0844 Numbers
- History of 084 and 087 area codes
- Cost to call 0844 numbers
- All Prefixes and Providers
- Other 4-digit Prefixes
0844 numbers are service numbers that are charged at special rates. Called the ‘inbound number’, the 0844 number is an incoming call-only number that is used by many companies throughout the United Kingdom. An incoming call-only number means that they can’t usually be used to make outbound calls.
There can be several reasons someone would want to have a 0844 number. For one, a 0844 number can disguise a caller’s geographic location. This can be beneficial for companies that function nationally, since there is no specially assigned area code for the company. This makes it more likely that customers won’t be turned off by a long distance area code calling them.
Another benefit of 0844 numbers is that, once it’s assigned to you, you can route it to any number in the world. So if you change your location, your number can go with you. This is ideal for expanding businesses.
History of 084 and 087 area codes
Originally introduced in 1996, 0844 numbers were for services that cost the same as standard local rate phone calls. In 2001, the 0344 and 0644 prefixes were annulled and their numbers were also transferred to the 0844 code.
In the mid-2000s, the cost of 0844 numbers changed and they began to be charged at a range of rates. Following this in 2015, all 084 and 087 numbers were switched to a new two-part charging structure that uses both the service charge and the access charge. Companies are restricted from using a 0844 number for post-sales customer service lines.
Cost to call 0844 numbers
Calling 0844 numbers are charged an access charge that is paid to your phone company and a service charge that is set by the company or organization you are calling. The service charge is usually between 0p to 7p per minutes and the access charge ranges from 8p to 65 p per minute.
Any 084 numbers are charged in the same way and have the same technical features. Any numbers that start with 0844, regardless of the following digits, cost the same. After the changes in the mid-2000s that saw 0844 numbers skyrocket, there have been recent changes that have drastically reduced the cost of calling these numbers. British Telecom (BT) has aided this by making sure that costs related to 0844 numbers are usually free (usually up to a certain amount per month). If customers aren’t on a BT call plan, most landline providers still average the costs of calling these numbers between 3p and 5p per minute.
Calling a 0844 number from a landline can cost more than 10p per minute; however, some providers include it alongside numbers starting with 01 and 02 minutes in inclusive call packages. Choose a provider from the table below for more information on their pricing.
| Caller’s Provider | Access charge (per minute) | Service charge (per minute) |
|---|---|---|
| Asda Mobile | 8p | Between 0p and 7p |
| BT | Between 0p and 31.41p, depending on call plan | |
| EE | Between 11p and 67p, depending on call plan | |
| Giffgaff | 25p | |
| Kcom | 15p | |
| Lycamobile | 23p | |
| O2 | 65p | |
| Plusnet | 9.58p | |
| Post Office | 14p | |
| Sky | 15p | |
| Talk Mobile | 15p | |
| TalkTalk | 12.5p from landline 25p from mobile | |
| Tesco Mobile | 25p | |
| Three | 65p | |
| Virgin Media | From 17p to 58p, depending on call plan | |
| Vodafone | 45p for pay-as-you-go customers 65p for pay monthly customers | |
| Zen Internet | 11p |
Prefixes and Providers
| Code | Provider | Assigned |
|---|
| Loading data… |
| 0844 003 2 | Virgin Media Limited | 08/04/2016 |
| 0844 006 6 | Square 1 Communications Limited | 02/09/2014 |
| 0844 040 0 | TalkTalk Communications Limited | 08/10/2003 |
| 0844 040 2 | Vodafone Ltd (Energis) | 30/05/2006 |
| 0844 040 4 | BT | 22/02/2000 |
| 0844 040 5 | BT | 22/02/2000 |
| 0844 040 6 | MANX TELECOM TRADING LIMITED | 08/02/2017 |
| 0844 041 2 | Vodafone Ltd (Thus) | 15/02/2012 |
| 0844 041 6 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 041 9 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 043 3 | TalkTalk Communications Limited | 29/06/2006 |
| 0844 044 6 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 044 7 | TalkTalk Communications Limited | 14/10/2013 |
| 0844 046 6 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 048 8 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 050 0 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 050 1 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 050 2 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 051 3 | Abel & Co (Scotland) Ltd | 27/07/2004 |
| 0844 051 5 | Abel & Co (Scotland) Ltd | 27/07/2004 |
| 0844 054 4 | Virgin Media Limited | 15/03/2004 |
| 0844 055 1 | Vodafone Ltd (Energis) | 26/11/2007 |
