203 Area Code belongs to the Connecticut (CT) State.
Other cities in the 203 Area Code.
Ansonia, Bethel, Branford, Bridgeport, Brookfield, Cheshire, Danbury, Darien, Derby, East Haven, Easton, Fairfield, Greenwich, Guilford, Hamden, Madison, Meriden, Middlebury, Milford, Monroe, Naugatuck, New Canaan, New Fairfield, New Haven, Newtown, North Haven, Norwalk, Orange, Oxford, Prospect, Redding, Ridgefield, Seymour, Shelton, Southbury, Stamford, Stratford, Trumbull, Wallingford, Waterbury, West Haven, Weston, Westport, Wilton, Wolcott, Woodbridge, Woodbury
Connecticut (CT)
also shares with these area codes: