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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.
Learn about the history and format of the telephone numbering system for twenty-five regions in twenty countries, primarily in North America and the Caribbean. The NANP uses a three-digit area code and a seven-digit local number, with the country code 1.
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 telephone numbers in the United Kingdom, including the country code +44 and the international access code 00. Find out the different formats, prefixes and numbering plans for geographic and non-geographic numbers.
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.
Ten-digit dialing is a telephone dialing procedure in North America that includes the area code of a number when calling. Learn about the history, methods and exceptions of ten-digit dialing in the United States and Canada.
E.164 is an ITU-T standard that defines a general format for international telephone numbers with up to fifteen digits. It includes country codes, global services, networks, groups of countries, and trials categories, and provides guidance on printing and DNS mapping of E.164 numbers.