- Prefix
01858 5- Area
- Market
- Number type
- Geographic landline (01/02)
- Format
01858 5XXXXX- From abroad
+44 1858 5XXXXX- Ofcom blocks in range
- 37
- Blocks in service
- 19
- Range holders
- 9
What are 01858 5XXXXX numbers?
Any UK number matching 01858 5XXXXX sits in the
01858 dialling code for Market.
Ofcom hands these numbers to communications providers in blocks; this range
contains 37 blocks, of which
19 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Market area — or
organisations elsewhere that keep a local 01858 presence using
VoIP.
Who holds 01858 5… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| BT | 6 | 01858 52XXXX |
| GCI Network Solutions Limited | 6 | 01858 580XXX |
| API Telecom Limited | 1 | 01858 512XXX |
| Content Guru Limited | 1 | 01858 518XXX |
| Digitech Solutions Global Limited | 1 | 01858 510XXX |
| ICC Networks Ltd | 1 | 01858 516XXX |
| IOVOX Limited | 1 | 01858 513XXX |
| Invoco Ltd | 1 | 01858 515XXX |
| Ziron Limited | 1 | 01858 517XXX |
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, 18 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 01858 5… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01858 caller IDs so their calls look like they come from Market (‘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 01858 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.
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