03305 UK-wide numbers
Ofcom’s numbering data lists 100 number ranges starting 03305, allocated to 11 providers. The largest holder is Served Up 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 03305 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider87 ranges
- Served Up Limited2 ranges
- Orange Business Holdings UK Limited2 ranges
- Colt Technology Services1 range
- Windsor Telecom Limited1 range
- Citrus Telecommunications Ltd1 range
- SiPalto Ltd1 range
- Square Systems Limited1 range
- Nuso Cloud UK Limited1 range
- Simwood eSMS Limited1 range
- SMARTVOICE LTD1 range
- Atomstream Limited1 range
Range status
How Ofcom lists the ranges starting 03305.
Allocations by year
Explore by the next digit
Each block below starts 03305. Pick one to narrow it down.
What a 03305 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.
03305 numbers: common questions
Who owns 03305 numbers?
Ofcom allocated the ranges starting 03305 to Served Up Limited, Orange Business Holdings UK Limited, Colt Technology Services 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 03305 number from abroad?
Replace the leading 0 with +44. For example, a number starting 03305 becomes +44 3305 followed by the rest of the number.
How much does it cost to call a 03305 number?
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Is a call from a 03305 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 03305 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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