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Created conflicts in area code regions that allowed seven-digit dialling and had been using numbers beginning in 988; a total of 82 area codes switched to ten-digit dialling as a result. [24] 989: Michigan (Alpena, Mt. Pleasant, Bay City, Saginaw, Midland, Owosso, and a part of central Michigan) April 7, 2001: split of 517; 990–999
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] As of July 2023, California has 38 active area codes. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra ...
Area codes 714 and 657. Coordinates: 33.8°N 117.9°W. Numbering plan areas in California (blue) and border states. Area codes 657 and 714 are shown in red. Area codes 714 and 657 are telephone area codes in the North American Numbering Plan for the southern part of the U.S. state of California. The numbering plan area comprises northern Orange ...
Area code 707 is shown in red. Area codes 707 and 369 are telephone area codes in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. The area codes serve part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area codes include Napa, Sebastopol, Vallejo ...
The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators.
Area codes 442 and 760 are shown in red. Area codes 760 and 442 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. These area codes serve an overlay complex that comprises much of the southeastern and southernmost portions of California. It includes Imperial, Inyo, and Mono counties, as well ...
This is a list of future area codes in the North American Numbering Plan (NANP) that are in the planning stages for relief of central office code exhaustion in the given numbering plan areas (NPAs). The dates are subject to change during implementation as published in the official NANP Administrator Planning Letters.
Numbering plan areas and area codes of Texas (tan). This is a list of area codes in the U.S. state of Texas. The date of establishment of each area code is indicated in parentheses: [1] 210: San Antonio area; overlays with 726 (November 1, 1992) 214: Dallas area, overlays with 469, 972, and 945 (October 1947)