01424 20 | BT | 18/04/1997 |
01424 21 | BT | 15/07/1994 |
01424 22 | BT | 15/07/1994 |
01424 23 | Gamma Telecom Holdings Ltd | 13/03/2004 |
01424 240 | Inclarity Communications Limited | 07/11/2012 |
01424 241 | Inclarity Communications Limited | 07/11/2012 |
01424 242 | Inclarity Communications Limited | 07/11/2012 |
01424 245 | Inclarity Communications Limited | 07/11/2012 |
01424 247 | Inclarity Communications Limited | 07/11/2012 |
01424 25 | Sky UK Limited | 02/07/2013 |
01424 270 | Linear Telecoms Limited | 08/10/2010 |
01424 271 | Sky UK Limited | 13/04/2021 |
01424 272 | TalkTalk Communications Limited | 13/07/2011 |
01424 273 | Orbtalk Limited | 15/09/2011 |
01424 274 | Hello Telecom (UK) Limited | 10/11/2011 |
01424 275 | Internexus Networks Limited | 21/11/2011 |
01424 276 | Bicom Systems EURL | 02/03/2012 |
01424 278 | API Telecom Limited | 29/03/2012 |
01424 279 | ICC Networks Ltd | 13/04/2012 |
01424 280 | Lanonyx Telecom Limited | 10/08/2021 |
01424 283 | Hyperoptic Ltd | 13/09/2021 |
01424 29 | FleXtel Limited | 26/10/2005 |
01424 300 | Simwood eSMS Limited | 09/08/2010 |
01424 301 | VoiceHost Limited | 27/09/2010 |
01424 302 | Telephone Box Limited | 25/11/2010 |
01424 304 | Phone Co-Op Numbering Limited | 22/12/2010 |
01424 306 | Invosys Limited | 26/01/2012 |
01424 307 | IP Wholesale Limited | 01/06/2017 |
01424 308 | Nexbridge Communications Limited | 07/03/2012 |
01424 309 | Minotaur Telecom Limited | 01/02/2013 |
01424 310 | Vonage Limited | 27/01/2015 |
01424 311 | Ziron Limited | 30/07/2012 |
01424 312 | Content Guru Limited | 15/10/2012 |
01424 314 | Intrado Cloud Solutions Limited | 15/01/2013 |
01424 315 | Media Hawk Ltd | 11/04/2013 |
01424 316 | TalkTalk Communications Limited | 21/11/2012 |
01424 317 | IOVOX Limited | 03/07/2012 |
01424 318 | XoverX Ltd | 30/04/2013 |
01424 319 | TalkTalk Communications Limited | 01/05/2012 |
01424 345 | GTT-EMEA LTD | 13/10/2021 |
01424 346 | GTT-EMEA LTD | 13/10/2021 |
01424 347 | GTT-EMEA LTD | 13/10/2021 |
01424 377 | Spitfire Network Services Limited | 10/11/2011 |
01424 38 | Citrus Telecommunications Ltd | 11/04/2006 |
01424 39 | TTNC Limited | 11/11/2013 |
01424 40 | AQL Wholesale Ltd | 01/11/2004 |
01424 41 | Served Up Limited | 23/05/2008 |
01424 42 | BT | 15/07/1994 |
01424 43 | BT | 15/07/1994 |
01424 44 | BT | 15/07/1994 |
01424 45 | BT | 15/07/1994 |
01424 46 | BT | 15/07/1994 |
01424 470 | Vodafone Ltd (Thus) | 16/01/2012 |
01424 471 | Vodafone Ltd (Thus) | 16/01/2012 |
01424 472 | Vodafone Ltd (Thus) | 16/01/2012 |
01424 473 | Vodafone Ltd (Thus) | 16/01/2012 |
01424 478 | Vodafone Ltd (Thus) | 16/01/2012 |
01424 479 | Vodafone Ltd (C&W) | 01/04/2019 |
01424 480 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 481 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 482 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 483 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 484 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 486 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 488 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 49 | GCI Network Solutions Ltd | 25/04/2017 |
01424 51 | TelNG Limited | 27/02/2007 |
01424 52 | Verizon UK Limited | 18/04/2007 |
01424 530 | Barritel Limited | 07/06/2007 |
01424 531 | (AQ) LIMITED | 11/09/2012 |
01424 532 | TalkTalk Communications Limited | 28/08/2007 |
01424 533 | Voiceflex Limited | 30/07/2007 |
01424 534 | Digital Space Group Limited | 15/03/2016 |
01424 535 | VoIP-Un Limited | 29/10/2007 |
01424 536 | Telecom2 Limited | 11/09/2009 |
01424 537 | Invade International Ltd | 12/01/2016 |
01424 538 | Nodemax Limited | 15/07/2008 |
01424 539 | TalkTalk Communications Limited | 12/02/2013 |
01424 540 | Localphone Limited | 04/05/2007 |
01424 541 | Voxbone SA | 18/09/2008 |
01424 543 | Solutios Limited | 07/10/2008 |
01424 544 | Entanet International Ltd | 20/12/2007 |
01424 547 | TalkTalk Communications Limited | 06/01/2015 |
01424 548 | IPV6 Limited | 04/02/2009 |
01424 549 | Mars Communications Limited | 12/02/2009 |
01424 550 | Andrews & Arnold (Numbers) Ltd | 05/03/2009 |
