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21771 ZIP Code - United States

This ZIP Code belongs to the following areas. Below you can see the map of the postal area.

City City ZIP Type Estimated Population
Mount Airy, MD PRIMARY Significado STANDARD 26.546

Postal Zone from ZIP Code 21771 - United States

21771 ZIP Code - United States
ZIP Code Tabulation Areas (ZCTAs) for 21771 ZIP Code. A ZCTA is a generalized area representation of the american ZIP Code service area.

21771 details

City Mount Airy
County Frederick, Carroll, Howard, Montgomery
State Maryland
Estimated Population 29.901
Density 135,70
Timezone America/New_York
Latitude 39.393500000
Longitude -77.156890000

Average county area weight on ZIP Code 21771

County FIP Weight
Frederick 24021 46.46%
Carroll 24013 42.51%
Howard 24027 10.11%
Montgomery 24031 0.91%

ZIP Code Maryland

Check the list of Maryland ZIP Code.

United States ZIP Code

See all the USA ZIP Code.

Status Definitions
  • PRIMARY: means an the primary city name. Official city name, although the city name might also have another acceptable name.
  • ACCEPTABLE: means an adequate city name. City names that are abbreviated will frequently be listed as unacceptable because abbreviations are not an acceptable city name format.
  • NOT ACCEPTABLE: Means an inadequate city name has been entered or received based on information entered.
  • UNIQUE: Assigned to a company, government agency, or entity with sufficient mail volume, based on average daily volume of letter size mail received, availability of ZIP Code numbers in the postal area, and the US mail service cost-benefit analysis.