03700 UK-wide numbers
Ofcom’s numbering data lists 100 number ranges starting 03700, allocated to 26 providers. The largest holder is Vodafone Ltd (C&W), with 16% 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 03700 ranges given to?
Providers Ofcom allocated these number ranges to.
- Not allocated to a provider28 ranges
- Vodafone Ltd (C&W)16 ranges
- Vodafone Limited10 ranges
- TalkTalk Communications Limited8 ranges
- Virgin Media Limited6 ranges
- GCI Network Solutions Limited6 ranges
- Dynamic Mobile Billing Limited2 ranges
- Redcentric Solutions Limited2 ranges
- Verizon UK Limited2 ranges
- TelXL Limited2 ranges
- Lumen Technologies UK Limited2 ranges
- Colt Technology Services1 range
+ 15 more
Range status
How Ofcom lists the ranges starting 03700.
Allocations by year
Explore by the next digit
Each block below starts 03700. Pick one to narrow it down.
What a 03700 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.
03700 numbers: common questions
Who owns 03700 numbers?
Ofcom allocated the ranges starting 03700 to Vodafone Ltd (C&W), Vodafone Limited, 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 03700 number from abroad?
Replace the leading 0 with +44. For example, a number starting 03700 becomes +44 3700 followed by the rest of the number.
How much does it cost to call a 03700 number?
Never cost more than calling an 01 or 02 number, and count towards inclusive minutes.
Is a call from a 03700 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 03700 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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