2007 |
| 0370 500 | BT | 10/04/2007 |
| 0370 501 | BT | 10/04/2007 |
| 0370 502 | BT | 10/04/2007 |
| 0370 503 | BT | 10/04/2007 |
| 0370 504 | BT | 10/04/2007 |
| 0370 505 | BT | 10/04/2007 |
| 0370 506 | BT | 10/04/2007 |
| 0370 507 | BT | 10/04/2007 |
| 0370 508 | BT | 10/04/2007 |
| 0370 509 | BT | 10/04/2007 |
| 0370 510 | BT | 10/04/2007 |
| 0370 511 | BT | 10/04/2007 |
| 0370 512 | BT | 10/04/2007 |
| 0370 513 | BT | 10/04/2007 |
| 0370 514 | BT | 10/04/2007 |
| 0370 515 | BT | 10/04/2007 |
| 0370 516 | BT | 10/04/2007 |
| 0370 517 | BT | 10/04/2007 |
| 0370 518 | BT | 10/04/2007 |
| 0370 519 | BT | 10/04/2007 |
| 0370 520 | BT | 10/04/2007 |
| 0370 521 | BT | 10/04/2007 |
| 0370 522 | BT | 10/04/2007 |
| 0370 523 | BT | 10/04/2007 |
| 0370 524 | BT | 10/04/2007 |
| 0370 525 | BT | 10/04/2007 |
| 0370 526 | BT | 10/04/2007 |
| 0370 527 | BT | 10/04/2007 |
| 0370 528 | BT | 10/04/2007 |
| 0370 529 | BT | 10/04/2007 |
| 0370 530 | BT | 10/04/2007 |
| 0370 531 | BT | 10/04/2007 |
| 0370 532 | BT | 10/04/2007 |
| 0370 533 | BT | 10/04/2007 |
| 0370 534 | BT | 10/04/2007 |
| 0370 535 | BT | 10/04/2007 |
| 0370 536 | BT | 10/04/2007 |
| 0370 537 | BT | 10/04/2007 |
| 0370 538 | BT | 10/04/2007 |
| 0370 539 | BT | 10/04/2007 |
| 0370 540 | BT | 10/04/2007 |
| 0370 541 | BT | 10/04/2007 |
| 0370 542 | BT | 10/04/2007 |
| 0370 543 | BT | 10/04/2007 |
| 0370 544 | BT | 10/04/2007 |
| 0370 545 | BT | 10/04/2007 |
| 0370 546 | BT | 10/04/2007 |
| 0370 547 | BT | 10/04/2007 |
| 0370 548 | BT | 10/04/2007 |
| 0370 549 | BT | 10/04/2007 |
| 0370 550 | BT | 10/04/2007 |
| 0370 551 | BT | 10/04/2007 |
| 0370 552 | BT | 10/04/2007 |
| 0370 553 | BT | 10/04/2007 |
| 0370 554 | BT | 10/04/2007 |
| 0370 555 | BT | 10/04/2007 |
| 0370 556 | BT | 10/04/2007 |
| 0370 557 | BT | 10/04/2007 |
| 0370 558 | BT | 10/04/2007 |
| 0370 559 | BT | 10/04/2007 |
| 0370 560 | BT | 10/04/2007 |
| 0370 561 | BT | 10/04/2007 |
| 0370 562 | BT | 10/04/2007 |
| 0370 563 | BT | 10/04/2007 |
| 0370 564 | BT | 10/04/2007 |
| 0370 565 | BT | 10/04/2007 |
| 0370 566 | BT | 10/04/2007 |
| 0370 567 | BT | 10/04/2007 |
| 0370 568 | BT | 10/04/2007 |
| 0370 569 | BT | 10/04/2007 |
| 0370 570 | BT | 10/04/2007 |
| 0370 571 | BT | 10/04/2007 |
| 0370 572 | BT | 10/04/2007 |
| 0370 573 | BT | 10/04/2007 |
| 0370 574 | BT | 10/04/2007 |
| 0370 575 | BT | 10/04/2007 |
| 0370 576 | BT | 10/04/2007 |
| 0370 577 | BT | 10/04/2007 |
| 0370 578 | BT | 10/04/2007 |
| 0370 579 | BT | 10/04/2007 |
| 0370 580 | BT | 10/04/2007 |
| 0370 581 | BT | 10/04/2007 |
| 0370 582 | BT | 10/04/2007 |
| 0370 583 | BT | 10/04/2007 |
| 0370 584 | BT | 10/04/2007 |
| 0370 585 | BT | 10/04/2007 |
| 0370 586 | BT | 10/04/2007 |
| 0370 587 | BT | 10/04/2007 |
| 0370 588 | BT | 10/04/2007 |
| 0370 589 | BT | 10/04/2007 |
| 0370 590 | BT | 10/04/2007 |
| 0370 591 | BT | 10/04/2007 |
| 0370 592 | BT | 10/04/2007 |
| 0370 593 | BT | 10/04/2007 |
| 0370 594 | BT | 10/04/2007 |
| 0370 595 | BT | 10/04/2007 |
| 0370 596 | BT | 10/04/2007 |
| 0370 597 | BT | 10/04/2007 |
| 0370 598 | BT | 10/04/2007 |
| 0370 599 | BT | 10/04/2007 |
| 0370 600 | BT | 10/04/2007 |
| 0370 601 | BT | 10/04/2007 |
| 0370 602 | BT | 10/04/2007 |
| 0370 603 | BT | 10/04/2007 |
| 0370 604 | BT | 10/04/2007 |
| 0370 605 | BT | 10/04/2007 |
| 0370 606 | BT | 10/04/2007 |
| 0370 607 | BT | 10/04/2007 |
| 0370 608 | BT | 10/04/2007 |
| 0370 609 | BT | 10/04/2007 |
| 0370 610 | Windsor Telecom Ltd | 13/06/2011 |
| 0370 611 | 24 Seven Communications Ltd | 16/06/2009 |
| 0370 612 | Square Systems Limited | 06/11/2008 |
| 0370 620 | Windsor Telecom Ltd | 30/03/2011 |
| 0370 621 | Number Solutions Ltd | 17/09/2007 |
| 0370 623 | TTNC Limited | 01/10/2013 |
| 0370 625 | Barritel Limited | 10/04/2007 |
| 0370 626 | Commi Holdings Limited | 17/11/2016 |
| 0370 642 | Dynamic Mobile Billing Limited | 19/10/2018 |
| 0370 646 | BT | 10/04/2007 |
| 0370 649 | Dynamic Mobile Billing Limited | 19/10/2018 |
| 0370 700 | Virgin Media Limited | 08/04/2016 |
| 0370 701 | Virgin Media Limited | 08/04/2016 |
| 0370 702 | Virgin Media Limited | 08/04/2016 |
| 0370 703 | Virgin Media Limited | 08/04/2016 |
| 0370 704 | Virgin Media Limited | 08/04/2016 |
| 0370 705 | Virgin Media Limited | 08/04/2016 |
| 0370 706 | Virgin Media Limited | 08/04/2016 |
| 0370 707 | Virgin Media Limited | 08/04/2016 |
| 0370 708 | Virgin Media Limited | 08/04/2016 |
| 0370 709 | Virgin Media Limited | 08/04/2016 |
| 0370 710 | Vodafone Ltd (C&W) | 28/07/2014 |
| 0370 711 | Vodafone Ltd (C&W) | 28/07/2014 |
| 0370 712 | Vodafone Ltd (C&W) | 28/07/2014 |
| 0370 713 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 714 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 716 | TelXL Ltd | 21/08/2008 |
| 0370 720 | Daisy Communications Ltd | 13/12/2010 |
| 0370 721 | Daisy Communications Ltd | 13/12/2010 |
| 0370 722 | Daisy Communications Ltd | 13/12/2010 |
| 0370 723 | Daisy Communications Ltd | 13/12/2010 |
| 0370 724 | Daisy Communications Ltd | 13/12/2010 |
| 0370 725 | Daisy Communications Ltd | 13/12/2010 |
| 0370 726 | Daisy Communications Ltd | 13/12/2010 |
| 0370 727 | Daisy Communications Ltd | 13/12/2010 |
| 0370 728 | Daisy Communications Ltd | 13/12/2010 |
| 0370 729 | Daisy Communications Ltd | 13/12/2010 |
| 0370 730 | Colt Technology Services | 24/04/2007 |
| 0370 731 | Colt Technology Services | 24/04/2007 |
| 0370 732 | Colt Technology Services | 24/04/2007 |
| 0370 733 | Colt Technology Services | 24/04/2007 |