| 0844 055 7 | Vodafone Ltd (Energis) | 26/11/2007 |
| 0844 056 4 | Vodafone Ltd (Energis) | 26/11/2007 |
| 0844 056 6 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 056 7 | Vodafone Ltd (Energis) | 26/11/2007 |
| 0844 057 0 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 058 0 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 058 5 | Vodafone Ltd (Energis) | 26/11/2007 |
| 0844 058 7 | Vodafone Ltd (Energis) | 26/11/2007 |
| 0844 059 0 | Virgin Media Limited | 08/04/2016 |
| 0844 090 2 | BT | 12/08/2003 |
| 0844 090 3 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 090 6 | MANX TELECOM TRADING LIMITED | 08/02/2017 |
| 0844 090 8 | BT | 22/02/2000 |
| 0844 090 9 | BT | 22/02/2000 |
| 0844 091 0 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 092 3 | Vodafone Ltd (Energis) | 30/05/2006 |
| 0844 094 6 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 095 5 | TalkTalk Communications Limited | 29/06/2006 |
| 0844 096 1 | Telecom2 Limited | 29/07/2009 |
| 0844 096 7 | Virgin Media Limited | 08/04/2016 |
| 0844 097 0 | Vodafone Ltd (Thus) | 27/02/2012 |
| 0844 097 2 | Telecom2 Limited | 29/07/2009 |
| 0844 098 5 | Telecom2 Limited | 29/07/2009 |
| 0844 098 8 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 099 6 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 099 9 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 200 | Connect Telecom UK Limited | 09/11/2005 |
| 0844 201 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 202 | TAP GATEWAY LTD | 02/07/2020 |
| 0844 204 | Syntec Limited | 31/01/2007 |
| 0844 206 | Citrus Telecommunications Ltd | 07/03/2007 |
| 0844 207 | Relax Telecom Limited | 09/02/2009 |
| 0844 208 | Citrus Telecommunications Ltd | 19/09/2019 |
| 0844 209 | Vodafone Ltd (Energis) | 27/07/2007 |
| 0844 210 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 211 | Calltracks Limited | 22/07/2013 |
| 0844 212 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 214 | IV Response Limited | 26/02/2007 |
| 0844 215 | QX Telecom Ltd | 21/06/2007 |
| 0844 216 | Gamma Telecom Holdings Ltd | 22/06/2007 |
| 0844 217 | Localphone Limited | 22/06/2007 |
| 0844 218 | Atlantic Communications Corp Ltd | 18/11/2013 |
| 0844 220 | Telecom2 Limited | 29/07/2009 |
| 0844 221 | CFL Communications Ltd | 28/03/2006 |
| 0844 222 | Calltracks Limited | 22/07/2013 |
| 0844 223 | Jtec UK Limited | 27/07/2011 |
| 0844 225 | Gamma Telecom Holdings Ltd | 27/04/2006 |
| 0844 227 | Nextec UK Limited | 26/11/2013 |
| 0844 228 | Verizon UK Limited | 15/08/2006 |
| 0844 230 | Calltracks Limited | 22/07/2013 |
| 0844 232 | Jtec UK Limited | 27/07/2011 |
| 0844 234 | Calltracks Limited | 22/07/2013 |
| 0844 235 | Invoco Ltd | 30/07/2010 |
| 0844 238 | Nextec UK Limited | 26/11/2013 |
| 0844 239 | Verizon UK Limited | 15/08/2006 |
| 0844 241 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 243 | Affiniti Integrated Solutions Limited | 13/07/2007 |
| 0844 244 | Affiniti Integrated Solutions Limited | 15/05/2007 |
| 0844 245 | Affiniti Integrated Solutions Limited | 15/05/2007 |
| 0844 247 | Windsor Telecom Ltd | 13/06/2011 |
| 0844 248 | TalkTalk Communications Limited | 22/06/2007 |
| 0844 249 | TalkTalk Communications Limited | 22/06/2007 |
| 0844 251 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 252 | Nextec UK Limited | 26/11/2013 |
| 0844 254 | Verizon UK Limited | 15/08/2006 |
| 0844 255 | Invoco Ltd | 30/07/2010 |
| 0844 256 | Jtec UK Limited | 27/07/2011 |
| 0844 257 | Gamma Telecom Holdings Ltd | 06/10/2006 |
| 0844 258 | Media Telecom Ltd | 23/06/2010 |
| 0844 259 | Daisy Communications Ltd | 17/12/2010 |
| 0844 262 | Nextec UK Limited | 26/11/2013 |
| 0844 263 | Redcentric Solutions Limited | 25/05/2016 |
| 0844 264 | Gamma Telecom Holdings Ltd | 06/10/2006 |
| 0844 265 | Spacetel UK Ltd | 29/01/2007 |
| 0844 268 | Citrus Telecommunications Ltd | 07/03/2007 |
| 0844 269 | Syntec Limited | 19/03/2009 |
| 0844 271 | Syntec Limited | 31/01/2007 |
| 0844 272 | Core Telecom Limited | 11/12/2006 |
| 0844 273 | Core Telecom Limited | 14/03/2011 |
| 0844 274 | Call Stream Limited | 20/02/2007 |
| 0844 275 | 24 Seven Communications Ltd | 17/03/2008 |
| 0844 276 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 277 | Nextec UK Limited | 26/11/2013 |
| 0844 278 | Media Telecom Ltd | 23/06/2010 |
| 0844 279 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 281 | Redcentric Solutions Limited | 25/05/2016 |
| 0844 282 | Call Stream Limited | 20/02/2007 |
| 0844 284 | Jtec UK Limited | 27/07/2011 |
| 0844 285 | QX Telecom Ltd | 20/03/2007 |
| 0844 286 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 287 | Node4 Ltd | 03/05/2007 |
| 0844 288 | Core Telecom Limited | 11/12/2006 |
| 0844 289 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 290 | Spacetel UK Ltd | 29/01/2007 |
