03 UK-wide numbers
Ofcom’s numbering data lists 13,726 number ranges starting 03, allocated to 274 providers. The largest holder is Vodafone Ltd (C&W), 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 03 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider10,258 ranges
- Vodafone Ltd (C&W)549 ranges
- BT428 ranges
- TalkTalk Communications Limited299 ranges
- GCI Network Solutions Limited235 ranges
- Gamma Telecom Holdings Limited183 ranges
- Virgin Media Limited160 ranges
- Colt Technology Services110 ranges
- Magrathea Telecommunications Limited66 ranges
- Core Telecom Limited64 ranges
- Lumen Technologies UK Limited50 ranges
- Six Degrees Technology Group Limited49 ranges
+ 263 more
Range status
How Ofcom lists the ranges starting 03.
Allocations by year
Explore by the next digit
Each block below starts 03. Pick one to narrow it down.
What a 03 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.
03 numbers: common questions
Who owns 03 numbers?
Ofcom allocated the ranges starting 03 to Vodafone Ltd (C&W), BT, TalkTalk Communications 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 03 number from abroad?
Replace the leading 0 with +44. For example, a number starting 03 becomes +44 3 followed by the rest of the number.
How much does it cost to call a 03 number?
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Is a call from a 03 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 03 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 →