Zip Area Code

Darien, Connecticut

Darien, Connecticut, in Fairfield County, has ZIP code 06820 and area code 203, with 475 as an overlay.

ZIP code
06820
Area codes
203, 475
Time zone
Eastern Time
Coordinates
41.0768, -73.4853

ZIP codes in Darien

ZIP codePost officeCountyArea codes
06820DarienFairfield County203, 475

Area codes for Darien

  • Area code 203

    In service since 1947. Shares its area with 475. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 475

    In service since December 12, 2009. Shares its area with 203. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Darien is in the Eastern Time zone.

Towns near Darien