Who called me from 0204?
Enter the full number below to see its Ofcom allocation, location and community reports — free, no sign-up.
What is the 0204 prefix?
Numbers beginning 0204 are London geographic numbers under the (020) dialling code. Genuine local businesses and households use them — but geographic prefixes are also routinely spoofed by VoIP callers overseas to make cold calls look local.
Every 0204 number sits inside a numbered block that Ofcom has allocated to a specific communications provider. The provider may run the numbers itself or sub-allocate them to resellers, which is why one prefix can be used by many unrelated organisations — and why the same prefix can produce both genuine calls and nuisance campaigns in the same week.
Most-searched 0204 numbers
The 0204 numbers UK users have looked up most on this site. Click any number for its full report page.
| Number | Times checked | Last checked |
|---|---|---|
| 020 4654 1888 | 4 | 2 days ago |
| 020 4654 2796 | 3 | 6 days ago |
| 020 4579 1686 | 2 | 11 hours ago |
| 020 4635 8752 | 1 | 1 day ago |
| 020 4638 3796 | 1 | 1 day ago |
| 020 4620 6437 | 1 | 2 days ago |
| 020 4638 5704 | 1 | 4 days ago |
| 020 4549 8622 | 1 | 2 weeks ago |
How to handle unwanted 0204 calls
- Identify before you trust. Look the full number up here first — the Ofcom allocation plus community reports usually settles it in seconds.
- Don't call back blind. Missed-call scams rely on the return call.
- Block repeat offenders from your recent-calls list, and enable your network's free call screening.
- Report the bad ones — to this site (so other users see it), to Ofcom for nuisance calls, and to Action Fraud for scams.
Ofcom number blocks under 0204
Allocated ranges starting 0204 and who holds them:
Frequently asked questions
Who called me from a 0204 number?
A 0204 number is a UK dialling prefix associated with London. The prefix alone can't identify the caller — look up the full 11-digit number on this site to see its Ofcom allocation and what other UK users have reported about it.
Are 0204 numbers safe to answer?
Most calls from any UK prefix are legitimate, but 0204 appears frequently in 'who called me' searches, which usually indicates heavy telemarketing or scam use of the range. Answer if you wish, but never share security details, one-time passcodes or payment information with an unexpected caller, and don't call back numbers you don't recognise.
How do I block calls from 0204 numbers?
Phones block individual numbers rather than whole prefixes: open your recent calls, tap the number and choose 'Block this caller'. For heavier protection, enable your network's call-screening service (free on BT, Sky, TalkTalk, Virgin Media and the mobile networks) and register with the Telephone Preference Service to cut legitimate marketing calls.
Why do I keep getting calls from different 0204 numbers?
Call centres and scam operations rotate through large pools of numbers in the same range, so blocking one 0204 number rarely stops the campaign. The pattern of many similar-looking numbers calling in sequence is itself a strong signal of an automated dialling operation rather than a genuine caller.
