01903 00 | Global Reach Networks Limited | 10/02/2021 |
01903 20 | BT | 15/07/1994 |
01903 21 | BT | 15/07/1994 |
01903 22 | BT | 21/03/1995 |
01903 23 | BT | 15/07/1994 |
01903 24 | BT | 15/07/1994 |
01903 25 | Gamma Telecom Holdings Ltd | 13/03/2004 |
01903 26 | BT | 15/07/1994 |
01903 27 | BT | 15/07/1994 |
01903 28 | BT | 15/07/1994 |
01903 290 | Linear Telecoms Limited | 19/10/2010 |
01903 291 | Internexus Networks Limited | 22/11/2011 |
01903 292 | Hello Telecom (UK) Limited | 01/02/2012 |
01903 293 | Bicom Systems EURL | 01/03/2012 |
01903 294 | ICC Networks Ltd | 18/04/2012 |
01903 296 | API Telecom Limited | 19/04/2012 |
01903 297 | TalkTalk Communications Limited | 20/04/2012 |
01903 298 | Ziron Limited | 01/08/2012 |
01903 299 | Invoco Ltd | 22/05/2012 |
01903 30 | TelNG Limited | 01/03/2007 |
01903 31 | Verizon UK Limited | 18/04/2007 |
01903 320 | (AQ) LIMITED | 27/09/2012 |
01903 321 | Vodafone Ltd (Energis) | 06/06/2008 |
01903 322 | VoIP-Un Limited | 08/11/2007 |
01903 323 | Voiceflex Limited | 30/07/2007 |
01903 324 | Digital Space Group Limited | 04/06/2008 |
01903 325 | Redcentric Solutions Limited | 05/06/2015 |
01903 326 | Telecom2 Limited | 10/09/2009 |
01903 327 | Digital Space Group Limited | 15/03/2016 |
01903 328 | Nodemax Limited | 14/07/2008 |
01903 329 | Entanet International Ltd | 21/12/2007 |
01903 330 | Localphone Limited | 23/05/2007 |
01903 331 | Inet Telecoms Ltd (Voipfone) | 24/09/2008 |
01903 332 | Barritel Limited | 21/06/2007 |
01903 333 | Net-Work Internet Ltd | 30/10/2007 |
01903 334 | Affiniti Integrated Solutions Limited | 12/11/2007 |
01903 335 | TGL Services (UK) Ltd | 02/02/2015 |
01903 337 | Voxbone SA | 29/09/2008 |
01903 339 | TalkTalk Communications Limited | 12/01/2015 |
01903 340 | TalkTalk Communications Limited | 12/02/2013 |
01903 341 | Solutios Limited | 26/11/2008 |
01903 343 | Served Up Limited | 14/10/2008 |
01903 344 | IPV6 Limited | 04/02/2009 |
01903 345 | Mars Communications Limited | 19/02/2009 |
01903 346 | Invade International Ltd | 13/01/2016 |
01903 347 | Vectone Mobile Limited | 01/07/2009 |
01903 348 | Andrews & Arnold (Numbers) Ltd | 09/04/2009 |
01903 349 | CFL Communications Ltd | 20/07/2009 |
01903 350 | Telecoms World PLC | 02/07/2009 |
01903 352 | Nexus Telecommunications Limited | 07/10/2009 |
01903 355 | I-NET COMMUNICATIONS GROUP PLC | 14/01/2010 |
01903 356 | TeleWare Group PLC | 27/01/2010 |
01903 357 | Buzz Networks Limited | 24/02/2010 |
01903 358 | Atomstream Limited | 12/04/2010 |
01903 366 | TalkTalk Communications Limited | 31/08/2011 |
01903 367 | TalkTalk Communications Limited | 31/08/2011 |
01903 368 | TalkTalk Communications Limited | 31/08/2011 |
01903 369 | TalkTalk Communications Limited | 31/08/2011 |
01903 370 | Suretec Systems Ltd | 13/05/2010 |
01903 371 | Calltracks Limited | 20/09/2013 |
01903 372 | Simwood eSMS Limited | 03/08/2010 |
01903 373 | Windsor Telecom Ltd | 22/07/2010 |
01903 374 | Core Telecom Limited | 06/08/2010 |
01903 375 | Telephone Box Limited | 10/12/2010 |
01903 377 | Numbergroup Utilities Ltd | 04/11/2010 |
01903 378 | Phone Co-Op Numbering Limited | 23/12/2010 |
01903 380 | Invosys Limited | 10/04/2012 |
01903 381 | Belgacom International Carrier Services SA | 20/06/2016 |
