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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.
The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state, respectively. [ 1 ] In 1950, the boundaries of the numbering plan area were redrawn to produce a division of the northern and central parts along a north–south ...
Map of all Tennessee area codes. 423 - Chattanooga, Johnson City, Kingsport, Bristol: Initially split from 615 in 1995. 615 and 629 (overlay) - Greater Nashville, including Murfreesboro, Mount Juliet: 615 initially split from 901 in a 1954 flash-cut. The 629 overlay for the entire area code was made effective in 2015
The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union.
This is a list of future area codes in the North American Numbering ... California: 2025 – 3rd Qtr March 26, 2025 [6 ... Tennessee: 2025 – 3rd Qtr March 5, 2025 ...
Tennessee Public Utility Commission approved a new 729 area code for the existing 423 region in eastern Tennessee. The change goes into effect Aug. 5. If you have a 423 number, don't worry.
Area codes in California (25 P) ... Area codes in New York (state) (22 P) Area codes in North Carolina (7 P) ... Area codes in Tennessee (7 P)
The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state, respectively. [1] California area codes were reorganized geographically in 1950, so that 916 was assigned to a numbering plan area that comprised only the ...