- Prefix
01871 4- Area
- Castlebay
- Number type
- Geographic landline (01/02)
- Format
01871 4XXXXX- From abroad
+44 1871 4XXXXX- Ofcom blocks in range
- 64
- Blocks in service
- 42
- Range holders
- 41
What are 01871 4XXXXX numbers?
Any UK number matching 01871 4XXXXX sits in the
01871 dialling code for Castlebay.
Ofcom hands these numbers to communications providers in blocks; this range
contains 64 blocks, of which
42 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Castlebay area — or
organisations elsewhere that keep a local 01871 presence using
VoIP.
Who holds 01871 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Fuse 2 Communications Ltd | 2 | 01871 464XXX |
| 24 Seven Cloud Communications Ltd | 1 | 01871 479XXX |
| API Telecom Limited | 1 | 01871 459XXX |
| Adepteo Limited | 1 | 01871 452XXX |
| Alnitak GmbH | 1 | 01871 478XXX |
| Atomstream Limited | 1 | 01871 430XXX |
| Belgacom International Carrier Services SA | 1 | 01871 488XXX |
| Bicom Systems EURL | 1 | 01871 456XXX |
| Bink Networks Ltd | 1 | 01871 487XXX |
| CFL Communications Ltd | 1 | 01871 41XXXX |
| Colt Technology Services | 1 | 01871 461XXX |
| Dial 9 Communications Limited | 1 | 01871 476XXX |
…and 29 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 64 blocks Ofcom lists, 15 are protected (reserved by Ofcom and not in use) and 7 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 01871 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01871 caller IDs so their calls look like they come from Castlebay (‘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 01871 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 01871 number ranges
Full 01871 Castlebay area-code guide › · All UK area codes ›