- Prefix
01389 6- Area
- Dumbarton
- Number type
- Geographic landline (01/02)
- Format
01389 6XXXXX- From abroad
+44 1389 6XXXXX- Ofcom blocks in range
- 64
- Blocks in service
- 6
- Range holders
- 6
What are 01389 6XXXXX numbers?
Any UK number matching 01389 6XXXXX sits in the
01389 dialling code for Dumbarton.
Ofcom hands these numbers to communications providers in blocks; this range
contains 64 blocks, of which
6 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Dumbarton area — or
organisations elsewhere that keep a local 01389 presence using
VoIP.
Who holds 01389 6… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| AQL Wholesale Ltd | 1 | 01389 65XXXX |
| Chess Limited | 1 | 01389 635XXX |
| Citrus Telecommunications Ltd | 1 | 01389 66XXXX |
| Six Degrees Technology Group Limited | 1 | 01389 694XXX |
| Spitfire Network Services Limited | 1 | 01389 677XXX |
| Virgin Media Limited | 1 | 01389 60XXXX |
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 64 blocks Ofcom lists, 58 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 01389 6… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01389 caller IDs so their calls look like they come from Dumbarton (‘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 01389 6XXXXX 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 01389 number ranges
Full 01389 Dumbarton area-code guide › · All UK area codes ›