01233 20 | BT | 21/03/1995 |
01233 21 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 22 | Gamma Telecom Holdings Ltd | 13/03/2004 |
01233 230 | Linear Telecoms Limited | 04/10/2010 |
01233 232 | Internexus Networks Limited | 18/11/2011 |
01233 234 | Simwood eSMS Limited | 14/02/2012 |
01233 235 | Bicom Systems EURL | 02/03/2012 |
01233 236 | API Telecom Limited | 26/03/2012 |
01233 237 | ICC Networks Ltd | 12/04/2012 |
01233 238 | IOVOX Limited | 03/04/2012 |
01233 239 | Sky UK Limited | 21/06/2013 |
01233 25 | Syntec Limited | 15/11/2005 |
01233 26 | TGL Services (UK) Ltd | 02/02/2015 |
01233 270 | Numbergroup Utilities Ltd | 02/11/2010 |
01233 271 | TeleSurf Limited | 30/06/2010 |
01233 272 | Calltracks Limited | 19/09/2013 |
01233 273 | Windsor Telecom Ltd | 19/07/2010 |
01233 274 | Core Telecom Limited | 05/08/2010 |
01233 275 | Telephone Box Limited | 17/11/2010 |
01233 277 | VoiceHost Limited | 26/08/2010 |
01233 278 | Phone Co-Op Numbering Limited | 16/12/2010 |
01233 279 | Digital Mail Limited | 21/12/2010 |
01233 28 | WAVECREST NETWORKS LIMITED | 16/12/2019 |
01233 30 | Served Up Limited | 09/05/2008 |
01233 31 | IV Response Limited | 04/07/2005 |
01233 320 | Inclarity Communications Limited | 18/02/2011 |
01233 321 | Inclarity Communications Limited | 18/02/2011 |
01233 322 | Inclarity Communications Limited | 18/02/2011 |
01233 323 | Nexbridge Communications Limited | 06/03/2012 |
01233 324 | Firstsound Ltd | 11/04/2011 |
01233 325 | Inclarity Communications Limited | 18/02/2011 |
01233 326 | Media Hawk Ltd | 10/04/2013 |
01233 328 | Orbtalk Limited | 06/09/2011 |
01233 329 | Sky UK Limited | 21/06/2013 |
01233 33 | Virgin Media Limited | 05/01/1996 |
01233 340 | TalkTalk Communications Limited | 23/10/2014 |
01233 342 | Nexus Telecommunications Limited | 25/09/2009 |
01233 343 | GCI Network Solutions Ltd | 19/04/2017 |
01233 344 | Gamma Telecom Holdings Ltd | 11/03/2021 |
01233 345 | I-NET COMMUNICATIONS GROUP PLC | 12/01/2010 |
01233 347 | WIGHTFIBRE LIMITED | 21/01/2010 |
01233 348 | Atomstream Limited | 25/02/2010 |
01233 349 | Buzz Networks Limited | 01/03/2010 |
01233 350 | Intrado Cloud Solutions Limited | 19/02/2013 |
01233 351 | E164 Ltd | 22/03/2010 |
01233 352 | Suretec Systems Ltd | 29/04/2010 |
01233 353 | Digitech Solutions Global Limited | 23/04/2010 |
01233 355 | IP Wholesale Limited | 01/06/2017 |
01233 356 | Invosys Limited | 26/01/2012 |
01233 357 | Hello Telecom (UK) Limited | 15/02/2011 |
01233 358 | Minotaur Telecom Limited | 31/01/2013 |
01233 359 | Invoco Ltd | 21/09/2011 |
01233 360 | Ziron Limited | 27/07/2012 |
01233 361 | Vodafone Ltd (Thus) | 25/02/2013 |
01233 362 | Content Guru Limited | 12/10/2012 |
01233 363 | Verizon UK Limited | 17/10/2012 |
01233 364 | Affiniti Integrated Solutions Limited | 11/04/2013 |
01233 365 | Sky UK Limited | 21/06/2013 |
01233 367 | Kalnet4U Ltd | 08/05/2013 |
