This page contains information about which telephone companies the various 02004 numbers are allocated to.
| First Digits | Status | Number Length |
|---|---|---|
| 020 0400 | Free for National Dialling Only | (0)+10 |
| 020 0401 | Free for National Dialling Only | (0)+10 |
| 020 0402 | Free for National Dialling Only | (0)+10 |
| 020 0403 | Free for National Dialling Only | (0)+10 |
| 020 0404 | Free for National Dialling Only | (0)+10 |
| 020 0405 | Free for National Dialling Only | (0)+10 |
| 020 0406 | Free for National Dialling Only | (0)+10 |
| 020 0407 | Free for National Dialling Only | (0)+10 |
| 020 0408 | Free for National Dialling Only | (0)+10 |
| 020 0409 | Free for National Dialling Only | (0)+10 |
| 020 0410 | Free for National Dialling Only | (0)+10 |
| 020 0411 | Free for National Dialling Only | (0)+10 |
| 020 0412 | Free for National Dialling Only | (0)+10 |
| 020 0413 | Free for National Dialling Only | (0)+10 |
| 020 0414 | Free for National Dialling Only | (0)+10 |
| 020 0415 | Free for National Dialling Only | (0)+10 |
| 020 0416 | Free for National Dialling Only | (0)+10 |
| 020 0417 | Free for National Dialling Only | (0)+10 |
| 020 0418 | Free for National Dialling Only | (0)+10 |
| 020 0419 | Free for National Dialling Only | (0)+10 |
| 020 0420 | Free for National Dialling Only | (0)+10 |
| 020 0421 | Free for National Dialling Only | (0)+10 |
| 020 0422 | Free for National Dialling Only | (0)+10 |
| 020 0423 | Free for National Dialling Only | (0)+10 |
| 020 0424 | Free for National Dialling Only | (0)+10 |
| 020 0425 | Free for National Dialling Only | (0)+10 |
| 020 0426 | Free for National Dialling Only | (0)+10 |
| 020 0427 | Free for National Dialling Only | (0)+10 |
| 020 0428 | Free for National Dialling Only | (0)+10 |
| 020 0429 | Free for National Dialling Only | (0)+10 |
| 020 0430 | Free for National Dialling Only | (0)+10 |
| 020 0431 | Free for National Dialling Only | (0)+10 |
| 020 0432 | Free for National Dialling Only | (0)+10 |
| 020 0433 | Free for National Dialling Only | (0)+10 |
| 020 0434 | Free for National Dialling Only | (0)+10 |
| 020 0435 | Free for National Dialling Only | (0)+10 |
| 020 0436 | Free for National Dialling Only | (0)+10 |
| 020 0437 | Free for National Dialling Only | (0)+10 |
| 020 0438 | Free for National Dialling Only | (0)+10 |
| 020 0439 | Free for National Dialling Only | (0)+10 |
| 020 0440 | Free for National Dialling Only | (0)+10 |
| 020 0441 | Free for National Dialling Only | (0)+10 |
| 020 0442 | Free for National Dialling Only | (0)+10 |
| 020 0443 | Free for National Dialling Only | (0)+10 |
| 020 0444 | Free for National Dialling Only | (0)+10 |
| 020 0445 | Free for National Dialling Only | (0)+10 |
| 020 0446 | Free for National Dialling Only | (0)+10 |
| 020 0447 | Free for National Dialling Only | (0)+10 |
| 020 0448 | Free for National Dialling Only | (0)+10 |
| 020 0449 | Free for National Dialling Only | (0)+10 |
| 020 0450 | Free for National Dialling Only | (0)+10 |
| 020 0451 | Free for National Dialling Only | (0)+10 |
| 020 0452 | Free for National Dialling Only | (0)+10 |
| 020 0453 | Free for National Dialling Only | (0)+10 |
| 020 0454 | Free for National Dialling Only | (0)+10 |
| 020 0455 | Free for National Dialling Only | (0)+10 |
| 020 0456 | Free for National Dialling Only | (0)+10 |
| 020 0457 | Free for National Dialling Only | (0)+10 |
| 020 0458 | Free for National Dialling Only | (0)+10 |
| 020 0459 | Free for National Dialling Only | (0)+10 |
| 020 0460 | Free for National Dialling Only | (0)+10 |
| 020 0461 | Free for National Dialling Only | (0)+10 |
| 020 0462 | Free for National Dialling Only | (0)+10 |
| 020 0463 | Free for National Dialling Only | (0)+10 |
| 020 0464 | Free for National Dialling Only | (0)+10 |
| 020 0465 | Free for National Dialling Only | (0)+10 |
| 020 0466 | Free for National Dialling Only | (0)+10 |
| 020 0467 | Free for National Dialling Only | (0)+10 |
| 020 0468 | Free for National Dialling Only | (0)+10 |
| 020 0469 | Free for National Dialling Only | (0)+10 |
| 020 0470 | Free for National Dialling Only | (0)+10 |
| 020 0471 | Free for National Dialling Only | (0)+10 |
| 020 0472 | Free for National Dialling Only | (0)+10 |
| 020 0473 | Free for National Dialling Only | (0)+10 |
| 020 0474 | Free for National Dialling Only | (0)+10 |
| 020 0475 | Free for National Dialling Only | (0)+10 |
| 020 0476 | Free for National Dialling Only | (0)+10 |
| 020 0477 | Free for National Dialling Only | (0)+10 |
| 020 0478 | Free for National Dialling Only | (0)+10 |
| 020 0479 | Free for National Dialling Only | (0)+10 |
| 020 0480 | Free for National Dialling Only | (0)+10 |
| 020 0481 | Free for National Dialling Only | (0)+10 |
| 020 0482 | Free for National Dialling Only | (0)+10 |
| 020 0483 | Free for National Dialling Only | (0)+10 |
| 020 0484 | Free for National Dialling Only | (0)+10 |
| 020 0485 | Free for National Dialling Only | (0)+10 |
| 020 0486 | Free for National Dialling Only | (0)+10 |
| 020 0487 | Free for National Dialling Only | (0)+10 |
| 020 0488 | Free for National Dialling Only | (0)+10 |
| 020 0489 | Free for National Dialling Only | (0)+10 |
| 020 0490 | Free for National Dialling Only | (0)+10 |
| 020 0491 | Free for National Dialling Only | (0)+10 |
| 020 0492 | Free for National Dialling Only | (0)+10 |
| 020 0493 | Free for National Dialling Only | (0)+10 |
| 020 0494 | Free for National Dialling Only | (0)+10 |
| 020 0495 | Free for National Dialling Only | (0)+10 |
| 020 0496 | Free for National Dialling Only | (0)+10 |
| 020 0497 | Free for National Dialling Only | (0)+10 |
| 020 0498 | Free for National Dialling Only | (0)+10 |
| 020 0499 | Free for National Dialling Only | (0)+10 |