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This is a list of telephone dialling codes in the United Kingdom and the Crown Dependencies, 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 communications industries. This list is ...
When dialling a UK number from abroad the zero is omitted and replaced by the calling country's international call prefix followed by 44, the country code for the UK. Thus a call to the Euston exchange discussed above from the United States would be to 011 (US international prefix) 44 20 (London) 73871234.
Worldwide distribution of country calling codes. Regions are coloured by first digit. Telephone country codes, but also sometimes referred to as country dial-in codes, or historically international subscriber dialing (ISD) codes in the U.K., are telephone number dialing prefixes for reaching subscribers in foreign countries or areas via international telecommunication networks.
The code allocated to the largest population is for London. The code allocated to the largest area is (028) for all of Northern Ireland. The UK Numbering Plan also applies to three British Crown dependencies – Guernsey, Jersey, and the Isle of Man – even though they are not part of the UK, these countries are closely related.
Under all-number calling, a numbering plan introduced around 1960, local calls within an area code were placed by dialing NXX-XXXX, omitting the area code, known as seven-digit dialing. Only calling a destination in a different area code required dialing the destination area code, known as ten-digit dialing. Due to the need for a larger ...
This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, the symbol + before the country code may be used irrespective of where the telephone is used at that moment; the network operator ...
Some special services have special short codes (e.g., 119, 911, 100, 101, 102, 000, 999, 111, and 112 being the emergency telephone numbers in many countries). The dialing procedures (dialing plan) in some areas permit dialing numbers in the local calling area without using an area code or city code prefix. For example, a telephone number in ...
The dialing rules may include variable-length dialing for area code, trunk access and international access prefixes, central office/service access numbers, and calling cards tone numbers. [ 2 ] [ 3 ] With this approach, phone numbers stored in the phone book remain unchanged when the user moves to a different geographical location or selects a ...