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East Haven, CT is currently assigned two area codes 203 and 475. East Haven, CT utilizes an area code overlay
in which area codes 203 and 475 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary in East Haven because two different homes in the same geographic area can have
the same seven digit phone number but each would have a different area code. The area code overlay which is in use in East Haven, CT today was put into service on December 12, 2009. Area code 203 originally
covered the entire state of Connecticut, including East Haven, when it was established in 1947.
In addition to East Haven, CT area codes 203 and 475 serve the major communities of Bridgeport,
Danbury, Meriden, Milford, Naugatuck, New Haven, Norwalk, Shelton, Stamford, Trumbull, Waterbury, West Haven and Westport. |