| 0844 292 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 293 | Daisy Communications Ltd | 17/12/2010 |
| 0844 294 | Relax Telecom Limited | 09/02/2009 |
| 0844 295 | Barritel Limited | 19/05/2008 |
| 0844 296 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 298 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 299 | Call Stream Limited | 20/02/2007 |
| 0844 300 | Connect Telecom UK Limited | 30/01/2007 |
| 0844 301 | Citrus Telecommunications Ltd | 07/03/2007 |
| 0844 302 | IV Response Limited | 28/08/2007 |
| 0844 303 | IV Response Limited | 26/02/2007 |
| 0844 304 | Node4 Ltd | 03/05/2007 |
| 0844 305 | Barritel Limited | 19/05/2008 |
| 0844 306 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 307 | Magrathea Telecommunications Limited | 10/05/2007 |
| 0844 308 | Magrathea Telecommunications Limited | 10/05/2007 |
| 0844 309 | Magrathea Telecommunications Limited | 10/05/2007 |
| 0844 310 | Core Telecom Limited | 11/12/2006 |
| 0844 312 | Spacetel UK Ltd | 29/01/2007 |
| 0844 313 | Alphatalk Limited | 30/01/2014 |
| 0844 314 | Call Stream Limited | 20/02/2007 |
| 0844 315 | Citrus Telecommunications Ltd | 07/03/2007 |
| 0844 316 | ICC Networks Ltd | 29/01/2009 |
| 0844 318 | Telecoms World PLC | 03/08/2012 |
| 0844 319 | Node4 Ltd | 03/05/2007 |
| 0844 320 | Connect Telecom UK Limited | 30/01/2007 |
| 0844 321 | Citrus Telecommunications Ltd | 07/03/2007 |
| 0844 322 | Affiniti Integrated Solutions Limited | 15/05/2007 |
| 0844 323 | IV Response Limited | 26/02/2007 |
| 0844 324 | Gamma Telecom Holdings Ltd | 22/06/2007 |
| 0844 325 | Gamma Telecom Holdings Ltd | 22/06/2007 |
| 0844 326 | Gamma Telecom Holdings Ltd | 22/06/2007 |
| 0844 327 | Gamma Telecom Holdings Ltd | 22/06/2007 |
| 0844 328 | 24 Seven Communications Ltd | 12/09/2011 |
| 0844 329 | Dynamic Mobile Billing Limited | 15/08/2007 |
| 0844 330 | Barritel Limited | 02/07/2007 |
| 0844 331 | 4D INTERACTIVE LTD | 24/07/2007 |
| 0844 332 | Affiniti Integrated Solutions Limited | 13/07/2007 |
| 0844 333 | Affiniti Integrated Solutions Limited | 13/07/2007 |
| 0844 334 | Affiniti Integrated Solutions Limited | 13/07/2007 |
| 0844 335 | BT | 16/08/2007 |
| 0844 337 | ETC Telecom Limited | 30/08/2007 |
| 0844 338 | Colt Technology Services | 27/07/2007 |
| 0844 339 | ETC Telecom Limited | 30/08/2007 |
| 0844 340 | ETC Telecom Limited | 03/09/2007 |
| 0844 341 | ETC Telecom Limited | 03/09/2007 |
| 0844 342 | ETC Telecom Limited | 03/09/2007 |
| 0844 344 | Alphatalk Limited | 05/09/2007 |
| 0844 346 | TalkTalk Communications Limited | 19/09/2007 |
| 0844 347 | (AQ) LIMITED | 28/09/2012 |
| 0844 348 | (AQ) LIMITED | 28/09/2012 |
| 0844 349 | (AQ) LIMITED | 28/09/2012 |
| 0844 351 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 353 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 354 | (AQ) LIMITED | 28/09/2012 |
| 0844 356 | (AQ) LIMITED | 28/09/2012 |
| 0844 357 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 358 | (AQ) LIMITED | 28/09/2012 |
| 0844 359 | (AQ) LIMITED | 28/09/2012 |
| 0844 360 | Net-Work Internet Ltd | 24/09/2007 |
| 0844 361 | (AQ) LIMITED | 28/09/2012 |
| 0844 362 | (AQ) LIMITED | 28/09/2012 |
| 0844 363 | (AQ) LIMITED | 28/09/2012 |
| 0844 364 | (AQ) LIMITED | 28/09/2012 |
| 0844 365 | (AQ) LIMITED | 28/09/2012 |
| 0844 366 | Net-Work Internet Ltd | 24/09/2007 |
| 0844 367 | (AQ) LIMITED | 28/09/2012 |
| 0844 369 | Orange Business Holdings UK Limited | 26/02/2013 |
| 0844 370 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 371 | TalkTalk Communications Limited | 30/10/2007 |
| 0844 372 | TalkTalk Communications Limited | 30/10/2007 |
| 0844 373 | Assume Nothing Limited | 07/11/2007 |
| 0844 374 | Gamma Telecom Holdings Ltd | 23/03/2021 |
| 0844 375 | TalkTalk Communications Limited | 30/10/2007 |
| 0844 376 | AQL Wholesale Ltd | 15/07/2009 |
| 0844 377 | Assume Nothing Limited | 07/11/2007 |
| 0844 378 | Buzz Networks Limited | 14/07/2009 |
| 0844 379 | Invade International Ltd | 13/01/2016 |
| 0844 380 | Connect Telecom UK Limited | 16/10/2007 |
| 0844 381 | BT | 10/08/2009 |
| 0844 382 | Resilient PLC | 26/10/2007 |
| 0844 383 | Assume Nothing Limited | 07/11/2007 |
| 0844 384 | Voiceflex Limited | 08/10/2007 |
| 0844 385 | Sound Advertising Ltd | 30/10/2007 |
| 0844 386 | Square Systems Limited | 25/10/2007 |
| 0844 387 | TalkTalk Communications Limited | 16/10/2007 |
| 0844 388 | Assume Nothing Limited | 07/11/2007 |
| 0844 389 | Assume Nothing Limited | 07/11/2007 |
| 0844 390 | Vodafone Ltd (Thus) | 10/05/2010 |
| 0844 391 | Vodafone Ltd (Energis) | 26/05/2006 |
| 0844 394 | Invade International Ltd | 13/01/2016 |
| 0844 395 | Virgin Media Limited | 12/11/2004 |
| 0844 396 | Syntec Limited | 21/12/2004 |
