01253 14 | Virgin Media Limited | 16/03/2016 |
01253 20 | Gamma Telecom Holdings Ltd | 16/02/2004 |
01253 220 | Inclarity Communications Limited | 09/02/2011 |
01253 221 | Inclarity Communications Limited | 09/02/2011 |
01253 224 | BT | 10/03/2021 |
01253 225 | Inclarity Communications Limited | 09/02/2011 |
01253 23 | Redcentric Solutions Limited | 05/06/2015 |
01253 250 | TGL Services (UK) Ltd | 02/02/2015 |
01253 251 | TGL Services (UK) Ltd | 02/02/2015 |
01253 252 | TGL Services (UK) Ltd | 02/02/2015 |
01253 253 | TGL Services (UK) Ltd | 02/02/2015 |
01253 254 | TGL Services (UK) Ltd | 02/02/2015 |
01253 255 | Affiniti Integrated Solutions Limited | 29/04/2021 |
01253 256 | Gamma Telecom Holdings Ltd | 22/09/2021 |
01253 257 | BT | 28/06/2021 |
01253 259 | Fuse 2 Communications Ltd | 06/05/2021 |
01253 260 | FleXtel Limited | 27/06/2017 |
01253 261 | FleXtel Limited | 27/06/2017 |
01253 270 | Linear Telecoms Limited | 05/10/2010 |
01253 271 | Nexbridge Communications Limited | 10/01/2012 |
01253 272 | Simwood eSMS Limited | 01/02/2012 |
01253 273 | Sky UK Limited | 25/06/2013 |
01253 274 | TalkTalk Communications Limited | 24/02/2012 |
01253 275 | TalkTalk Communications Limited | 10/11/2014 |
01253 276 | IOVOX Limited | 03/04/2012 |
01253 277 | API Telecom Limited | 26/03/2012 |
01253 278 | ICC Networks Ltd | 12/04/2012 |
01253 279 | Sky UK Limited | 25/06/2013 |
01253 280 | TalkTalk Communications Limited | 03/09/2013 |
01253 281 | TelNG Limited | 28/02/2007 |
01253 282 | Commi Holdings Limited | 21/11/2016 |
01253 283 | TalkTalk Communications Limited | 13/03/2007 |
01253 284 | Virgin Media Limited | 01/09/2006 |
01253 285 | Virgin Media Limited | 01/09/2006 |
01253 286 | Localphone Limited | 24/04/2007 |
01253 287 | Spitfire Network Services Limited | 21/08/2006 |
01253 289 | Resilient PLC | 11/12/2006 |
01253 29 | BT | 15/07/1994 |
01253 30 | BT | 15/07/1994 |
01253 31 | Virgin Media Limited | 16/03/2016 |
01253 320 | GCI Network Solutions Ltd | 20/04/2017 |
01253 330 | BT | 22/02/2012 |
01253 331 | BT | 22/02/2012 |
01253 332 | BT | 22/02/2012 |
01253 333 | BT | 22/02/2012 |
01253 334 | Telappliant Ltd | 05/04/2018 |
01253 335 | Gamma Telecom Holdings Ltd | 03/04/2018 |
01253 336 | BT | 22/02/2012 |
01253 337 | BT | 22/02/2012 |
01253 338 | BT | 22/02/2012 |
01253 339 | BT | 22/02/2012 |
01253 34 | BT | 15/07/1994 |
01253 35 | BT | 15/07/1994 |
01253 360 | iHub 2 Limited | 18/05/2016 |
01253 361 | BT | 27/07/2009 |
01253 362 | BT | 27/07/2009 |
01253 363 | I-NET COMMUNICATIONS GROUP PLC | 12/01/2010 |
01253 364 | Liquid 11 Limited | 20/04/2010 |
01253 365 | TalkTalk Communications Limited | 15/02/2010 |
01253 366 | Buzz Networks Limited | 24/02/2010 |
01253 367 | Sky UK Limited | 25/06/2013 |
01253 368 | Intrado Cloud Solutions Limited | 23/08/2010 |
01253 369 | BT | 27/07/2009 |
01253 370 | BT | 31/07/2018 |
01253 371 | Sky UK Limited | 30/08/2018 |
01253 372 | Club Communications Ltd | 21/09/2018 |
01253 373 | Calltracks Limited | 14/03/2019 |
01253 374 | TalkTalk Communications Limited | 22/03/2019 |
01253 375 | BT | 06/06/2019 |
