ZIP Code 20431
Post Office City: Washington, DC
County: District of Columbia
State: District of Columbia
Time zone: America/New_York
Latitude: 38.89895
Longitude: -77.04419
ZIP Code Type: Unique ZIP Code
Unique ZIP Codes in the U.S. are assigned to single organizations receiving high volumes of mail, such as large companies or government agencies. Their purpose is to facilitate efficient mail sorting and delivery for these entities.
Demographic and population data are not available for these codes as they don't correspond to residential or community areas.
Learn more about Unique ZIP Codes.
ZIP Codes by State
ZIP Codes by U.S. Territories
ZIP Codes by Federal Districts
Military ZIP Codes
Army Post Offices - Associated with Army or Air Force installations.
Fleet Post Offices - Associated with Navy installations and ships.
Diplomatic Post Offices - Associated with U.S. Diplomatic locations.