01743 20 | Vodafone Ltd (Energis) | 26/05/2006 |
01743 21 | BT | 15/07/1994 |
01743 220 | Adepteo Limited | 06/12/2016 |
01743 221 | Sky UK Limited | 20/04/2017 |
01743 223 | Number Services Ltd. | 22/11/2018 |
01743 224 | IP Voice Networks Ltd | 20/09/2017 |
01743 225 | Calltracks Limited | 23/08/2017 |
01743 226 | Media Hawk Ltd | 23/10/2017 |
01743 228 | Entanet International Ltd | 12/12/2017 |
01743 229 | NFON UK Ltd | 20/09/2017 |
01743 23 | BT | 15/07/1994 |
01743 24 | BT | 15/07/1994 |
01743 25 | BT | 15/07/1994 |
01743 26 | BT | 15/07/1994 |
01743 27 | BT | 15/07/1994 |
01743 28 | BT | 17/12/1998 |
01743 29 | Gamma Telecom Holdings Ltd | 13/03/2004 |
01743 303 | Digital Space Group Limited | 12/04/2016 |
01743 32 | Redcentric Solutions Limited | 05/06/2015 |
01743 339 | Vodafone Ltd (C&W) | 10/08/2015 |
01743 34 | BT | 15/07/1994 |
01743 35 | BT | 15/07/1994 |
01743 36 | BT | 15/07/1994 |
01743 377 | Spitfire Network Services Limited | 11/11/2011 |
01743 380 | Linear Telecoms Limited | 18/10/2010 |
01743 382 | Orbtalk Limited | 21/09/2011 |
01743 383 | Sky UK Limited | 24/06/2013 |
01743 384 | TalkTalk Communications Limited | 12/02/2013 |
01743 386 | Internexus Networks Limited | 22/11/2011 |
01743 387 | Inet Telecoms Ltd (Voipfone) | 17/10/2011 |
01743 388 | Hello Telecom (UK) Limited | 23/11/2011 |
01743 390 | Resilient PLC | 18/05/2012 |
01743 391 | Resilient PLC | 18/05/2012 |
01743 399 | Resilient PLC | 18/05/2012 |
01743 40 | Affiniti Integrated Solutions Limited | 07/02/2002 |
01743 410 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 411 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 412 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 413 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 414 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 415 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 416 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 43 | FleXtel Limited | 11/11/2005 |
01743 44 | BT | 15/07/1994 |
01743 45 | BT | 15/07/1994 |
01743 46 | BT | 15/07/1994 |
01743 47 | Vodafone Ltd (Thus) | 25/01/2012 |
01743 48 | TelNG Limited | 28/02/2007 |
01743 49 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 50 | Verizon UK Limited | 18/04/2007 |
01743 510 | Inclarity Communications Limited | 25/02/2013 |
01743 511 | Inclarity Communications Limited | 25/02/2013 |
01743 512 | Inclarity Communications Limited | 09/11/2012 |
01743 515 | Inclarity Communications Limited | 25/02/2013 |
01743 516 | Inclarity Communications Limited | 25/02/2013 |
01743 52 | Barritel Limited | 23/06/2006 |
01743 530 | Digitech Solutions Global Limited | 26/06/2012 |
01743 531 | API Telecom Limited | 10/04/2012 |
01743 532 | Bicom Systems EURL | 01/03/2012 |
01743 533 | ICC Networks Ltd | 16/04/2012 |
01743 534 | IOVOX Limited | 04/07/2012 |
01743 535 | Ziron Limited | 31/07/2012 |
01743 537 | TalkTalk Communications Limited | 04/04/2012 |
01743 538 | Content Guru Limited | 12/10/2012 |
01743 539 | AVC One Limited | 12/02/2014 |
01743 54 | TTNC Limited | 12/11/2013 |
01743 56 | AQL Wholesale Ltd | 04/08/2006 |
01743 580 | Localphone Limited | 14/05/2007 |
01743 581 | (AQ) LIMITED | 26/09/2012 |
01743 582 | Nodemax Limited | 15/07/2008 |
01743 583 | Voiceflex Limited | 27/09/2007 |
01743 584 | Digital Space Group Limited | 20/05/2008 |
01743 585 | TelXL Ltd | 12/02/2008 |
01743 586 | Telephone Box Limited | 09/12/2010 |
01743 588 | TalkTalk Communications Limited | 22/05/2007 |
01743 590 | VoIP-Un Limited | 05/11/2007 |
01743 591 | IPV6 Limited | 06/02/2009 |
01743 592 | Solutios Limited | 25/11/2008 |
01743 593 | Telecom2 Limited | 11/09/2009 |
01743 594 | Mars Communications Limited | 06/02/2009 |
01743 595 | Net-Work Internet Ltd | 29/04/2008 |
01743 596 | Served Up Limited | 22/10/2008 |
01743 597 | Digital Space Group Limited | 15/03/2016 |
01743 598 | Voxbone SA | 25/09/2008 |
01743 599 | Nationwide Telephone Assistance Ltd | 22/10/2007 |