01253 376 | Gamma Telecom Holdings Ltd | 12/02/2019 |
01253 377 | Served Up Limited | 01/03/2013 |
01253 378 | Served Up Limited | 01/03/2013 |
01253 380 | TalkTalk Communications Limited | 02/05/2014 |
01253 381 | Invoco Ltd | 10/10/2014 |
01253 382 | BT | 21/05/2014 |
01253 384 | Vonage Limited | 27/01/2015 |
01253 39 | BT | 15/07/1994 |
01253 40 | BT | 15/07/1994 |
01253 41 | Vodafone Ltd (C&W) | 03/10/2013 |
01253 420 | Windsor Telecom Ltd | 18/11/2010 |
01253 421 | Sky UK Limited | 25/06/2013 |
01253 422 | Sky UK Limited | 25/06/2013 |
01253 423 | TalkTalk Communications Limited | 22/03/2011 |
01253 424 | Sky UK Limited | 25/06/2013 |
01253 425 | TalkTalk Communications Limited | 25/08/2011 |
01253 427 | Internexus Networks Limited | 18/11/2011 |
01253 428 | TalkTalk Communications Limited | 27/07/2012 |
01253 429 | Sky UK Limited | 25/06/2013 |
01253 434 | Six Degrees Technology Group Limited | 10/01/2020 |
01253 44 | Virgin Media Limited | 16/03/2016 |
01253 458 | Vodafone Ltd (C&W) | 20/07/2018 |
01253 459 | Vodafone Ltd (C&W) | 20/07/2018 |
01253 460 | Syntec Limited | 18/04/2013 |
01253 461 | Sky UK Limited | 03/12/2013 |
01253 462 | Kalnet4U Ltd | 08/05/2013 |
01253 463 | Sky UK Limited | 03/12/2013 |
01253 464 | Affiniti Integrated Solutions Limited | 10/06/2013 |
01253 465 | TalkTalk Communications Limited | 19/06/2013 |
01253 466 | Sky UK Limited | 25/07/2013 |
01253 467 | TalkTalk Communications Limited | 17/12/2013 |
01253 468 | BT | 04/12/2013 |
01253 469 | Redwood Technologies Ltd | 15/11/2018 |
01253 47 | Virgin Media Limited | 16/03/2016 |
01253 480 | Telecom2 Limited | 11/09/2009 |
01253 481 | Invade International Ltd | 12/01/2016 |
01253 482 | Nodemax Limited | 08/07/2008 |
01253 484 | Net-Work Internet Ltd | 18/07/2008 |
01253 486 | Inet Telecoms Ltd (Voipfone) | 24/09/2008 |
01253 489 | Colt Technology Services | 17/04/2015 |
01253 49 | TTNC Limited | 25/11/2013 |
01253 50 | BT | 15/07/1994 |
01253 511 | Barritel Limited | 13/06/2014 |
01253 512 | Barritel Limited | 13/06/2014 |
01253 520 | IOVOX Limited | 21/09/2015 |
01253 521 | Sky UK Limited | 07/09/2015 |
01253 522 | Sky UK Limited | 07/09/2015 |
01253 523 | Gamma Telecom Holdings Ltd | 08/04/2016 |
01253 524 | Alnitak GmbH | 10/06/2016 |
01253 53 | AQL Wholesale Ltd | 01/11/2004 |
01253 540 | TalkTalk Communications Limited | 07/04/2017 |
01253 541 | Number Services Ltd. | 22/11/2018 |
01253 542 | Gamma Telecom Holdings Ltd | 20/09/2017 |
01253 543 | BT | 02/10/2017 |
01253 544 | DIDWW Ireland Limited | 16/11/2016 |
01253 545 | IOVOX Limited | 23/12/2016 |
01253 546 | TalkTalk Communications Limited | 24/11/2017 |
01253 547 | Gamma Telecom Holdings Ltd | 20/12/2016 |
01253 548 | Entanet International Ltd | 05/12/2017 |
01253 549 | Invosys Limited | 23/08/2017 |
01253 560 | Vodafone Ltd (Thus) | 17/01/2012 |
01253 567 | Vodafone Ltd (Thus) | 19/03/2012 |
01253 569 | Vodafone Ltd (Thus) | 17/01/2012 |
01253 570 | Vodafone Ltd (C&W) | 28/06/2013 |
01253 572 | Vodafone Ltd (C&W) | 28/06/2013 |
01253 573 | Sky UK Limited | 10/06/2016 |
01253 574 | Sky UK Limited | 27/10/2016 |
