- Prefix
01556 5- Area
- Castle Douglas
- Number type
- Geographic landline (01/02)
- Format
01556 5XXXXX- From abroad
+44 1556 5XXXXX- Ofcom blocks in range
- 37
- Blocks in service
- 23
- Range holders
- 21
What are 01556 5XXXXX numbers?
Any UK number matching 01556 5XXXXX sits in the
01556 dialling code for Castle Douglas.
Ofcom hands these numbers to communications providers in blocks; this range
contains 37 blocks, of which
23 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Castle Douglas area — or
organisations elsewhere that keep a local 01556 presence using
VoIP.
Who holds 01556 5… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| BT | 3 | 01556 50XXXX |
| 24 Seven Cloud Communications Ltd | 1 | 01556 536XXX |
| Belgacom International Carrier Services SA | 1 | 01556 538XXX |
| Bink Networks Ltd | 1 | 01556 541XXX |
| DIDWW Ireland Limited | 1 | 01556 531XXX |
| Dial 9 Communications Limited | 1 | 01556 535XXX |
| Digitech Solutions Global Limited | 1 | 01556 590XXX |
| EVE CONNECT LTD | 1 | 01556 533XXX |
| Flextel Limited | 1 | 01556 57XXXX |
| Gamma Telecom Holdings Limited | 1 | 01556 51XXXX |
| I.T Communications Limited | 1 | 01556 534XXX |
| ICUK Computing Services Limited | 1 | 01556 532XXX |
…and 9 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 37 blocks Ofcom lists, 6 are protected (reserved by Ofcom and not in use) and 8 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 01556 5… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01556 caller IDs so their calls look like they come from Castle Douglas (‘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 01556 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.
Run mobiles for a business? See our business mobile network comparison or get a quote.
More 01556 number ranges
Full 01556 Castle Douglas area-code guide › · All UK area codes ›