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Learn about the format, prefixes, and area codes of Canadian telephone numbers, as well as the history and regulation of the North American Numbering Plan. The country code for Canada is 1, which is used for international access and trunk prefix.
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.
The North American Numbering Plan (NANP) is a telephone numbering system for twenty-five regions in twenty countries, mainly in North America and the Caribbean. It uses the country code 1 and divides the territories into numbering plan areas (NPAs) with three-digit area codes.
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.
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 about the history and usage of telephone exchange names or central office names, which were assigned to switching systems in different localities. Find out how they were dialed, displayed, and replaced by numeric systems in various countries.
The implementation and expansion of the North American Numbering Plan between 1947 and 1992 preserved a long-standing practice in the United States and Canada that callers should only need to dial the local seven-digit telephone number when placing a call within the caller's exchange area or within the home numbering plan area (NPA).
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.