| 0844 397 | iHub 2 Limited | 17/06/2016 |
| 0844 398 | ETC Telecom Limited | 31/08/2007 |
| 0844 402 | Call Stream Limited | 20/02/2007 |
| 0844 404 | Telecom 10 Ltd | 25/11/2009 |
| 0844 405 | Newtel Limited | 16/04/2003 |
| 0844 406 | TalkTalk Communications Limited | 09/10/2003 |
| 0844 409 | TelXL Ltd | 11/06/2003 |
| 0844 410 | Numbergroup Utilities Ltd | 19/10/2010 |
| 0844 411 | Affiniti Integrated Solutions Limited | 16/01/2008 |
| 0844 412 | Vodafone Ltd (Energis) | 26/05/2006 |
| 0844 413 | Redcentric Solutions Limited | 25/05/2016 |
| 0844 414 | Nexus Telecommunications Limited | 07/12/2001 |
| 0844 415 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 417 | Affiniti Integrated Solutions Limited | 26/04/2011 |
| 0844 418 | Telecom 10 Ltd | 25/11/2009 |
| 0844 419 | Icron Network Limited | 08/08/2006 |
| 0844 420 | Redcentric Solutions Limited | 25/05/2016 |
| 0844 423 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 424 | Premier Voicemail Ltd | 05/12/2001 |
| 0844 427 | Cloud9 Communications Limited | 23/04/2010 |
| 0844 428 | Connect Telecom UK Limited | 07/08/2002 |
| 0844 429 | Telecom2 Limited | 29/07/2009 |
| 0844 430 | IV Response Limited | 09/03/2002 |
| 0844 431 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 432 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 439 | Connect Telecom UK Limited | 12/02/2003 |
| 0844 440 | Global Electroteks Ltd | 16/02/2001 |
| 0844 441 | Telecom2 Limited | 29/07/2009 |
| 0844 442 | Newtel Limited | 16/04/2003 |
| 0844 443 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 444 | Colt Technology Services | 20/10/2009 |
| 0844 445 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 446 | 4D INTERACTIVE LTD | 04/11/2011 |
| 0844 448 | Dynamic Mobile Billing Limited | 05/07/2001 |
| 0844 450 | Invade International Ltd | 13/01/2016 |
| 0844 453 | TalkTalk Communications Limited | 10/03/2006 |
| 0844 454 | Premier Voicemail Ltd | 05/12/2001 |
| 0844 456 | Alphatalk Limited | 30/01/2014 |
| 0844 460 | Redcentric Solutions Limited | 25/05/2016 |
| 0844 462 | Connect Telecom UK Limited | 07/08/2002 |
| 0844 463 | TalkTalk Communications Limited | 09/10/2003 |
| 0844 469 | Newtel Limited | 16/04/2003 |
| 0844 471 | Sala Trading Ltd | 16/09/2004 |
| 0844 472 | Virgin Media Limited | 08/04/2016 |
| 0844 473 | Via-Vox Limited | 27/04/2009 |
| 0844 474 | Yim Siam Telecom | 07/01/2004 |
| 0844 475 | Lycatel (Ireland) Limited | 01/03/2006 |
| 0844 476 | Daotec Ltd | 27/04/2005 |
| 0844 477 | TalkTalk Communications Limited | 09/10/2003 |
| 0844 478 | Digital Mail Limited | 14/08/2003 |
| 0844 479 | Call Stream Limited | 11/02/2011 |
| 0844 480 | Vocalis Telecom | 03/11/2001 |
| 0844 481 | Virgin Media Limited | 12/11/2004 |
| 0844 482 | Syntec Limited | 04/12/2003 |
| 0844 484 | Magrathea Telecommunications Limited | 17/01/2002 |
| 0844 485 | Inclarity Communications Limited | 23/01/2014 |
| 0844 487 | Red Squared Ltd | 24/01/2006 |
| 0844 488 | Affiniti Integrated Solutions Limited | 16/01/2008 |
| 0844 490 | TeleWare Group PLC | 26/11/2008 |
| 0844 491 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 492 | Media Telecom Ltd | 23/06/2010 |
| 0844 493 | Virgin Media Limited | 08/04/2016 |
| 0844 494 | TalkTalk Communications Limited | 07/11/2013 |
| 0844 495 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 496 | 24 Seven Communications Ltd | 17/03/2008 |
| 0844 497 | Core Communication Services Limited | 12/04/2007 |
| 0844 498 | 4D INTERACTIVE LTD | 24/07/2007 |
| 0844 499 | TalkTalk Communications Limited | 28/06/2005 |
| 0844 500 | FleXtel Limited | 16/06/2000 |
| 0844 501 | Citrus Telecommunications Ltd | 11/07/2014 |
| 0844 502 | TTNC Limited | 02/10/2013 |
| 0844 503 | 24 Seven Communications Ltd | 16/10/2015 |
| 0844 504 | Core Telecom Limited | 01/03/2006 |
| 0844 507 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0844 508 | Call Telecom Ltd | 13/07/2005 |
| 0844 509 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0844 510 | ETC Telecom Limited | 03/09/2007 |
| 0844 511 | Syntec Limited | 21/12/2004 |
| 0844 512 | TTNC Limited | 02/10/2013 |
| 0844 513 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 514 | TelNG Limited | 28/01/2008 |
| 0844 515 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 517 | Virgin Media Limited | 08/04/2016 |
| 0844 519 | Call Telecom Ltd | 13/07/2005 |
| 0844 520 | Virgin Media Limited | 12/11/2004 |
| 0844 521 | Call Telecom Ltd | 13/07/2005 |
| 0844 522 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 525 | Nationwide Telephone Assistance Ltd | 14/02/2011 |
| 0844 526 | Virgin Media Limited | 08/04/2016 |
| 0844 527 | Syntec Limited | 21/12/2004 |
| 0844 528 | Virgin Media Limited | 08/04/2016 |
| 0844 530 | Syntec Limited | 21/12/2004 |