01903 383 | Calltracks Limited | 21/10/2014 |
01903 384 | Adepteo Limited | 29/11/2016 |
01903 385 | Gamma Telecom Holdings Ltd | 06/12/2016 |
01903 386 | Sky UK Limited | 10/06/2016 |
01903 388 | Digital Mail Limited | 09/03/2016 |
01903 389 | Nationwide Telephone Assistance Ltd | 22/10/2007 |
01903 390 | Resilient PLC | 09/09/2011 |
01903 399 | Resilient PLC | 09/09/2011 |
01903 40 | Syntec Limited | 22/11/2005 |
01903 41 | Sky UK Limited | 27/06/2013 |
01903 423 | Digital Space Group Limited | 12/04/2016 |
01903 43 | FleXtel Limited | 21/10/2005 |
01903 441 | Media Hawk Ltd | 10/04/2013 |
01903 442 | Kalnet4U Ltd | 04/06/2013 |
01903 443 | Redwood Technologies Ltd | 15/11/2018 |
01903 444 | Affiniti Integrated Solutions Limited | 18/07/2013 |
01903 445 | iHub 2 Limited | 18/05/2016 |
01903 446 | TalkTalk Communications Limited | 02/05/2014 |
01903 447 | Orange Business Holdings UK Limited | 13/06/2014 |
01903 448 | Orange Business Holdings UK Limited | 13/06/2014 |
01903 449 | XoverX Ltd | 26/04/2013 |
01903 477 | Spitfire Network Services Limited | 21/07/2011 |
01903 490 | VoiceHost Limited | 28/07/2010 |
01903 491 | IP Wholesale Limited | 01/06/2017 |
01903 492 | Sky UK Limited | 18/06/2021 |
01903 493 | Voxbone SA | 13/10/2021 |
01903 494 | Lanonyx Telecom Limited | 10/08/2021 |
01903 496 | Gamma Telecom Holdings Ltd | 22/04/2021 |
01903 50 | BT | 15/07/1994 |
01903 52 | Virgin Media Limited | 15/07/1994 |
01903 53 | Virgin Media Limited | 24/01/1995 |
01903 54 | BT | 15/07/1994 |
01903 55 | GCI Network Solutions Ltd | 02/05/2017 |
01903 56 | Vodafone Ltd (Thus) | 26/01/2012 |
01903 57 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 589 | GTT-EMEA LTD | 13/10/2021 |
01903 60 | Virgin Media Limited | 08/03/1996 |
01903 61 | Virgin Media Limited | 08/03/1996 |
01903 620 | Virgin Media Limited | 27/06/2012 |
01903 629 | Virgin Media Limited | 27/06/2012 |
01903 630 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 636 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 637 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 638 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 639 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 64 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 65 | TTNC Limited | 13/11/2013 |
01903 660 | Lumen Technologies UK Limited | 25/07/2011 |
01903 663 | Lumen Technologies UK Limited | 25/07/2011 |
01903 669 | Lumen Technologies UK Limited | 25/07/2011 |
01903 68 | AQL Wholesale Ltd | 01/11/2004 |
01903 69 | BT | 15/07/1994 |
01903 70 | BT | 15/07/1994 |
01903 71 | BT | 15/07/1994 |
01903 72 | BT | 15/07/1994 |
01903 73 | BT | 15/07/1994 |
01903 74 | BT | 15/07/1994 |
01903 75 | BT | 15/07/1994 |
01903 76 | BT | 15/07/1994 |
01903 77 | BT | 15/07/1994 |
01903 78 | BT | 15/07/1994 |
01903 790 | Inclarity Communications Limited | 08/11/2012 |
01903 791 | Inclarity Communications Limited | 08/11/2012 |
01903 792 | Inclarity Communications Limited | 08/11/2012 |
01903 795 | Inclarity Communications Limited | 08/11/2012 |
01903 798 | Inclarity Communications Limited | 13/11/2020 |
01903 800 | Six Degrees Technology Group Limited | 03/04/2020 |
01903 804 | Six Degrees Technology Group Limited | 03/04/2020 |
01903 81 | BT | 15/07/1994 |
01903 82 | BT | 15/07/1994 |
