This page contains information about which telephone companies the various 03454 numbers are allocated to.
| First Digits | Status | Communications Provider | Notes | Change |
|---|---|---|---|---|
| 0345 400 | Allocated | Nexus Telecommunications Limited | - | 07/2007 |
| 0345 401 | Allocated | COLT Technology Services | - | 04/2007 |
| 0345 402 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 403 | Allocated | 4D Interactive Ltd | - | 06/2007 |
| 0345 404 | Allocated | Affiniti Integrated Solutions Ltd | - | 05/2007 |
| 0345 405 | Allocated | Verizon UK Ltd | - | 04/2007 |
| 0345 406 | Protected | - | - | - |
| 0345 407 | Protected | - | - | - |
| 0345 408 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 409 | Allocated | Nexus Telecommunications Limited | - | 07/2007 |
| 0345 410 | Allocated | Level 3 Communications UK Limited | - | 04/2007 |
| 0345 411 | Protected | - | - | - |
| 0345 412 | Protected | - | - | - |
| 0345 413 | Allocated | Node4 Ltd. | - | 05/2014 |
| 0345 414 | Allocated | Hospedia Limited | - | 09/2009 |
| 0345 415 | Allocated | Affiniti Integrated Solutions Ltd | - | 05/2007 |
| 0345 416 | Protected | - | - | - |
| 0345 417 | Protected | - | - | - |
| 0345 418 | Protected | - | - | - |
| 0345 419 | Protected | - | - | - |
| 0345 420 | Protected | - | - | - |
| 0345 421 | Allocated | Affiniti Integrated Solutions Ltd | - | 05/2007 |
| 0345 422 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 423 | Protected | - | - | - |
| 0345 424 | Allocated | BT | - | 04/2007 |
| 0345 425 | Allocated | Resilient Networks Plc | - | 06/2007 |
| 0345 426 | Protected | - | - | - |
| 0345 427 | Protected | - | - | - |
| 0345 428 | Protected | - | - | - |
| 0345 429 | Protected | - | - | - |
| 0345 430 | Allocated | Vodafone Ltd (C&W) | - | 04/2012 |
| 0345 431 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 432 | Protected | - | - | - |
| 0345 433 | Protected | - | - | - |
| 0345 434 | Allocated | TelXL Ltd | - | 01/2014 |
| 0345 435 | Protected | - | - | - |
| 0345 436 | Protected | - | - | - |
| 0345 437 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 438 | Protected | - | - | - |
| 0345 439 | Protected | - | - | - |
| 0345 440 | Protected | - | - | - |
| 0345 441 | Protected | - | - | - |
| 0345 442 | Protected | - | - | - |
| 0345 443 | Protected | - | - | - |
| 0345 444 | Protected | - | - | - |
| 0345 445 | Protected | - | - | - |
| 0345 446 | Protected | - | - | - |
| 0345 447 | Protected | - | - | - |
| 0345 448 | Protected | - | - | - |
| 0345 449 | Protected | - | - | - |
| 0345 450 | Allocated | Gamma Telecom Holdings Ltd | - | 02/2008 |
| 0345 451 | Allocated | TalkTalk Communications Limited | - | 04/2014 |
| 0345 452 | Allocated | Invomo Ltd | - | 01/2008 |
| 0345 453 | Protected | - | - | - |
| 0345 454 | Allocated | Virgin Media Limited | - | 07/2008 |
| 0345 455 | Allocated | Virgin Media Limited | - | 07/2008 |
| 0345 456 | Allocated | TalkTalk Communications Limited | - | 12/2008 |
| 0345 457 | Allocated | Served Up Limited. | - | 10/2008 |
| 0345 458 | Allocated | TalkTalk Communications Limited | - | 11/2007 |
| 0345 459 | Allocated | Telecoms World Plc | F-Digit '5' | 10/2008 |
| 0345 460 | Allocated | Windsor Telecom Plc | - | 09/2007 |
| 0345 461 | Protected | - | - | - |
| 0345 462 | Protected | - | - | - |
| 0345 463 | Allocated | Barritel Limited | - | 04/2007 |
| 0345 464 | Allocated | Vodafone Ltd (C&W) | - | 04/2007 |
| 0345 465 | Protected | - | - | - |
| 0345 466 | Allocated | Gamma Telecom Holdings Ltd | - | 07/2013 |
| 0345 467 | Allocated | Barritel Limited | - | 04/2007 |
| 0345 468 | Allocated | TTNC Limited | - | 04/2007 |
| 0345 469 | Protected | - | - | - |
| 0345 470 | Allocated | Windsor Telecom Plc | - | 09/2007 |
| 0345 471 | Protected | - | - | - |
| 0345 472 | Protected | - | - | - |
| 0345 473 | Protected | - | - | - |
| 0345 474 | Allocated | Barritel Limited | - | 04/2007 |
| 0345 475 | Allocated | Barritel Limited | - | 04/2007 |
| 0345 476 | Protected | - | - | - |
| 0345 477 | Allocated | Square Systems Limited | - | 11/2008 |
| 0345 478 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 479 | Protected | - | - | - |
| 0345 480 | Protected | - | - | - |
| 0345 481 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 482 | Allocated | Affiniti Integrated Solutions Ltd | - | 05/2007 |
| 0345 483 | Allocated | Supreme Connect Limited | - | 12/2011 |
| 0345 484 | Allocated | Barritel Limited | - | 04/2007 |
| 0345 485 | Allocated | Affiniti Integrated Solutions Ltd | - | 05/2007 |
| 0345 486 | Protected | - | - | - |
| 0345 487 | Allocated | Vodafone Ltd (Thus) | - | 06/2007 |
| 0345 488 | Protected | - | - | - |
| 0345 489 | Protected | - | - | - |
| 0345 490 | Protected | - | - | - |
| 0345 491 | Allocated | TalkTalk Communications Limited | - | 07/2008 |
| 0345 492 | Protected | - | - | - |
| 0345 493 | Protected | - | - | - |
| 0345 494 | Allocated | Buzz Networks Limited | - | 08/2008 |
| 0345 495 | Protected | - | - | - |
| 0345 496 | Allocated | Barritel Limited | - | 04/2007 |
| 0345 497 | Allocated | BT | - | 04/2007 |
| 0345 498 | Allocated | BT | - | 04/2007 |
| 0345 499 | Allocated | Tuxtel Ltd | - | 02/2012 |