Everything about Telephone Area Codes Looking for UK telephone area codes? Our telephone number instrument would definitely assist you hunt for areas and codes. In fact we have an absolute guide for the telephone numbers in the UK, comprises telephone area codes as well as special phone number prefixes. All you have to do is to enter the codes or prefixes to come across the location or service this is for, or find out the place to obtain its area code. In addition included are facts regarding other telephone number prefixes designed for mobile phones, premium rate services along with big business line!