- Prefix
01638 3- Area
- Newmarket
- Number type
- Geographic landline (01/02)
- Format
01638 3XXXXX- From abroad
+44 1638 3XXXXX- Ofcom blocks in range
- 55
- Blocks in service
- 32
- Range holders
- 31
What are 01638 3XXXXX numbers?
Any UK number matching 01638 3XXXXX sits in the
01638 dialling code for Newmarket.
Ofcom hands these numbers to communications providers in blocks; this range
contains 55 blocks, of which
32 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Newmarket area — or
organisations elsewhere that keep a local 01638 presence using
VoIP.
Who holds 01638 3… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Six Degrees Technology Group Limited | 2 | 01638 390XXX |
| 24 Seven Cloud Communications Ltd | 1 | 01638 351XXX |
| API Telecom Limited | 1 | 01638 316XXX |
| Adepteo Limited | 1 | 01638 335XXX |
| BT | 1 | 01638 354XXX |
| Belgacom International Carrier Services SA | 1 | 01638 356XXX |
| Bicom Systems EURL | 1 | 01638 314XXX |
| Colt Technology Services | 1 | 01638 358XXX |
| DIDWW Ireland Limited | 1 | 01638 353XXX |
| Dial 9 Communications Limited | 1 | 01638 359XXX |
| EVE CONNECT LTD | 1 | 01638 350XXX |
| Flextel Limited | 1 | 01638 34XXXX |
…and 19 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 55 blocks Ofcom lists, 23 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 01638 3… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01638 caller IDs so their calls look like they come from Newmarket (‘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 01638 3XXXXX 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 01638 number ranges
Full 01638 Newmarket area-code guide › · All UK area codes ›