- Prefix
01777 5- Area
- Retford
- Number type
- Geographic landline (01/02)
- Format
01777 5XXXXX- From abroad
+44 1777 5XXXXX- Ofcom blocks in range
- 55
- Blocks in service
- 46
- Range holders
- 44
What are 01777 5XXXXX numbers?
Any UK number matching 01777 5XXXXX sits in the
01777 dialling code for Retford.
Ofcom hands these numbers to communications providers in blocks; this range
contains 55 blocks, of which
46 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Retford area — or
organisations elsewhere that keep a local 01777 presence using
VoIP.
Who holds 01777 5… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Calltracks Limited | 2 | 01777 550XXX |
| Fuse 2 Communications Ltd | 2 | 01777 577XXX |
| 24 Seven Cloud Communications Ltd | 1 | 01777 584XXX |
| API Telecom Limited | 1 | 01777 564XXX |
| Adepteo Limited | 1 | 01777 585XXX |
| Alnitak GmbH | 1 | 01777 579XXX |
| Andrews & Arnold (Numbers) Ltd | 1 | 01777 50XXXX |
| Atomstream Limited | 1 | 01777 554XXX |
| CFL Communications Ltd | 1 | 01777 52XXXX |
| Colt Technology Services | 1 | 01777 573XXX |
| Content Guru Limited | 1 | 01777 591XXX |
| Convergence Group (wireless) Networks Limited | 1 | 01777 571XXX |
…and 32 more providers hold smaller allocations in this range.
Ofcom’s data shows the provider each number range was originally allocated to — not who holds an individual number today. Numbers are frequently moved (ported) between providers, and no public database reveals the person or business behind a specific number, so treat any service that claims to with suspicion.
Not every block in this range is in service: of the 55 blocks Ofcom lists, 8 are protected (reserved by Ofcom and not in use). A call appearing to come from an unallocated block is a strong sign of a spoofed number.
Is a call from a 01777 5… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01777 caller IDs so their calls look like they come from Retford (‘neighbour spoofing’). If an unexpected caller asks for personal, banking or one-time-code details, hang up and ring the organisation back on a number you find independently. To put a name to a caller, see who called me?; to report one, see how to report a scam number.
Check a specific 01777 5XXXXX number
Paste any full number into the checker above (or on the main phone number checker) to see its exact range holder and allocation status from this week’s Ofcom data.
Run mobiles for a business? See our business mobile network comparison or get a quote.