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Area codes 203 and 475

From Wikipedia, the free encyclopedia

Connecticut state map with numbering plan area 203/475 highlighted.
Connecticut state map with numbering plan area 203/475 highlighted.

Area code 203 is a North American telephone area code that is assigned to the southwestern part of Connecticut, and is overlaid with area code 475. The numbering plan area (NPA) 203 originally covered the entire state of Connecticut when the North American Numbering Plan was created in 1947. Today the numbering plan area stretches from Connecticut's western border, along its southern coast, to Madison, and north to Meriden. The region encompassed by 203 and 475 is mostly coextensive with the Connecticut side of the New York metropolitan area.

On August 28, 1995 the original numbering plan area was split with the rest of Connecticut being served with area code 860, which was overlaid with 959 on August 30, 2014.[1]

Counties and municipalities

The counties included in numbering plan area 203/475 are:[2]

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:[2]

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 from where one can call towns in either the Hartford or New Haven exchanges toll-free from a landline telephone.

Area code 475 overlay

The Connecticut Department of Public Utility Control, in August 1999, proposed an area code overlay for the 203 area code.[3] 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;[4] this was in preparation for the overlay of area code 959 on area code 860 that was implemented in 2014.

The first range of available numbers made available in Connecticut's third area code was (475) 882-4xxx, in the Huntington section of Shelton.

See also


  1. ^ Muñoz, Hilda (March 3, 2014). "New 959 Area Code Coming To Connecticut". Hartford Courant. Hartford, Connecticut: Tribune Company. Archived from the original on March 4, 2014. Retrieved March 4, 2014.
  2. ^ a b "Archived copy". Archived from the original on July 16, 2011. Retrieved June 2, 2010.CS1 maint: archived copy as title (link)
  3. ^ Regulators Have Area Code Plan Hartford Courant, August 1999
  4. ^ Planning Letter 388 NANPA, April 14, 2009

External links

Connecticut area codes: 203/475, 860/959
North: 860, 959
West: 914, 845 area codes 203 and 475 East: 860, 959
South: 516, 631
New York area codes: 212/332/646, 315/680, 347/718/929, 516, 518/838, 585, 607, 631/934, 716, 845, 914, 917
This page was last edited on 17 February 2021, at 00:16
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