ZIP Code 21639 is located in the county of Caroline in the state of Maryland. 21639 ZIP Code is spread between the coordinates of +38.9680164 Latitude and -75.80404669 Longitude. 21639 ZIP Code is part of the 410 area code. There are 0 postal offices in zip code 21639.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 21639. 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.