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Learn about the structure, format and history of UK telephone numbers, including the country code 44 and the dialling codes for different regions and services. Find out how to call the UK from abroad and how to use the National Telephone Numbering Plan.
Find the telephone dialling codes for different areas and services in the United Kingdom, based on the official standard maintained by Ofcom. Learn the history and changes of the UK phone code system, from the international prefix 00 to the area codes 01, 02, and 03.
Learn how UK telephone numbers evolved from manual to automatic exchanges, from local codes to area codes, and from geographic to special services. The web page covers the origins, subscriber numbers, director system, and renumbering exercises of UK telephone numbers.
Learn about the history, types, and publication of telephone directories, also known as phone books, white and yellow pages, or the white and yellow pages. Find out how they list subscribers by name, address, and number, and how they evolved from paper to online formats.
Learn about the different types of non-geographic numbers in the UK, such as 0808, 03, 084, 087 and 09. Find out how they work, how they are charged and how to call them from abroad.
Learn about the history and usage of telephone exchange names or central office names, which were assigned to switching systems in different localities. Find out how they were dialed, displayed, and replaced by numeric systems in various countries.
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