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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 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
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 ...
Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this 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
International calls require at least one additional prefix to be dialing before the country code, to connect the call to international circuits, the international call prefix. When printing telephone numbers this is indicated by a plus-sign ( + ) in front of a complete international telephone number, per recommendation E164 by the ITU.
The number is presented starting the country calling code. This is called the globalized format of an E.164 number, and is defined in the Internet Engineering Task Force RFC 2806. [6] The international calling prefix is a trunk code to reach an international circuit in the country of call origination. [7]
The sortable table below contains the three sets of ISO 3166-1 country codes for each of its 249 countries, links to the ISO 3166-2 country subdivision codes, and the Internet country code top-level domains (ccTLD) which are based on the ISO 3166-1 alpha-2 standard with the few exceptions noted. See the ISO 3166-3 standard for former country codes.