- Prefix
01883 5- Area
- Caterham
- Number type
- Geographic landline (01/02)
- Format
01883 5XXXXX- From abroad
+44 1883 5XXXXX- Ofcom blocks in range
- 46
- Blocks in service
- 32
- Range holders
- 32
What are 01883 5XXXXX numbers?
Any UK number matching 01883 5XXXXX sits in the
01883 dialling code for Caterham.
Ofcom hands these numbers to communications providers in blocks; this range
contains 46 blocks, of which
32 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Caterham area — or
organisations elsewhere that keep a local 01883 presence using
VoIP.
Who holds 01883 5… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| 24 Seven Cloud Communications Ltd | 1 | 01883 589XXX |
| API Telecom Limited | 1 | 01883 593XXX |
| Atomstream Limited | 1 | 01883 570XXX |
| Bicom Systems EURL | 1 | 01883 590XXX |
| CFL Communications Ltd | 1 | 01883 54XXXX |
| Calltracks Limited | 1 | 01883 572XXX |
| Colt Technology Services | 1 | 01883 597XXX |
| Core Telecom Limited | 1 | 01883 574XXX |
| Hello Telecom (UK) Limited | 1 | 01883 591XXX |
| ICC Networks Ltd | 1 | 01883 594XXX |
| INTELLIGENT EXCHANGES LIMITED | 1 | 01883 583XXX |
| IOVOX Limited | 1 | 01883 596XXX |
…and 20 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 46 blocks Ofcom lists, 14 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 01883 5… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01883 caller IDs so their calls look like they come from Caterham (‘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 01883 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.
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