- Prefix
01621 4- Area
- Maldon
- Number type
- Geographic landline (01/02)
- Format
01621 4XXXXX- From abroad
+44 1621 4XXXXX- Ofcom blocks in range
- 55
- Blocks in service
- 48
- Range holders
- 46
What are 01621 4XXXXX numbers?
Any UK number matching 01621 4XXXXX sits in the
01621 dialling code for Maldon.
Ofcom hands these numbers to communications providers in blocks; this range
contains 55 blocks, of which
48 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Maldon area — or
organisations elsewhere that keep a local 01621 presence using
VoIP.
Who holds 01621 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| Datazero Ltd | 2 | 01621 469XXX |
| Fuse 2 Communications Ltd | 2 | 01621 477XXX |
| 24 Seven Cloud Communications Ltd | 1 | 01621 497XXX |
| API Telecom Limited | 1 | 01621 463XXX |
| Adepteo Limited | 1 | 01621 481XXX |
| Atomstream Limited | 1 | 01621 456XXX |
| BT | 1 | 01621 493XXX |
| Bicom Systems EURL | 1 | 01621 462XXX |
| CFL Communications Ltd | 1 | 01621 43XXXX |
| Calltracks Limited | 1 | 01621 450XXX |
| Colt Technology Services | 1 | 01621 484XXX |
| Content Guru Limited | 1 | 01621 470XXX |
…and 34 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, 7 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 01621 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01621 caller IDs so their calls look like they come from Maldon (‘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 01621 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.
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