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Learn about the telephone number prefixes for reaching foreign countries or areas via international telecommunication networks. Find out the country code for Niger (227) and other countries in different world zones.
Learn how telephone numbers are written and dialed in different countries and regions, according to the ITU recommendation E.123. Compare the formats, lengths, prefixes and codes of landline, mobile, toll free and service numbers.
Find the mobile prefixes for different countries and territories, including Afghanistan, Åland, Algeria, American Samoa, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Aruba, Ascension Island, Australia, Austria, etc. The web page also shows the international calling codes, the size of NN (NSN), and the carriers for each prefix.
Learn how to dial international phone numbers from Australia and other countries using different prefixes. Find out the meaning of 0011, 000, 009 and other codes, and see the list of historic and current prefixes.
Learn how to dial phone numbers in Colombia, including the country code +57, the international access code 00, and the dialing zones for landlines and mobiles. Find out the history, the emergency numbers, and the toll-free and other services of Colombian telecommunications.
Learn about the history and features of toll-free numbers, which are billed for all arriving calls and identified by a dialing prefix. Find out how to get a toll-free number in different countries and regions, such as 0800 in the UK.
Learn about the history, assignment, and operation of toll-free telephone numbers in the North American Numbering Plan, which have the area code prefixes 800, 833, 844, 855, 866, 877, and 888. Find out how to call or get a toll-free number in the U.S. or Canada, and what are the special cases and restrictions.
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