UK mobile number format: 07 prefixes, digits and +44 explained

A UK mobile number always has 11 digits and starts with 07. Here is how it is built, how to write it for callers abroad and what the prefix does and doesn’t tell you.

How many digits is a UK mobile number?

Eleven, counting the leading zero: 07 followed by nine more digits, for example 07700 900123. From abroad, drop the 0 and add the country code +44, which gives +44 7700 900123 (12 digits after the plus sign).

Which numbers starting with 07 are mobiles?

Mobile numbers use the 071 to 075 and 077 to 079 ranges (plus 07624 on the Isle of Man). Numbers starting 070 are personal numbers that forward calls and can cost more to ring, and 076 is mostly used for pagers. If you are buying a mobile number, make sure it sits in a mobile range. Every number we sell does.

How to write a UK mobile number

The most common layout is 07xxx xxxxxx (5 + 6). For memorable numbers it is better to group the digits so the pattern shows, for example 0777 03 28 777. The digits are the same whichever way you space them. On a website or email signature, add the +44 version so people abroad can tap to call.

Does the prefix tell you the network?

Not any more. Ofcom gives blocks of numbers to networks, but anyone can move a number to another network with a PAC code. A number that started on Vodafone may now be on EE or giffgaff, so the prefix only tells you where the number was first issued.

Can I choose my own number?

Networks hand out random numbers, but you can choose a specific one by buying it on a SIM and moving it to your network. Use the search on our shop to find digits you like, then follow the PAC guide.