| 0370 734 | Colt Technology Services | 24/04/2007 |
| 0370 735 | Colt Technology Services | 24/04/2007 |
| 0370 736 | Colt Technology Services | 24/04/2007 |
| 0370 737 | Colt Technology Services | 24/04/2007 |
| 0370 738 | Colt Technology Services | 24/04/2007 |
| 0370 739 | Colt Technology Services | 24/04/2007 |
| 0370 740 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 741 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 742 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 743 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 744 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 745 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 746 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 747 | TalkTalk Communications Limited | 25/09/2008 |
| 0370 748 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 749 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 750 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 751 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 752 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 753 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 754 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 755 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 756 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 757 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 758 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 759 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 760 | Vodafone Ltd (C&W) | 13/08/2015 |
| 0370 761 | Colt Technology Services | 24/04/2007 |
| 0370 763 | Colt Technology Services | 24/04/2007 |
| 0370 765 | FleXtel Limited | 10/04/2007 |
| 0370 766 | Nexus Telecommunications Limited | 09/09/2008 |
| 0370 767 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 769 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 770 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 771 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 774 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 775 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 776 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 777 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 778 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 779 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 780 | Buzz Networks Limited | 27/08/2008 |
| 0370 781 | Buzz Networks Limited | 27/08/2008 |
| 0370 785 | Lumen Technologies UK Limited | 10/04/2007 |
| 0370 787 | TalkTalk Communications Limited | 15/10/2013 |
| 0370 789 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0370 794 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 800 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0370 801 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0370 803 | Nexus Telecommunications Limited | 12/07/2007 |
| 0370 804 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0370 805 | Nexus Telecommunications Limited | 12/07/2007 |
| 0370 808 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 811 | Syntec Limited | 19/06/2007 |
| 0370 812 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 814 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 815 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 818 | Colt Technology Services | 24/04/2007 |
| 0370 820 | Voxbone SA | 08/07/2021 |
| 0370 821 | Served Up Limited | 14/10/2008 |
| 0370 823 | Telecoms World Direct Ltd | 20/11/2008 |
| 0370 825 | Barritel Limited | 10/04/2007 |
| 0370 828 | Redwood Technologies Ltd | 20/11/2018 |
| 0370 829 | Nodemax Limited | 08/07/2008 |
| 0370 830 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 831 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 832 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 833 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 834 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 835 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 836 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 837 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 838 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 839 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0370 840 | Virgin Media Limited | 23/07/2008 |
| 0370 841 | Virgin Media Limited | 23/07/2008 |
| 0370 842 | Virgin Media Limited | 23/07/2008 |
| 0370 843 | Virgin Media Limited | 23/07/2008 |
| 0370 844 | Virgin Media Limited | 23/07/2008 |
| 0370 845 | Virgin Media Limited | 23/07/2008 |
| 0370 846 | Virgin Media Limited | 23/07/2008 |
| 0370 847 | Virgin Media Limited | 23/07/2008 |
| 0370 848 | Virgin Media Limited | 23/07/2008 |
| 0370 849 | Virgin Media Limited | 23/07/2008 |
| 0370 850 | BT | 10/04/2007 |
| 0370 851 | BT | 10/04/2007 |
| 0370 853 | Virgin Media Limited | 08/04/2016 |
| 0370 855 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0370 857 | Magrathea Telecommunications Limited | 06/07/2015 |
| 0370 860 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 863 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 864 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 866 | FleXtel Limited | 10/04/2007 |
| 0370 869 | Virgin Media Limited | 23/07/2008 |
| 0370 870 | Verizon UK Limited | 17/04/2007 |
| 0370 871 | Verizon UK Limited | 17/04/2007 |
| 0370 872 | Verizon UK Limited | 17/04/2007 |
| 0370 873 | Verizon UK Limited | 17/04/2007 |
| 0370 874 | FleXtel Limited | 10/04/2007 |
| 0370 875 | Magrathea Telecommunications Limited | 10/02/2012 |
| 0370 876 | Eircom (UK) Limited | 26/06/2007 |