01424 551 | Telecoms World PLC | 13/03/2009 |
01424 552 | TalkTalk Communications Limited | 20/03/2009 |
01424 553 | Vectone Mobile Limited | 06/07/2009 |
01424 554 | Affiniti Integrated Solutions Limited | 12/11/2007 |
01424 555 | Redcentric Solutions Limited | 05/06/2015 |
01424 556 | CFL Communications Ltd | 10/07/2009 |
01424 558 | Nexus Telecommunications Limited | 25/09/2009 |
01424 559 | Inet Telecoms Ltd (Voipfone) | 30/11/2009 |
01424 560 | GCI Network Solutions Ltd | 19/04/2017 |
01424 561 | I-NET COMMUNICATIONS GROUP PLC | 15/01/2010 |
01424 563 | Buzz Networks Limited | 01/03/2010 |
01424 565 | E164 Ltd | 01/03/2010 |
01424 566 | Atomstream Limited | 22/03/2010 |
01424 568 | Digitech Solutions Global Limited | 24/03/2010 |
01424 569 | Calltracks Limited | 20/09/2013 |
01424 570 | Suretec Systems Ltd | 06/05/2010 |
01424 571 | Numbergroup Utilities Ltd | 02/11/2010 |
01424 572 | Telappliant Ltd | 02/06/2010 |
01424 573 | Core Telecom Limited | 05/08/2010 |
01424 574 | Windsor Telecom Ltd | 21/07/2010 |
01424 575 | Kalnet4U Ltd | 16/05/2013 |
01424 576 | TalkTalk Communications Limited | 26/03/2014 |
01424 577 | iHub 2 Limited | 18/05/2016 |
01424 578 | Redwood Technologies Ltd | 15/11/2018 |
01424 579 | I.T Communications Limited | 11/03/2015 |
01424 580 | Invoco Ltd | 18/10/2013 |
01424 581 | Colt Technology Services | 22/04/2015 |
01424 582 | M247 Ltd | 19/05/2015 |
01424 583 | Sky UK Limited | 20/01/2016 |
01424 584 | Sky UK Limited | 02/09/2015 |
01424 585 | Affiniti Integrated Solutions Limited | 19/06/2014 |
01424 587 | YayYay Limited | 23/04/2015 |
01424 588 | Digital Space Group Limited | 30/11/2007 |
01424 590 | Resilient PLC | 18/05/2012 |
01424 591 | Resilient PLC | 18/05/2012 |
01424 599 | Resilient PLC | 18/05/2012 |
01424 601 | Sky UK Limited | 06/12/2016 |
01424 602 | TalkTalk Communications Limited | 03/07/2017 |
01424 603 | Fuse 2 Communications Ltd | 04/07/2017 |
01424 604 | Mintaka Limited | 26/09/2016 |
01424 605 | IP Voice Networks Ltd | 20/09/2017 |
01424 606 | Adepteo Limited | 17/01/2017 |
01424 607 | Zapappi Ltd | 05/01/2018 |
01424 608 | Number Services Ltd. | 22/11/2018 |
01424 610 | Orbital Net Limited | 19/08/2020 |
01424 611 | Colt Technology Services | 28/01/2021 |
01424 612 | BT | 08/10/2020 |
01424 613 | Gamma Telecom Holdings Ltd | 19/10/2021 |
01424 614 | Gamma Telecom Holdings Ltd | 22/09/2021 |
01424 615 | VOXYONDER NETWORK SERVICES UK LTD | 10/09/2020 |
01424 616 | Mi Telecom Limited | 06/07/2020 |
01424 617 | Gamma Telecom Holdings Ltd | 11/05/2021 |
01424 618 | Belgacom International Carrier Services SA | 21/10/2020 |
01424 619 | Gamma Telecom Holdings Ltd | 16/12/2020 |
01424 707 | Net-Work Internet Ltd | 24/09/2007 |
01424 709 | Nationwide Telephone Assistance Ltd | 01/10/2007 |
01424 71 | BT | 15/07/1994 |
01424 72 | BT | 15/07/1994 |
01424 73 | BT | 15/07/1994 |
01424 74 | Syntec Limited | 01/03/2005 |
01424 75 | BT | 15/07/1994 |
01424 760 | Six Degrees Technology Group Limited | 14/01/2020 |
01424 762 | Six Degrees Technology Group Limited | 14/01/2020 |
01424 764 | Six Degrees Technology Group Limited | 14/01/2020 |
01424 77 | BT | 15/07/1994 |
01424 78 | BT | 15/07/1994 |
01424 79 | Vodafone Ltd (C&W) | 02/09/2013 |
01424 80 | TGL Services (UK) Ltd | 02/02/2015 |
01424 81 | BT | 15/07/1994 |
01424 83 | BT | 15/07/1994 |
01424 84 | BT | 15/07/1994 |
01424 85 | BT | 15/07/1994 |
01424 86 | Magrathea Telecommunications Limited | 24/09/2004 |
01424 87 | BT | 15/07/1994 |
01424 88 | BT | 15/07/1994 |
01424 89 | BT | 15/07/1994 |
01424 900 | Beaming Limited | 21/03/2018 |
01424 901 | Club Communications Ltd | 03/07/2018 |
01424 902 | Sky UK Limited | 12/02/2019 |
01424 903 | TalkTalk Communications Limited | 10/06/2019 |
01424 904 | Colt Technology Services | 27/03/2019 |
01424 905 | BT | 16/08/2019 |
01424 906 | ICUK Computing Services Limited | 20/09/2019 |
01424 907 | Dial 9 Communications Limited | 10/12/2019 |
01424 908 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 17/01/2020 |
01424 909 | DIDWW Ireland Limited | 18/01/2019 |