01536 06 | NFON UK Ltd | 18/09/2017 |
01536 20 | BT | 15/07/1994 |
01536 21 | Gamma Telecom Holdings Ltd | 19/04/2004 |
01536 22 | Redcentric Solutions Limited | 05/06/2015 |
01536 230 | Linear Telecoms Limited | 12/10/2010 |
01536 231 | API Telecom Limited | 30/03/2012 |
01536 232 | ICC Networks Ltd | 17/04/2012 |
01536 233 | Sky UK Limited | 02/07/2013 |
01536 234 | Ziron Limited | 01/08/2012 |
01536 235 | IOVOX Limited | 03/07/2012 |
01536 237 | Sky UK Limited | 02/07/2013 |
01536 238 | TalkTalk Communications Limited | 12/07/2012 |
01536 239 | TalkTalk Communications Limited | 01/05/2012 |
01536 25 | TGL Services (UK) Ltd | 02/02/2015 |
01536 26 | BT | 15/07/1994 |
01536 27 | BT | 15/07/1994 |
01536 280 | GTT-EMEA LTD | 14/10/2021 |
01536 285 | GTT-EMEA LTD | 14/10/2021 |
01536 286 | GTT-EMEA LTD | 14/10/2021 |
01536 287 | GTT-EMEA LTD | 14/10/2021 |
01536 290 | Orange Business Holdings UK Limited | 08/06/2017 |
01536 291 | TalkTalk Communications Limited | 06/07/2017 |
01536 292 | IP Voice Networks Ltd | 20/09/2017 |
01536 293 | NFON UK Ltd | 18/09/2017 |
01536 294 | Entanet International Ltd | 12/12/2017 |
01536 295 | Gamma Telecom Holdings Ltd | 03/07/2018 |
01536 296 | Fuse 2 Communications Ltd | 03/07/2017 |
01536 297 | Sky UK Limited | 02/10/2018 |
01536 298 | Club Communications Ltd | 31/07/2018 |
01536 299 | Number Services Ltd. | 22/11/2018 |
01536 303 | Six Degrees Technology Group Limited | 03/04/2020 |
01536 31 | BT | 15/07/1994 |
01536 33 | BT | 15/07/1994 |
01536 34 | BT | 26/01/1995 |
01536 35 | Virgin Media Limited | 28/08/1998 |
01536 36 | Served Up Limited | 27/05/2008 |
01536 37 | BT | 15/07/1994 |
01536 38 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 39 | Virgin Media Limited | 15/07/1994 |
01536 40 | BT | 15/07/1994 |
01536 41 | BT | 15/07/1994 |
01536 42 | BT | 15/07/1994 |
01536 43 | Affiniti Integrated Solutions Limited | 10/05/2005 |
01536 44 | BT | 15/07/1994 |
01536 45 | BT | 15/07/1994 |
01536 46 | BT | 15/07/1994 |
01536 47 | Syntec Limited | 07/12/2005 |
01536 48 | BT | 01/07/1997 |
01536 49 | BT | 15/07/1994 |
01536 50 | Virgin Media Limited | 02/08/1995 |
01536 51 | BT | 15/07/1994 |
01536 52 | BT | 15/07/1994 |
01536 53 | BT | 15/07/1994 |
01536 54 | GCI Network Solutions Ltd | 02/05/2017 |
01536 560 | Inclarity Communications Limited | 08/11/2012 |
01536 561 | Inclarity Communications Limited | 08/11/2012 |
01536 562 | Inclarity Communications Limited | 08/11/2012 |
01536 565 | Inclarity Communications Limited | 08/11/2012 |
01536 570 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 571 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 572 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 573 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 574 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 575 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 576 | Vodafone Ltd (C&W) | 05/09/2013 |
01536 58 | FleXtel Limited | 21/10/2005 |
01536 600 | Localphone Limited | 04/05/2007 |
01536 601 | TalkTalk Communications Limited | 07/08/2007 |
