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Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union. Original North American area codes; List of North American Numbering Plan area codes; Telephone numbers in Mexico; Telephone numbers in Greenland
List of Nebraska area codes; List of Nevada area codes; List of New Hampshire area codes; List of New Jersey area codes; List of New Mexico area codes; List of New York area codes; List of North Carolina area codes; List of North Dakota area codes
This includes all area codes that can also be found in the subcategories. This category lists the telephone area codes in the United States . Area codes in the North American Numbering Plan area may not contain 0 or 1 as the first digit.
After the remaining valid area codes were used up by expansion, in 1995 the rapid increase in the need for more area codes forced the NANPA to allow the digits 2 through 8 to be used as a middle digit in new area code assignments, with 9 being reserved as a last resort for potential future expansion. At the same time, local exchanges were ...
N11 code; North American Numbering Council; List of North American Numbering Plan area codes; North American Numbering Plan expansion; Telephone number pooling; Numbering Resource Utilization/Forecast Report
A phone number communicates a lot --and if you dig a little deep, an area code contains information about the economic situation of its residents, too. Richest and poorest area codes in the US ...
Each NPA was identified by a three-digit area code used as a prefix to each local telephone number. The United States received seventy-seven area codes, and Canada nine. The initial system of numbering plan areas and area codes was expanded rapidly during the ensuing decades, and established the North American Numbering Plan (NANP).