List of Connecticut area codes

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This is a list of area codes in Connecticut:

203 - Covering southwestern Connecticut (roughly Fairfield and New Haven counties)
475 - Overlays 203, beginning December 2009
860 - Remainder of Connecticut

In 1999, Connecticut announced that there would be two additional codes to be implemented when needed: 475, which will overlay 203; and 959, which will overlay 860. In March 2009, NANPA announced that Area Code 475 will be created starting in December 2009.

v • d • e Lists of area codes in the North American Numbering Plan

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