| 0370 879 | FleXtel Limited | 10/04/2007 |
| 0370 880 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 881 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 887 | Virgin Media Limited | 08/04/2016 |
| 0370 888 | Virgin Media Limited | 08/04/2016 |
| 0370 889 | Virgin Media Limited | 08/04/2016 |
| 0370 890 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 891 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 892 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 893 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 894 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 895 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 896 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 897 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 898 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0370 899 | SKD 4 Limited | 08/04/2020 |
| 0370 900 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 901 | Vodafone Ltd (C&W) | 17/09/2013 |
| 0370 902 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 903 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 904 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 905 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 906 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 907 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 908 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 909 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0370 911 | BT | 03/06/2010 |
| 0370 912 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 913 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 915 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 916 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 917 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 918 | Sports Tel Ltd | 15/11/2010 |
| 0370 920 | Verizon UK Limited | 17/04/2007 |
| 0370 921 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 922 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 925 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 926 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 927 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 928 | Vodafone Ltd (C&W) | 14/10/2015 |
| 0370 933 | Barritel Limited | 10/12/2015 |
| 0370 934 | Gamma Telecom Holdings Ltd | 20/02/2008 |
| 0370 935 | Daisy Communications Ltd | 30/04/2014 |
| 0370 937 | Solutios Limited | 06/10/2008 |
| 0370 942 | Call Stream Limited | 30/06/2014 |
| 0370 944 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 947 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0370 948 | GCI Network Solutions Ltd | 03/05/2017 |
| 0370 949 | FleXtel Limited | 10/04/2007 |
| 0370 950 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 951 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0370 953 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0370 956 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0370 958 | Digital Space Group Limited | 28/09/2007 |
| 0370 961 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0370 974 | Magrathea Telecommunications Limited | 08/11/2007 |
| 0370 975 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 977 | Invade International Ltd | 13/01/2016 |
| 0370 978 | Barritel Limited | 10/04/2007 |
| 0370 979 | Gamma Telecom Holdings Ltd | 17/07/2013 |
| 0370 980 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 981 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 982 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 983 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 984 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 985 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 986 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 987 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 988 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 989 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 990 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 991 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 992 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 993 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 994 | TalkTalk Communications Limited | 11/07/2008 |
| 0370 996 | TalkTalk Communications Limited | 28/04/2014 |
| 0370 997 | Maximus Communications Ltd | 05/06/2015 |
| 0370 998 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 043 3 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 050 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0371 056 3 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 091 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0371 097 1 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 098 1 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 200 | BT | 01/07/2008 |
| 0371 202 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 204 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0371 208 | SKD 4 Limited | 08/04/2020 |
| 0371 210 | Daisy Communications Ltd | 30/04/2014 |
| 0371 211 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 214 | Redcentric Solutions Limited | 26/05/2016 |
| 0371 217 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 218 | Digital Mail Limited | 11/05/2016 |
| 0371 220 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 221 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 222 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 223 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 224 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 225 | Virgin Media Limited | 28/03/2012 |
