- Prefix
01245 9- Area
- Chelmsford
- Number type
- Geographic landline (01/02)
- Format
01245 9XXXXX- From abroad
+44 1245 9XXXXX- Ofcom blocks in range
- 91
- Blocks in service
- 83
- Range holders
- 58
What are 01245 9XXXXX numbers?
Any UK number matching 01245 9XXXXX sits in the
01245 dialling code for Chelmsford.
Ofcom hands these numbers to communications providers in blocks; this range
contains 91 blocks, of which
83 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Chelmsford area — or
organisations elsewhere that keep a local 01245 presence using
VoIP.
Who holds 01245 9… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Gamma Telecom Holdings Limited | 11 | 01245 943XXX |
| BT | 7 | 01245 914XXX |
| Colt Technology Services | 4 | 01245 955XXX |
| TalkTalk Communications Limited | 3 | 01245 901XXX |
| Barritel Limited | 2 | 01245 924XXX |
| GCI Network Solutions Limited | 2 | 01245 907XXX |
| Infinity Tracking Ltd | 2 | 01245 960XXX |
| Sky UK Limited | 2 | 01245 917XXX |
| 24 Seven Cloud Communications Ltd | 1 | 01245 971XXX |
| 8x8 UK Limited | 1 | 01245 921XXX |
| Alnitak GmbH | 1 | 01245 937XXX |
| Andrews & Arnold (Numbers) Ltd | 1 | 01245 910XXX |
…and 46 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 91 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 01245 9… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01245 caller IDs so their calls look like they come from Chelmsford (‘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 01245 9XXXXX 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 01245 number ranges
Full 01245 Chelmsford area-code guide › · All UK area codes ›