- Prefix
01604 3- Area
- Northampton
- Number type
- Geographic landline (01/02)
- Format
01604 3XXXXX- From abroad
+44 1604 3XXXXX- Ofcom blocks in range
- 100
- Blocks in service
- 79
- Range holders
- 33
What are 01604 3XXXXX numbers?
Any UK number matching 01604 3XXXXX sits in the
01604 dialling code for Northampton.
Ofcom hands these numbers to communications providers in blocks; this range
contains 100 blocks, of which
79 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Northampton area — or
organisations elsewhere that keep a local 01604 presence using
VoIP.
Who holds 01604 3… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| GCI Network Solutions Limited | 14 | 01604 321XXX |
| Gamma Telecom Holdings Limited | 11 | 01604 320XXX |
| Sky UK Limited | 7 | 01604 307XXX |
| Vodafone Ltd (C&W) | 7 | 01604 390XXX |
| TGL Services (UK) Ltd | 4 | 01604 350XXX |
| Colt Technology Services | 3 | 01604 344XXX |
| TalkTalk Communications Limited | 3 | 01604 315XXX |
| Voxbone SA | 3 | 01604 300XXX |
| BT | 2 | 01604 345XXX |
| IOVOX Limited | 2 | 01604 313XXX |
| 8x8 UK Limited | 1 | 01604 386XXX |
| API Telecom Limited | 1 | 01604 314XXX |
…and 21 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 100 blocks Ofcom lists, 21 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 01604 3… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01604 caller IDs so their calls look like they come from Northampton (‘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 01604 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 01604 number ranges
Full 01604 Northampton area-code guide › · All UK area codes ›