01234 20 | TGL Services (UK) Ltd | 02/02/2015 |
01234 21 | BT | 15/07/1994 |
01234 22 | BT | 15/07/1994 |
01234 230 | Gamma Telecom Holdings Ltd | 08/01/2021 |
01234 231 | Sky UK Limited | 13/04/2021 |
01234 233 | Gamma Telecom Holdings Ltd | 23/03/2021 |
01234 234 | Colt Technology Services | 21/12/2020 |
01234 235 | Vodafone Ltd (C&W) | 01/04/2019 |
01234 238 | Vodafone Ltd (Thus) | 10/08/2011 |
01234 239 | Vodafone Ltd (Thus) | 10/08/2011 |
01234 24 | BT | 15/07/1994 |
01234 25 | Vodafone Ltd (Energis) | 26/05/2006 |
01234 26 | BT | 15/07/1994 |
01234 27 | BT | 15/07/1994 |
01234 28 | FleXtel Limited | 19/10/2005 |
01234 29 | Virgin Media Limited | 13/06/1996 |
01234 30 | Virgin Media Limited | 05/10/1994 |
01234 31 | Virgin Media Limited | 05/10/1994 |
01234 32 | BT | 15/07/1994 |
01234 330 | BT | 15/07/1994 |
01234 331 | BT | 15/07/1994 |
01234 332 | BT | 15/07/1994 |
01234 333 | BT | 15/07/1994 |
01234 334 | BT | 15/07/1994 |
01234 336 | BT | 15/07/1994 |
01234 339 | BT | 15/07/1994 |
01234 34 | BT | 15/07/1994 |
01234 35 | BT | 15/07/1994 |
01234 36 | BT | 15/07/1994 |
01234 372 | BT | 20/02/2012 |
01234 373 | BT | 20/02/2012 |
01234 376 | BT | 20/02/2012 |
01234 378 | BT | 20/02/2012 |
01234 381 | BT | 20/02/2012 |
01234 382 | BT | 20/02/2012 |
01234 385 | BT | 28/06/2021 |
01234 389 | BT | 20/02/2012 |
01234 390 | BT | 20/02/2012 |
01234 391 | BT | 20/02/2012 |
01234 392 | BT | 20/02/2012 |
01234 393 | BT | 20/02/2012 |
01234 397 | BT | 20/02/2012 |
01234 398 | BT | 20/02/2012 |
01234 399 | BT | 20/02/2012 |
01234 40 | Virgin Media Limited | 22/08/1995 |
01234 410 | EG TECHNOLOGIES LIMITED | 19/06/2020 |
01234 412 | Mi Telecom Limited | 06/07/2020 |
01234 413 | BT | 01/05/2020 |
01234 414 | Colt Technology Services | 07/05/2020 |
01234 415 | Colt Technology Services | 23/06/2020 |
01234 416 | DIDWW Ireland Limited | 29/06/2020 |
01234 417 | BT | 19/08/2020 |
01234 418 | VOXYONDER NETWORK SERVICES UK LTD | 10/09/2020 |
01234 419 | Gamma Telecom Holdings Ltd | 27/05/2020 |
01234 420 | Lumen Technologies UK Limited | 25/07/2011 |
01234 421 | Lumen Technologies UK Limited | 25/07/2011 |
01234 422 | Lumen Technologies UK Limited | 25/07/2011 |
01234 423 | Lumen Technologies UK Limited | 25/07/2011 |
01234 424 | Lumen Technologies UK Limited | 25/07/2011 |
01234 429 | Lumen Technologies UK Limited | 25/07/2011 |
01234 430 | Affiniti Integrated Solutions Limited | 16/12/2011 |
01234 432 | Affiniti Integrated Solutions Limited | 16/12/2011 |
01234 433 | Affiniti Integrated Solutions Limited | 16/12/2011 |
01234 434 | Affiniti Integrated Solutions Limited | 16/12/2011 |
01234 436 | Affiniti Integrated Solutions Limited | 16/12/2011 |
01234 438 | Affiniti Integrated Solutions Limited | 16/12/2011 |
01234 440 | Inclarity Communications Limited | 30/11/2010 |
01234 441 | Inclarity Communications Limited | 30/11/2010 |
01234 442 | Inclarity Communications Limited | 30/11/2010 |
01234 443 | Inclarity Communications Limited | 30/11/2010 |
01234 445 | Inclarity Communications Limited | 30/11/2010 |
