0204 numbers in London
Numbers beginning 0204 are part of the London dialling area, whose area code is 020. Ofcom’s numbering data lists 200 number ranges starting 0204, allocated to 49 providers. The largest holder is Colt Technology Services, with 19% of them.
Who were 0204 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider47 ranges
- Colt Technology Services37 ranges
- Gamma Telecom Holdings Limited26 ranges
- BT25 ranges
- Voxbone SA8 ranges
- Twilio Ireland Limited4 ranges
- Hyperoptic Ltd4 ranges
- Verizon UK Limited3 ranges
- IOVOX Limited2 ranges
- TELNYX UK LIMITED2 ranges
- Voiceflex Limited2 ranges
- Magrathea Telecommunications Limited2 ranges
+ 38 more
Range status
How Ofcom lists the ranges starting 0204.
Allocations by year
Explore by the next digit
Each block below starts 0204. Pick one to narrow it down.
What a 0204 number tells you
What it is
Ordinary landline numbers tied to a place. The area code tells you which dialling area the number was issued for – 0161 is Manchester, 020 is London, 01388 is Bishop Auckland.
What it costs
Charged as a normal UK call and usually included in landline and mobile allowances.
Watch out for
A local-looking number feels familiar, which is exactly why scammers spoof them. A local area code is not proof the caller is local.
0204 numbers: common questions
Where is the 020 area code?
020 is the UK dialling code for London. Calls from a 020 number were made from a phone line issued for that area – although caller ID can be faked, so a local code is not proof the caller is local.
Who owns 0204 numbers?
Ofcom allocated the ranges starting 0204 to Colt Technology Services, Gamma Telecom Holdings Limited, BT and others. Numbers can be moved between providers, so this shows who the range was originally given to – not who is using a particular number today.
How do I call a 0204 number from abroad?
Replace the leading 0 with +44. For example, a number starting 020 becomes +44 20 followed by the rest of the number.
How much does it cost to call a 0204 number?
Charged as a normal UK call and usually included in landline and mobile allowances.
Is a call from a 0204 number a scam?
A local-looking number feels familiar, which is exactly why scammers spoof them. A local area code is not proof the caller is local. Check the full number on Who’s Calling to see if it belongs to a verified business and what other people have reported.
Did a 0204 number call you?
Check the full number to see if it belongs to a verified UK business and what other people have reported.
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