- Prefix
01633 4- Area
- Newport
- Number type
- Geographic landline (01/02)
- Format
01633 4XXXXX- From abroad
+44 1633 4XXXXX- Ofcom blocks in range
- 46
- Blocks in service
- 41
- Range holders
- 20
What are 01633 4XXXXX numbers?
Any UK number matching 01633 4XXXXX sits in the
01633 dialling code for Newport.
Ofcom hands these numbers to communications providers in blocks; this range
contains 46 blocks, of which
41 are allocated and usable. Calls from these
numbers are typically homes and businesses in the Newport area — or
organisations elsewhere that keep a local 01633 presence using
VoIP.
Who holds 01633 4… number ranges?
| Range holder (allocated by Ofcom) | Number blocks | Example range |
|---|---|---|
| BT | 18 | 01633 400XXX |
| Gamma Telecom Holdings Limited | 3 | 01633 492XXX |
| Vodafone Ltd (C&W) | 3 | 01633 46XXXX |
| Calltracks Limited | 1 | 01633 407XXX |
| Datazero Ltd | 1 | 01633 408XXX |
| Digitech Solutions Global Limited | 1 | 01633 405XXX |
| EVE CONNECT LTD | 1 | 01633 490XXX |
| Firstsound Ltd | 1 | 01633 458XXX |
| I.T Communications Limited | 1 | 01633 491XXX |
| ICUK Computing Services Limited | 1 | 01633 497XXX |
| INTELLIGENT EXCHANGES LIMITED | 1 | 01633 454XXX |
| Invosys Limited | 1 | 01633 453XXX |
…and 8 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, 5 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 01633 4… number safe?
A local-looking number is never proof of who is calling: fraudsters spoof 01633 caller IDs so their calls look like they come from Newport (‘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 01633 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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