01743 600 | TalkTalk Communications Limited | 20/03/2009 |
01743 601 | Andrews & Arnold (Numbers) Ltd | 30/03/2009 |
01743 602 | Invade International Ltd | 13/01/2016 |
01743 603 | Vectone Mobile Limited | 01/07/2009 |
01743 604 | Telecoms World PLC | 09/06/2009 |
01743 605 | CFL Communications Ltd | 14/07/2009 |
01743 606 | GCI Network Solutions Ltd | 25/04/2017 |
01743 607 | Nexus Telecommunications Limited | 30/09/2009 |
01743 608 | GTT-EMEA LTD | 14/10/2021 |
01743 609 | TeleWare Group PLC | 08/01/2010 |
01743 611 | I-NET COMMUNICATIONS GROUP PLC | 15/01/2010 |
01743 612 | Buzz Networks Limited | 01/03/2010 |
01743 613 | Atomstream Limited | 29/03/2010 |
01743 614 | Sky UK Limited | 24/06/2013 |
01743 615 | Suretec Systems Ltd | 12/05/2010 |
01743 616 | Calltracks Limited | 23/09/2013 |
01743 617 | Windsor Telecom Ltd | 22/07/2010 |
01743 618 | Core Telecom Limited | 06/08/2010 |
01743 619 | Intrado Cloud Solutions Limited | 02/08/2010 |
01743 620 | Sky UK Limited | 24/06/2013 |
01743 621 | Media Hawk Ltd | 10/04/2013 |
01743 622 | TalkTalk Communications Limited | 17/12/2012 |
01743 623 | Simwood eSMS Limited | 16/04/2013 |
01743 624 | Kalnet4U Ltd | 30/05/2013 |
01743 625 | Sky UK Limited | 16/10/2013 |
01743 626 | Redwood Technologies Ltd | 15/11/2018 |
01743 627 | Vonage Limited | 27/01/2015 |
01743 628 | Metronet (UK) Limited | 21/05/2019 |
01743 629 | XoverX Ltd | 29/04/2013 |
01743 630 | YayYay Limited | 24/04/2015 |
01743 631 | I.T Communications Limited | 19/05/2015 |
01743 632 | Sky UK Limited | 02/09/2015 |
01743 633 | iHub 2 Limited | 18/05/2016 |
01743 635 | Internet of Things Limited | 13/08/2018 |
01743 636 | Colt Technology Services | 05/05/2015 |
01743 637 | Zapappi Ltd | 05/01/2018 |
01743 638 | Fuse 2 Communications Ltd | 03/07/2017 |
01743 639 | Virgin Media Limited | 19/03/2018 |
01743 640 | Telappliant Ltd | 05/04/2018 |
01743 641 | TalkTalk Communications Limited | 25/07/2018 |
01743 642 | Dial 9 Communications Limited | 08/01/2020 |
01743 643 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 21/01/2020 |
01743 644 | Colt Technology Services | 18/07/2018 |
01743 645 | SiPalto Ltd | 23/01/2020 |
01743 646 | Sky UK Limited | 08/09/2020 |
01743 647 | DIDWW Ireland Limited | 27/01/2020 |
01743 648 | Gamma Telecom Holdings Ltd | 22/08/2019 |
01743 649 | Club Communications Ltd | 21/09/2018 |
01743 650 | BT | 23/09/2020 |
01743 651 | BT | 28/06/2021 |
01743 656 | VOXYONDER NETWORK SERVICES UK LTD | 10/09/2020 |
01743 658 | Belgacom International Carrier Services SA | 24/04/2020 |
01743 660 | ICUK Computing Services Limited | 05/06/2020 |
01743 661 | Mi Telecom Limited | 03/07/2020 |
01743 662 | Lanonyx Telecom Limited | 10/08/2021 |
01743 664 | Gamma Telecom Holdings Ltd | 16/09/2020 |
01743 70 | BT | 15/07/1994 |
01743 71 | BT | 15/07/1994 |
01743 720 | Six Degrees Technology Group Limited | 14/01/2020 |
01743 724 | Six Degrees Technology Group Limited | 14/01/2020 |
01743 730 | VoiceHost Limited | 09/12/2010 |
01743 74 | BT | 15/07/1994 |
01743 75 | Vodafone Ltd (C&W) | 10/09/2013 |
01743 76 | BT | 15/07/1994 |
01743 77 | GCI Network Solutions Ltd | 26/04/2017 |
01743 78 | Syntec Limited | 01/03/2005 |
01743 79 | BT | 15/07/1994 |
01743 80 | TGL Services (UK) Ltd | 02/02/2015 |
01743 81 | Magrathea Telecommunications Limited | 24/09/2004 |
01743 82 | BT | 15/07/1994 |
01743 830 | Invoco Ltd | 22/09/2010 |
01743 832 | IP Wholesale Limited | 01/06/2017 |
01743 833 | Numbergroup Utilities Ltd | 04/11/2010 |
01743 834 | Lumen Technologies UK Limited | 24/08/2010 |
01743 835 | Phone Co-Op Numbering Limited | 23/12/2010 |
01743 837 | Minotaur Telecom Limited | 31/01/2013 |
01743 838 | Invosys Limited | 17/05/2012 |
01743 839 | Nexbridge Communications Limited | 09/03/2012 |
01743 84 | BT | 15/07/1994 |
01743 85 | BT | 15/07/1994 |
01743 86 | BT | 15/07/1994 |
01743 87 | BT | 15/07/1994 |
01743 88 | BT | 15/07/1994 |
01743 89 | BT | 15/07/1994 |