| 0371 226 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 230 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 231 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 232 | Verizon UK Limited | 17/04/2007 |
| 0371 233 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0371 234 | FleXtel Limited | 10/04/2007 |
| 0371 235 | DRD Communications Limited | 26/07/2016 |
| 0371 236 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0371 237 | FleXtel Limited | 10/04/2007 |
| 0371 239 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 242 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 243 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 244 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 245 | FleXtel Limited | 10/04/2007 |
| 0371 246 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 247 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 248 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 249 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0371 250 | Windsor Telecom Ltd | 04/09/2007 |
| 0371 251 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 252 | Gamma Telecom Holdings Ltd | 17/11/2016 |
| 0371 253 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 254 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 256 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 257 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 258 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 259 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 261 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 263 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 264 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 265 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 266 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0371 271 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 272 | Daisy Communications Ltd | 30/04/2014 |
| 0371 275 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 276 | TTNC Limited | 20/04/2015 |
| 0371 277 | Colt Technology Services | 24/04/2007 |
| 0371 288 | Nexus Telecommunications Limited | 12/07/2007 |
| 0371 292 | Virgin Media Limited | 28/03/2012 |
| 0371 294 | Syntec Limited | 19/06/2007 |
| 0371 297 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 299 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 300 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0371 302 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 309 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 310 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 311 | Barritel Limited | 10/12/2015 |
| 0371 314 | Daisy Communications Ltd | 30/04/2014 |
| 0371 315 | FleXtel Limited | 10/04/2007 |
| 0371 320 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 321 | SKD 4 Limited | 08/04/2020 |
| 0371 326 | 24 Seven Communications Ltd | 06/07/2012 |
| 0371 327 | TelXL Ltd | 03/04/2014 |
| 0371 330 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 332 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 334 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 336 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 341 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 345 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 346 | Core Telecom Limited | 19/02/2014 |
| 0371 351 | BT | 01/07/2008 |
| 0371 356 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 359 | Digital Mail Limited | 11/05/2016 |
| 0371 360 | Virgin Media Limited | 28/03/2012 |
| 0371 362 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 365 | Syntec Limited | 19/06/2007 |
| 0371 369 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 372 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 375 | Syntec Limited | 19/06/2007 |
| 0371 376 | BT | 01/07/2008 |
| 0371 378 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 382 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0371 383 | Syntec Limited | 19/06/2007 |
| 0371 384 | BT | 01/07/2008 |
| 0371 386 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 391 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0371 394 | 24 Seven Communications Ltd | 06/07/2012 |
| 0371 395 | TTNC Limited | 01/10/2013 |
| 0371 397 | Virgin Media Limited | 08/04/2016 |
| 0371 399 | SKD 4 Limited | 08/04/2020 |
| 0371 400 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0371 401 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0371 402 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 408 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 410 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 411 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 423 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 424 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 425 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0371 426 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 429 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 431 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0371 432 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0371 433 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0371 434 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 438 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 451 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 453 | Core Telecom Limited | 19/02/2014 |
| 0371 454 | Core Telecom Limited | 19/02/2014 |
