ZIP Code 21718 is located in the county of Frederick in the state of Maryland. 21718 ZIP Code is spread between the coordinates of +39.3923561 Latitude and -77.62798206 Longitude. 21718 ZIP Code is part of the 240 area code. There is 1 postal office in zip code 21718.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21718. Always when you mail a package or a letter, be attentive to mention the preferred or acceptable cities. Using any city in the list of unacceptable cities may result in unforseen delays.