03 numbers: 0300, 0330, 0333 and 0345
UK-wide numbers with no area code, charged like a normal landline call.
What 03 numbers are for
An 03 number connects to the same organisation from anywhere in the UK, so banks, energy companies, shops, councils and charities use them for their customer lines. Calling one costs the same as an 01 or 02 landline call and uses up your inclusive minutes. They aren't free, but they're never premium.
Because anyone can rent an 03 number, having one on your screen doesn't prove the caller is who they say they are. Look up the whole number above before calling back.
The 03 ranges
| Prefix | Typically used by | Numbers we hold |
|---|---|---|
| 0300 | Councils, government departments, the NHS, charities and other non-profit organisations | 64 numbers |
| 0330 | Banks, shops, energy suppliers and any organisation wanting a single national number | 821 numbers |
| 0333 | Banks, shops, energy suppliers and any organisation wanting a single national number | 1,132 numbers |
| 0344 | Organisations wanting one phone number that works across the UK | 66 numbers |
| 0345 | Organisations wanting one phone number that works across the UK | 131 numbers |
Looking for "03330" or "03334"? They're part of 0333, so see the 0333 page.
Want a number that's free to call?
These freephone ranges cost nothing to call from UK landlines and mobiles.
Questions about 03 numbers
What is an 03 number?
A UK-wide number that isn't tied to any town. Organisations use them so that people anywhere in the country can call one number. The main ranges are 0300, 0330, 0333, 0344 and 0345.
Are 03 numbers free to call?
No, but they never cost more than calling an 01 or 02 landline, and they come out of your inclusive minutes. The free ranges are 0800 and 0808.
Is 0333 an area code?
No. None of the 03 numbers are area codes, because they aren't linked to a place. Only 01 and 02 numbers have area codes.
What's the difference between 0300, 0330 and 0333?
Only public bodies, charities and non-profits can have 0300 numbers. 0330 and 0333 are available to any organisation. All three cost the same to call.
Who called me from an 03 number?
Most likely a bank, utility, retailer, council or charity, but scammers can rent 03 numbers too or fake one on caller ID. Look up the number before you call back, and never read out a security code.
See also: our who called me UK guide, the area code finder and 07 mobile prefixes.