- Prefix
01555 4- Area
- Lanark
- Number type
- Geographic landline (01/02)
- Format
01555 4XXXXX- From abroad
+44 1555 4XXXXX- Ofcom blocks in range
- 73
- Blocks in service
- 54
- Range holders
- 50
What are 01555 4XXXXX numbers?
Any UK number matching 01555 4XXXXX sits in the
01555 dialling code for Lanark.
Ofcom hands these numbers to communications providers in blocks; this range
contains 73 blocks, of which
54 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Lanark area — or
organisations elsewhere that keep a local 01555 presence using
VoIP.
Who holds 01555 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Sky UK Limited | 4 | 01555 445XXX |
| Fuse 2 Communications Ltd | 2 | 01555 474XXX |
| API Telecom Limited | 1 | 01555 452XXX |
| Adepteo Limited | 1 | 01555 480XXX |
| Atomstream Limited | 1 | 01555 433XXX |
| Bink Networks Ltd | 1 | 01555 499XXX |
| CFL Communications Ltd | 1 | 01555 40XXXX |
| Calltracks Limited | 1 | 01555 431XXX |
| Colt Technology Services | 1 | 01555 476XXX |
| Content Guru Limited | 1 | 01555 465XXX |
| Convergence Group (wireless) Networks Limited | 1 | 01555 471XXX |
| DIDWW Ireland Limited | 1 | 01555 479XXX |
…and 38 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 73 blocks Ofcom lists, 12 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 01555 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01555 caller IDs so their calls look like they come from Lanark (‘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 01555 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.