01234 446 | Inclarity Communications Limited | 30/11/2010 |
01234 458 | Vodafone Ltd (C&W) | 10/08/2015 |
01234 459 | Vodafone Ltd (C&W) | 29/06/2018 |
01234 466 | Served Up Limited | 01/03/2013 |
01234 467 | Served Up Limited | 01/03/2013 |
01234 47 | Vodafone Ltd (C&W) | 03/10/2013 |
01234 48 | AQL Wholesale Ltd | 01/11/2004 |
01234 490 | GCI Network Solutions Ltd | 20/04/2017 |
01234 50 | Syntec Limited | 15/11/2005 |
01234 51 | TTNC Limited | 25/11/2013 |
01234 52 | Digital Mail Limited | 13/01/2006 |
01234 53 | Barritel Limited | 09/03/2006 |
01234 540 | GTT-EMEA LTD | 14/10/2021 |
01234 541 | GTT-EMEA LTD | 14/10/2021 |
01234 549 | GTT-EMEA LTD | 14/10/2021 |
01234 550 | Vodafone Ltd (C&W) | 18/06/2013 |
01234 552 | Vodafone Ltd (C&W) | 18/06/2013 |
01234 555 | Vodafone Ltd (C&W) | 18/06/2013 |
01234 57 | Redcentric Solutions Limited | 05/06/2015 |
01234 580 | Bicom Systems EURL | 02/03/2012 |
01234 581 | VoiceHost Limited | 22/06/2010 |
01234 582 | API Telecom Limited | 26/03/2012 |
01234 583 | ICC Networks Ltd | 12/04/2012 |
01234 584 | IOVOX Limited | 03/04/2012 |
01234 585 | Sky UK Limited | 21/06/2013 |
01234 586 | Hello Telecom (UK) Limited | 25/07/2012 |
01234 587 | Ziron Limited | 27/07/2012 |
01234 589 | TalkTalk Communications Limited | 06/09/2012 |
01234 59 | Alphatalk Limited | 31/01/2014 |
01234 600 | Linear Telecoms Limited | 04/10/2010 |
01234 601 | Minotaur Telecom Limited | 01/02/2013 |
01234 602 | Sky UK Limited | 21/06/2013 |
01234 603 | Media Hawk Ltd | 10/04/2013 |
01234 604 | Kalnet4U Ltd | 08/05/2013 |
01234 605 | XoverX Ltd | 01/05/2013 |
01234 606 | Sky UK Limited | 20/06/2016 |
01234 607 | Gamma Telecom Holdings Ltd | 04/10/2016 |
01234 608 | Gamma Telecom Holdings Ltd | 20/02/2017 |
01234 609 | Adepteo Limited | 16/01/2017 |
01234 619 | Colt Technology Services | 26/08/2011 |
01234 62 | Verizon UK Limited | 03/08/2005 |
01234 630 | TalkTalk Communications Limited | 26/03/2015 |
01234 631 | TalkTalk Communications Limited | 24/04/2015 |
01234 632 | IP Voice Networks Ltd | 20/09/2017 |
01234 633 | Lanonyx Telecom Limited | 03/03/2015 |
01234 634 | YayYay Limited | 23/04/2015 |
01234 635 | Sky UK Limited | 19/05/2015 |
01234 636 | M247 Ltd | 29/05/2015 |
01234 637 | BT | 17/12/2020 |
01234 638 | Sky UK Limited | 09/11/2015 |
01234 639 | Gamma Telecom Holdings Ltd | 05/06/2015 |
01234 64 | Virtual Talk Ltd | 23/04/2014 |
01234 65 | Invade International Ltd | 20/01/2016 |
01234 66 | IV Response Limited | 04/07/2005 |
01234 670 | Digitech Solutions Global Limited | 22/06/2012 |
01234 671 | IOVOX Limited | 21/09/2015 |
01234 672 | Colt Technology Services | 12/10/2020 |
01234 673 | Gamma Telecom Holdings Ltd | 18/03/2016 |
01234 674 | Colt Technology Services | 26/10/2016 |
01234 675 | Gamma Telecom Holdings Ltd | 03/08/2017 |
01234 676 | Gamma Telecom Holdings Ltd | 24/08/2020 |
01234 677 | IOVOX Limited | 23/12/2016 |
01234 678 | I.T Communications Limited | 20/11/2015 |
01234 679 | Mintaka Limited | 29/02/2016 |
01234 68 | BT | 15/07/1994 |
