List of Connecticut area codes

The U.S. state of Connecticut is divided into two numbering plan areas, each configured as an overlay complex of two area codes each.

Area code Year created Parent NPA Overlay Numbering plan area
203 1947 203/475 Southwestern Connecticut (Fairfield County (except for Sherman); New Haven County, and the towns of Bethlehem, Woodbury, as well as a small part of Roxbury in Litchfield County)
475 2009 203
860 1995 203 860/959 Northern and eastern Connecticut
959 2014 860
  • "New Area Codes Becoming More Prevalent in Connecticut; 475 and 959 Grow in Usage". Connecticut by the Numbers. 2017-10-03. Retrieved 2024-02-12.
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