- Prefix
01858 4- Area
- Market
- Number type
- Geographic landline (01/02)
- Format
01858 4XXXXX- From abroad
+44 1858 4XXXXX- Ofcom blocks in range
- 37
- Blocks in service
- 24
- Range holders
- 14
What are 01858 4XXXXX numbers?
Any UK number matching 01858 4XXXXX sits in the
01858 dialling code for Market.
Ofcom hands these numbers to communications providers in blocks; this range
contains 37 blocks, of which
24 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 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Gamma Telecom Holdings Limited | 8 | 01858 450XXX |
| BT | 4 | 01858 41XXXX |
| Bicom Systems EURL | 1 | 01858 409XXX |
| Flextel Limited | 1 | 01858 49XXXX |
| Hello Telecom (UK) Limited | 1 | 01858 407XXX |
| Inet Telecoms Ltd (Voipfone) | 1 | 01858 405XXX |
| Internexus Networks Limited | 1 | 01858 406XXX |
| Linear Telecoms Limited | 1 | 01858 400XXX |
| Lumen Technologies UK Limited | 1 | 01858 42XXXX |
| Minotaur Telecom Limited | 1 | 01858 401XXX |
| Orbtalk Limited | 1 | 01858 402XXX |
| Simwood eSMS Limited | 1 | 01858 408XXX |
…and 2 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, 13 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 4… 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 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.