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- 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.
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List of area codes. 229 – Albany, Thomasville, Valdosta, Tifton, Cairo Georgia, Fitzgerald and Americus (southwest Georgia) 404 – Atlanta and immediate environs (central Fulton and DeKalb counties) 470 – Atlanta and its suburbs, overlay area code that covers same area as 678, 770, and 943.
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.
PrefixLocationCountyIntroduced200August 16, 2011203May 14, 2003204October 13, 1999205July 22, 19991993: split to create 905. 2001: overlaid by 647. 2013: overlaid by 437. 2025: overlaid by 942. area code 387 is reserved as a fifth code for the region. 417. Missouri ( Springfield, Joplin, Branson, Lamar, Lebanon, and most of southwestern Missouri) 1950. created from parts of the area codes 314 and 816.
CodeTerritory Or UseDate200not in use; available for non-geographic ...easily recognizable code (ERC)New Jersey ( Bergen County and Hudson ...19471947Southwestern Connecticut ( Bridgeport, ...1947List of North American Numbering Plan area codes. This is a list of North American telephone area codes in effect for the North American Numbering Plan (NANP). The area to which an area code is officially assigned is known as a Numbering Plan Area (NPA).
On January 1st, 1947 it went into service. 603 is a General Purpose Code. Dialing pattern for local calls within the same NPA (area code) is 7D. ZIP Codes Served By 603 Area Code. 3857. 3102. 3104. 3101. 3064. 3063. 3060. 3801. 3768. 3431. 3109. 3103. 3079. 3038. 3579. 3570. 3222. 3303. 3301. 3062. 3251. 3897. 3259. 3576. 3264. 3470. 3465. 3785.
NxxCityUsageCompany Name200NewmarketLandlineComcast Phone Of New Hampshire, Llc - Nh203ManchesterWirelessNew Cingular Wireless Pcs, Llc - Dc204NashuaWirelessUnited States Cellular Corp. - New ...205PortsmouthWirelessOmnipoint Miami E License, Llc- New Hampshire
- Eastern (GMT -05:00)
May 1, 2024 · 603 Area Code located in New Hampshire, including 163 cities, 10 counties, 1 time zone, map, Census demographics, and 726 active prefixes.
Georgia currently utilizes 10 area codes. When first established by AT&T and the Bell System in 1947, 404 covered the entire state of Georgia. The most recently added was 943 in 2022 as an overlay to 770 and 404. Today, 770 is the most populated with an estimated 4.7 million of the state's 9.7 million residents. Search by Phone:
