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Area code 228 is the telephone area code in the North American Numbering Plan (NANP) for the Gulf Coast in the U.S. state of Mississippi, serving the three counties in the state's southeastern tip: Hancock, Harrison, and Jackson.
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.
Initially, area codes with the middle digit 0 were assigned to numbering plan areas that comprised an entire state or province, while jurisdictions with multiple numbering plan areas received area codes having 1 as the second digit. As network growth could not be predicted accurately over more than a few years, this pattern was abandoned by ...
In 1997, the far southeastern tip of the state, including Biloxi and the Gulf Coast, was split off with area code 228. In 1999, area code 662 was created in the northern half of Mississippi, including the Mississippi side of the Memphis area. The 1999 split was intended as a long-term solution, but within five years, 601 was close to exhaustion ...
Area code 605 is the telephone area code in the North American Numbering Plan for the entire U.S. state of South Dakota. The numbering plan area was designated in 1947, when the American Telephone and Telegraph Company (AT&T) devised a comprehensive telephone numbering plan for the United States and Canada.
Region covered by area code 256/938 in Alabama. Area codes 256 and 938 are telephone area codes in the North American Numbering Plan (NANP) for North Alabama, as well as some eastern portions of the state. The two area codes form an overlay plan for the same numbering plan area. Area code 256 was created in 1998, and 938 was added in 2010.
Area code 202 was one of the original North American area codes established in October 1947 by AT&T. After the State of New Jersey with area code 201, the District of Columbia was the second numbering plan area (NPA). Area code 771 was added as a second area code to the numbering plan area in April 2021 to create an all-services overlay complex.
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)