| 0371 455 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 460 | Redcentric Solutions Limited | 26/05/2016 |
| 0371 462 | SKD 4 Limited | 08/04/2020 |
| 0371 464 | Barritel Limited | 06/12/2010 |
| 0371 466 | 24 Seven Communications Ltd | 06/07/2012 |
| 0371 467 | Virgin Media Limited | 08/04/2016 |
| 0371 468 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 469 | TTNC Limited | 01/10/2013 |
| 0371 470 | Redcentric Solutions Limited | 26/05/2016 |
| 0371 471 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 472 | Virgin Media Limited | 08/04/2016 |
| 0371 474 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 477 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0371 481 | Virgin Media Limited | 08/04/2016 |
| 0371 483 | 24 Seven Communications Ltd | 06/07/2012 |
| 0371 484 | TTNC Limited | 01/10/2013 |
| 0371 485 | Virgin Media Limited | 08/04/2016 |
| 0371 488 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0371 489 | Core Telecom Limited | 19/02/2014 |
| 0371 490 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0371 495 | Virgin Media Limited | 08/04/2016 |
| 0371 496 | TTNC Limited | 01/10/2013 |
| 0371 499 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0371 503 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 504 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 508 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 510 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 512 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 516 | Redcentric Solutions Limited | 26/05/2016 |
| 0371 521 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 522 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 523 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 524 | 24 Seven Communications Ltd | 05/05/2010 |
| 0371 526 | Core Telecom Limited | 19/02/2014 |
| 0371 527 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 528 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 531 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 540 | Virgin Media Limited | 28/03/2012 |
| 0371 542 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 544 | Core Telecom Limited | 19/02/2014 |
| 0371 548 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 550 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0371 552 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 555 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 559 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0371 560 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 564 | TTNC Limited | 01/10/2013 |
| 0371 565 | Gamma Telecom Holdings Ltd | 25/03/2014 |
| 0371 566 | Commi Holdings Limited | 17/11/2016 |
| 0371 568 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 569 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0371 570 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 571 | Daisy Communications Ltd | 30/04/2014 |
| 0371 573 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 574 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 575 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0371 579 | Colt Technology Services | 24/04/2007 |
| 0371 581 | BT | 03/06/2010 |
| 0371 584 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 590 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 593 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0371 594 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0371 595 | TTNC Limited | 01/10/2013 |
| 0371 597 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0371 598 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0371 600 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0371 604 | Digital Mail Limited | 11/05/2016 |
| 0371 618 | Digital Mail Limited | 11/05/2016 |
| 0371 620 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 621 | TelXL Ltd | 03/04/2014 |
| 0371 622 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 623 | Core Telecom Limited | 19/02/2014 |
| 0371 625 | 24 Seven Communications Ltd | 06/07/2012 |
| 0371 626 | BT | 03/06/2010 |
| 0371 628 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 636 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 639 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 640 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 641 | BT | 01/07/2008 |
| 0371 644 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 645 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 649 | Core Telecom Limited | 19/02/2014 |
| 0371 650 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 652 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 658 | Digital Space Group Limited | 28/09/2007 |
| 0371 660 | Barritel Limited | 10/04/2007 |
| 0371 663 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 664 | BT | 01/07/2008 |
| 0371 666 | Syntec Limited | 19/06/2007 |
| 0371 671 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 673 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 674 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 677 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 680 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 683 | Core Telecom Limited | 19/02/2014 |
| 0371 687 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 688 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 690 | 24 Seven Communications Ltd | 06/07/2012 |
| 0371 693 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 699 | Call Stream Limited | 30/06/2014 |
| 0371 700 | Virgin Media Limited | 08/04/2016 |
