01603 20 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 21 | BT | 15/07/1994 |
01603 22 | BT | 15/07/1994 |
01603 23 | BT | 15/07/1994 |
01603 24 | BT | 15/07/1994 |
01603 25 | BT | 15/07/1994 |
01603 26 | BT | 15/07/1994 |
01603 27 | BT | 15/07/1994 |
01603 28 | BT | 15/07/1994 |
01603 290 | Net-Work Internet Ltd | 21/09/2007 |
01603 291 | TalkTalk Communications Limited | 12/02/2013 |
01603 292 | Invade International Ltd | 13/01/2016 |
01603 293 | VoIP-Un Limited | 01/11/2007 |
01603 294 | Affiniti Integrated Solutions Limited | 17/12/2007 |
01603 295 | Digital Space Group Limited | 15/03/2016 |
01603 296 | Telecom2 Limited | 10/09/2009 |
01603 298 | Voxbone SA | 29/01/2008 |
01603 299 | Nationwide Telephone Assistance Ltd | 10/07/2008 |
01603 30 | BT | 15/07/1994 |
01603 310 | Nodemax Limited | 14/07/2008 |
01603 311 | Syntec Limited | 02/09/2008 |
01603 314 | GCI Network Solutions Ltd | 25/04/2017 |
01603 315 | Barritel Limited | 08/10/2008 |
01603 316 | Served Up Limited | 14/10/2008 |
01603 318 | Barritec Limited | 03/10/2012 |
01603 319 | Vonage Limited | 26/01/2015 |
01603 320 | BT | 04/06/2020 |
01603 321 | Andrews & Arnold (Numbers) Ltd | 23/03/2009 |
01603 322 | Sky UK Limited | 02/07/2013 |
01603 323 | TalkTalk Communications Limited | 13/04/2018 |
01603 324 | IP Wholesale Limited | 01/06/2017 |
01603 325 | New Call Telecom Ltd | 18/03/2014 |
01603 326 | Lumen Technologies UK Limited | 03/03/2009 |
01603 327 | Inet Telecoms Ltd (Voipfone) | 18/11/2008 |
01603 328 | Sky UK Limited | 08/09/2020 |
01603 329 | Telecoms World PLC | 28/04/2009 |
01603 331 | BT | 15/03/2021 |
01603 332 | Vectone Mobile Limited | 01/07/2009 |
01603 333 | Gamma Telecom Holdings Ltd | 11/03/2021 |
01603 334 | Invoco Ltd | 28/01/2015 |
01603 335 | Sky UK Limited | 19/05/2015 |
01603 336 | YayYay Limited | 24/04/2015 |
01603 337 | WIGHTFIBRE LIMITED | 10/12/2009 |
01603 338 | I-NET COMMUNICATIONS GROUP PLC | 13/01/2010 |
01603 339 | Buzz Networks Limited | 01/03/2010 |
01603 34 | AQL Wholesale Ltd | 01/11/2004 |
01603 35 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 360 | GCI Network Solutions Ltd | 02/05/2017 |
01603 361 | Twilio Ireland Limited | 13/10/2020 |
01603 362 | Sky UK Limited | 14/12/2020 |
01603 363 | Colt Technology Services | 25/11/2020 |
01603 364 | Gamma Telecom Holdings Ltd | 22/09/2021 |
01603 365 | Gamma Telecom Holdings Ltd | 28/01/2021 |
01603 366 | Mi Telecom Limited | 03/07/2020 |
01603 367 | Gamma Telecom Holdings Ltd | 10/11/2020 |
01603 368 | Gamma Telecom Holdings Ltd | 17/06/2020 |
01603 369 | Gamma Telecom Holdings Ltd | 08/09/2020 |
01603 37 | Verizon UK Limited | 24/11/2004 |
01603 380 | 8x8 UK Limited | 19/02/2010 |
01603 381 | Liquid 11 Limited | 20/04/2010 |
01603 383 | Minotaur Telecom Limited | 31/01/2013 |
01603 384 | Calltracks Limited | 23/09/2013 |
01603 387 | Sky UK Limited | 02/07/2013 |
01603 388 | Suretec Systems Ltd | 06/05/2010 |
01603 389 | Numbergroup Utilities Ltd | 02/11/2010 |
01603 390 | Linear Telecoms Limited | 14/10/2010 |
01603 391 | API Telecom Limited | 05/04/2012 |
01603 392 | ICC Networks Ltd | 17/04/2012 |
01603 393 | TalkTalk Communications Limited | 04/09/2015 |
01603 394 | Ziron Limited | 30/07/2012 |
01603 395 | Sky UK Limited | 02/07/2013 |
01603 396 | TalkTalk Communications Limited | 24/08/2012 |
