ZIP Code 20166 is located in the county of Loudoun in the state of Virginia. 20166 ZIP Code is spread between the coordinates of +39.0064062 Latitude and -77.42803103 Longitude. 20166 ZIP Code is part of the 571, 703 area code. There is 1 postal office in zip code 20166.
On the below highlighted section you can find the cities which the US Post Office accepts for ZIP code 20166. 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.