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  2. National Cyber Security Centre (United Kingdom) - Wikipedia

    en.wikipedia.org/wiki/National_Cyber_Security...

    The National Cyber Security Centre (NCSC) is an organisation of the United Kingdom Government that provides advice and support for the public and private sector in how to avoid computer security threats. It is the UK's National technical authority for cyber threats and Information Assurance.

  3. Telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_the...

    In the United Kingdom, telephone numbers are administered by the Office of Communications . 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.

  4. List of dialling codes in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/List_of_dialling_codes_in...

    "Regular Expressions for Validating and Formatting GB Telephone Numbers". aa-asterisk.org.uk. Archived from the original on 6 April 2014 – patterns for checking which area codes and prefixes are valid and patterns for formatting each number type, archived in 2014 "The first 25 years of UK STD code changes summarised" (PDF). Sam Hallas.

  5. List of telephone exchanges in London - Wikipedia

    en.wikipedia.org/wiki/List_of_telephone...

    Telephones on automatic exchanges had letters as well as numbers marked on the telephone dial, and calls to London numbers used the first three letters of the exchange name followed by four digits, e.g. EUS 1234. [2] The number could be dialled as 387-1234 or spoken to a manual exchange operator as Euston 1234.

  6. Telecommunications in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_in_the...

    Telecommunications in the United Kingdom have evolved from the early days of the telegraph to modern fibre broadband and high-speed 5G networks. History Company logo on porch of 17 & 19 Newhall Street, Birmingham (former Central exchange) National Telephone Company (NTC) was a British telephone company from 1881 until 1911, which brought together smaller local companies in the early years of ...

  7. History of telephone numbers in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/History_of_telephone...

    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 ...

  8. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    There is an international format for recording a telephone number containing the country code, settlement code and telephone number, and the national format containing the settlement code and telephone number. To record Ukrainian telephone numbers, telephone codes for settlements do not have an initial zero, long-distance prefix: 0.

  9. Non-geographic telephone numbers in the United Kingdom

    en.wikipedia.org/wiki/Non-geographic_telephone...

    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 ...