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  2. List of telephone country codes - Wikipedia

    en.wikipedia.org/.../List_of_telephone_country_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Telephone country codes, but also sometimes referred to as country dial-in codes, or historically international subscriber dialing (ISD) codes in the U.K., are telephone number dialing prefixes for reaching subscribers in foreign countries or areas via international telecommunication networks.

  3. List of international call prefixes - Wikipedia

    en.wikipedia.org/wiki/List_of_international_call...

    This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, the symbol + before the country code may be used irrespective of where the telephone is used at that moment; the network operator ...

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

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

    This is a list of telephone dialling codes in the United Kingdom and the Crown Dependencies, ... International call prefix: 01 ... 04025 was South Ockendon, ...

  5. National conventions for writing telephone numbers - Wikipedia

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

    Area code dialing is optional in most geographical area codes, except Moscow (area codes 495, 498, 499); it is mandatory for non-geographical area codes. E.123 international and Microsoft formats are used for writing local phone numbers as well; international prefix and country code 7 are replaced with trunk code 8 (or 8~CC ) when dialing a ...

  6. Telephone numbers in Africa - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Africa

    South Africa +27: 00: Telephone numbers in South Africa Eswatini +268: 00: Telephone numbers in Swaziland Zambia +260: 00: Telephone numbers in Zambia Zimbabwe +263: 00: Telephone numbers in Zimbabwe: West Africa Ascension Island (United Kingdom) +247: 00: Telephone numbers in Ascension Island Benin +229: 00: Telephone numbers in Benin Burkina ...

  7. Telephone numbers in the United Kingdom - Wikipedia

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

    This leads to a restriction as to which initial digits can be used for subscriber numbers within those four-digit area codes, e.g. in the 01387 four-digit area code, subscriber numbers cannot begin with a 3 because 013873 is a separate five-digit area code; likewise in the 01946 four-digit area code, subscriber numbers cannot begin with a 7 ...

  8. National Number Group - Wikipedia

    en.wikipedia.org/wiki/National_Number_Group

    The UK Public Switched Telephone Network is divided up by area into National Number Groups (NNG's), and then further divided up into dialling codes.. The structure of UK telephone numbers is a leading zero (replaced with +44 for international calls from outside the UK) followed by the NNG — a 2, 3, 4 or 5 digit dialling code (digits SA in the example below) to different geographic areas of ...

  9. Area code 021 - Wikipedia

    en.wikipedia.org/wiki/Area_code_021

    in Pakistan, the telephone area code for the city of Karachi. in Serbia, the area code for the city of Novi Sad. see Telephone numbers in South Africa. in Sweden, the area code for the city of Västerås; see Telephone numbers in Sweden. in the United Kingdom, the former area code for Birmingham England (changed to 0121 on 16 April 1995