Zip Area Code

Secretary, Maryland

Secretary, Maryland, in Dorchester County, has ZIP code 21664 and area code 410, with overlays 443 and 667.

ZIP code
21664
Area codes
410, 443, 667
Time zone
Eastern Time
Coordinates
38.6093, -75.9474

ZIP codes in Secretary

ZIP codePost officeCountyArea codes
21664SecretaryDorchester County410, 443, 667

Area codes for Secretary

  • Area code 410

    In service since October 6, 1991. Shares its area with 443 and 667. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 443

    In service since June 1, 1997. Shares its area with 410 and 667. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 667

    In service since March 24, 2012. Shares its area with 410 and 443. 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

Secretary is in the Eastern Time zone.

Towns near Secretary