0344 Numbers
0344 numbers are special use landline numbers that are not tied to any geographic location. This means that when you receive a call from a 0344 number, you have no way of knowing where it’s coming from. These numbers are used for government bodies, charities, public sector, and not-for-profit organizations and are in use across the UK. While the numbers aren’t tied to any geographic location, they don’t cost any more to call than standard, geographic-based landline numbers, like 01 or 02 numbers.
Since 0344 numbers don’t cost any more to call than a normal home or business landline, that means they are often included in call packages if you’re calling from a landline, or in included ‘talktime’ or bundled minutes when calling from a mobile.
0344 numbers were introduced as an alternative to chargeable 084 and 087 numbers. 0300 numbers let companies have a single point of contact for customers or interested parties without having to charge people extra to call them.
Calling costs for 0344 numbers
While a 0344 number is not categorized as a freephone number, calling them will not result in any added charges. Any 0344 number you call should be charged at your standard network rate. This applies to all 0344 numbers you call, no matter what the digits are afterwards.
Prefixes and Providers
| Code | Provider | Assigned |
|---|
| Loading data… |
| 0344 040 2 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 040 4 | BT | 03/06/2010 |
| 0344 040 5 | BT | 03/06/2010 |
| 0344 041 2 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 041 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 041 9 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 042 4 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 043 3 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 044 0 | TalkTalk Communications Limited | 29/04/2014 |
| 0344 044 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 044 7 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 046 6 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 047 7 | Colt Technology Services | 25/04/2007 |
| 0344 048 8 | Vodafone Ltd (C&W) | 13/08/2015 |
| 0344 050 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 050 1 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 050 2 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 050 9 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 055 1 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 055 7 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 056 4 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 056 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 056 7 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 057 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 058 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 058 5 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 058 7 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 090 0 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 090 2 | BT | 03/06/2010 |
| 0344 090 3 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 090 8 | BT | 03/06/2010 |
| 0344 090 9 | BT | 03/06/2010 |
| 0344 091 0 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 092 3 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 093 0 | Colt Technology Services | 25/04/2007 |
| 0344 093 1 | Colt Technology Services | 25/04/2007 |
| 0344 093 2 | Colt Technology Services | 25/04/2007 |
| 0344 093 3 | Colt Technology Services | 25/04/2007 |
| 0344 093 4 | Colt Technology Services | 25/04/2007 |
| 0344 093 5 | Colt Technology Services | 25/04/2007 |
| 0344 093 6 | Colt Technology Services | 25/04/2007 |
| 0344 093 7 | Colt Technology Services | 25/04/2007 |
| 0344 093 8 | Colt Technology Services | 25/04/2007 |
| 0344 093 9 | Colt Technology Services | 25/04/2007 |
| 0344 094 2 | Daisy Communications Ltd | 30/04/2014 |
| 0344 094 3 | Daisy Communications Ltd | 30/04/2014 |
| 0344 094 4 | Daisy Communications Ltd | 30/04/2014 |
| 0344 094 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 095 5 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 096 5 | Daisy Communications Ltd | 30/04/2014 |
| 0344 097 0 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 097 8 | Solutios Limited | 06/10/2008 |
| 0344 098 8 | Vodafone Ltd (C&W) | 13/08/2015 |
| 0344 099 6 | Vodafone Ltd (Thus) | 15/10/2014 |
| 0344 099 9 | Vodafone Ltd (Thus) | 13/08/2015 |
| 0344 201 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 206 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 209 | Vodafone Ltd (Energis) | 11/12/2007 |
| 0344 210 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 211 | Calltracks Limited | 14/05/2014 |
| 0344 212 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 216 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 222 | Calltracks Limited | 14/05/2014 |
| 0344 225 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 227 | Nextec UK Limited | 12/05/2016 |
| 0344 230 | Calltracks Limited | 14/05/2014 |
| 0344 234 | Calltracks Limited | 14/05/2014 |
| 0344 238 | Nextec UK Limited | 12/05/2016 |
| 0344 241 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 243 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 244 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 245 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 247 | Windsor Telecom Ltd | 03/12/2012 |
| 0344 248 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 249 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 251 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 252 | Nextec UK Limited | 12/05/2016 |
| 0344 257 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 259 | Daisy Communications Ltd | 30/04/2014 |
| 0344 262 | Nextec UK Limited | 12/05/2016 |
| 0344 263 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 264 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 268 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 272 | Core Telecom Limited | 19/02/2014 |
| 0344 273 | Core Telecom Limited | 19/02/2014 |
| 0344 274 | Call Stream Limited | 30/06/2014 |
| 0344 275 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 276 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 277 | Nextec UK Limited | 02/03/2016 |
| 0344 279 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 281 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 282 | Call Stream Limited | 30/06/2014 |
| 0344 286 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 288 | Core Telecom Limited | 19/02/2014 |
| 0344 289 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 292 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 293 | Daisy Communications Ltd | 30/04/2014 |
| 0344 295 | Barritel Limited | 06/12/2010 |
| 0344 296 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 298 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 299 | Call Stream Limited | 30/06/2014 |
| 0344 301 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 305 | Barritel Limited | 06/12/2010 |
| 0344 306 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 307 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 308 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 309 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 310 | Core Telecom Limited | 19/02/2014 |
| 0344 314 | Call Stream Limited | 30/06/2014 |
| 0344 315 | Citrus Telecommunications Ltd | 03/04/2018 |
| 0344 318 | Telecoms World PLC | 14/10/2008 |
| 0344 321 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 322 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 324 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 325 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 326 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 327 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 328 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 329 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 330 | Barritel Limited | 06/12/2010 |
| 0344 332 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 333 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 334 | Affiniti Integrated Solutions Limited | 09/08/2007 |
| 0344 335 | BT | 01/07/2008 |
| 0344 338 | Colt Technology Services | 16/04/2014 |
| 0344 346 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 351 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 353 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 357 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 369 | Orange Business Holdings UK Limited | 11/06/2014 |
| 0344 370 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 371 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 372 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 375 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 376 | AQL Wholesale Ltd | 06/11/2015 |
| 0344 381 | BT | 03/06/2010 |
| 0344 382 | Resilient PLC | 14/11/2007 |
| 0344 384 | Voiceflex Limited | 27/01/2015 |
| 0344 387 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 390 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0344 391 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 395 | Virgin Media Limited | 28/03/2012 |
| 0344 396 | Syntec Limited | 19/06/2007 |
| 0344 402 | Call Stream Limited | 30/06/2014 |
| 0344 406 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 409 | TelXL Ltd | 03/04/2014 |
| 0344 410 | Numbergroup Utilities Ltd | 18/09/2018 |
| 0344 411 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0344 412 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 413 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 414 | Nexus Telecommunications Limited | 12/07/2007 |
| 0344 415 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 417 | Affiniti Integrated Solutions Limited | 30/07/2013 |
| 0344 420 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 423 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 431 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 432 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 443 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 444 | Colt Technology Services | 25/04/2007 |
| 0344 445 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 448 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 453 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 460 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 463 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 468 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 472 | Virgin Media Limited | 08/04/2016 |
| 0344 477 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 478 | Digital Mail Limited | 11/05/2016 |
| 0344 479 | Call Stream Limited | 30/06/2014 |
| 0344 481 | Virgin Media Limited | 28/03/2012 |
| 0344 482 | Syntec Limited | 19/06/2007 |
| 0344 484 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 488 | Affiniti Integrated Solutions Limited | 05/02/2009 |
| 0344 493 | Virgin Media Limited | 08/04/2016 |
| 0344 494 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 495 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 496 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 499 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 500 | FleXtel Limited | 10/04/2007 |
| 0344 501 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 502 | TTNC Limited | 01/10/2013 |
| 0344 504 | Core Telecom Limited | 25/11/2011 |
| 0344 507 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 509 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 511 | Syntec Limited | 19/06/2007 |
| 0344 512 | TTNC Limited | 20/04/2015 |
| 0344 515 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 517 | Virgin Media Limited | 08/04/2016 |
| 0344 520 | Virgin Media Limited | 28/03/2012 |
| 0344 522 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 526 | Virgin Media Limited | 08/04/2016 |
| 0344 527 | Syntec Limited | 19/06/2007 |
| 0344 528 | Virgin Media Limited | 08/04/2016 |
| 0344 530 | Syntec Limited | 19/06/2007 |
| 0344 531 | Virgin Media Limited | 08/04/2016 |
| 0344 535 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 537 | Virgin Media Limited | 08/04/2016 |
| 0344 538 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 539 | Calltracks Limited | 14/05/2014 |
| 0344 542 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 543 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 544 | TelXL Ltd | 03/04/2014 |
| 0344 545 | Swiftnet Ltd | 04/09/2007 |
| 0344 546 | Lumen Technologies UK Limited | 10/04/2007 |
| 0344 549 | Vodafone Ltd (C&W) | 08/05/2014 |
| 0344 551 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 552 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 553 | Redcentric Solutions Limited | 26/05/2016 |
| 0344 556 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 557 | Call Stream Limited | 30/06/2014 |
| 0344 558 | Calltracks Limited | 14/05/2014 |
| 0344 560 | Sesui Limited | 15/09/2014 |
| 0344 561 | BT | 01/07/2008 |
| 0344 563 | Pulsant (Scotland) Limited | 28/07/2015 |
| 0344 567 | Telecoms World PLC | 05/10/2007 |
| 0344 568 | Nextec UK Limited | 02/03/2016 |
| 0344 570 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 571 | Virgin Media Limited | 08/04/2016 |
| 0344 573 | Call Stream Limited | 30/06/2014 |
| 0344 576 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 577 | Call Stream Limited | 30/06/2014 |
| 0344 579 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0344 580 | Colt Technology Services | 19/08/2015 |
| 0344 581 | Colt Technology Services | 25/04/2007 |
| 0344 583 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 585 | FleXtel Limited | 10/04/2007 |
| 0344 586 | FleXtel Limited | 10/04/2007 |
| 0344 587 | FleXtel Limited | 10/04/2007 |
| 0344 588 | FleXtel Limited | 10/04/2007 |
| 0344 589 | FleXtel Limited | 10/04/2007 |
| 0344 594 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 598 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 600 | Virgin Media Limited | 08/04/2016 |
| 0344 603 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 606 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 609 | TTNC Limited | 01/10/2013 |
| 0344 611 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 612 | Virgin Media Limited | 08/04/2016 |
| 0344 616 | TTNC Limited | 01/10/2013 |
| 0344 619 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 620 | Virgin Media Limited | 08/04/2016 |
| 0344 622 | TTNC Limited | 01/10/2013 |
| 0344 623 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 625 | TTNC Limited | 20/04/2015 |
| 0344 626 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 630 | Virgin Media Limited | 08/04/2016 |
| 0344 633 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 635 | Dynamic Mobile Billing Limited | 18/03/2016 |
| 0344 636 | TTNC Limited | 01/10/2013 |
| 0344 641 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 644 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 645 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0344 646 | BT | 03/06/2010 |
| 0344 647 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 649 | Calltracks Limited | 14/05/2014 |
| 0344 655 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 656 | TTNC Limited | 20/04/2015 |
| 0344 659 | Calltracks Limited | 14/05/2014 |
| 0344 660 | FleXtel Limited | 10/04/2007 |
| 0344 663 | Admiral Telecom Limited | 09/11/2007 |
| 0344 664 | FleXtel Limited | 10/04/2007 |
| 0344 665 | FleXtel Limited | 10/04/2007 |
| 0344 668 | TTNC Limited | 01/10/2013 |
| 0344 678 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 680 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 682 | Core Telecom Limited | 19/02/2014 |
| 0344 686 | Core Telecom Limited | 19/02/2014 |
| 0344 688 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 690 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 692 | Gamma Telecom Holdings Ltd | 20/06/2012 |
| 0344 693 | BT | 03/06/2010 |
| 0344 700 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 701 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 704 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 705 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 706 | TelXL Ltd | 03/04/2014 |
| 0344 711 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 712 | Virgin Media Limited | 08/04/2016 |
| 0344 713 | Syntec Limited | 19/06/2007 |
| 0344 718 | Virgin Media Limited | 08/04/2016 |
| 0344 720 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 725 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 728 | BT | 01/07/2008 |
| 0344 735 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 736 | BT | 01/07/2008 |
| 0344 739 | Core Telecom Limited | 19/02/2014 |
| 0344 740 | Barritel Limited | 10/12/2015 |
| 0344 742 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 743 | Virgin Media Limited | 28/03/2012 |
| 0344 745 | Commi Holdings Limited | 17/11/2016 |
| 0344 748 | BT | 01/07/2008 |
| 0344 750 | Virgin Media Limited | 28/03/2012 |
| 0344 755 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 757 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 766 | Barritec Limited | 18/12/2015 |
| 0344 767 | Syntec Limited | 19/06/2007 |
| 0344 768 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 770 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 772 | FleXtel Limited | 10/04/2007 |
| 0344 774 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 776 | Windsor Telecom Ltd | 13/06/2011 |
