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Ten-digit dialing. Ten-digit dialing is a telephone dialing procedure in the countries and territories that are members of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when dialing to initiate a telephone call. When necessary, the ten-digit number may be prefixed with the trunk ...
457. Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025[3] will overlay area code 318 by 2026. previously a fictitious area code assigned to identify Naked DSL / Dry Loop and dedicated data lines in Saskatchewan.
Using 0 or 1 as the first digit of an area code or central office code is invalid, as is a 9 as the middle digit of an area code; these are trunk prefixes or reserved for North American Numbering Plan expansion. For example, 234 235-5678 is a valid telephone number; with area code 234, central office prefix (exchange) 235, and line number 5678.
Therefore, numbering plan area codes, often termed just area codes, were defined to have three digits, with the middle digit being 0 or 1. 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 ...
Area code 541 was created in an area code split from area code 503 on November 5, 1995. ... resulting in mandatory 10-digit dialing for that area. [3] ...
In 2020, 988 was designated as a nationwide three-digit dialing code for the National Suicide Prevention Lifeline. This created a conflict for Hawaii's exchanges, all of which permitted seven-digit dialing. Therefore, area code 808 transitioned to ten-digit dialing on October 24, 2021. [2]
Area code 603. Area code 603 in a 1956 map, covering the . Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947. In 2011, area code 603 was said to be nearing exhaustion and a second area code for New ...
Area codes 904 and 324 are telephone area codes in the North American Numbering Plan for most of the First Coast (northeast) region of the U.S. state of Florida. The numbering plan area comprises most of the metropolitan area of Jacksonville. It includes all of Duval County, St. Johns County, Nassau County, and Baker County, and almost all of ...