This page contains information about which telephone companies the various 02003 numbers are allocated to.
| First Digits | Status | Communications Provider | Number Length | Change |
|---|---|---|---|---|
| 020 0300 | Allocated | Sesui Limited | (0)+10 | 09/03/2005 |
| 020 0301 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0302 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0303 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0304 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0305 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0306 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0307 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0308 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0309 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0310 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0311 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0312 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0313 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0314 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0315 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0316 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0317 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0318 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0319 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0320 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0321 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0322 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0323 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0324 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0325 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0326 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0327 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0328 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0329 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0330 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0331 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0332 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0333 | Allocated | (aq) Limited trading as aql | (0)+10 | 29/08/2007 |
| 020 0334 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0335 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0336 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0337 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0338 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0339 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0340 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0341 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0342 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0343 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0344 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0345 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0346 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0347 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0348 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0349 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0350 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0351 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0352 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0353 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0354 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0355 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0356 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0357 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0358 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0359 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0360 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0361 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0362 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0363 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0364 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0365 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0366 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0367 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0368 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0369 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0370 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0371 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0372 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0373 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0374 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0375 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0376 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0377 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0378 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0379 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0380 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0381 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0382 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0383 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0384 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0385 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0386 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0387 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0388 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0389 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0390 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0391 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0392 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0393 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0394 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0395 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0396 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0397 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0398 | Free for National Dialling Only | - | (0)+10 | - |
| 020 0399 | Free for National Dialling Only | - | (0)+10 | - |