ZIP Code 21705
Frederick, Maryland · Frederick County
No9143
Zip21705
TypePO BOX
Decommissioned0
Primary CityFrederick
Acceptable Cities—
Unacceptable Cities—
StateMD
LstateMaryland
CountyFrederick County
TimezoneAmerica/New_York
Area Codes227, 240, 301
World RegionNA
CountryUS
Latitude39,41
Longitude-77,41