01233 368 | Liquid 11 Limited | 13/06/2013 |
01233 369 | XoverX Ltd | 01/05/2013 |
01233 37 | Redcentric Solutions Limited | 05/06/2015 |
01233 38 | GCI Network Solutions Ltd | 20/04/2017 |
01233 390 | Six Degrees Technology Group Limited | 10/01/2020 |
01233 394 | Six Degrees Technology Group Limited | 10/01/2020 |
01233 398 | Six Degrees Technology Group Limited | 10/01/2020 |
01233 41 | TelNG Limited | 26/02/2007 |
01233 420 | (AQ) LIMITED | 19/10/2011 |
01233 421 | TalkTalk Communications Limited | 12/02/2013 |
01233 422 | Orange Business Holdings UK Limited | 26/02/2013 |
01233 423 | Voiceflex Limited | 27/07/2007 |
01233 424 | VoIP-Un Limited | 25/10/2007 |
01233 425 | Solutios Limited | 27/08/2008 |
01233 426 | Telecom2 Limited | 11/09/2009 |
01233 427 | Inet Telecoms Ltd (Voipfone) | 17/11/2008 |
01233 428 | Affiniti Integrated Solutions Limited | 12/11/2007 |
01233 429 | Telecoms World PLC | 06/03/2009 |
01233 430 | Entanet International Ltd | 14/12/2007 |
01233 431 | Digital Space Group Limited | 15/03/2016 |
01233 434 | Nationwide Telephone Assistance Ltd | 01/10/2007 |
01233 435 | Nodemax Limited | 07/07/2008 |
01233 436 | IPV6 Limited | 27/01/2009 |
01233 437 | Mars Communications Limited | 03/02/2009 |
01233 438 | Voxbone SA | 04/12/2007 |
01233 439 | iHub 2 Limited | 18/05/2016 |
01233 44 | Commi Holdings Limited | 21/11/2016 |
01233 45 | Localphone Limited | 24/04/2007 |
01233 460 | Andrews & Arnold (Numbers) Ltd | 26/02/2009 |
01233 461 | Invade International Ltd | 12/01/2016 |
01233 462 | Vectone Mobile Limited | 29/06/2009 |
01233 463 | Sky UK Limited | 21/06/2013 |
01233 465 | CFL Communications Ltd | 07/07/2009 |
01233 466 | Net-Work Internet Ltd | 28/01/2008 |
01233 467 | Orbital Net Limited | 20/07/2009 |
01233 468 | Digital Space Group Limited | 29/11/2007 |
01233 469 | Telappliant Ltd | 29/01/2009 |
01233 487 | Spitfire Network Services Limited | 09/11/2011 |
01233 490 | Resilient PLC | 18/05/2012 |
01233 491 | Resilient PLC | 18/05/2012 |
01233 499 | Resilient PLC | 18/05/2012 |
01233 50 | BT | 15/07/1994 |
01233 510 | BT | 02/01/2014 |
01233 511 | Redwood Technologies Ltd | 15/11/2018 |
01233 512 | Vonage Limited | 27/01/2015 |
01233 513 | Sky UK Limited | 26/02/2015 |
01233 514 | I.T Communications Limited | 18/03/2015 |
01233 515 | Colt Technology Services | 12/09/2013 |
01233 516 | YayYay Limited | 21/04/2015 |
01233 517 | Lanonyx Telecom Limited | 03/03/2015 |
01233 518 | M247 Ltd | 29/05/2015 |
01233 519 | Sky UK Limited | 21/08/2013 |
01233 521 | Sky UK Limited | 24/12/2015 |
01233 523 | Mintaka Limited | 26/09/2016 |
01233 524 | Adepteo Limited | 16/01/2017 |
01233 526 | IOVOX Limited | 23/12/2016 |
01233 527 | Gamma Telecom Holdings Ltd | 15/05/2018 |
01233 528 | Gamma Telecom Holdings Ltd | 26/10/2018 |
01233 530 | Number Services Ltd. | 22/11/2018 |
01233 531 | Hyperoptic Ltd | 18/05/2018 |
01233 532 | Zapappi Ltd | 26/10/2017 |
