thedirectory - Area Code 203 History

Area Code 203 History - Connecticut

Significant events for area code 203

Date
Details

1947 Original area code for all of Connecticut

August 28, 1995 Area code 203 was split, with 860 covering all but the southwestern part of Connecticut.

December 12, 2009 Area code 475 was ovelaid on 203.

Date	Details
1947	Original area code for all of Connecticut
August 28, 1995	Area code 203 was split, with 860 covering all but the southwestern part of Connecticut.
December 12, 2009	Area code 475 was ovelaid on 203.

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