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Home > UK telephone numbering plan


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The UK telephone numbering plan, also known as the National Numbering Plan, is regulated by the Office of Communications( Ofcom), which replaced the Office of Telecommunications ( Oftel) in 2003.

The telephone service in the United Kingdom was originally provided by local city councils, until in 1912 all except the telephone service of Kingston-upon-Hull, Yorkshire, were bought out by the Post Office. Post Office Telephones also operated telephone services in the Channel Islands ( Jersey and Guernsey), and the Isle of Man, until 1969, when the Islands took over responsibility for their own postal and telephone services.

Post Office Telephones was reorganised in the early 1970s as British Telecommunications ( British Telecom, or BT), and was one of the first nationalised industries to be privatised by the Conservative government in the mid-1980s. The Hull Telephone Department was itself sold by Hull City Council as Kingston Communications in the late 1990s.


1 History

1.1 Introduction of Area Codes

Area codes were first introduced in 1958, allowing a caller to call another telephone direct instead of via a manual telephone exchange, a process known as Subscriber Trunk Dialling (STD), although the process was not completed until 1979. The four-digit codes were originally assigned based on the first three letters of the respective place's name and the corresponding numbers on a telephone keypad. For example Aylesbury was given the STD code 0296, where the letter A can be found on the number 2, the letter Y on the number 9 and the letter L on the number 6. However as more and more places were given STD codes this system became unworkable. The use of alphabetic exchange (area) codes was abandoned in the 1960s.

1.2 Calls to Ireland

Until the late 1980s, calls to Dublin in the Republic of IrelandThe Republic of Ireland ( Irish: Poblacht na hEireann is the common term for a state which covers approximately five-sixths of the island of Ireland, off the coast of northwest Europe. It is the western-most state of the European Union. The remaining sixt were made using the code 0001. This was discontinued, so that all calls to the Republic from the UK had to be dialled in the international format using the international access code (since 1995 00) and country code (353).

However, calls from Northern IrelandNorthern Ireland is the smallest of the Home Nations of the United Kingdom of Great Britain and Northern Ireland. Northern Ireland lies in the north-east of the island of Ireland. It covers 14,139 square kilometres (5,459 square miles), and has a populati to the Republic continue to be charged at UK national or local rates.

1.3 Director System

The Director systemThe Director System was introduced to six cities in the UK with the advent of the automatic telephone exchange. Each city was given a 3 digit code where the second digit corresponded to the first letter of the cities name on the telephone dial, with the e was put in place in six cities, including London, where only a 2 or 3 digit code was used for the city, followed by a 3 digit code, represented by letters, to identify the local exchange. These were

01 London 021 Birmingham 031 Edinburgh 041 Glasgow 051 Liverpool 061 Manchester 091 Newcastle upon Tyne (introduced mid-1980s, also included Durham)

In May 1990Events January January 3 Former leader of Panama Manuel Noriega surrenders to American forces. January 7 The Leaning Tower of Pisa is closed to the public due to safety concerns. January 9 Lt Gen Bazilio Olara Okello The man who led the coup aginst Dr Apo, the growth in demand for phone numbers in LondonLondon is the capital of the United Kingdom and of England, and with over seven million inhabitants in the Greater London area, is the second-most populous conurbation in Europe (after Moscow). From being Londinium the capital of the Roman province of Bri caused the London area,to be split:

071 inner London 081 outer London




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