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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; Mobile country code E.212; Maritime identification digits; List of ITU letter codes (radiocommunication division) UIC country code (International Union of Railways) List ...
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 ...
All telephone numbers in Djibouti have eight digits. Fixed line numbers start with 21 or 27, then a fixed line locality code, followed by four digits. Mobile numbers start with 77, then a mobile line locality code, followed by four digits. With the country code of Djibouti (253), the international format is "+253 XX YY ZZZZ".
877 numbers are toll-free numbers often used by businesses and organizations. They are generally considered reputable and legitimate. Caitlyn Moorhead and Cynthia Measom contributed to the ...
400-toll-free numbers in China are ten-digit numbers beginning with "400". 400-toll-free numbers can be accessed by all fixed-line and mobile phones. Callers have to bear local access charges from their service providers.
In many countries, dialing either 112 (used in Europe and parts of Asia) or 911 (used mostly in the Americas) will connect callers to the local emergency services. However, not all countries use those emergency telephone numbers. The emergency numbers in the world (but not necessarily all of them) are listed below.
When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.