| 0844 531 | Virgin Media Limited | 08/04/2016 |
| 0844 532 | Call Telecom Ltd | 13/07/2005 |
| 0844 533 | TelNG Limited | 28/01/2008 |
| 0844 535 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 536 | ETC Telecom Limited | 03/09/2007 |
| 0844 537 | Virgin Media Limited | 08/04/2016 |
| 0844 538 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 539 | Calltracks Limited | 22/07/2013 |
| 0844 540 | Sky UK Limited | 11/12/2013 |
| 0844 542 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0844 543 | Affiniti Integrated Solutions Limited | 15/09/2005 |
| 0844 544 | TelXL Ltd | 26/05/2006 |
| 0844 545 | Swiftnet Ltd | 10/10/2001 |
| 0844 546 | Lumen Technologies UK Limited | 08/03/2006 |
| 0844 549 | Vodafone Ltd (C&W) | 06/05/2014 |
| 0844 550 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 551 | Citrus Telecommunications Ltd | 09/07/2003 |
| 0844 552 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 553 | Redcentric Solutions Limited | 25/05/2016 |
| 0844 554 | Virtual Talk Ltd | 23/04/2014 |
| 0844 555 | IV Response Limited | 09/03/2002 |
| 0844 556 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 557 | Call Stream Limited | 13/10/2005 |
| 0844 558 | Calltracks Limited | 22/07/2013 |
| 0844 559 | Jtec UK Limited | 27/07/2011 |
| 0844 560 | Sesui Limited | 26/10/2004 |
| 0844 561 | BT | 25/08/2005 |
| 0844 562 | Simwood eSMS Limited | 19/07/2006 |
| 0844 563 | Pulsant (Scotland) Limited | 20/02/2009 |
| 0844 565 | InTouch Communication Services Limited | 06/07/2004 |
| 0844 566 | Connect Telecom UK Limited | 27/07/2001 |
| 0844 567 | Telecoms World PLC | 20/03/2002 |
| 0844 568 | Nextec UK Limited | 26/11/2013 |
| 0844 570 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 571 | Virgin Media Limited | 08/04/2016 |
| 0844 572 | A2B Telecom Limited | 19/10/2011 |
| 0844 573 | Call Stream Limited | 20/02/2007 |
| 0844 574 | QX Telecom Ltd | 20/03/2007 |
| 0844 575 | Sala Trading Ltd | 09/07/2002 |
| 0844 576 | TalkTalk Communications Limited | 26/03/2007 |
| 0844 577 | Call Stream Limited | 30/08/2012 |
| 0844 578 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 579 | Vodafone Ltd (Energis) | 13/04/2007 |
| 0844 580 | Colt Technology Services | 19/08/2015 |
| 0844 581 | Colt Technology Services | 24/12/2002 |
| 0844 582 | Telecom 10 Ltd | 25/11/2009 |
| 0844 583 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 584 | Cloud9 Communications Limited | 23/04/2010 |
| 0844 585 | FleXtel Limited | 28/09/2004 |
| 0844 586 | FleXtel Limited | 28/09/2004 |
| 0844 587 | FleXtel Limited | 19/09/2006 |
| 0844 588 | FleXtel Limited | 28/09/2004 |
| 0844 589 | FleXtel Limited | 28/09/2004 |
| 0844 590 | Core Communication Services Limited | 12/04/2007 |
| 0844 591 | Inclarity Communications Limited | 23/01/2014 |
| 0844 593 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 594 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 595 | Nationwide Telephone Assistance Ltd | 14/02/2011 |
| 0844 597 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 598 | Citrus Telecommunications Ltd | 11/07/2014 |
| 0844 599 | Alphatalk Limited | 30/01/2014 |
| 0844 600 | Virgin Media Limited | 08/04/2016 |
| 0844 601 | Call Telecom Ltd | 13/07/2005 |
| 0844 603 | Dynamic Mobile Billing Limited | 01/08/2005 |
| 0844 605 | IV Response Limited | 16/09/2005 |
| 0844 606 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 609 | TTNC Limited | 02/10/2013 |
| 0844 610 | Call Telecom Ltd | 13/07/2005 |
| 0844 611 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 612 | Virgin Media Limited | 08/04/2016 |
| 0844 615 | Core Communication Services Limited | 20/07/2005 |
| 0844 616 | TTNC Limited | 02/10/2013 |
| 0844 617 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 619 | Dynamic Mobile Billing Limited | 01/08/2005 |
| 0844 620 | Virgin Media Limited | 08/04/2016 |
| 0844 622 | TTNC Limited | 02/10/2013 |
| 0844 623 | Dynamic Mobile Billing Limited | 01/08/2005 |
| 0844 625 | TTNC Limited | 02/10/2013 |
| 0844 626 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 627 | Call Telecom Ltd | 13/07/2005 |
| 0844 630 | Virgin Media Limited | 08/04/2016 |
| 0844 632 | Call Telecom Ltd | 13/07/2005 |
| 0844 633 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 635 | Dynamic Mobile Billing Limited | 01/08/2005 |
| 0844 636 | TTNC Limited | 02/10/2013 |
| 0844 639 | Core Communication Services Limited | 12/04/2007 |
| 0844 640 | IV Response Limited | 16/09/2005 |
| 0844 641 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 644 | Affiniti Integrated Solutions Limited | 01/11/2011 |
| 0844 645 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 646 | BT | 23/06/2005 |
| 0844 647 | Vodafone Ltd (Energis) | 26/05/2006 |
| 0844 649 | Calltracks Limited | 22/07/2013 |