01603 397 | Gamma Telecom Holdings Ltd | 20/09/2012 |
01603 398 | IOVOX Limited | 03/07/2012 |
01603 399 | Numbergroup Utilities Ltd | 12/04/2019 |
01603 40 | BT | 15/07/1994 |
01603 41 | BT | 15/07/1994 |
01603 42 | BT | 15/07/1994 |
01603 43 | BT | 15/07/1994 |
01603 44 | Virgin Media Limited | 27/01/1997 |
01603 45 | BT | 15/07/1994 |
01603 46 | Virgin Media Limited | 11/04/1997 |
01603 47 | Virgin Media Limited | 11/04/1997 |
01603 48 | BT | 15/07/1994 |
01603 49 | Virgin Media Limited | 11/04/1997 |
01603 50 | BT | 15/07/1994 |
01603 51 | Gamma Telecom Holdings Ltd | 01/03/2004 |
01603 520 | Windsor Telecom Ltd | 22/07/2010 |
01603 522 | Intrado Cloud Solutions Limited | 02/08/2010 |
01603 523 | Core Telecom Limited | 06/08/2010 |
01603 524 | Plus Telecom Limited | 24/09/2010 |
01603 525 | Citrus Telecommunications Ltd | 04/11/2010 |
01603 526 | Sky UK Limited | 22/09/2015 |
01603 527 | Sky UK Limited | 02/07/2013 |
01603 528 | Sky UK Limited | 02/07/2013 |
01603 529 | Numbers Plus Ltd | 28/07/2011 |
01603 530 | TGL Services (UK) Ltd | 02/02/2015 |
01603 531 | BT | 26/03/2019 |
01603 532 | TGL Services (UK) Ltd | 02/02/2015 |
01603 533 | TGL Services (UK) Ltd | 02/02/2015 |
01603 534 | TGL Services (UK) Ltd | 02/02/2015 |
01603 535 | Affiniti Integrated Solutions Limited | 30/08/2019 |
01603 536 | BT | 26/09/2019 |
01603 537 | Gamma Telecom Holdings Ltd | 12/11/2019 |
01603 539 | SiPalto Ltd | 05/11/2019 |
01603 540 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 541 | Telappliant Ltd | 05/04/2018 |
01603 542 | Gamma Telecom Holdings Ltd | 04/06/2018 |
01603 543 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 544 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 545 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 546 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 547 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 548 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 549 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 550 | Lumen Technologies UK Limited | 03/04/2006 |
01603 552 | Kalnet4U Ltd | 24/05/2013 |
01603 553 | Lumen Technologies UK Limited | 03/04/2006 |
01603 554 | Digital Mail Limited | 02/02/2007 |
01603 555 | Simwood eSMS Limited | 18/07/2006 |
01603 557 | TelNG Limited | 28/02/2007 |
01603 558 | Voiceflex Limited | 30/07/2007 |
01603 559 | VoiceHost Limited | 30/06/2010 |
01603 560 | Sky UK Limited | 02/07/2013 |
01603 561 | Colt Technology Services | 20/10/2011 |
01603 562 | Hello Telecom (UK) Limited | 17/11/2011 |
01603 563 | Internexus Networks Limited | 21/11/2011 |
01603 564 | Nexbridge Communications Limited | 09/01/2012 |
01603 567 | Gamma Telecom Holdings Ltd | 09/04/2015 |
01603 568 | TalkTalk Communications Limited | 21/03/2012 |
01603 569 | Sky UK Limited | 02/07/2013 |
01603 570 | BT | 04/07/2018 |
01603 571 | Sky UK Limited | 23/07/2018 |
01603 572 | TalkTalk Communications Limited | 21/11/2018 |
01603 573 | Colt Technology Services | 13/08/2018 |
01603 574 | Gamma Telecom Holdings Ltd | 02/10/2018 |
01603 575 | Colt Technology Services | 04/06/2018 |
01603 576 | Gamma Telecom Holdings Ltd | 12/09/2019 |
01603 577 | Colt Technology Services | 13/09/2019 |
01603 578 | Gamma Telecom Holdings Ltd | 11/04/2019 |
01603 579 | Club Communications Ltd | 21/09/2018 |
01603 58 | Redcentric Solutions Limited | 05/06/2015 |