01234 690 | Six Degrees Technology Group Limited | 13/01/2020 |
01234 691 | Six Degrees Technology Group Limited | 13/01/2020 |
01234 692 | Six Degrees Technology Group Limited | 13/01/2020 |
01234 694 | Six Degrees Technology Group Limited | 13/01/2020 |
01234 70 | BT | 15/07/1994 |
01234 71 | BT | 15/07/1994 |
01234 720 | BT | 22/02/2012 |
01234 721 | BT | 22/02/2012 |
01234 722 | BT | 22/02/2012 |
01234 73 | Vodafone Ltd (C&W) | 03/10/2013 |
01234 740 | BT | 20/02/2012 |
01234 741 | BT | 20/02/2012 |
01234 742 | BT | 20/02/2012 |
01234 743 | BT | 20/02/2012 |
01234 744 | BT | 20/02/2012 |
01234 75 | BT | 15/07/1994 |
01234 76 | BT | 15/07/1994 |
01234 77 | BT | 15/07/1994 |
01234 78 | BT | 15/07/1994 |
01234 79 | Vodafone Ltd (C&W) | 03/10/2013 |
01234 80 | Citrus Telecommunications Ltd | 08/03/2006 |
01234 81 | Magrathea Telecommunications Limited | 24/09/2004 |
01234 82 | BT | 15/07/1994 |
01234 83 | BT | 15/07/1994 |
01234 84 | BT | 15/07/1994 |
01234 85 | BT | 15/07/1994 |
01234 860 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 861 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 862 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 863 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 864 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 865 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 866 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 867 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 868 | Gamma Telecom Holdings Ltd | 15/11/2012 |
01234 87 | BT | 15/07/1994 |
01234 880 | BT | 21/02/2012 |
01234 881 | BT | 21/02/2012 |
01234 882 | BT | 21/02/2012 |
01234 888 | BT | 21/02/2012 |
01234 889 | BT | 21/02/2012 |
01234 893 | Virgin Media Limited | 18/06/2012 |
01234 894 | Virgin Media Limited | 18/06/2012 |
01234 895 | Virgin Media Limited | 18/06/2012 |
01234 896 | Virgin Media Limited | 18/06/2012 |
01234 897 | Virgin Media Limited | 18/06/2012 |
01234 898 | Virgin Media Limited | 18/06/2012 |
01234 899 | Virgin Media Limited | 18/06/2012 |
01234 900 | Liquid 11 Limited | 13/06/2013 |
01234 901 | Virgin Media Limited | 30/08/2006 |
01234 902 | TelNG Limited | 26/02/2007 |
01234 903 | Localphone Limited | 24/04/2007 |
01234 904 | Orange Business Holdings UK Limited | 26/02/2013 |
01234 905 | Voiceflex Limited | 27/07/2007 |
01234 906 | Resilient PLC | 11/12/2006 |
01234 907 | Spitfire Network Services Limited | 11/08/2006 |
01234 909 | Commi Holdings Limited | 21/11/2016 |
01234 910 | TalkTalk Communications Limited | 08/08/2007 |
01234 911 | (AQ) LIMITED | 19/10/2011 |
01234 912 | VoIP-Un Limited | 25/10/2007 |
01234 913 | Digital Space Group Limited | 29/11/2007 |
01234 914 | Nodemax Limited | 07/07/2008 |
01234 915 | Nationwide Telephone Assistance Ltd | 14/07/2008 |
01234 916 | Telecom2 Limited | 11/09/2009 |
01234 918 | TalkTalk Communications Limited | 13/02/2013 |
01234 919 | Net-Work Internet Ltd | 21/07/2008 |
01234 920 | Pulsant (Scotland) Limited | 23/03/2009 |
01234 921 | Solutios Limited | 27/08/2008 |
01234 923 | Voxbone SA | 18/09/2008 |
