033 UK-wide numbers
Ofcom’s numbering data lists 2,305 number ranges starting 033, allocated to 258 providers. The largest holder is BT, with 4% of them. Non-geographic numbers used by public bodies, charities and businesses that want one number for the whole country. 030 is used by public sector and not-for-profit organisations.
Who were 033 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider1,690 ranges
- BT86 ranges
- Gamma Telecom Holdings Limited41 ranges
- Thumbtel Ltd26 ranges
- Vodafone Ltd (C&W)23 ranges
- GCI Network Solutions Limited22 ranges
- Colt Technology Services20 ranges
- Barritel Limited11 ranges
- TalkTalk Communications Limited10 ranges
- Windsor Telecom Limited8 ranges
- Glide Student and Residential Limited8 ranges
- Magrathea Telecommunications Limited7 ranges
+ 247 more
Range status
How Ofcom lists the ranges starting 033.
Allocations by year
Explore by the next digit
Each block below starts 033. Pick one to narrow it down.
What a 033 number tells you
What it is
Non-geographic numbers used by public bodies, charities and businesses that want one number for the whole country. 030 is used by public sector and not-for-profit organisations.
What it costs
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Watch out for
Banks and government departments often use 03 numbers, so scammers spoof them. If a caller asks for security details, hang up and call the number on your card or statement.
033 numbers: common questions
Who owns 033 numbers?
Ofcom allocated the ranges starting 033 to BT, Gamma Telecom Holdings Limited, Thumbtel Ltd 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 033 number from abroad?
Replace the leading 0 with +44. For example, a number starting 033 becomes +44 33 followed by the rest of the number.
How much does it cost to call a 033 number?
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Is a call from a 033 number a scam?
Banks and government departments often use 03 numbers, so scammers spoof them. If a caller asks for security details, hang up and call the number on your card or statement. 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 033 number call you?
Check the full number to see if it belongs to a verified UK business and what other people have reported.
UK phone numbers explained → · Let us screen unknown callers →