| 0371 702 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 703 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 704 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 705 | Core Telecom Limited | 19/02/2014 |
| 0371 711 | GCI Network Solutions Ltd | 20/04/2017 |
| 0371 712 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 713 | TelXL Ltd | 03/04/2014 |
| 0371 714 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 715 | Vodafone Ltd (C&W) | 11/08/2014 |
| 0371 716 | TelXL Ltd | 03/04/2014 |
| 0371 717 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 719 | TelXL Ltd | 03/04/2014 |
| 0371 720 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 721 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 722 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 723 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 724 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 725 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 726 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 727 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 728 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 729 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 730 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 731 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 732 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 733 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 734 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 737 | Barritec Limited | 07/03/2013 |
| 0371 740 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 741 | Virgin Media Limited | 08/04/2016 |
| 0371 744 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 746 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 747 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 750 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 751 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 760 | Virgin Media Limited | 08/04/2016 |
| 0371 762 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 766 | TalkTalk Communications Limited | 11/07/2008 |
| 0371 767 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 770 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 775 | Digital Mail Limited | 11/05/2016 |
| 0371 781 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 782 | Redcentric Solutions Limited | 26/05/2016 |
| 0371 784 | Gamma Telecom Holdings Ltd | 17/07/2013 |
| 0371 789 | Telecoms World PLC | 05/10/2007 |
| 0371 792 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 800 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0371 801 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 803 | Virgin Media Limited | 28/03/2012 |
| 0371 806 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 807 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 810 | Virgin Media Limited | 08/04/2016 |
| 0371 811 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 813 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 823 | Core Telecom Limited | 19/02/2014 |
| 0371 826 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0371 827 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 831 | Verizon UK Limited | 17/04/2007 |
| 0371 834 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 836 | Core Telecom Limited | 19/02/2014 |
| 0371 837 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 840 | Verizon UK Limited | 17/04/2007 |
| 0371 841 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 842 | Core Telecom Limited | 19/02/2014 |
| 0371 843 | Lumen Technologies UK Limited | 10/04/2007 |
| 0371 850 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0371 853 | Virgin Media Limited | 28/03/2012 |
| 0371 855 | Syntec Limited | 19/06/2007 |
| 0371 862 | Redcentric Solutions Limited | 26/05/2016 |
| 0371 864 | Core Telecom Limited | 19/02/2014 |
| 0371 865 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 867 | Verizon UK Limited | 17/04/2007 |
| 0371 871 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 872 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 873 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 875 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0371 876 | Windsor Telecom Ltd | 30/03/2011 |
| 0371 880 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 882 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 884 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 889 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0371 890 | Commi Holdings Limited | 17/11/2016 |
| 0371 894 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 895 | BT | 01/07/2008 |
| 0371 898 | Commi Holdings Limited | 17/11/2016 |
| 0371 899 | Commi Holdings Limited | 17/11/2016 |
| 0371 900 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 902 | Call Stream Limited | 13/01/2020 |
| 0371 903 | TTNC Limited | 01/10/2013 |
| 0371 908 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0371 910 | Numbergroup Utilities Ltd | 19/10/2010 |
| 0371 911 | Virgin Media Limited | 08/04/2016 |
| 0371 915 | FleXtel Limited | 10/04/2007 |
| 0371 920 | Verizon UK Limited | 17/04/2007 |
| 0371 923 | Core Telecom Limited | 19/02/2014 |
| 0371 926 | Citrus Telecommunications Ltd | 03/04/2018 |
| 0371 928 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 930 | Verizon UK Limited | 17/04/2007 |
| 0371 933 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0371 934 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0371 939 | Core Telecom Limited | 19/02/2014 |
| 0371 940 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 941 | Daisy Communications Ltd | 30/04/2014 |