01234 924 | Inet Telecoms Ltd (Voipfone) | 24/09/2008 |
01234 926 | Sky UK Limited | 21/06/2013 |
01234 927 | IPV6 Limited | 27/01/2009 |
01234 928 | Mars Communications Limited | 03/02/2009 |
01234 929 | Andrews & Arnold (Numbers) Ltd | 26/02/2009 |
01234 930 | TalkTalk Communications Limited | 05/03/2009 |
01234 931 | Nexus Telecommunications Limited | 31/03/2009 |
01234 932 | Telecoms World PLC | 06/03/2009 |
01234 933 | Dynamic Mobile Billing Limited | 09/04/2009 |
01234 934 | Fuse 2 Communications Ltd | 03/07/2017 |
01234 936 | Vectone Mobile Limited | 29/06/2009 |
01234 937 | TeleWare Group PLC | 21/02/2013 |
01234 938 | Vonage Limited | 21/01/2015 |
01234 940 | CFL Communications Ltd | 07/07/2009 |
01234 941 | Calltracks Limited | 19/09/2013 |
01234 942 | GCI Network Solutions Ltd | 19/04/2017 |
01234 943 | 8x8 UK Limited | 19/02/2010 |
01234 944 | I-NET COMMUNICATIONS GROUP PLC | 11/02/2010 |
01234 945 | Numbergroup Utilities Ltd | 02/11/2010 |
01234 946 | E164 Ltd | 22/03/2010 |
01234 947 | Core Telecom Limited | 05/08/2010 |
01234 948 | Media Telecom Ltd | 05/08/2010 |
01234 949 | Windsor Telecom Ltd | 19/07/2010 |
01234 950 | Sky UK Limited | 21/06/2013 |
01234 951 | Atomstream Limited | 15/11/2010 |
01234 952 | Orbtalk Limited | 05/09/2011 |
01234 953 | IP Wholesale Limited | 01/06/2017 |
01234 954 | TalkTalk Communications Limited | 25/10/2011 |
01234 955 | Internexus Networks Limited | 18/11/2011 |
01234 956 | Tuxtel Ltd | 21/12/2011 |
01234 957 | Nexbridge Communications Limited | 10/01/2012 |
01234 958 | Simwood eSMS Limited | 01/02/2012 |
01234 959 | Sky UK Limited | 21/06/2013 |
01234 960 | Sky UK Limited | 12/06/2013 |
01234 961 | Sky UK Limited | 21/08/2013 |
01234 962 | Sky UK Limited | 21/08/2013 |
01234 963 | WIGHTFIBRE LIMITED | 14/05/2014 |
01234 964 | Invoco Ltd | 18/10/2013 |
01234 965 | TalkTalk Communications Limited | 20/06/2014 |
01234 966 | iHub 2 Limited | 18/05/2016 |
01234 967 | Content Guru Limited | 29/08/2013 |
01234 968 | Affiniti Integrated Solutions Limited | 09/02/2015 |
01234 969 | Redwood Technologies Ltd | 15/11/2018 |
01234 970 | Number Services Ltd. | 22/11/2018 |
01234 971 | Invosys Limited | 23/08/2017 |
01234 972 | NFON UK Ltd | 20/09/2017 |
01234 973 | Zapappi Ltd | 26/10/2017 |
01234 974 | Sky UK Limited | 10/09/2019 |
01234 975 | Gamma Telecom Holdings Ltd | 04/11/2019 |
01234 976 | Dial 9 Communications Limited | 18/10/2019 |
01234 977 | ICUK Computing Services Limited | 20/09/2019 |
01234 978 | Belgacom International Carrier Services SA | 03/10/2019 |
01234 979 | SiPalto Ltd | 05/11/2019 |
01234 980 | Entanet International Ltd | 05/12/2017 |
01234 981 | Gamma Telecom Holdings Ltd | 07/02/2018 |
01234 982 | Gamma Telecom Holdings Ltd | 08/03/2018 |
01234 983 | Telappliant Ltd | 05/04/2018 |
01234 984 | BT | 26/03/2019 |
01234 986 | Colt Technology Services | 27/03/2019 |
01234 987 | Gamma Telecom Holdings Ltd | 06/03/2019 |
01234 988 | Gamma Telecom Holdings Ltd | 11/05/2021 |
01234 989 | Club Communications Ltd | 18/05/2018 |