033011 UK-wide numbers
Ofcom’s numbering data lists 10 number ranges starting 033011, allocated to 8 providers. The largest holder is Chess Limited, with 10% 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 033011 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider2 ranges
- Chess Limited1 range
- Core Telecom Limited1 range
- Vonage Business Limited1 range
- Supported Business Limited1 range
- Syntec Limited1 range
- Localphone Limited1 range
- Nebula Cloud Limited1 range
- Fuse 2 Communications Ltd1 range
Range status
How Ofcom lists the ranges starting 033011.
Allocations by year
Explore by the next digit
Each block below starts 033011. Pick one to narrow it down.
What a 033011 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.
033011 numbers: common questions
Who owns 033011 numbers?
Ofcom allocated the ranges starting 033011 to Chess Limited, Core Telecom Limited, Vonage Business 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 033011 number from abroad?
Replace the leading 0 with +44. For example, a number starting 033011 becomes +44 33011 followed by the rest of the number.
How much does it cost to call a 033011 number?
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Is a call from a 033011 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 033011 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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