01603 59 | BT | 15/07/1994 |
01603 600 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 601 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 602 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 603 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 604 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 605 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 606 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 607 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 61 | BT | 15/07/1994 |
01603 62 | BT | 15/07/1994 |
01603 63 | BT | 15/07/1994 |
01603 640 | Virgin Media Limited | 20/06/2012 |
01603 641 | Virgin Media Limited | 20/06/2012 |
01603 642 | Virgin Media Limited | 20/06/2012 |
01603 643 | Virgin Media Limited | 20/06/2012 |
01603 644 | Virgin Media Limited | 20/06/2012 |
01603 645 | Virgin Media Limited | 20/06/2012 |
01603 646 | Virgin Media Limited | 20/06/2012 |
01603 647 | Virgin Media Limited | 27/08/2014 |
01603 648 | Virgin Media Limited | 20/06/2012 |
01603 649 | Virgin Media Limited | 20/06/2012 |
01603 656 | Vodafone Ltd (C&W) | 30/04/2020 |
01603 658 | Vodafone Ltd (Thus) | 04/01/2012 |
01603 659 | Vodafone Ltd (Thus) | 04/01/2012 |
01603 66 | BT | 15/07/1994 |
01603 67 | BT | 15/07/1994 |
01603 68 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 69 | BT | 15/07/1994 |
01603 70 | BT | 15/07/1994 |
01603 71 | BT | 15/07/1994 |
01603 72 | BT | 15/07/1994 |
01603 73 | BT | 15/07/1994 |
01603 74 | BT | 15/07/1994 |
01603 75 | BT | 15/07/1994 |
01603 76 | BT | 15/07/1994 |
01603 77 | BT | 15/07/1994 |
01603 78 | BT | 15/07/1994 |
01603 790 | Inclarity Communications Limited | 30/11/2010 |
01603 791 | Inclarity Communications Limited | 30/11/2010 |
01603 795 | Inclarity Communications Limited | 30/11/2010 |
01603 800 | Hyperoptic Ltd | 24/09/2021 |
01603 803 | Virgin Media Limited | 20/06/2012 |
01603 804 | Colt Technology Services | 09/09/2021 |
01603 806 | Virgin Media Limited | 20/06/2012 |
01603 807 | Virgin Media Limited | 20/06/2012 |
01603 808 | Virgin Media Limited | 20/06/2012 |
01603 809 | Virgin Media Limited | 20/06/2012 |
01603 81 | BT | 15/07/1994 |
01603 82 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 83 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 84 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 850 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 851 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 855 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 856 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 857 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 858 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 859 | Magrathea Telecommunications Limited | 16/11/2011 |
01603 86 | BT | 15/07/1994 |
01603 87 | BT | 15/07/1994 |
01603 88 | BT | 15/07/1994 |
01603 89 | BT | 15/07/1994 |
01603 901 | Six Degrees Technology Group Limited | 06/04/2020 |
01603 903 | GTT-EMEA LTD | 13/10/2021 |
01603 904 | VoiceHost Limited | 30/06/2010 |
01603 905 | TTNC Limited | 15/11/2013 |
01603 906 | Vodafone Ltd (C&W) | 06/09/2013 |
01603 907 | WAVECREST NETWORKS LIMITED | 16/12/2019 |
01603 908 | FleXtel Limited | 16/11/2005 |
01603 909 | TelXL Ltd | 31/10/2005 |
01603 910 | Virgin Media Limited | 19/12/2005 |
01603 912 | Virgin Media Limited | 14/10/2015 |
