ZIP Code 21556 is located in the county of Allegany in the state of Maryland. 21556 ZIP Code is spread between the coordinates of +39.54 Latitude and -78.89 Longitude. 21556 ZIP Code is part of the 240 area code. There are 0 postal offices in zip code 21556.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21556. 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.