Area code 203 is used for the following cities:
Click on any city to see time zone and surise sunset time.
- Germany - North Rhine-Westphalia - Duisburg (+49-203)
- USA - Connecticut - Ansonia (+1-203)
- USA - Connecticut - Beacon Falls (+1-203)
- USA - Connecticut - Bethany (+1-203)
- USA - Connecticut - Bethel (+1-203)
- USA - Connecticut - Bethlehem (+1-203)
- USA - Connecticut - Branford (+1-203)
- USA - Connecticut - Bridgeport (+1-203)
- USA - Connecticut - Brookfield (+1-203)
- USA - Connecticut - Cheshire (+1-203)
- USA - Connecticut - Danbury (+1-203)
- USA - Connecticut - Darien (+1-203)
- USA - Connecticut - Derby (+1-203)
- USA - Connecticut - East Haven (+1-203)
- USA - Connecticut - Easton (+1-203)
- USA - Connecticut - Fairfield (+1-203)
- USA - Connecticut - Greenwich (+1-203)
- USA - Connecticut - Guilford (+1-203)
- USA - Connecticut - Hamden (+1-203)
- USA - Connecticut - Madison (+1-203)
- USA - Connecticut - Meriden (+1-203)
- USA - Connecticut - Middlebury (+1-203)
- USA - Connecticut - Milford (+1-203)
- USA - Connecticut - Monroe (+1-203)
- USA - Connecticut - Naugatuck (+1-203)
- USA - Connecticut - New Canaan (+1-203)
- USA - Connecticut - New Fairfield (+1-203)
- USA - Connecticut - New Haven (+1-203)
- USA - Connecticut - Newtown (+1-203)
- USA - Connecticut - North Branford (+1-203)
- USA - Connecticut - North Haven (+1-203)
- USA - Connecticut - Norwalk (+1-203)
- USA - Connecticut - Orange (+1-203)
- USA - Connecticut - Oxford (+1-203)
- USA - Connecticut - Prospect (+1-203)
- USA - Connecticut - Redding (+1-203)
- USA - Connecticut - Ridgefield (+1-203)
- USA - Connecticut - Seymour (+1-203)
- USA - Connecticut - Shelton (+1-203)
- USA - Connecticut - Southbury (+1-203)
- USA - Connecticut - Stamford (+1-203)
- USA - Connecticut - Stratford (+1-203)
- USA - Connecticut - Trumbull (+1-203)
- USA - Connecticut - Wallingford (+1-203)
- USA - Connecticut - Waterbury (+1-203)
- USA - Connecticut - West Haven (+1-203)
- USA - Connecticut - Weston (+1-203)
- USA - Connecticut - Westport (+1-203)
- USA - Connecticut - Wilton (+1-203)
- USA - Connecticut - Wolcott (+1-203)
- USA - Connecticut - Woodbridge (+1-203)
- USA - Connecticut - Woodbury (+1-203)