Area Code Details for: 203

Location

State

Connecticut

Country

Map

Details

State	Connecticut (CT)
Time Zone
Parent NPA	-
Relief Planning in ProgressArea code relief planning is the process of addressing the exhaustion of available telephone numbers within an area code. When the supply of numbers in an existing area code is running low, NANPA works with the telecommunications industry to introduce new area codes.	No
In Service Date	January 1, 1947

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Cities

Zipcode	City	County
06540	New Haven, CT	New Haven
06601	Bridgeport, CT	Fairfield
06537	New Haven, CT	New Haven
06538	New Haven, CT	New Haven
06602	Bridgeport, CT	Fairfield
06606	Bridgeport, CT	Fairfield
06607	Bridgeport, CT	Fairfield
06604	Bridgeport, CT	Fairfield
06605	Bridgeport, CT	Fairfield
06536	New Haven, CT	New Haven
06525	Woodbridge, CT	New Haven
06530	New Haven, CT	New Haven
06521	New Haven, CT	New Haven
06524	Bethany, CT	New Haven
06531	New Haven, CT	New Haven
06534	New Haven, CT	New Haven
06535	New Haven, CT	New Haven
06532	New Haven, CT	New Haven
06533	New Haven, CT	New Haven
06608	Bridgeport, CT	Fairfield
06507	New Haven, CT	New Haven
06508	New Haven, CT	New Haven
06505	New Haven, CT	New Haven
06506	New Haven, CT	New Haven
06509	New Haven, CT	New Haven
06615	Stratford, CT	Fairfield
06673	Bridgeport, CT	Fairfield
06510	New Haven, CT	New Haven
06614	Stratford, CT	Fairfield
06504	New Haven, CT	New Haven
06612	Easton, CT	Fairfield
06493	Wallingford, CT	New Haven
06610	Bridgeport, CT	Fairfield
06611	Trumbull, CT	Fairfield
06494	Wallingford, CT	New Haven
06502	New Haven, CT	New Haven
06503	New Haven, CT	New Haven
06495	Wallingford, CT	New Haven
06501	New Haven, CT	New Haven
06418	Derby, CT	New Haven
06437	Guilford, CT	New Haven
06410	Cheshire, CT	New Haven
06411	Cheshire, CT	New Haven
06440	Hawleyville, CT	Fairfield
06451	Meriden, CT	New Haven
06460	Milford, CT	New Haven
06443	Madison, CT	New Haven
06450	Meriden, CT	New Haven
06515	New Haven, CT	New Haven
06514	Hamden, CT	New Haven
06401	Ansonia, CT	New Haven
06512	East Haven, CT	New Haven
06513	New Haven, CT	New Haven
06403	Beacon Falls, CT	New Haven
06405	Branford, CT	New Haven
06408	Cheshire, CT	New Haven
06511	New Haven, CT	New Haven
06404	Botsford, CT	Fairfield
06461	Milford, CT	New Haven
06491	Stevenson, CT	Fairfield
06492	Wallingford, CT	New Haven
06487	South Britain, CT	New Haven
06488	Southbury, CT	New Haven
06516	West Haven, CT	New Haven
06519	New Haven, CT	New Haven
06520	New Haven, CT	New Haven
06517	Hamden, CT	New Haven
06518	Hamden, CT	New Haven
06484	Shelton, CT	Fairfield
06471	North Branford, CT	New Haven
06472	Northford, CT	New Haven
06468	Monroe, CT	Fairfield
06470	Newtown, CT	Fairfield
06473	North Haven, CT	New Haven
06482	Sandy Hook, CT	Fairfield
06483	Seymour, CT	New Haven
06477	Orange, CT	New Haven
06478	Oxford, CT	New Haven
06699	Bridgeport, CT	Fairfield
06875	Redding Center, CT	Fairfield
06876	Redding Ridge, CT	Fairfield
06870	Old Greenwich, CT	Fairfield
06858	Norwalk, CT	Fairfield
06860	Norwalk, CT	Fairfield
06880	Westport, CT	Fairfield
06881	Westport, CT	Fairfield
06879	Ridgefield, CT	Fairfield
06877	Ridgefield, CT	Fairfield
06878	Riverside, CT	Fairfield
06851	Norwalk, CT	Fairfield
06852	Norwalk, CT	Fairfield
06850	Norwalk, CT	Fairfield
06838	Greens Farms, CT	Fairfield
06840	New Canaan, CT	Fairfield
06856	Norwalk, CT	Fairfield
06857	Norwalk, CT	Fairfield
06855	Norwalk, CT	Fairfield
06853	Norwalk, CT	Fairfield
06854	Norwalk, CT	Fairfield
06910	Stamford, CT	Fairfield
06911	Stamford, CT	Fairfield
06907	Stamford, CT	Fairfield
06905	Stamford, CT	Fairfield
06906	Stamford, CT	Fairfield
06926	Stamford, CT	Fairfield
06927	Stamford, CT	Fairfield
06914	Stamford, CT	Fairfield
06912	Stamford, CT	Fairfield
06913	Stamford, CT	Fairfield
06890	Southport, CT	Fairfield
06896	Redding, CT	Fairfield
06889	Westport, CT	Fairfield
06883	Weston, CT	Fairfield
06888	Westport, CT	Fairfield
06903	Stamford, CT	Fairfield
06904	Stamford, CT	Fairfield
06902	Stamford, CT	Fairfield
06897	Wilton, CT	Fairfield
06901	Stamford, CT	Fairfield
06722	Waterbury, CT	New Haven
06723	Waterbury, CT	New Haven
06720	Waterbury, CT	New Haven
06721	Waterbury, CT	New Haven
06724	Waterbury, CT	New Haven
06751	Bethlehem, CT	Litchfield
06762	Middlebury, CT	New Haven
06725	Waterbury, CT	New Haven
06726	Waterbury, CT	New Haven
06716	Wolcott, CT	New Haven
06703	Waterbury, CT	New Haven
06704	Waterbury, CT	New Haven
06701	Waterbury, CT	New Haven
06702	Waterbury, CT	New Haven
06705	Waterbury, CT	New Haven
06710	Waterbury, CT	New Haven
06712	Prospect, CT	New Haven
06706	Waterbury, CT	New Haven
06708	Waterbury, CT	New Haven
06824	Fairfield, CT	Fairfield
06825	Fairfield, CT	Fairfield
06813	Danbury, CT	Fairfield
06820	Darien, CT	Fairfield
06828	Fairfield, CT	Fairfield
06831	Greenwich, CT	Fairfield
06830	Greenwich, CT	Fairfield
06829	Georgetown, CT	Fairfield
06836	Greenwich, CT	Fairfield
06812	New Fairfield, CT	Fairfield
06784	Sherman, CT	Fairfield
06798	Woodbury, CT	Litchfield
06770	Naugatuck, CT	New Haven
06783	Roxbury, CT	Litchfield
06801	Bethel, CT	Fairfield
06807	Cos Cob, CT	Fairfield
06811	Danbury, CT	Fairfield
06804	Brookfield, CT	Fairfield
06810	Danbury, CT	Fairfield

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