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In the United Kingdom, telephone numbers are administered by the Office of Communications ( Ofcom ). For this purpose, Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations. Telephone numbers are of variable length.
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 communications ...
From the introduction of the telephone in the late 1870s, [ 5] to the early 1990s, telephone numbers in most of the United Kingdom were usually shown with a written exchange name followed by the subscriber number, e.g. 'Mallaig 10' or 'Aberdeen 43342'. This allowed calls to be placed initially through the operator and later by using local or ...
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. Non-geographic numbers are used for various reasons, from providing flexible routing of incoming ...
Telephone directory. A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a ...
Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.
In the UK, there were 35 million (2002) mainline telephones. The telephone service in the United Kingdom was originally provided by private companies and local city councils, but by 1912–13 [ 14] all except the telephone service of Kingston upon Hull, Yorkshire and Guernsey had been bought out by the General Post Office.
999 is the official emergency number for the United Kingdom, but calls are also accepted on the European Union emergency number, 112. All calls are answered by 999 operators, and are always free. [ 2] Approximately 35 million 999/112 calls are made in the UK each year, with 74% from mobiles and 26% from landlines in 2022.