- Prefix
01277 5- Area
- Brentwood
- Number type
- Geographic landline (01/02)
- Format
01277 5XXXXX- From abroad
+44 1277 5XXXXX- Ofcom blocks in range
- 100
- Blocks in service
- 82
- Range holders
- 69
What are 01277 5XXXXX numbers?
Any UK number matching 01277 5XXXXX sits in the
01277 dialling code for Brentwood.
Ofcom hands these numbers to communications providers in blocks; this range
contains 100 blocks, of which
82 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Brentwood area — or
organisations elsewhere that keep a local 01277 presence using
VoIP.
Who holds 01277 5… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| TalkTalk Communications Limited | 4 | 01277 500XXX |
| BT | 3 | 01277 563XXX |
| Barritel Limited | 3 | 01277 517XXX |
| Gamma Telecom Holdings Limited | 3 | 01277 584XXX |
| Colt Technology Services | 2 | 01277 568XXX |
| Digital Space Group Limited | 2 | 01277 507XXX |
| Fuse 2 Communications Ltd | 2 | 01277 565XXX |
| GCI Network Solutions Limited | 2 | 01277 508XXX |
| (AQ) LIMITED | 1 | 01277 505XXX |
| Adepteo Limited | 1 | 01277 585XXX |
| Alnitak GmbH | 1 | 01277 574XXX |
| Andrews & Arnold (Numbers) Ltd | 1 | 01277 524XXX |
…and 57 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 100 blocks Ofcom lists, 17 are protected (reserved by Ofcom and not in use) and 1 are free/unallocated. A call appearing to come from an unallocated block is a strong sign of a spoofed number.
Is a call from a 01277 5… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01277 caller IDs so their calls look like they come from Brentwood (‘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 01277 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.
More 01277 number ranges
Full 01277 Brentwood area-code guide › · All UK area codes ›