ZIP Code 21771
Mount Airy, Maryland · Frederick County
No9183
Zip21771
TypeSTANDARD
Decommissioned0
Primary CityMount Airy
Acceptable Cities—
Unacceptable Cities—
StateMD
LstateMaryland
CountyFrederick County
TimezoneAmerica/New_York
Area Codes227, 240, 301, 410, 443, 667
World RegionNA
CountryUS
Latitude39,37
Longitude-77,15