| 0344 777 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 778 | Resilient PLC | 14/11/2007 |
| 0344 779 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0344 781 | Virgin Media Limited | 08/04/2016 |
| 0344 782 | Syntec Limited | 19/06/2007 |
| 0344 785 | Virgin Media Limited | 08/04/2016 |
| 0344 788 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 793 | Virgin Media Limited | 08/04/2016 |
| 0344 798 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 800 | BT | 01/07/2008 |
| 0344 801 | Daisy Communications Ltd | 30/04/2014 |
| 0344 802 | FleXtel Limited | 10/04/2007 |
| 0344 804 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 807 | Daisy Communications Ltd | 30/04/2014 |
| 0344 808 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 809 | BT | 01/07/2008 |
| 0344 810 | TeleSurf Limited | 23/07/2015 |
| 0344 811 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 812 | FleXtel Limited | 10/04/2007 |
| 0344 815 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 818 | TTNC Limited | 01/10/2013 |
| 0344 820 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0344 822 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 823 | Magrathea Telecommunications Limited | 27/04/2015 |
| 0344 824 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 826 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 829 | Daisy Communications Ltd | 30/04/2014 |
| 0344 832 | TelXL Ltd | 03/04/2014 |
| 0344 833 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 835 | New Call Telecom Ltd | 01/10/2015 |
| 0344 836 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 838 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 840 | Windsor Telecom Ltd | 04/09/2007 |
| 0344 842 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 844 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 846 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 847 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 848 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 849 | Daisy Communications Ltd | 30/04/2014 |
| 0344 850 | Windsor Telecom Ltd | 30/03/2011 |
| 0344 854 | Vodafone Ltd (Energis) | 11/12/2007 |
| 0344 855 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 856 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 858 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0344 859 | Daisy Communications Ltd | 30/04/2014 |
| 0344 860 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 863 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 866 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 870 | Vodafone Ltd (C&W) | 09/05/2014 |
| 0344 871 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 873 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 874 | Vodafone Ltd (Energis) | 12/02/2010 |
| 0344 875 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 879 | BT | 01/07/2008 |
| 0344 880 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 881 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 884 | Six Degrees Technology Group Limited | 08/04/2020 |
| 0344 887 | Digital Space Group Limited | 01/06/2018 |
| 0344 888 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 890 | Vodafone Ltd (Thus) | 27/01/2012 |
| 0344 891 | Vodafone Ltd (C&W) | 16/09/2013 |
| 0344 892 | BT | 01/07/2008 |
| 0344 893 | Vodafone Ltd (Energis) | 26/04/2007 |
| 0344 894 | Virgin Media Limited | 28/03/2012 |
| 0344 897 | GCI Network Solutions Ltd | 20/04/2017 |
| 0344 900 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0344 902 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 904 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 905 | Digital Mail Limited | 11/05/2016 |
| 0344 907 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 910 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 912 | Syntec Limited | 19/06/2007 |
| 0344 916 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 922 | Call Stream Limited | 30/06/2014 |
| 0344 927 | 24 Seven Communications Ltd | 26/02/2013 |
| 0344 928 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 931 | Virgin Media Limited | 08/04/2016 |
| 0344 933 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 936 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 939 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 940 | TTNC Limited | 20/04/2015 |
| 0344 941 | Virgin Media Limited | 08/04/2016 |
| 0344 943 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 944 | 4D INTERACTIVE LTD | 04/06/2007 |
| 0344 947 | Calltracks Limited | 14/05/2014 |
| 0344 955 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 957 | Barritel Limited | 06/12/2010 |
| 0344 963 | Nexus Telecommunications Limited | 11/12/2013 |
| 0344 965 | Vodafone Ltd (Thus) | 07/02/2012 |
| 0344 967 | Gamma Telecom Holdings Ltd | 11/11/2008 |
| 0344 970 | Digital Mail Limited | 11/05/2016 |
| 0344 975 | Citrus Telecommunications Ltd | 28/10/2016 |
| 0344 976 | TalkTalk Communications Limited | 28/04/2014 |
| 0344 977 | Call Stream Limited | 30/06/2014 |
| 0344 979 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 980 | TalkTalk Communications Limited | 14/07/2008 |
| 0344 983 | Digital Mail Limited | 11/05/2016 |
| 0344 984 | Affiniti Integrated Solutions Limited | 14/05/2007 |
| 0344 986 | Magrathea Telecommunications Limited | 19/05/2015 |
| 0344 987 | GCI Network Solutions Ltd | 03/05/2017 |
| 0344 989 | TelXL Ltd | 03/04/2014 |
| 0344 991 | Invade International Ltd | 13/01/2016 |
| 0344 993 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0344 994 | Verizon UK Limited | 24/04/2007 |
| 0344 997 | Telecoms World Direct Ltd | 20/11/2008 |
| 0344 998 | I-NET COMMUNICATIONS GROUP PLC | 03/06/2014 |
| 0344 999 | 4D INTERACTIVE LTD | 04/06/2007 |