01603 913 | Digital Space Group Limited | 12/04/2016 |
01603 914 | (AQ) LIMITED | 11/09/2012 |
01603 915 | Net Solutions Europe Limited | 27/02/2006 |
01603 916 | Localphone Limited | 10/05/2007 |
01603 917 | Spitfire Network Services Limited | 22/08/2006 |
01603 918 | Resilient PLC | 29/12/2006 |
01603 919 | Vodafone Ltd (C&W) | 18/06/2013 |
01603 920 | TalkTalk Communications Limited | 31/08/2011 |
01603 926 | TalkTalk Communications Limited | 31/08/2011 |
01603 927 | TalkTalk Communications Limited | 31/08/2011 |
01603 928 | TalkTalk Communications Limited | 31/08/2011 |
01603 929 | TalkTalk Communications Limited | 31/08/2011 |
01603 931 | Gamma Telecom Holdings Ltd | 08/04/2016 |
01603 932 | Sky UK Limited | 21/04/2016 |
01603 933 | I.T Communications Limited | 21/03/2016 |
01603 935 | Sky UK Limited | 22/07/2016 |
01603 936 | Sky UK Limited | 03/10/2016 |
01603 937 | Gamma Telecom Holdings Ltd | 26/09/2016 |
01603 938 | Alnitak GmbH | 31/08/2016 |
01603 940 | Sky UK Limited | 02/07/2013 |
01603 941 | Content Guru Limited | 12/10/2012 |
01603 942 | Orange Business Holdings UK Limited | 17/01/2013 |
01603 943 | Media Hawk Ltd | 10/04/2013 |
01603 944 | Affiniti Integrated Solutions Limited | 26/11/2012 |
01603 945 | Sky UK Limited | 17/07/2013 |
01603 946 | Sky UK Limited | 02/07/2013 |
01603 947 | Sky UK Limited | 17/07/2013 |
01603 948 | Sky UK Limited | 02/09/2015 |
01603 949 | Digital Select Limited | 27/02/2013 |
01603 950 | Redwood Technologies Ltd | 15/11/2018 |
01603 951 | TalkTalk Communications Limited | 19/09/2013 |
01603 952 | BT | 30/09/2013 |
01603 953 | BT | 21/10/2013 |
01603 954 | Affiniti Integrated Solutions Limited | 19/11/2013 |
01603 955 | iHub 2 Limited | 18/05/2016 |
01603 956 | BT | 18/12/2013 |
01603 957 | Gamma Telecom Holdings Ltd | 20/11/2013 |
01603 958 | TalkTalk Communications Limited | 07/03/2014 |
01603 959 | Gamma Telecom Holdings Ltd | 04/06/2014 |
01603 960 | TalkTalk Communications Limited | 09/09/2014 |
01603 961 | Sky UK Limited | 15/09/2014 |
01603 962 | BT | 22/07/2014 |
01603 963 | IOVOX Limited | 23/10/2014 |
01603 964 | BT | 10/03/2015 |
01603 965 | Media Hawk Ltd | 11/11/2015 |
01603 966 | Affiniti Integrated Solutions Limited | 19/11/2015 |
01603 967 | Gamma Telecom Holdings Ltd | 19/10/2015 |
01603 969 | Media Hawk Ltd | 25/11/2015 |
01603 970 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 21/01/2020 |
01603 971 | BT | 15/05/2017 |
01603 972 | Colt Technology Services | 26/03/2020 |
01603 973 | Colt Technology Services | 02/05/2017 |
01603 974 | Gamma Telecom Holdings Ltd | 20/09/2017 |
01603 975 | IP Voice Networks Ltd | 20/09/2017 |
01603 976 | DIDWW Ireland Limited | 19/10/2017 |
01603 977 | Gamma Telecom Holdings Ltd | 20/12/2016 |
01603 978 | Gamma Telecom Holdings Ltd | 30/06/2017 |
01603 979 | Number Services Ltd. | 22/11/2018 |
01603 980 | Gamma Telecom Holdings Ltd | 30/11/2017 |
01603 981 | BT | 30/11/2017 |
01603 982 | Entanet International Ltd | 05/12/2017 |
01603 983 | Antheus Telecom Limited | 06/02/2018 |
01603 984 | Gamma Telecom Holdings Ltd | 08/03/2018 |
01603 985 | Colt Technology Services | 14/04/2020 |
01603 986 | BT | 10/01/2020 |
01603 987 | Gamma Telecom Holdings Ltd | 30/04/2020 |
01603 988 | Belgacom International Carrier Services SA | 09/04/2020 |
01603 989 | Gamma Telecom Holdings Ltd | 03/03/2020 |