0333 UK-wide numbers
Ofcom’s numbering data lists 1,000 number ranges starting 0333, allocated to 135 providers. The largest holder is Gamma Telecom Holdings Limited, with 2% 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 0333 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider766 ranges
- Gamma Telecom Holdings Limited20 ranges
- Colt Technology Services16 ranges
- GCI Network Solutions Limited13 ranges
- TalkTalk Communications Limited9 ranges
- Glide Student and Residential Limited8 ranges
- Windsor Telecom Limited6 ranges
- Vodafone Ltd (C&W)5 ranges
- Numbers Telecom Limited4 ranges
- Magrathea Telecommunications Limited3 ranges
- Barritel Limited3 ranges
- Redcentric Solutions Limited3 ranges
+ 124 more
Range status
How Ofcom lists the ranges starting 0333.
Allocations by year
Explore by the next digit
Each block below starts 0333. Pick one to narrow it down.
What a 0333 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.
0333 numbers: common questions
Who owns 0333 numbers?
Ofcom allocated the ranges starting 0333 to Gamma Telecom Holdings Limited, Colt Technology Services, GCI Network Solutions Limited 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 0333 number from abroad?
Replace the leading 0 with +44. For example, a number starting 0333 becomes +44 333 followed by the rest of the number.
How much does it cost to call a 0333 number?
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Is a call from a 0333 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 0333 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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