| 0844 650 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 652 | Telecom2 Limited | 29/07/2009 |
| 0844 654 | CFL Communications Ltd | 09/04/2014 |
| 0844 655 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 656 | TTNC Limited | 02/10/2013 |
| 0844 657 | Syntec Limited | 31/01/2007 |
| 0844 658 | Jtec UK Limited | 27/07/2011 |
| 0844 659 | Calltracks Limited | 22/07/2013 |
| 0844 660 | FleXtel Limited | 16/01/2006 |
| 0844 663 | Admiral Telecom Limited | 31/07/2006 |
| 0844 664 | FleXtel Limited | 23/01/2006 |
| 0844 665 | FleXtel Limited | 23/01/2006 |
| 0844 666 | CFL Communications Ltd | 28/03/2006 |
| 0844 668 | TTNC Limited | 02/10/2013 |
| 0844 669 | Real Time Telecoms Ltd | 21/08/2014 |
| 0844 670 | Telecom 10 Ltd | 25/11/2009 |
| 0844 671 | IV Response Limited | 28/08/2007 |
| 0844 672 | Telecom 10 Ltd | 25/11/2009 |
| 0844 673 | IV Response Limited | 28/08/2007 |
| 0844 674 | Telecom 10 Ltd | 25/11/2009 |
| 0844 677 | Telecom 10 Ltd | 25/11/2009 |
| 0844 678 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 679 | ETC Telecom Limited | 31/08/2007 |
| 0844 680 | Affiniti Integrated Solutions Limited | 07/02/2007 |
| 0844 681 | Media Telecom Ltd | 23/06/2010 |
| 0844 682 | Core Telecom Limited | 14/03/2011 |
| 0844 683 | Tabsoft Limited | 30/04/2007 |
| 0844 685 | Rojo Trading Limited | 19/04/2007 |
| 0844 686 | Core Telecom Limited | 11/12/2006 |
| 0844 687 | QX Telecom Ltd | 20/03/2007 |
| 0844 688 | Magrathea Telecommunications Limited | 20/10/2006 |
| 0844 689 | Telecom 10 Ltd | 25/11/2009 |
| 0844 690 | 24 Seven Communications Ltd | 17/03/2008 |
| 0844 691 | Assume Nothing Limited | 07/11/2007 |
| 0844 692 | Gamma Telecom Holdings Ltd | 06/07/2009 |
| 0844 693 | BT | 10/08/2009 |
| 0844 694 | Assume Nothing Limited | 07/11/2007 |
| 0844 695 | Net-Work Internet Ltd | 24/09/2007 |
| 0844 696 | Sound Advertising Ltd | 04/01/2008 |
| 0844 697 | Assume Nothing Limited | 07/11/2007 |
| 0844 698 | Assume Nothing Limited | 07/11/2007 |
| 0844 699 | Assume Nothing Limited | 07/11/2007 |
| 0844 700 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 701 | TalkTalk Communications Limited | 20/07/2006 |
| 0844 703 | Newtel Limited | 16/04/2003 |
| 0844 704 | Magrathea Telecommunications Limited | 16/03/2002 |
| 0844 705 | TalkTalk Communications Limited | 09/10/2003 |
| 0844 706 | TelXL Ltd | 11/06/2003 |
| 0844 707 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 709 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 710 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 711 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 712 | Virgin Media Limited | 08/04/2016 |
| 0844 713 | Syntec Limited | 21/12/2004 |
| 0844 714 | Call Telecom Ltd | 13/07/2005 |
| 0844 717 | TelNG Limited | 28/01/2008 |
| 0844 718 | Virgin Media Limited | 08/04/2016 |
| 0844 720 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 722 | Inclarity Communications Limited | 23/01/2014 |
| 0844 723 | InTouch Communication Services Limited | 06/07/2004 |
| 0844 725 | Vodafone Ltd (Energis) | 26/05/2006 |
| 0844 727 | Alphatalk Limited | 30/01/2014 |
| 0844 728 | BT | 26/08/2004 |
| 0844 729 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 731 | InTouch Communication Services Limited | 06/07/2004 |
| 0844 733 | Inclarity Communications Limited | 23/01/2014 |
| 0844 734 | Alphatalk Limited | 30/01/2014 |
| 0844 735 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 736 | BT | 26/08/2004 |
| 0844 739 | Core Telecom Limited | 14/03/2011 |
| 0844 740 | Barritel Limited | 10/12/2015 |
| 0844 742 | Vodafone Ltd (Energis) | 26/05/2006 |
| 0844 743 | Virgin Media Limited | 12/11/2004 |
| 0844 745 | Commi Holdings Limited | 16/11/2016 |
| 0844 746 | ETC Telecom Limited | 31/08/2007 |
| 0844 748 | BT | 26/08/2004 |
| 0844 749 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 750 | Virgin Media Limited | 12/11/2004 |
| 0844 751 | ETC Telecom Limited | 03/09/2007 |
| 0844 752 | Invade International Ltd | 13/01/2016 |
| 0844 753 | Lycatel (Ireland) Limited | 01/03/2006 |
| 0844 754 | Sesui Limited | 17/02/2005 |
| 0844 755 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 756 | Digital Space Group Limited | 24/12/2015 |
| 0844 757 | 24 Seven Communications Ltd | 12/09/2011 |
| 0844 759 | Core Communication Services Limited | 12/04/2007 |
| 0844 761 | Invade International Ltd | 13/01/2016 |
| 0844 762 | Via-Vox Limited | 06/12/2011 |
| 0844 763 | Lycatel (Ireland) Limited | 01/03/2006 |
| 0844 764 | Digital Space Group Limited | 24/12/2015 |
| 0844 765 | Sesui Limited | 17/02/2005 |
| 0844 766 | Barritec Limited | 17/12/2015 |
| 0844 767 | Syntec Limited | 26/03/2008 |
| 0844 768 | 24 Seven Communications Ltd | 12/09/2011 |
| 0844 770 | TalkTalk Communications Limited | 29/06/2006 |
| 0844 771 | Microtalk Europe Limited | 10/03/2016 |
| 0844 772 | FleXtel Limited | 23/01/2006 |
| 0844 773 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 774 | Magrathea Telecommunications Limited | 25/11/2005 |
| 0844 775 | Hello Telecom (UK) Limited | 01/07/2009 |
| 0844 776 | Windsor Telecom Ltd | 13/06/2011 |
| 0844 777 | Citrus Telecommunications Ltd | 30/06/2006 |
| 0844 778 | Resilient PLC | 13/06/2006 |
| 0844 779 | Vodafone Ltd (Thus) | 10/05/2010 |
| 0844 780 | IV Response Limited | 30/08/2007 |
| 0844 781 | Virgin Media Limited | 08/04/2016 |
| 0844 782 | Syntec Limited | 21/12/2004 |
| 0844 783 | Call Telecom Ltd | 13/07/2005 |
| 0844 785 | Virgin Media Limited | 08/04/2016 |
| 0844 788 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 790 | Core Communication Services Limited | 12/04/2007 |
| 0844 792 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 793 | Virgin Media Limited | 08/04/2016 |
| 0844 795 | Plus Telecom Limited | 18/01/2006 |
| 0844 797 | TeleWare Group PLC | 26/11/2008 |
| 0844 798 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 799 | IV Response Limited | 16/09/2005 |
| 0844 800 | BT | 30/06/2000 |
| 0844 801 | Daisy Communications Ltd | 17/12/2010 |
| 0844 802 | FleXtel Limited | 23/01/2006 |
| 0844 803 | Fubra Limited | 07/02/2007 |
| 0844 804 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 805 | Fubra Limited | 07/02/2007 |
| 0844 806 | Fubra Limited | 07/02/2007 |
| 0844 807 | Daisy Communications Ltd | 17/12/2010 |
| 0844 808 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 809 | BT | 11/12/2006 |
| 0844 810 | TeleSurf Limited | 16/04/2010 |
| 0844 811 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 812 | FleXtel Limited | 23/01/2006 |
| 0844 813 | Fubra Limited | 07/02/2007 |
| 0844 814 | Fubra Limited | 07/02/2007 |
| 0844 815 | TalkTalk Communications Limited | 20/12/2006 |
| 0844 816 | Fubra Limited | 07/02/2007 |
| 0844 817 | Fubra Limited | 07/02/2007 |
| 0844 818 | TTNC Limited | 02/10/2013 |
| 0844 819 | Fubra Limited | 07/02/2007 |
| 0844 820 | 4D INTERACTIVE LTD | 16/12/2005 |
| 0844 822 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 823 | Magrathea Telecommunications Limited | 24/02/2011 |
| 0844 824 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 826 | TalkTalk Communications Limited | 23/02/2007 |
| 0844 827 | Telecom 10 Ltd | 25/11/2009 |
| 0844 829 | Daisy Communications Ltd | 17/12/2010 |
| 0844 831 | Swiftnet Ltd | 01/04/2003 |
| 0844 832 | TelXL Ltd | 11/06/2003 |
| 0844 833 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 835 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 836 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 837 | Digitech Solutions Global Limited | 07/05/2008 |
| 0844 838 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 839 | Icron Network Limited | 08/08/2006 |
| 0844 840 | Windsor Telecom Ltd | 24/01/2002 |
| 0844 842 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 843 | Telecom 10 Ltd | 25/11/2009 |
| 0844 844 | TalkTalk Communications Limited | 20/07/2006 |
| 0844 846 | Gamma Telecom Holdings Ltd | 20/07/2006 |
| 0844 847 | TalkTalk Communications Limited | 23/02/2007 |
| 0844 848 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 849 | Daisy Communications Ltd | 17/12/2010 |
| 0844 850 | Windsor Telecom Ltd | 30/03/2011 |
| 0844 851 | Telecom 10 Ltd | 25/11/2009 |
| 0844 853 | Relax Telecom Limited | 09/02/2009 |
| 0844 854 | Vodafone Ltd (Energis) | 27/07/2007 |
| 0844 855 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 856 | TalkTalk Communications Limited | 23/02/2007 |
| 0844 857 | Telecom 10 Ltd | 25/11/2009 |
| 0844 858 | Vodafone Ltd (Energis) | 27/07/2007 |
| 0844 859 | Daisy Communications Ltd | 17/12/2010 |
| 0844 860 | TalkTalk Communications Limited | 14/10/2013 |
| 0844 861 | Connect Telecom UK Limited | 07/03/2003 |
| 0844 862 | Swiftnet Ltd | 01/04/2003 |
| 0844 863 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 865 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 866 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 867 | Icron Network Limited | 08/08/2006 |
| 0844 869 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 870 | Vodafone Ltd (C&W) | 18/06/2013 |
| 0844 871 | Vodafone Ltd (Energis) | 22/12/2006 |
| 0844 872 | Telecom 10 Ltd | 25/11/2009 |
| 0844 873 | Vodafone Ltd (Energis) | 22/12/2006 |
| 0844 874 | Vodafone Ltd (Energis) | 27/07/2007 |
| 0844 875 | TalkTalk Communications Limited | 26/03/2007 |
| 0844 877 | Relax Telecom Limited | 09/02/2009 |
| 0844 879 | BT | 11/12/2006 |
| 0844 880 | Gamma Telecom Holdings Ltd | 16/12/2003 |
| 0844 881 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 883 | Core Communication Services Limited | 20/07/2005 |
| 0844 884 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0844 887 | Digital Space Group Limited | 24/12/2015 |
| 0844 888 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 889 | IV Response Limited | 16/09/2005 |
| 0844 890 | Vodafone Ltd (Thus) | 10/05/2010 |
| 0844 891 | Vodafone Ltd (C&W) | 13/09/2013 |
| 0844 892 | BT | 26/08/2004 |
| 0844 893 | Vodafone Ltd (Energis) | 26/05/2006 |
| 0844 894 | Virgin Media Limited | 12/11/2004 |
| 0844 897 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 898 | InTouch Communication Services Limited | 06/07/2004 |
| 0844 900 | 4D INTERACTIVE LTD | 12/06/2001 |
| 0844 901 | Swiftnet Ltd | 01/04/2003 |
| 0844 902 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 903 | Icron Network Limited | 08/08/2006 |
| 0844 904 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 905 | Digital Mail Limited | 28/08/2003 |
| 0844 906 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 907 | TalkTalk Communications Limited | 19/09/2007 |
| 0844 909 | IV Response Limited | 09/03/2002 |
| 0844 910 | Magrathea Telecommunications Limited | 27/07/2007 |
| 0844 911 | Invade International Ltd | 13/01/2016 |
| 0844 912 | Syntec Limited | 21/12/2004 |
| 0844 913 | Lycatel (Ireland) Limited | 01/03/2006 |
| 0844 914 | Sesui Limited | 17/02/2005 |
| 0844 915 | Digital Space Group Limited | 24/12/2015 |
| 0844 916 | 24 Seven Communications Ltd | 12/09/2011 |
| 0844 917 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 918 | Spacetel UK Ltd | 26/07/2005 |
| 0844 920 | Lycatel (Ireland) Limited | 01/03/2006 |
| 0844 921 | Digital Space Group Limited | 24/12/2015 |
| 0844 922 | Call Stream Limited | 13/10/2005 |
| 0844 923 | Atlas Interactive Group Limited | 28/10/2005 |
| 0844 927 | 24 Seven Communications Ltd | 12/09/2011 |
| 0844 928 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 929 | Sesui Limited | 17/02/2005 |
| 0844 930 | TeleWare Group PLC | 26/11/2008 |
| 0844 931 | Virgin Media Limited | 08/04/2016 |
| 0844 932 | 24 Seven Communications Ltd | 16/10/2015 |
| 0844 933 | Magrathea Telecommunications Limited | 25/11/2005 |
| 0844 934 | Plus Telecom Limited | 18/01/2006 |
| 0844 936 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 937 | Telecom2 Limited | 29/07/2009 |
| 0844 938 | CFL Communications Ltd | 28/03/2006 |
| 0844 939 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 940 | TTNC Limited | 02/10/2013 |
| 0844 941 | Virgin Media Limited | 08/04/2016 |
| 0844 942 | 24 Seven Communications Ltd | 16/10/2015 |
| 0844 943 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 944 | 4D INTERACTIVE LTD | 16/12/2005 |
| 0844 947 | Calltracks Limited | 22/07/2013 |
| 0844 948 | CFL Communications Ltd | 28/03/2006 |
| 0844 949 | Plus Telecom Limited | 18/01/2006 |
| 0844 950 | Plus Telecom Limited | 28/02/2006 |
| 0844 952 | Telecom 10 Ltd | 25/11/2009 |
| 0844 953 | ETC Telecom Limited | 31/08/2007 |
| 0844 954 | Telecom 10 Ltd | 25/11/2009 |
| 0844 955 | Vodafone Ltd (Thus) | 28/02/2012 |
| 0844 956 | ETC Telecom Limited | 31/08/2007 |
| 0844 957 | Barritel Limited | 19/05/2008 |
| 0844 958 | ETC Telecom Limited | 31/08/2007 |
| 0844 960 | Plus Telecom Limited | 28/02/2006 |
| 0844 963 | Nexus Telecommunications Limited | 09/05/2007 |
| 0844 964 | ETC Telecom Limited | 03/09/2007 |
| 0844 965 | Vodafone Ltd (Thus) | 27/04/2012 |
| 0844 967 | Gamma Telecom Holdings Ltd | 06/10/2006 |
| 0844 968 | IV Response Limited | 30/08/2007 |
| 0844 970 | Digital Mail Limited | 14/08/2003 |
| 0844 972 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 973 | InTouch Communication Services Limited | 06/07/2004 |
| 0844 974 | Inclarity Communications Limited | 23/01/2014 |
| 0844 975 | Citrus Telecommunications Ltd | 11/07/2014 |
| 0844 976 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 977 | Call Stream Limited | 11/02/2011 |
| 0844 978 | Alphatalk Limited | 30/01/2014 |
| 0844 979 | Magrathea Telecommunications Limited | 08/09/2003 |
| 0844 980 | TalkTalk Communications Limited | 09/10/2003 |
| 0844 981 | Icron Network Limited | 08/08/2006 |
| 0844 983 | Digital Mail Limited | 28/08/2003 |
| 0844 984 | Affiniti Integrated Solutions Limited | 15/03/2004 |
| 0844 985 | WAVECREST NETWORKS LIMITED | 17/12/2019 |
| 0844 986 | Magrathea Telecommunications Limited | 08/09/2003 |
| 0844 987 | GCI Network Solutions Ltd | 19/04/2017 |
| 0844 988 | Swiftnet Ltd | 01/04/2003 |
| 0844 989 | TelXL Ltd | 11/06/2003 |
| 0844 991 | Invade International Ltd | 13/01/2016 |
| 0844 992 | Spacetel UK Ltd | 26/07/2005 |
| 0844 993 | I-NET COMMUNICATIONS GROUP PLC | 02/04/2007 |
| 0844 994 | Verizon UK Limited | 22/01/2004 |
| 0844 995 | Invoco Ltd | 30/07/2010 |
| 0844 997 | Telecoms World Direct Ltd | 22/11/2006 |
| 0844 998 | I-NET COMMUNICATIONS GROUP PLC | 24/02/2010 |
| 0844 999 | 4D INTERACTIVE LTD | 27/02/2001 |