- Prefix
01535 4- Area
- Keighley
- Number type
- Geographic landline (01/02)
- Format
01535 4XXXXX- From abroad
+44 1535 4XXXXX- Ofcom blocks in range
- 73
- Blocks in service
- 30
- Range holders
- 21
What are 01535 4XXXXX numbers?
Any UK number matching 01535 4XXXXX sits in the
01535 dialling code for Keighley.
Ofcom hands these numbers to communications providers in blocks; this range
contains 73 blocks, of which
30 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Keighley area — or
organisations elsewhere that keep a local 01535 presence using
VoIP.
Who holds 01535 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Vodafone Ltd (C&W) | 7 | 01535 410XXX |
| Sky UK Limited | 3 | 01535 431XXX |
| TalkTalk Communications Limited | 2 | 01535 443XXX |
| API Telecom Limited | 1 | 01535 432XXX |
| Bicom Systems EURL | 1 | 01535 434XXX |
| Content Guru Limited | 1 | 01535 438XXX |
| DRD Communications Limited | 1 | 01535 450XXX |
| Digital Space Group Limited | 1 | 01535 463XXX |
| Digitech Solutions Global Limited | 1 | 01535 430XXX |
| Flextel Limited | 1 | 01535 40XXXX |
| Fuse 2 Communications Ltd | 1 | 01535 446XXX |
| ICC Networks Ltd | 1 | 01535 433XXX |
…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 73 blocks Ofcom lists, 43 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 01535 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01535 caller IDs so their calls look like they come from Keighley (‘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 01535 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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