In the United Kingdom, area codes are two, three, four or, exceptionally, five digits long (after the initial zero). Regions with shorter area codes, typically large cities, permit the allocation of more telephone numbers as the local number portion has more digits. Local customer numbers are four to eight digits long.
Initial allocations with 10 digits: freephone 0800 numbers. The longest telephone numbers in use until now had been 9 digits long (not including the 0 trunk code), e.g. 051 234 5678, 0303 456789, 03873 56789, 0800 445566.
- Emergency services, (police, fire, ambulance, coastguard, mountain rescue, cave rescue)
Numbers beginning 01 or 02 are normal phone numbers for home and business telephone lines. These numbers are always split into two parts: The area code comes first, and is linked to a specific part of the country. For example, the 020 area code is for London and the 0121 code is for Birmingham.
Telephone dialling codes in the United Kingdom. This is a list of telephone dialling codes in the United Kingdom, which adopts an open telephone numbering plan for its public switched telephone network. The national telephone numbering plan is maintained by Ofcom, an independent regulator and competition authority for the UK ...
Non-geographic telephone numbers in the United Kingdom. A non-geographic number is a type of telephone number that is not linked to any specific locality. Such numbers are an alternative to the traditional 'landline' numbers that are assigned geographically using a system of location-specific area codes.
When calling an international number from a landline phone, the + must be replaced with the international call prefix chosen by the country the call is being made from. Many mobile phones allow the + to be entered directly, by pressing and holding the "0" for GSM phones, or sometimes "*" for CDMA phones.