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The Bureau of Transportation Statistics (BTS), as part of the United States Department of Transportation (US DOT), maintains a list of U.S. state and country codes, [1] named World Area Codes (WAC). (U.S.) State and (world) country codes
The nine world zones are generally defined geographically, with exceptions for political and historical alignment. Zone 1 uses closed numbering plan, identified by the digit 1 as country code. An area code of three digits dialed after the country code determines the area served in the United States and its territories, Canada, and much of the ...
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.
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 second area code, 202, was assigned to the District of Columbia. The allocation of area codes was readjusted as early as 1948 before the implementation of the plan commenced. For example, the Indiana numbering plan area 317 was divided, which essentially provided a larger numbering pool in the Indiana suburbs of Chicago (area code 219).
To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.