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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.
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 ...
This is a listing of lists of country codes: List of ISO country codes (ISO 3166) ITU country code (International Telecommunication Union) List of country calling codes E.164; Mobile country code E.212; Maritime identification digits; List of ITU letter codes (radiocommunication division) UIC country code (International Union of Railways) List ...
Country codes are defined by the ITU-T section of the ITU in standards E.123 and E.164. Country codes constitute the international telephone numbering plan, and are dialed only when calling a telephone number in another country. They are dialed before the national telephone number.
ITU country symbols for non-member states, areas, [2] organizations [3] and special purposes [4] [5] Code Area A ABW Aruba: AIA Anguilla: ALS Alaska (State of) AMS Saint Paul and Amsterdam Islands: AOE / Western Sahara: ASC Ascension Island: ATA Antarctic: AZR Azores: B BER Bermuda: BIO Chagos Islands (Indian Ocean) BLM
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 ...
There are instances of telephone country codes covering points in more than one country; the North American Numbering Plan is one example, as is nominally-sovereign Vatican City's use of Italian numbering. The term overseas call is used by the Bell System to distinguish international calls to another country code from NANP-internal calls.
15 before the local number but after long distance area code for national calls (0 11 15 xxxx-xxxx) and 9 placed after the international access code excluding the 15 for international calls (+54 9 11 xxxx-xxxx).