- Prefix
01223 4- Area
- Cambridge
- Number type
- Geographic landline (01/02)
- Format
01223 4XXXXX- From abroad
+44 1223 4XXXXX- Ofcom blocks in range
- 55
- Blocks in service
- 51
- Range holders
- 8
What are 01223 4XXXXX numbers?
Any UK number matching 01223 4XXXXX sits in the
01223 dialling code for Cambridge.
Ofcom hands these numbers to communications providers in blocks; this range
contains 55 blocks, of which
51 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Cambridge area — or
organisations elsewhere that keep a local 01223 presence using
VoIP.
Who holds 01223 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| BT | 44 | 01223 400XXX |
| Ccpro Solutions Limited | 1 | 01223 489XXX |
| Colt Technology Services | 1 | 01223 482XXX |
| Datazero Ltd | 1 | 01223 430XXX |
| Gamma Telecom Holdings Limited | 1 | 01223 483XXX |
| Sky UK Limited | 1 | 01223 490XXX |
| Virgin Media Limited | 1 | 01223 47XXXX |
| Voiceflex Limited | 1 | 01223 439XXX |
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, 3 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 01223 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01223 caller IDs so their calls look like they come from Cambridge (‘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 01223 4XXXXX 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 01223 number ranges
Full 01223 Cambridge area-code guide › · All UK area codes ›