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  1. 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.

  2. 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.

  3. 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 ...

  4. From the introduction of the telephone in the late 1870s, 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'.

  5. 19 lug 2023 · How Were Phone Numbers Developed? Before diving into the specifics of 020 numbers, it is essential to understand the broader context of phone number development. The concept of assigning numerical identifiers to telephone lines dates back to the late 19th century.

  6. Telephone numbers in the United Kingdom have a flexible structure that reflects their historical demands, starting from many independent companies through a nationalised near-monopoly, to a system that supports many different services, including cellular phones, which were not envisaged when the system was first built.

  7. The world's first central telegraph station was opened by the Electric Telegraph Company in Founders' Court, Lothbury in the City of London. 1850. The first telegraph cable was laid between England and France, this was also the first telegraph cable laid in the open sea and was laid by H.M. Tug 'Goliath' accompanied by H. M. Packet 'Widgeon'.