- Prefix
01436 4- Area
- Helensburgh
- Number type
- Geographic landline (01/02)
- Format
01436 4XXXXX- From abroad
+44 1436 4XXXXX- Ofcom blocks in range
- 46
- Blocks in service
- 22
- Range holders
- 22
What are 01436 4XXXXX numbers?
Any UK number matching 01436 4XXXXX sits in the
01436 dialling code for Helensburgh.
Ofcom hands these numbers to communications providers in blocks; this range
contains 46 blocks, of which
22 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Helensburgh area — or
organisations elsewhere that keep a local 01436 presence using
VoIP.
Who holds 01436 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| API Telecom Limited | 1 | 01436 407XXX |
| AQL Wholesale Ltd | 1 | 01436 45XXXX |
| Bicom Systems EURL | 1 | 01436 405XXX |
| ICC Networks Ltd | 1 | 01436 408XXX |
| INTELLIGENT EXCHANGES LIMITED | 1 | 01436 426XXX |
| IOVOX Limited | 1 | 01436 428XXX |
| Internexus Networks Limited | 1 | 01436 403XXX |
| Invoco Ltd | 1 | 01436 402XXX |
| Invosys Limited | 1 | 01436 422XXX |
| Nexbridge Communications Limited | 1 | 01436 424XXX |
| Orbtalk Limited | 1 | 01436 409XXX |
| Phone Co-Op Numbering Limited | 1 | 01436 421XXX |
…and 10 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 46 blocks Ofcom lists, 24 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 01436 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01436 caller IDs so their calls look like they come from Helensburgh (‘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 01436 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.
More 01436 number ranges
Full 01436 Helensburgh area-code guide › · All UK area codes ›