- Prefix
01740 5- Area
- Sedgefield
- Number type
- Geographic landline (01/02)
- Format
01740 5XXXXX- From abroad
+44 1740 5XXXXX- Ofcom blocks in range
- 46
- Blocks in service
- 8
- Range holders
- 8
What are 01740 5XXXXX numbers?
Any UK number matching 01740 5XXXXX sits in the
01740 dialling code for Sedgefield.
Ofcom hands these numbers to communications providers in blocks; this range
contains 46 blocks, of which
8 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Sedgefield area — or
organisations elsewhere that keep a local 01740 presence using
VoIP.
Who holds 01740 5… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| AQL Wholesale Ltd | 1 | 01740 58XXXX |
| Barritel Limited | 1 | 01740 56XXXX |
| Flextel Limited | 1 | 01740 51XXXX |
| Six Degrees Technology Group Limited | 1 | 01740 504XXX |
| Spitfire Network Services Limited | 1 | 01740 577XXX |
| TGL Services (UK) Ltd | 1 | 01740 550XXX |
| TTNC Limited | 1 | 01740 59XXXX |
| VoiceHost Limited | 1 | 01740 555XXX |
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 46 blocks Ofcom lists, 34 are protected (reserved by Ofcom and not in use) and 4 are free/unallocated. A call appearing to come from an unallocated block is a strong sign of a spoofed number.
Is a call from a 01740 5… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01740 caller IDs so their calls look like they come from Sedgefield (‘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 01740 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.
Run mobiles for a business? See our business mobile network comparison or get a quote.
More 01740 number ranges
Full 01740 Sedgefield area-code guide › · All UK area codes ›