01253 576 | Antheus Telecom Limited | 07/02/2018 |
01253 578 | I.T Communications Limited | 20/11/2015 |
01253 579 | Colt Technology Services | 23/02/2018 |
01253 580 | Sky UK Limited | 24/05/2019 |
01253 581 | Belgacom International Carrier Services SA | 03/10/2019 |
01253 582 | Sky UK Limited | 04/11/2019 |
01253 583 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 17/01/2020 |
01253 584 | BT | 09/03/2020 |
01253 587 | Gamma Telecom Holdings Ltd | 20/04/2020 |
01253 588 | ICUK Computing Services Limited | 12/08/2019 |
01253 589 | Gamma Telecom Holdings Ltd | 18/10/2019 |
01253 59 | BT | 15/07/1994 |
01253 60 | BT | 15/07/1994 |
01253 61 | BT | 15/07/1994 |
01253 62 | BT | 26/11/1997 |
01253 635 | IV Response Limited | 21/08/2014 |
01253 640 | BT | 27/07/2009 |
01253 642 | BT | 27/07/2009 |
01253 643 | BT | 27/07/2009 |
01253 649 | BT | 27/07/2009 |
01253 650 | Vodafone Ltd (C&W) | 20/07/2018 |
01253 651 | Vodafone Ltd (C&W) | 20/07/2018 |
01253 657 | Vodafone Ltd (C&W) | 20/07/2018 |
01253 658 | Vodafone Ltd (C&W) | 20/07/2018 |
01253 66 | BT | 15/07/1994 |
01253 670 | WAVECREST NETWORKS LIMITED | 16/12/2019 |
01253 675 | WAVECREST NETWORKS LIMITED | 16/12/2019 |
01253 68 | BT | 15/07/1994 |
01253 69 | BT | 15/07/1994 |
01253 700 | BT | 27/07/2009 |
01253 701 | BT | 27/07/2009 |
01253 702 | BT | 27/07/2009 |
01253 703 | BT | 27/07/2009 |
01253 704 | BT | 27/07/2009 |
01253 705 | BT | 27/07/2009 |
01253 706 | Sky UK Limited | 22/12/2020 |
01253 707 | Dial 9 Communications Limited | 12/10/2020 |
01253 708 | BT | 27/07/2009 |
01253 709 | BT | 27/07/2009 |
01253 71 | BT | 15/07/1994 |
01253 72 | BT | 15/07/1994 |
01253 73 | BT | 15/07/1994 |
01253 740 | BT | 27/07/2009 |
01253 741 | BT | 27/07/2009 |
01253 742 | Colt Technology Services | 27/05/2020 |
01253 743 | BT | 27/07/2009 |
01253 746 | Colt Technology Services | 12/10/2020 |
01253 747 | Gamma Telecom Holdings Ltd | 17/12/2020 |
01253 748 | SiPalto Ltd | 06/07/2020 |
01253 749 | BT | 27/07/2009 |
01253 750 | BT | 27/07/2009 |
01253 751 | BT | 27/07/2009 |
01253 752 | BT | 27/07/2009 |
01253 753 | BT | 27/07/2009 |
01253 754 | BT | 27/07/2009 |
01253 755 | BT | 27/07/2009 |
01253 756 | BT | 27/07/2009 |
01253 757 | BT | 27/07/2009 |
01253 758 | Mi Telecom Limited | 03/07/2020 |
01253 759 | BT | 23/09/2020 |
01253 76 | BT | 15/07/1994 |
01253 77 | BT | 15/07/1994 |
01253 780 | BT | 22/02/2012 |
01253 781 | BT | 22/02/2012 |
01253 782 | BT | 22/02/2012 |
01253 783 | BT | 22/02/2012 |
01253 784 | BT | 22/02/2012 |
01253 785 | BT | 22/02/2012 |
01253 788 | BT | 22/02/2012 |
01253 789 | BT | 22/02/2012 |
01253 79 | BT | 15/07/1994 |
01253 800 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 801 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 804 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 806 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 807 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 808 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 809 | Magrathea Telecommunications Limited | 16/11/2011 |
01253 810 | BT | 22/02/2012 |
01253 811 | BT | 22/02/2012 |
01253 812 | BT | 22/02/2012 |
