- Prefix
01538 4- Area
- Ipstones
- Number type
- Geographic landline (01/02)
- Format
01538 4XXXXX- From abroad
+44 1538 4XXXXX- Ofcom blocks in range
- 46
- Blocks in service
- 8
- Range holders
- 7
What are 01538 4XXXXX numbers?
Any UK number matching 01538 4XXXXX sits in the
01538 dialling code for Ipstones.
Ofcom hands these numbers to communications providers in blocks; this range
contains 46 blocks, of which
8 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Ipstones area — or
organisations elsewhere that keep a local 01538 presence using
VoIP.
Who holds 01538 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Six Degrees Technology Group Limited | 2 | 01538 450XXX |
| BT | 1 | 01538 48XXXX |
| Served Up Limited | 1 | 01538 41XXXX |
| Sky UK Limited | 1 | 01538 42XXXX |
| Spitfire Network Services Limited | 1 | 01538 477XXX |
| TTNC Limited | 1 | 01538 43XXXX |
| Voiceflex Limited | 1 | 01538 49XXXX |
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, 33 are protected (reserved by Ofcom and not in use) and 5 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 01538 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01538 caller IDs so their calls look like they come from Ipstones (‘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 01538 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.
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