Area codes 203 and 475
Area codes for southwestern Connecticut
Area codes 203 and 475
Area codes 203 and 475 are telephone area codes in the North American Numbering Plan (NANP) for the southwestern part of the U.S. state of Connecticut. The numbering plan area (NPA) is mostly coextensive with the Connecticut portion of the New York metropolitan area, and comprises most of Fairfield County, all of New Haven County, and a small portion of Litchfield County.
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