01275 00 | Virgin Media Limited | 15/06/2000 |
01275 14 | Virgin Media Limited | 17/03/2016 |
01275 20 | TelNG Limited | 26/02/2007 |
01275 217 | TalkTalk Communications Limited | 18/01/2012 |
01275 218 | TalkTalk Communications Limited | 18/01/2012 |
01275 219 | TalkTalk Communications Limited | 18/01/2012 |
01275 22 | Redcentric Solutions Limited | 05/06/2015 |
01275 230 | (AQ) LIMITED | 19/10/2011 |
01275 231 | Square Systems Limited | 26/10/2007 |
01275 232 | Vodafone Ltd (Energis) | 02/07/2008 |
01275 234 | Digital Space Group Limited | 29/11/2007 |
01275 235 | TalkTalk Communications Limited | 13/02/2013 |
01275 236 | Telecom2 Limited | 10/09/2009 |
01275 237 | Mars Communications Limited | 04/02/2009 |
01275 238 | Telecoms World PLC | 12/03/2009 |
01275 239 | Invade International Ltd | 12/01/2016 |
01275 240 | Commi Holdings Limited | 21/11/2016 |
01275 241 | Nexus Telecommunications Limited | 25/09/2009 |
01275 242 | Barritel Limited | 08/10/2008 |
01275 243 | Vectone Mobile Limited | 29/06/2009 |
01275 244 | Voiceflex Limited | 24/09/2007 |
01275 246 | Nodemax Limited | 08/07/2008 |
01275 247 | IPV6 Limited | 29/01/2009 |
01275 248 | TeleWare Group PLC | 20/08/2009 |
01275 249 | Suretec Systems Ltd | 04/05/2010 |
01275 25 | Localphone Limited | 24/04/2007 |
01275 260 | CFL Communications Ltd | 08/07/2009 |
01275 261 | Buzz Networks Limited | 01/03/2010 |
01275 262 | Solutios Limited | 03/09/2008 |
01275 263 | Digitech Solutions Global Limited | 23/04/2010 |
01275 264 | Calltracks Limited | 19/09/2013 |
01275 265 | Sky UK Limited | 28/06/2013 |
01275 266 | VoIP-Un Limited | 26/10/2007 |
01275 267 | Core Telecom Limited | 05/08/2010 |
01275 268 | VoiceHost Limited | 27/08/2010 |
01275 269 | Sky UK Limited | 28/06/2013 |
01275 270 | GCI Network Solutions Ltd | 19/04/2017 |
01275 271 | Numbergroup Utilities Ltd | 02/11/2010 |
01275 274 | Telephone Box Limited | 24/11/2010 |
01275 275 | Net-Work Internet Ltd | 28/09/2007 |
01275 276 | Atomstream Limited | 25/02/2010 |
01275 277 | Inet Telecoms Ltd (Voipfone) | 27/02/2009 |
01275 278 | E164 Ltd | 15/04/2010 |
01275 280 | Andrews & Arnold (Numbers) Ltd | 27/02/2009 |
01275 281 | IP Wholesale Limited | 01/06/2017 |
01275 284 | Hello Telecom (UK) Limited | 14/04/2011 |
01275 285 | Windsor Telecom Ltd | 20/07/2010 |
01275 288 | Voxbone SA | 17/12/2007 |
01275 289 | Invoco Ltd | 20/09/2011 |
01275 291 | Internexus Networks Limited | 18/11/2011 |
01275 292 | M247 Ltd | 29/05/2015 |
01275 293 | Invosys Limited | 09/07/2012 |
01275 294 | Orbtalk Limited | 08/09/2011 |
01275 295 | Digital Space Group Limited | 15/03/2016 |
01275 296 | Nexbridge Communications Limited | 06/03/2012 |
01275 297 | Phone Co-Op Numbering Limited | 16/12/2010 |
01275 299 | Nationwide Telephone Assistance Ltd | 01/10/2007 |
01275 305 | Daisy Communications Ltd | 13/12/2011 |
01275 306 | Daisy Communications Ltd | 13/12/2011 |
01275 307 | Daisy Communications Ltd | 13/12/2011 |
01275 308 | Daisy Communications Ltd | 13/12/2011 |
01275 309 | Daisy Communications Ltd | 13/12/2011 |
01275 310 | Linear Telecoms Limited | 07/10/2010 |
01275 311 | Minotaur Telecom Limited | 07/02/2013 |
01275 312 | API Telecom Limited | 26/03/2012 |
01275 313 | ICC Networks Ltd | 12/04/2012 |
01275 314 | Simwood eSMS Limited | 01/02/2012 |
01275 316 | Sky UK Limited | 28/06/2013 |
01275 317 | IOVOX Limited | 02/07/2012 |
01275 318 | Bicom Systems EURL | 01/03/2012 |
01275 319 | Ziron Limited | 30/07/2012 |
01275 320 | Lumen Technologies UK Limited | 07/06/2006 |
01275 321 | Lumen Technologies UK Limited | 07/06/2006 |
01275 329 | Lumen Technologies UK Limited | 07/06/2006 |
01275 33 | BT | 15/07/1994 |
01275 34 | BT | 15/07/1994 |
01275 35 | GCI Network Solutions Ltd | 20/04/2017 |
01275 37 | BT | 15/07/1994 |
01275 38 | TTNC Limited | 25/11/2013 |
01275 39 | BT | 15/07/1994 |
01275 40 | Gamma Telecom Holdings Ltd | 22/12/2004 |
01275 41 | FleXtel Limited | 20/10/2005 |
01275 430 | Six Degrees Technology Group Limited | 14/01/2020 |
01275 434 | Six Degrees Technology Group Limited | 14/01/2020 |
01275 440 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 441 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 442 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 443 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 444 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 445 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 446 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 46 | BT | 15/07/1994 |
01275 47 | BT | 15/07/1994 |
01275 49 | Syntec Limited | 21/11/2005 |
01275 50 | Virgin Media Limited | 23/01/1998 |
01275 51 | BT | 15/07/1994 |
01275 520 | Adepteo Limited | 17/01/2017 |
01275 521 | I.T Communications Limited | 21/10/2016 |
01275 522 | Mintaka Limited | 11/07/2016 |
01275 523 | Entanet International Ltd | 12/12/2017 |
01275 524 | Club Communications Ltd | 03/07/2018 |
01275 525 | Colt Technology Services | 20/06/2016 |
01275 526 | Zapappi Ltd | 05/01/2018 |
01275 527 | Fuse 2 Communications Ltd | 04/07/2017 |
01275 528 | Sky UK Limited | 14/06/2019 |
01275 529 | IP Voice Networks Ltd | 20/09/2017 |
01275 53 | Served Up Limited | 09/05/2008 |
01275 54 | Virgin Media Limited | 17/03/2016 |
01275 55 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 560 | TalkTalk Communications Limited | 19/02/2013 |
01275 561 | Intrado Cloud Solutions Limited | 19/02/2013 |
01275 562 | Kalnet4U Ltd | 10/05/2013 |
01275 563 | Sky UK Limited | 03/12/2013 |
01275 564 | I-NET COMMUNICATIONS GROUP PLC | 20/06/2013 |
01275 565 | Content Guru Limited | 12/10/2012 |
01275 567 | iHub 2 Limited | 18/05/2016 |
01275 568 | Sky UK Limited | 19/03/2014 |
01275 569 | XoverX Ltd | 01/05/2013 |
01275 570 | Vodafone Ltd (Thus) | 17/01/2012 |
01275 571 | Vodafone Ltd (Thus) | 17/01/2012 |
01275 572 | Vodafone Ltd (Thus) | 17/01/2012 |
01275 573 | Vodafone Ltd (Thus) | 17/01/2012 |
01275 578 | Vodafone Ltd (Thus) | 17/01/2012 |
01275 579 | Vodafone Ltd (Thus) | 17/01/2012 |
01275 586 | GTT-EMEA LTD | 14/10/2021 |
01275 587 | GTT-EMEA LTD | 14/10/2021 |
01275 589 | GTT-EMEA LTD | 14/10/2021 |
01275 59 | AQL Wholesale Ltd | 21/06/2006 |
01275 600 | Redwood Technologies Ltd | 15/11/2018 |
01275 602 | Sky UK Limited | 02/09/2015 |
01275 603 | Sky UK Limited | 30/03/2016 |
01275 604 | IOVOX Limited | 28/03/2017 |
01275 605 | YayYay Limited | 23/04/2015 |
01275 606 | Affiniti Integrated Solutions Limited | 09/02/2015 |
01275 607 | Number Services Ltd. | 22/11/2018 |
01275 609 | Internet of Things Limited | 13/08/2018 |
01275 610 | 24 SEVEN CLOUD COMMUNICATIONS LTD | 17/01/2020 |
01275 611 | Media Hawk Ltd | 20/05/2021 |
01275 612 | TRUESPEED COMMUNICATIONS LTD | 21/05/2019 |
01275 615 | DIDWW Ireland Limited | 27/01/2020 |
01275 616 | VOXYONDER NETWORK SERVICES UK LTD | 10/09/2020 |
01275 620 | Dial 9 Communications Limited | 09/12/2019 |
01275 622 | SiPalto Ltd | 17/06/2020 |
01275 623 | Mi Telecom Limited | 03/07/2020 |
01275 624 | Lanonyx Telecom Limited | 10/08/2021 |
01275 625 | Colt Technology Services | 04/06/2020 |
01275 626 | ICUK Computing Services Limited | 17/06/2020 |
01275 627 | BT | 23/04/2020 |
01275 628 | Belgacom International Carrier Services SA | 14/10/2019 |
01275 70 | Citrus Telecommunications Ltd | 11/04/2006 |
01275 730 | Resilient PLC | 18/05/2012 |
01275 731 | Resilient PLC | 18/05/2012 |
01275 739 | Resilient PLC | 18/05/2012 |
01275 740 | Inclarity Communications Limited | 16/02/2011 |
01275 741 | Inclarity Communications Limited | 16/02/2011 |
01275 742 | Inclarity Communications Limited | 16/02/2011 |
01275 745 | Inclarity Communications Limited | 16/02/2011 |
01275 75 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 76 | Vodafone Ltd (C&W) | 04/10/2013 |
01275 77 | Magrathea Telecommunications Limited | 24/09/2004 |
01275 787 | Spitfire Network Services Limited | 09/11/2011 |
01275 79 | Virgin Media Limited | 17/03/2016 |
01275 80 | Affiniti Integrated Solutions Limited | 04/11/1998 |
01275 81 | BT | 15/07/1994 |
01275 82 | Affiniti Integrated Solutions Limited | 12/12/2002 |
01275 83 | BT | 15/07/1994 |
01275 84 | BT | 15/07/1994 |
01275 85 | BT | 15/07/1994 |
01275 86 | BT | 29/09/1997 |
01275 87 | BT | 15/07/1994 |
01275 88 | Virgin Media Limited | 17/03/2016 |
01275 89 | BT | 15/07/1994 |