This page contains information about which telephone companies the various 03453 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0345 300 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 301 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 302 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 303 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 304 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 305 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 306 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 307 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 308 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 309 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 310 | Allocated | Vodafone Ltd (Thus) | 06/2007 |
| 0345 311 | Allocated | Citrus Telecommunications Ltd | 11/2013 |
| 0345 312 | Protected | - | - |
| 0345 313 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 314 | Protected | - | - |
| 0345 315 | Allocated | IV Response Limited | 05/2007 |
| 0345 316 | Protected | - | - |
| 0345 317 | Protected | - | - |
| 0345 318 | Protected | - | - |
| 0345 319 | Allocated | Planet Numbers Ltd | 03/2013 |
| 0345 320 | Protected | - | - |
| 0345 321 | Allocated | KCOM Group PLC | 05/2007 |
| 0345 322 | Allocated | Affiniti Integrated Solutions Ltd | 02/2009 |
| 0345 323 | Allocated | Affiniti Integrated Solutions Ltd | 02/2009 |
| 0345 324 | Protected | - | - |
| 0345 325 | Protected | - | - |
| 0345 326 | Protected | - | - |
| 0345 327 | Protected | - | - |
| 0345 328 | Protected | - | - |
| 0345 329 | Protected | - | - |
| 0345 330 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 331 | Allocated | IV Response Limited | 05/2007 |
| 0345 332 | Protected | - | - |
| 0345 333 | Allocated | British Sky Broadcasting Limited | 05/2007 |
| 0345 334 | Allocated | British Sky Broadcasting Limited | 05/2007 |
| 0345 335 | Protected | - | - |
| 0345 336 | Protected | - | - |
| 0345 337 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 338 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 339 | Protected | - | - |
| 0345 340 | Allocated | Invosys Limited | 02/2014 |
| 0345 341 | Allocated | Ace Call Limited | 08/2010 |
| 0345 342 | Protected | - | - |
| 0345 343 | Protected | - | - |
| 0345 344 | Protected | - | - |
| 0345 345 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 346 | Allocated | Calltracks Limited | 12/2007 |
| 0345 347 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 348 | Protected | - | - |
| 0345 349 | Protected | - | - |
| 0345 350 | Allocated | COLT Technology Services | 04/2007 |
| 0345 351 | Allocated | COLT Technology Services | 04/2007 |
| 0345 352 | Allocated | COLT Technology Services | 04/2007 |
| 0345 353 | Allocated | COLT Technology Services | 04/2007 |
| 0345 354 | Allocated | LegendTel LLC | 05/2009 |
| 0345 355 | Allocated | COLT Technology Services | 04/2007 |
| 0345 356 | Allocated | COLT Technology Services | 04/2007 |
| 0345 357 | Allocated | COLT Technology Services | 04/2007 |
| 0345 358 | Allocated | COLT Technology Services | 04/2007 |
| 0345 359 | Allocated | COLT Technology Services | 04/2007 |
| 0345 360 | Allocated | COLT Technology Services | 04/2007 |
| 0345 361 | Protected | - | - |
| 0345 362 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 363 | Allocated | Callagenix Ltd | 03/2010 |
| 0345 364 | Protected | - | - |
| 0345 365 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 366 | Allocated | Vodafone Ltd (C&W) | 03/2010 |
| 0345 367 | Allocated | Invomo Ltd | 10/2007 |
| 0345 368 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 369 | Protected | - | - |
| 0345 370 | Allocated | Windsor Telecom Plc | 09/2007 |
| 0345 371 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 372 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 373 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 374 | Allocated | Barritel Limited | 04/2007 |
| 0345 375 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 376 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 377 | Allocated | Level 3 Communications UK Limited | 04/2007 |
| 0345 378 | Allocated | Vodafone Ltd (Energis) | 04/2007 |
| 0345 379 | Protected | - | - |
| 0345 380 | Protected | - | - |
| 0345 381 | Protected | - | - |
| 0345 382 | Protected | - | - |
| 0345 383 | Protected | - | - |
| 0345 384 | Protected | - | - |
| 0345 385 | Protected | - | - |
| 0345 386 | Protected | - | - |
| 0345 387 | Allocated | Nodemax Limited | 07/2008 |
| 0345 388 | Allocated | Barritec Limited | 04/2007 |
| 0345 389 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 390 | Allocated | Vodafone Ltd (C&W) | 04/2012 |
| 0345 391 | Protected | - | - |
| 0345 392 | Protected | - | - |
| 0345 393 | Protected | - | - |
| 0345 394 | Protected | - | - |
| 0345 395 | Allocated | Telecoms World Direct Ltd | 07/2014 |
| 0345 396 | Protected | - | - |
| 0345 397 | Protected | - | - |
| 0345 398 | Protected | - | - |
| 0345 399 | Allocated | Eircom UK Ltd | 11/2007 |