01536 603 | (AQ) LIMITED | 19/10/2011 |
01536 604 | Net-Work Internet Ltd | 24/09/2007 |
01536 605 | Voiceflex Limited | 27/09/2007 |
01536 606 | Nationwide Telephone Assistance Ltd | 02/10/2007 |
01536 607 | VoIP-Un Limited | 31/10/2007 |
01536 608 | Verizon UK Limited | 18/12/2007 |
01536 609 | AQL Wholesale Ltd | 04/01/2008 |
01536 610 | Digital Space Group Limited | 15/03/2016 |
01536 611 | Vodafone Ltd (Energis) | 11/01/2008 |
01536 614 | Voxbone SA | 24/01/2008 |
01536 615 | Digital Space Group Limited | 01/05/2008 |
01536 616 | Telecom2 Limited | 11/09/2009 |
01536 617 | Nodemax Limited | 16/07/2008 |
01536 618 | TalkTalk Communications Limited | 12/02/2013 |
01536 620 | Pulsant (Scotland) Limited | 17/02/2009 |
01536 622 | Solutios Limited | 27/10/2008 |
01536 623 | Mars Communications Limited | 05/02/2009 |
01536 624 | IPV6 Limited | 12/02/2009 |
01536 625 | Andrews & Arnold (Numbers) Ltd | 19/03/2009 |
01536 626 | Sky UK Limited | 02/07/2013 |
01536 627 | Telecoms World PLC | 15/04/2009 |
01536 628 | TalkTalk Communications Limited | 20/03/2009 |
01536 629 | Calltracks Limited | 20/09/2013 |
01536 630 | CFL Communications Ltd | 13/07/2009 |
01536 631 | Vectone Mobile Limited | 30/06/2009 |
01536 633 | Nexus Telecommunications Limited | 28/09/2009 |
01536 636 | I-NET COMMUNICATIONS GROUP PLC | 13/01/2010 |
01536 638 | GCI Network Solutions Ltd | 25/04/2017 |
01536 639 | Buzz Networks Limited | 01/03/2010 |
01536 640 | Digitech Solutions Global Limited | 27/04/2010 |
01536 641 | Suretec Systems Ltd | 06/05/2010 |
01536 642 | Atomstream Limited | 24/03/2010 |
01536 643 | Core Telecom Limited | 05/08/2010 |
01536 644 | Telappliant Ltd | 16/06/2010 |
01536 645 | Simwood eSMS Limited | 09/08/2010 |
01536 646 | Windsor Telecom Ltd | 22/07/2010 |
01536 647 | Inet Telecoms Ltd (Voipfone) | 19/08/2010 |
01536 648 | VoiceHost Limited | 05/10/2010 |
01536 649 | Sky UK Limited | 02/07/2013 |
01536 650 | Numbergroup Utilities Ltd | 04/11/2010 |
01536 651 | Telephone Box Limited | 10/12/2010 |
01536 653 | Phone Co-Op Numbering Limited | 22/12/2010 |
01536 654 | IP Wholesale Limited | 01/06/2017 |
01536 656 | Invosys Limited | 11/04/2012 |
01536 657 | Minotaur Telecom Limited | 31/01/2013 |
01536 658 | Nexbridge Communications Limited | 07/03/2012 |
01536 659 | Sky UK Limited | 02/07/2013 |
01536 660 | TalkTalk Communications Limited | 13/07/2011 |
01536 661 | Orbtalk Limited | 12/09/2011 |
01536 662 | Hello Telecom (UK) Limited | 11/11/2011 |
01536 663 | Internexus Networks Limited | 21/11/2011 |
01536 665 | Invoco Ltd | 26/09/2011 |
01536 666 | TESLA LOGIC LTD | 21/04/2021 |
01536 668 | Bicom Systems EURL | 05/03/2012 |
01536 669 | Sky UK Limited | 02/07/2013 |
01536 670 | Content Guru Limited | 12/10/2012 |
01536 671 | Sky UK Limited | 02/07/2013 |
01536 672 | Storacall Technology Limited | 11/04/2013 |
01536 673 | Media Hawk Ltd | 19/04/2013 |
01536 674 | Kalnet4U Ltd | 23/05/2013 |
01536 675 | Sky UK Limited | 16/12/2014 |
01536 676 | Numbers Plus Ltd | 14/02/2013 |
01536 677 | Intrado Cloud Solutions Limited | 15/01/2013 |
01536 678 | Sky UK Limited | 12/06/2013 |
01536 679 | XoverX Ltd | 30/04/2013 |
01536 680 | BT | 24/10/2013 |
01536 681 | Sky UK Limited | 09/08/2013 |
01536 682 | Vonage Limited | 27/01/2015 |
01536 683 | Sky UK Limited | 09/08/2013 |
01536 684 | Colt Technology Services | 17/04/2015 |
01536 685 | TalkTalk Communications Limited | 31/07/2014 |
01536 686 | iHub 2 Limited | 18/05/2016 |
01536 687 | M247 Ltd | 18/05/2015 |
01536 688 | Redwood Technologies Ltd | 15/11/2018 |
01536 689 | YayYay Limited | 23/04/2015 |
01536 691 | Sky UK Limited | 24/07/2015 |
01536 693 | Sky UK Limited | 24/12/2015 |
01536 694 | Adepteo Limited | 21/12/2016 |
01536 695 | Alnitak GmbH | 31/08/2016 |
01536 696 | I.T Communications Limited | 21/03/2016 |
01536 697 | Colt Technology Services | 13/08/2018 |
01536 698 | Zapappi Ltd | 05/01/2018 |
01536 70 | Commi Holdings Limited | 21/11/2016 |
01536 71 | BT | 15/07/1994 |
01536 72 | BT | 15/07/1994 |
01536 73 | Magrathea Telecommunications Limited | 24/09/2004 |
01536 74 | BT | 15/07/1994 |
01536 750 | Vodafone Ltd (Thus) | 04/01/2012 |
01536 751 | Vodafone Ltd (Thus) | 04/01/2012 |
01536 752 | Vodafone Ltd (Thus) | 04/01/2012 |
01536 753 | Vodafone Ltd (Thus) | 04/01/2012 |
01536 758 | Vodafone Ltd (Thus) | 04/01/2012 |
01536 759 | Vodafone Ltd (Thus) | 04/01/2012 |
01536 76 | BT | 15/07/1994 |
01536 77 | BT | 15/07/1994 |
01536 789 | Vodafone Ltd (C&W) | 10/08/2015 |
01536 79 | BT | 15/07/1994 |
01536 81 | TGL Services (UK) Ltd | 02/02/2015 |
01536 82 | Barritel Limited | 17/08/2006 |
01536 84 | TelNG Limited | 28/02/2007 |
01536 850 | BT | 06/06/2019 |
01536 851 | Gamma Telecom Holdings Ltd | 04/01/2019 |
01536 852 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 17/01/2020 |
01536 853 | Colt Technology Services | 21/07/2021 |
01536 854 | SiPalto Ltd | 17/06/2020 |
01536 855 | ICUK Computing Services Limited | 20/09/2019 |
01536 856 | BT | 23/09/2020 |
01536 857 | Twilio Ireland Limited | 08/04/2021 |
01536 858 | DIDWW Ireland Limited | 22/01/2019 |
01536 859 | Gamma Telecom Holdings Ltd | 22/09/2021 |
01536 86 | TTNC Limited | 11/11/2013 |
01536 877 | Spitfire Network Services Limited | 10/11/2011 |
01536 880 | Lumen Technologies UK Limited | 09/09/1999 |
01536 883 | Lumen Technologies UK Limited | 09/09/1999 |
01536 889 | Lumen Technologies UK Limited | 09/09/1999 |
01536 890 | Resilient PLC | 18/05/2012 |
01536 891 | Resilient PLC | 18/05/2012 |
01536 899 | Resilient PLC | 18/05/2012 |
01536 900 | Dial 9 Communications Limited | 10/12/2019 |
01536 901 | Lanonyx Telecom Limited | 10/08/2021 |
01536 902 | VOXYONDER NETWORK SERVICES UK LTD | 10/09/2020 |
01536 903 | Gamma Telecom Holdings Ltd | 10/03/2020 |
01536 904 | Gamma Telecom Holdings Ltd | 05/07/2021 |
01536 905 | Mi Telecom Limited | 03/07/2020 |
01536 906 | Gamma Telecom Holdings Ltd | 11/03/2021 |
01536 907 | Gamma Telecom Holdings Ltd | 17/12/2020 |
01536 908 | Belgacom International Carrier Services SA | 06/02/2020 |
01536 909 | Gamma Telecom Holdings Ltd | 01/08/2019 |