01253 813 | BT | 22/02/2012 |
01253 814 | BT | 22/02/2012 |
01253 82 | BT | 15/07/1994 |
01253 830 | BT | 27/07/2009 |
01253 831 | BT | 27/07/2009 |
01253 832 | BT | 27/07/2009 |
01253 833 | BT | 27/07/2009 |
01253 834 | Gamma Telecom Holdings Ltd | 19/08/2020 |
01253 835 | Twilio Ireland Limited | 13/10/2020 |
01253 836 | BT | 27/07/2009 |
01253 837 | BT | 27/07/2009 |
01253 838 | BT | 27/07/2009 |
01253 839 | BT | 27/07/2009 |
01253 84 | Vodafone Ltd (C&W) | 03/10/2013 |
01253 85 | BT | 15/07/1994 |
01253 86 | BT | 15/07/1994 |
01253 87 | BT | 15/07/1994 |
01253 88 | BT | 15/07/1994 |
01253 89 | BT | 15/07/1994 |
01253 90 | Citrus Telecommunications Ltd | 11/04/2006 |
01253 913 | Digital Space Group Limited | 12/04/2016 |
01253 920 | (AQ) LIMITED | 17/10/2011 |
01253 921 | TalkTalk Communications Limited | 12/02/2013 |
01253 922 | Voiceflex Limited | 04/09/2007 |
01253 923 | Affiniti Integrated Solutions Limited | 15/10/2007 |
01253 925 | Digital Space Group Limited | 15/03/2016 |
01253 926 | Orange Business Holdings UK Limited | 26/02/2013 |
01253 927 | VoIP-Un Limited | 26/10/2007 |
01253 928 | Voxbone SA | 23/11/2007 |
01253 932 | TalkTalk Communications Limited | 26/01/2009 |
01253 933 | Sky UK Limited | 25/06/2013 |
01253 934 | Andrews & Arnold (Numbers) Ltd | 26/02/2009 |
01253 935 | Telecoms World PLC | 09/03/2009 |
01253 937 | GTT-EMEA LTD | 13/10/2021 |
01253 938 | Vectone Mobile Limited | 29/06/2009 |
01253 940 | BT | 21/05/2009 |
01253 941 | BT | 21/05/2009 |
01253 942 | BT | 21/05/2009 |
01253 943 | BT | 21/05/2009 |
01253 944 | BT | 21/05/2009 |
01253 945 | BT | 21/05/2009 |
01253 946 | BT | 21/05/2009 |
01253 947 | BT | 21/05/2009 |
01253 948 | BT | 21/05/2009 |
01253 949 | BT | 21/05/2009 |
01253 950 | BT | 21/05/2009 |
01253 951 | BT | 21/05/2009 |
01253 952 | BT | 21/05/2009 |
01253 953 | BT | 21/05/2009 |
01253 954 | BT | 21/05/2009 |
01253 955 | BT | 21/05/2009 |
01253 956 | BT | 21/05/2009 |
01253 957 | BT | 21/05/2009 |
01253 958 | BT | 21/05/2009 |
01253 959 | BT | 21/05/2009 |
01253 961 | TeleWare Group PLC | 14/08/2009 |
01253 963 | YayYay Limited | 24/04/2015 |
01253 964 | Verizon UK Limited | 09/11/2009 |
01253 965 | GCI Network Solutions Ltd | 19/04/2017 |
01253 966 | VoiceHost Limited | 26/08/2010 |
01253 968 | Numbergroup Utilities Ltd | 15/11/2010 |
01253 969 | Sky UK Limited | 25/06/2013 |
01253 971 | Numbers Plus Ltd | 13/02/2013 |
01253 972 | Media Hawk Ltd | 10/04/2013 |
01253 973 | Sky UK Limited | 17/07/2013 |
01253 974 | Sky UK Limited | 17/07/2013 |
01253 975 | Sky UK Limited | 25/07/2013 |
01253 976 | TalkTalk Communications Limited | 11/08/2015 |
01253 978 | BT | 02/09/2015 |
01253 979 | Affiniti Integrated Solutions Limited | 08/07/2015 |
01253 980 | Sky UK Limited | 25/06/2013 |
01253 981 | Hello Telecom (UK) Limited | 19/07/2012 |
01253 982 | Ziron Limited | 27/07/2012 |
01253 983 | Sky UK Limited | 25/06/2013 |
01253 984 | Content Guru Limited | 12/10/2012 |
01253 985 | Sky UK Limited | 25/06/2013 |
01253 986 | Sky UK Limited | 25/06/2013 |
01253 987 | TalkTalk Communications Limited | 02/11/2012 |