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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 is expected to be overlaid with 959 on August 30, 2014.) 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:〔http://phones.whitepages.com/203?page=1〕 :Fairfield (except the Town of Sherman), New Haven, and Litchfield (the towns of Woodbury, Bethlehem, and a small part of Roxbury). Cities and towns served by 203/475:〔 :Ansonia, Beacon Falls, Bethany, Bethel, Bethlehem, 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 Branford, North Haven, Norwalk, Orange, Oxford, Prospect, Redding, Ridgefield, a small part of Roxbury, Seymour, Shelton, Southbury, Stamford, Stratford, Trumbull, Wallingford, Waterbury, West Haven, Weston, Westport, Wilton, Wolcott, Woodbridge, Woodbury 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. == Area code overlay == The (Connecticut Department of Public Utility Control ), in August 1999, proposed an area code overlay for the 203 area code.〔(''Regulators Have Area Code Plan'' ) Hartford Courant, August 1999〕 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;〔(''Planning Letter 388'' ) NANPA, Apr 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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「area codes 203 and 475」の詳細全文を読む スポンサード リンク
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