| 0371 942 | TalkTalk Communications Limited | 14/07/2008 |
| 0371 943 | BT | 01/07/2008 |
| 0371 944 | 24 Seven Communications Ltd | 05/05/2010 |
| 0371 945 | Colt Technology Services | 24/04/2007 |
| 0371 946 | Colt Technology Services | 24/04/2007 |
| 0371 947 | Colt Technology Services | 24/04/2007 |
| 0371 948 | Colt Technology Services | 24/04/2007 |
| 0371 949 | Colt Technology Services | 24/04/2007 |
| 0371 950 | 24 Seven Communications Ltd | 05/05/2010 |
| 0371 951 | Core Telecom Limited | 19/02/2014 |
| 0371 952 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0371 953 | Core Telecom Limited | 19/02/2014 |
| 0371 955 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0371 956 | 24 Seven Communications Ltd | 05/05/2010 |
| 0371 960 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 961 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 962 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 963 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 964 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 965 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 966 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 967 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 968 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 969 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0371 971 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 973 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 974 | FleXtel Limited | 10/04/2007 |
| 0371 976 | Telecoms World PLC | 13/10/2008 |
| 0371 977 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 978 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 983 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 984 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0371 986 | 24 Seven Communications Ltd | 05/05/2010 |
| 0371 987 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0371 989 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0371 992 | TalkTalk Communications Limited | 28/04/2014 |
| 0371 995 | GCI Network Solutions Ltd | 03/05/2017 |
| 0371 996 | FleXtel Limited | 10/04/2007 |
| 0371 997 | Maximus Communications Ltd | 05/06/2015 |
| 0371 998 | Telecoms World PLC | 20/11/2008 |
| 0372 003 | TalkTalk Communications Limited | 28/04/2014 |
| 0372 010 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0372 011 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0372 012 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0372 024 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 032 | Daisy Communications Ltd | 30/04/2014 |
| 0372 036 | BT | 03/06/2010 |
| 0372 042 | BT | 03/06/2010 |
| 0372 044 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0372 050 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 051 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 052 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 056 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 059 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 061 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 069 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 073 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 074 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 079 | TalkTalk Communications Limited | 13/01/2011 |
| 0372 081 | TalkTalk Communications Limited | 13/01/2011 |
| 0372 083 | TalkTalk Communications Limited | 13/01/2011 |
| 0372 084 | TalkTalk Communications Limited | 13/01/2011 |
| 0372 086 | TalkTalk Communications Limited | 13/01/2011 |
| 0372 102 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0372 104 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0372 109 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 110 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 111 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 112 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 113 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 114 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 115 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 116 | Content Guru Limited | 23/04/2014 |
| 0372 117 | Content Guru Limited | 23/04/2014 |
| 0372 118 | Content Guru Limited | 23/04/2014 |
| 0372 119 | Content Guru Limited | 23/04/2014 |
| 0372 120 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 121 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 122 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 123 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 124 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 125 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 126 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 127 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 128 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 129 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0372 130 | Content Guru Limited | 23/04/2014 |
| 0372 133 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 142 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 144 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 145 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 148 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0372 150 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0372 151 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0372 152 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0372 153 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0372 154 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0372 155 | Sigma Voice Solutions Ltd | 07/03/2014 |