01233 533 | Fuse 2 Communications Ltd | 03/07/2017 |
01233 534 | Colt Technology Services | 23/02/2018 |
01233 535 | IP Voice Networks Ltd | 20/09/2017 |
01233 536 | Sky UK Limited | 14/11/2018 |
01233 537 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 13/01/2020 |
01233 538 | Colt Technology Services | 04/02/2021 |
01233 539 | Club Communications Ltd | 18/05/2018 |
01233 540 | Dial 9 Communications Limited | 09/12/2019 |
01233 541 | DIDWW Ireland Limited | 27/01/2020 |
01233 542 | Twilio Ireland Limited | 29/09/2020 |
01233 543 | BT | 28/01/2021 |
01233 544 | Mi Telecom Limited | 03/07/2020 |
01233 546 | Media Hawk Ltd | 05/03/2021 |
01233 547 | Sky UK Limited | 13/04/2021 |
01233 548 | SiPalto Ltd | 11/06/2020 |
01233 550 | Affiniti Integrated Solutions Limited | 14/10/2019 |
01233 551 | VOXYONDER NETWORK SERVICES UK LTD | 10/09/2020 |
01233 552 | Gamma Telecom Holdings Ltd | 22/02/2021 |
01233 553 | ICUK Computing Services Limited | 12/08/2019 |
01233 554 | Gamma Telecom Holdings Ltd | 25/11/2020 |
01233 555 | Gamma Telecom Holdings Ltd | 01/08/2019 |
01233 556 | BT | 30/03/2020 |
01233 557 | Gamma Telecom Holdings Ltd | 25/02/2020 |
01233 558 | Belgacom International Carrier Services SA | 03/10/2019 |
01233 560 | Twilio Ireland Limited | 13/10/2021 |
01233 60 | Citrus Telecommunications Ltd | 09/08/2005 |
01233 61 | BT | 15/07/1994 |
01233 62 | BT | 15/07/1994 |
01233 63 | BT | 15/07/1994 |
01233 64 | BT | 15/07/1994 |
01233 65 | BT | 15/07/1994 |
01233 66 | BT | 15/07/1994 |
01233 670 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 671 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 672 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 673 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 674 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 675 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 679 | Vodafone Ltd (C&W) | 03/10/2013 |
01233 68 | FleXtel Limited | 19/10/2005 |
01233 69 | TTNC Limited | 11/11/2013 |
01233 700 | GTT-EMEA LTD | 14/10/2021 |
01233 705 | GTT-EMEA LTD | 14/10/2021 |
01233 706 | GTT-EMEA LTD | 14/10/2021 |
01233 707 | GTT-EMEA LTD | 14/10/2021 |
01233 709 | GTT-EMEA LTD | 14/10/2021 |
01233 71 | BT | 15/07/1994 |
01233 72 | BT | 15/07/1994 |
01233 73 | BT | 15/07/1994 |
01233 74 | BT | 15/07/1994 |
01233 75 | BT | 15/07/1994 |
01233 77 | BT | 15/07/1994 |
01233 78 | Barritel Limited | 16/02/2006 |
01233 793 | Digital Space Group Limited | 12/04/2016 |
01233 80 | AQL Wholesale Ltd | 01/11/2004 |
01233 81 | BT | 15/07/1994 |
01233 82 | BT | 15/07/1994 |
01233 84 | BT | 15/07/1994 |
01233 85 | BT | 15/07/1994 |
01233 86 | BT | 15/07/1994 |
01233 877 | TalkTalk Communications Limited | 17/01/2012 |
01233 878 | TalkTalk Communications Limited | 17/01/2012 |
01233 879 | TalkTalk Communications Limited | 17/01/2012 |
01233 88 | Magrathea Telecommunications Limited | 24/09/2004 |
01233 89 | BT | 15/07/1994 |