- Dialling code
01277- Area
- Brentwood
- Number type
- Geographic landline (01/02)
- Local format
01277 XXXXXX- From abroad
+44 1277 XXXXXX- Ofcom number blocks
- 415
- Blocks in service
- 186
- Range holders
- 105
Where is the 01277 area code?
The 01277 dialling code is the UK geographic area code for Brentwood. Because 01277 is a geographic (01/02) code, a number using it is tied to the Brentwood dialling-code area — though with modern hosted telephony (VoIP) a business can keep a 01277 number after moving premises, so the code reflects the number’s designated area rather than a guaranteed physical location today.
Ofcom currently lists 415 number blocks under 01277, of which 186 are allocated to 105 communications providers.
Brentwood phone number format
A Brentwood number is made up of a 5-digit area code followed by a 5 or 6-digit local number. Written in full it looks
like 01277 XXXXXX (the Xs stand for the local digits).
Ofcom has not reserved a fictitious drama range for 01277; for
on-screen examples it recommends the unused
01632 960000–01632 960999 range.
Who holds 01277 number ranges?
Ofcom allocates 01277 numbers to providers in blocks. These providers hold the largest allocations under 01277:
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| BT | 27 | 01277 20XXXX |
| Vodafone Ltd (C&W) | 14 | 01277 72XXXX |
| Virgin Media Limited | 9 | 01277 330XXX |
| Gamma Telecom Holdings Limited | 7 | 01277 28XXXX |
| TalkTalk Communications Limited | 5 | 01277 295XXX |
| Colt Technology Services | 4 | 01277 568XXX |
| GCI Network Solutions Limited | 4 | 01277 508XXX |
| Sky UK Limited | 4 | 01277 41XXXX |
…and 97 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.
01277 number ranges
Browse the allocated 01277 ranges by their first local digit — each guide lists the providers holding that slice of Brentwood’s numbers:
Call charges for 01277 numbers
Calls to 01277 geographic numbers are charged at your phone provider’s standard UK landline rate and are normally included in inclusive call minutes. UK-wide 03 numbers are guaranteed by Ofcom to cost the same as 01/02 calls, while 084, 087 and 09 numbers cost considerably more — always check the prefix before you dial.
Spotting spoofed 01277 scam calls
Fraudsters frequently spoof local dialling codes, faking the caller ID so a scam call appears to come from a Brentwood (01277) number you might trust. Remember:
- A familiar 01277 area code is not proof the caller is local or genuine — caller ID can be faked.
- Banks, HMRC and the police will never ask you to move money or share passwords or one-time codes over the phone.
- If a call feels off, hang up, wait a moment, and call the organisation back on a number from their official website or your statement.
- Report nuisance calls to the ICO and forward scam texts to 7726 (free).
Other dialling codes in this range
Numerically adjacent UK dialling codes:
Browse all UK area-code guides ›
Run mobiles for a business? See our business mobile network comparison or get a quote.