| 0372 156 | VoIP-Un Limited | 06/07/2017 |
| 0372 172 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0372 211 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 212 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 235 | Virgin Media Limited | 29/03/2012 |
| 0372 238 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0372 250 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 252 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 258 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 261 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0372 288 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 289 | GCI Network Solutions Ltd | 03/05/2017 |
| 0372 290 | Core Telecom Limited | 19/02/2014 |
| 0372 291 | Core Telecom Limited | 19/02/2014 |
| 0372 292 | Core Telecom Limited | 19/02/2014 |
| 0372 293 | Core Telecom Limited | 19/02/2014 |
| 0372 294 | Core Telecom Limited | 19/02/2014 |
| 0372 295 | Core Telecom Limited | 19/02/2014 |
| 0372 297 | Core Telecom Limited | 19/02/2014 |
| 0372 306 | TalkTalk Communications Limited | 28/04/2014 |
| 0372 307 | TalkTalk Communications Limited | 28/04/2014 |
| 0372 308 | TalkTalk Communications Limited | 28/04/2014 |
| 0372 309 | TalkTalk Communications Limited | 28/04/2014 |
| 0372 331 | Telappliant Ltd | 11/06/2014 |
| 0372 341 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 342 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 357 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 358 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 359 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 361 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 362 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 363 | Spitfire Network Services Limited | 22/09/2015 |
| 0372 369 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 376 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 377 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0372 378 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 380 | Business Broadcast Communications Limited | 07/07/2016 |
| 0372 384 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 388 | TalkTalk Communications Limited | 28/04/2014 |
| 0372 399 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 400 | 24 Seven Communications Ltd | 26/02/2013 |
| 0372 414 | TeleSurf Limited | 23/07/2015 |
| 0372 435 | Invosys Limited | 15/05/2014 |
| 0372 436 | Invosys Limited | 15/05/2014 |
| 0372 437 | Invosys Limited | 15/05/2014 |
| 0372 438 | Invosys Limited | 15/05/2014 |
| 0372 443 | TeleSurf Limited | 23/07/2015 |
| 0372 445 | TeleSurf Limited | 23/07/2015 |
| 0372 446 | Virgin Media Limited | 08/04/2016 |
| 0372 447 | TeleSurf Limited | 23/07/2015 |
| 0372 448 | TeleSurf Limited | 23/07/2015 |
| 0372 449 | TeleSurf Limited | 23/07/2015 |
| 0372 450 | TeleSurf Limited | 23/07/2015 |
| 0372 451 | TeleSurf Limited | 23/07/2015 |
| 0372 459 | Numbers Telecom Limited | 11/02/2016 |
| 0372 460 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 461 | Numbers Telecom Limited | 11/02/2016 |
| 0372 462 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0372 463 | Numbers Telecom Limited | 11/02/2016 |
| 0372 465 | Numbers Telecom Limited | 11/02/2016 |
| 0372 467 | Numbers Telecom Limited | 11/02/2016 |
| 0372 483 | Magrathea Telecommunications Limited | 03/10/2017 |
| 0372 494 | VoiceHost Limited | 27/02/2012 |
| 0372 555 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0372 556 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0372 557 | Gamma Telecom Holdings Ltd | 21/06/2012 |
| 0372 586 | Voxbone SA | 19/07/2021 |
| 0372 601 | Vodafone Ltd (Energis) | 02/09/2014 |
| 0372 610 | Cloud Telecom Ltd | 23/09/2015 |
| 0372 616 | VoiceHost Limited | 25/06/2014 |
| 0372 617 | VoiceHost Limited | 25/06/2014 |
| 0372 618 | VoiceHost Limited | 25/06/2014 |
| 0372 619 | VoiceHost Limited | 25/06/2014 |
| 0372 637 | Voice Simplified Limited | 06/06/2014 |
| 0372 683 | Liquid 11 Limited | 06/10/2014 |
| 0372 685 | Liquid 11 Limited | 06/10/2014 |
| 0372 707 | Redwood Technologies Ltd | 20/11/2018 |
| 0372 729 | Invosys Limited | 26/04/2016 |
| 0372 732 | Telecoms World Direct Ltd | 21/07/2014 |
| 0372 750 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0372 757 | Redwood Technologies Ltd | 20/11/2018 |
| 0372 772 | Redwood Technologies Ltd | 20/11/2018 |
| 0372 800 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 801 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 802 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 803 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 804 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 805 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 811 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 812 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 813 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 814 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 815 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 816 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 817 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 818 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 819 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 846 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 847 | Nexus Telecommunications Limited | 18/05/2020 |
| 0372 848 | Nexus Telecommunications Limited | 18/05/2020 |