page_title: Area codes 203 and 475
hierarchical_section_title: Area codes 203 and 475
caption_attribution_description: English: Area code map for 203/475 in Connecticut
context_page_description: 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 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.
context_section_description: 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.
caption: Connecticut state map with numbering plan area 203/475 highlighted.
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