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Area code 603 in a 1956 map, covering the whole state.. 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.
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes. In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes.
California's 40th area code; 838: New York (Albany, Schenectady, Plattsburgh, Saranac Lake, Lake George, Westport, and most of northeastern New York) September 19, 2017: overlaid on 518; 839: South Carolina (Columbia, Rock Hill, Sumter, Aiken, and most of central South Carolina) May 26, 2020: overlaid on 803 [19] 840
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes.
Oct. 31—CONCORD — Facing a need for another as soon as 2027, state officials are mobilizing to keep 603 as New Hampshire's only area code while warning of the disruptions a second area code ...
The current area code is “in high demand” and is expected to be depleted by September 2025. An overlay “adds a second area code to the same geographic region.”
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 ...
If this map is the primary area code map of California (master map), no area code appears in red. Map is correct as of 2023-07-02. To make changes, updates, and replacing the lesser maps (the ones for a specific area code block), this file uses CSS to define the colors for each region.