Zip Area Code

Greenwich, Connecticut

Greenwich, Connecticut, in Fairfield County, has ZIP codes 06830, 06831 and 06836 and area code 203, with 475 as an overlay.

ZIP codes
06830, 06831, 06836
Area codes
203, 475
Time zone
Eastern Time
Coordinates
41.0414, -73.6380

ZIP codes in Greenwich

ZIP codePost officeCountyArea codes
06830GreenwichFairfield County203, 475
06831GreenwichFairfield County203, 475
06836*GreenwichWestern Connecticut203, 475

* No mapped delivery area: P.O. boxes or a single organization. Area codes are those of the nearest ZIP code area.

Area codes for Greenwich

  • 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

Greenwich is in the Eastern Time zone.

Towns near Greenwich