01903 83 | BT | 15/07/1994 |
01903 84 | Vodafone Ltd (C&W) | 09/09/2013 |
01903 85 | BT | 15/07/1994 |
01903 860 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 861 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 863 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 866 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 867 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 868 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 869 | Magrathea Telecommunications Limited | 17/11/2011 |
01903 87 | BT | 15/07/1994 |
01903 88 | BT | 15/07/1994 |
01903 89 | BT | 15/07/1994 |
01903 900 | Orbtalk Limited | 23/08/2011 |
01903 901 | Barritec Limited | 23/09/2011 |
01903 903 | Nexbridge Communications Limited | 09/03/2012 |
01903 904 | Minotaur Telecom Limited | 06/02/2013 |
01903 905 | TalkTalk Communications Limited | 14/09/2012 |
01903 906 | IOVOX Limited | 04/07/2012 |
01903 907 | Content Guru Limited | 11/10/2012 |
01903 908 | Intrado Cloud Solutions Limited | 15/01/2013 |
01903 910 | YayYay Limited | 24/04/2015 |
01903 911 | Sky UK Limited | 26/02/2015 |
01903 912 | Metronet (UK) Limited | 21/05/2019 |
01903 913 | Orange Business Holdings UK Limited | 24/04/2015 |
01903 916 | Sky UK Limited | 09/11/2015 |
01903 917 | Mintaka Limited | 26/09/2016 |
01903 918 | Sky UK Limited | 20/04/2017 |
01903 919 | Colt Technology Services | 07/05/2015 |
01903 920 | TalkTalk Communications Limited | 05/07/2017 |
01903 921 | IP Voice Networks Ltd | 20/09/2017 |
01903 922 | Number Services Ltd. | 22/11/2018 |
01903 923 | Zapappi Ltd | 26/10/2017 |
01903 924 | Gamma Telecom Holdings Ltd | 14/02/2018 |
01903 925 | Telappliant Ltd | 05/04/2018 |
01903 926 | Affiniti Integrated Solutions Limited | 24/04/2018 |
01903 927 | Gamma Telecom Holdings Ltd | 03/08/2017 |
01903 928 | Fuse 2 Communications Ltd | 03/07/2017 |
01903 929 | IOVOX Limited | 31/01/2017 |
01903 930 | Vonage Limited | 28/01/2015 |
01903 931 | I.T Communications Limited | 19/05/2015 |
01903 932 | Orange Business Holdings UK Limited | 17/02/2015 |
01903 933 | Sky UK Limited | 14/06/2019 |
01903 934 | TalkTalk Communications Limited | 09/01/2020 |
01903 936 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 27/01/2020 |
01903 937 | Sky UK Limited | 08/09/2020 |
01903 938 | Mi Telecom Limited | 06/07/2020 |
01903 939 | VOXYONDER NETWORK SERVICES UK LTD | 28/08/2020 |
01903 940 | Dial 9 Communications Limited | 08/01/2020 |
01903 941 | TELNYX UK LIMITED | 07/05/2020 |
01903 942 | BT | 12/01/2021 |
01903 943 | SiPalto Ltd | 26/06/2020 |
01903 944 | Gamma Telecom Holdings Ltd | 17/06/2020 |
01903 945 | Colt Technology Services | 12/10/2020 |
01903 946 | BT | 26/11/2019 |
01903 947 | Gamma Telecom Holdings Ltd | 12/10/2020 |
01903 948 | Gamma Telecom Holdings Ltd | 04/11/2019 |
01903 949 | ICUK Computing Services Limited | 20/09/2019 |
01903 950 | Sky UK Limited | 04/06/2018 |
01903 951 | Club Communications Ltd | 13/08/2018 |
01903 952 | Gamma Telecom Holdings Ltd | 17/09/2018 |
01903 953 | Colt Technology Services | 04/06/2018 |
01903 954 | TalkTalk Communications Limited | 09/11/2018 |
01903 955 | DIDWW Ireland Limited | 22/01/2019 |
01903 957 | NFON UK Ltd | 18/07/2018 |
01903 958 | BT | 03/01/2019 |
01903 959 | Gamma Telecom Holdings Ltd | 29/03/2019 |