This page contains information about which telephone companies the various 03333 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0333 300 | Allocated | COLT Technology Services | 03/2007 |
| 0333 301 | Allocated | Numbers Plus Ltd | 07/2011 |
| 0333 302 | Allocated | Wightfibre Limited | 11/2009 |
| 0333 303 | Allocated | PTGI International Carrier Services Ltd | 06/2007 |
| 0333 304 | Allocated | Vodafone Uk Ltd | 12/2007 |
| 0333 305 | Allocated | Magrathea Telecommunications Limited | 03/2014 |
| 0333 306 | Free | - | - |
| 0333 307 | Free | - | - |
| 0333 308 | Free | - | - |
| 0333 309 | Free | - | - |
| 0333 310 | Allocated | Plus Telecom Limited | 03/2007 |
| 0333 311 | Allocated | Orbtalk Limited | 06/2011 |
| 0333 312 | Free | - | - |
| 0333 313 | Allocated | Oxygen8 Communications UK Limited | 05/2008 |
| 0333 314 | Free | - | - |
| 0333 315 | Free | - | - |
| 0333 316 | Free | - | - |
| 0333 317 | Free | - | - |
| 0333 318 | Free | - | - |
| 0333 319 | Free | - | - |
| 0333 320 | Allocated | Daisy Communications Ltd | 06/2007 |
| 0333 321 | Allocated | TalkTalk Communications Limited | 05/2007 |
| 0333 322 | Allocated | Budget Numbers Ltd | 06/2010 |
| 0333 323 | Allocated | Invosys Limited | 03/2010 |
| 0333 324 | Free | - | - |
| 0333 325 | Allocated | Syntec Limited | 11/2013 |
| 0333 326 | Free | - | - |
| 0333 327 | Free | - | - |
| 0333 328 | Free | - | - |
| 0333 329 | Allocated | Core Communication Services Ltd | 11/2013 |
| 0333 330 | Allocated | Sky Premium Telecom Limited | 06/2011 |
| 0333 331 | Allocated | Affiniti Integrated Solutions Ltd | 08/2013 |
| 0333 332 | Allocated | Storacall Technology Ltd (Trading As X-ON) | 11/2009 |
| 0333 333 | Allocated | Sesui Limited | 03/2007 |
| 0333 334 | Allocated | Solutios Limited | 10/2008 |
| 0333 335 | Allocated | Liquid 11 Limited | 11/2012 |
| 0333 336 | Allocated | Mintaka Limited | 12/2013 |
| 0333 337 | Free | - | - |
| 0333 338 | Allocated | Hutchison 3G UK Ltd | 09/2007 |
| 0333 339 | Free | - | - |
| 0333 340 | Allocated | Andrews & Arnold Ltd | 04/2007 |
| 0333 341 | Free | - | - |
| 0333 342 | Free | - | - |
| 0333 343 | Allocated | Virgin Media Limited | 02/2014 |
| 0333 344 | Allocated | Telephony Services Limited | 03/2007 |
| 0333 345 | Allocated | Verizon UK Ltd | 03/2007 |
| 0333 346 | Free | - | - |
| 0333 347 | Free | - | - |
| 0333 348 | Free | - | - |
| 0333 349 | Free | - | - |
| 0333 350 | Allocated | Danemere Street Creative | 07/2009 |
| 0333 351 | Free | - | - |
| 0333 352 | Free | - | - |
| 0333 353 | Free | - | - |
| 0333 354 | Free | - | - |
| 0333 355 | Allocated | Core Telecom Limited | 06/2007 |
| 0333 356 | Free | - | - |
| 0333 357 | Free | - | - |
| 0333 358 | Allocated | VoiceHost Limited | 01/2011 |
| 0333 359 | Free | - | - |
| 0333 360 | Allocated | IP Base Ltd | 07/2011 |
| 0333 361 | Free | - | - |
| 0333 362 | Free | - | - |
| 0333 363 | Free | - | - |
| 0333 364 | Free | - | - |
| 0333 365 | Free | - | - |
| 0333 366 | Allocated | Nationwide Telephone Assistance Ltd | 12/2007 |
| 0333 367 | Free | - | - |
| 0333 368 | Free | - | - |
| 0333 369 | Free | - | - |
| 0333 370 | Allocated | Planet Numbers Ltd | 05/2009 |
| 0333 371 | Free | - | - |
| 0333 372 | Free | - | - |
| 0333 373 | Free | - | - |
| 0333 374 | Free | - | - |
| 0333 375 | Free | - | - |
| 0333 376 | Free | - | - |
| 0333 377 | Protected | - | - |
| 0333 378 | Allocated | Known Communications Limited | 08/2009 |
| 0333 379 | Allocated | Resilient Networks Plc | 05/2014 |
| 0333 380 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 381 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 382 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 383 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 384 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 385 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 386 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 387 | Free | - | - |
| 0333 388 | Allocated | Cablecom Networking Ltd | 07/2008 |
| 0333 389 | Free | - | - |
| 0333 390 | Allocated | Vox Sciences Limited | 07/2012 |
| 0333 391 | Allocated | Vox Sciences Limited | 07/2012 |
| 0333 392 | Free | - | - |
| 0333 393 | Free | - | - |
| 0333 394 | Free | - | - |
| 0333 395 | Free | - | - |
| 0333 396 | Free | - | - |
| 0333 397 | Free | - | - |
| 0333 398 | Free | - | - |
| 0333 399 | Allocated | Resilient Networks Plc | 06/2007 |