This page contains information about which telephone companies the various 0555 numbers are allocated to.
| First Digits | Status | Communications Provider | Notes | Change |
|---|---|---|---|---|
| 055 5500 | Allocated | FleXtel Limited | 10 Digit Numbers | 10/2004 |
| 055 5501 | Free | - | 10 Digit Numbers | - |
| 055 5502 | Free | - | 10 Digit Numbers | - |
| 055 5503 | Free | - | 10 Digit Numbers | - |
| 055 5504 | Free | - | 10 Digit Numbers | - |
| 055 5505 | Allocated | CFL Communications Limited | 10 Digit Numbers | 04/2014 |
| 055 5506 | Free | - | 10 Digit Numbers | - |
| 055 5507 | Free | - | 10 Digit Numbers | - |
| 055 5508 | Allocated | Verizon UK Ltd | 10 Digit Numbers | 12/2004 |
| 055 5509 | Free | - | 10 Digit Numbers | - |
| 055 5510 | Allocated | FleXtel Limited | 10 Digit Numbers | 10/2004 |
| 055 5511 | Free | - | 10 Digit Numbers | - |
| 055 5512 | Free | - | 10 Digit Numbers | - |
| 055 5513 | Free | - | 10 Digit Numbers | - |
| 055 5514 | Free | - | 10 Digit Numbers | - |
| 055 5515 | Free | - | 10 Digit Numbers | - |
| 055 5516 | Free | - | 10 Digit Numbers | - |
| 055 5517 | Free | - | 10 Digit Numbers | - |
| 055 5518 | Free | - | 10 Digit Numbers | - |
| 055 5519 | Free | - | 10 Digit Numbers | - |
| 055 5520 | Free | - | 10 Digit Numbers | - |
| 055 5521 | Free | - | 10 Digit Numbers | - |
| 055 5522 | Free | - | 10 Digit Numbers | - |
| 055 5523 | Free | - | 10 Digit Numbers | - |
| 055 5524 | Free | - | 10 Digit Numbers | - |
| 055 5525 | Free | - | 10 Digit Numbers | - |
| 055 5526 | Free | - | 10 Digit Numbers | - |
| 055 5527 | Free | - | 10 Digit Numbers | - |
| 055 5528 | Free | - | 10 Digit Numbers | - |
| 055 5529 | Free | - | 10 Digit Numbers | - |
| 055 5530 | Free | - | 10 Digit Numbers | - |
| 055 5531 | Free | - | 10 Digit Numbers | - |
| 055 5532 | Free | - | 10 Digit Numbers | - |
| 055 5533 | Free | - | 10 Digit Numbers | - |
| 055 5534 | Free | - | 10 Digit Numbers | - |
| 055 5535 | Free | - | 10 Digit Numbers | - |
| 055 5536 | Free | - | 10 Digit Numbers | - |
| 055 5537 | Allocated | 24 Seven Communications Ltd | 10 Digit Numbers | 07/2010 |
| 055 5538 | Free | - | 10 Digit Numbers | - |
| 055 5539 | Free | - | 10 Digit Numbers | - |
| 055 5540 | Allocated | Andrews & Arnold Ltd | 10 Digit Numbers | 10/2006 |
| 055 5541 | Free | - | 10 Digit Numbers | - |
| 055 5542 | Free | - | 10 Digit Numbers | - |
| 055 5543 | Free | - | 10 Digit Numbers | - |
| 055 5544 | Free | - | 10 Digit Numbers | - |
| 055 5545 | Free | - | 10 Digit Numbers | - |
| 055 5546 | Free | - | 10 Digit Numbers | - |
| 055 5547 | Free | - | 10 Digit Numbers | - |
| 055 5548 | Free | - | 10 Digit Numbers | - |
| 055 5549 | Free | - | 10 Digit Numbers | - |
| 055 5550 | Allocated | Nationwide Telephone Assistance Ltd | 10 Digit Numbers | 09/2006 |
| 055 5551 | Free | - | 10 Digit Numbers | - |
| 055 5552 | Free | - | 10 Digit Numbers | - |
| 055 5553 | Free | - | 10 Digit Numbers | - |
| 055 5554 | Free | - | 10 Digit Numbers | - |
| 055 5555 | Allocated | FleXtel Limited | 10 Digit Numbers | 07/2004 |
| 055 5556 | Allocated | Spacetel UK Ltd | 10 Digit Numbers | 09/2011 |
| 055 5557 | Free | - | 10 Digit Numbers | - |
| 055 5558 | Free | - | 10 Digit Numbers | - |
| 055 5559 | Free | - | 10 Digit Numbers | - |
| 055 5560 | Free | - | 10 Digit Numbers | - |
| 055 5561 | Free | - | 10 Digit Numbers | - |
| 055 5562 | Free | - | 10 Digit Numbers | - |
| 055 5563 | Free | - | 10 Digit Numbers | - |
| 055 5564 | Free | - | 10 Digit Numbers | - |
| 055 5565 | Free | - | 10 Digit Numbers | - |
| 055 5566 | Allocated | Syntec Limited | 10 Digit Numbers | 12/2004 |
| 055 5567 | Free | - | 10 Digit Numbers | - |
| 055 5568 | Free | - | 10 Digit Numbers | - |
| 055 5569 | Free | - | 10 Digit Numbers | - |
| 055 5570 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5571 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5572 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5573 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5574 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5575 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5576 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5577 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5578 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5579 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5580 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5581 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5582 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5583 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5584 | Allocated | Network Rail Infrastructure Limited | 10 Digit Numbers | 01/2005 |
| 055 5585 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5586 | Allocated | Network Rail Infrastructure Limited | 10 Digit Numbers | 01/2005 |
| 055 5587 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5588 | Allocated | Network Rail Infrastructure Limited | 10 Digit Numbers | 01/2005 |
| 055 5589 | Allocated | Network Rail Infrastructure Limited | 10 Digit Numbers | 01/2005 |
| 055 5590 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5591 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5592 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5593 | Allocated | Network Rail Infrastructure Limited | 10 Digit Numbers | 01/2005 |
| 055 5594 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5595 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5596 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5597 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5598 | Reserved | Withheld | 10 Digit Numbers | - |
| 055 5599 | Reserved | Withheld | 10 Digit Numbers | - |