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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.
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.
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.
A telephone number is a sequence of digits assigned to a device or subscriber for communication via the public switched telephone network or other networks. Learn about the history, formats, and functions of telephone numbers around the world.
Learn how to dial telephone numbers in Australia, including the country code 61 and the area codes for different regions. Find out the format and meaning of landline and mobile numbers, and the access codes for international and emergency calls.
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 format, regulation and allocation of telephone numbers in Germany, including the country code 49. Find out the geographic and non-geographic area codes, the length and prefixes of subscriber numbers, and the international access codes.