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Area code 203 is a North American telephone area code that covers the southwestern part of Connecticut, and is overlaid with area code 475. The area codes stretch from Connecticut's western border, along its southern coast, to Madison, and north to Meriden. (The rest of Connecticut is served by the 860 area code, which will be overlain with 959 at an undisclosed date.) The region encompassed by 203 and 475 roughly corresponds to the Connecticut side of the New York metropolitan area. Prior to August 28, 1995 (when the split with 860 took effect), area code 203 encompassed all of Connecticut.
Counties served by 203/475:
Cities and towns served by 203/475:
The city of Meriden is notable as the only place in Connecticut where one can call towns in either the Hartford or New Haven exchanges toll-free from a home (landline) phone.
The Connecticut Department of Public Utility Control, in August 1999, proposed an area code overlay for the 203 area code. Area code 475 went into effect on December 12, 2009. Even though area code 475 overlays only 203, all callers in Connecticut (including those in area code 860) had to dial all calls with ten digits, effective November 14, 2009; this is because when needed, an overlay of area code 959 on area code 860 will be implemented.
The first range of available numbers made available in Connecticut's third area code was (475) 882-4xxx, in the Huntington section of Shelton.
|Connecticut area codes: 203, 475, 860|
|North: 860, 959|
|West: 914, 845||area codes 203 and 475||East: 860, 959|
|South: 516, 631|
|New York area codes: 212, 315, 347, 516, 518, 585, 607, 631, 646, 716, 718, 845, 914, 917, 929|