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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 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.
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 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.
Learn how to dial international phone numbers from Australia and other countries using different prefixes. Find out the meaning of 011, 0011, 000, and other codes in the list of international call prefixes.
Learn about the types, structures and formats of telephone numbers in different regions and networks. The International Telecommunication Union (ITU) has established a comprehensive numbering plan, E.164, for uniform interoperability of the networks of its member states or regional administrations.
E.123 is a standard by the ITU-T that provides guidelines for the presentation of telephone numbers, email addresses, and web addresses. It includes the international prefix symbol (+), the country code, and the local number, as well as other rules and formats.
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