Mount Airy MD ZIP Code
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Mount Airy city is located in Maryland State, Frederick County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Mount Airy MD zip code by its streets and block numbers if we have some of the Mount Airy streets loaded in our website
Mount Airy Area Code is 240/301 and Time Zone is Eastern (GMT -05:00).
Mount Airy Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mount Airy City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mount Airy ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mount Airy, Maryland.
The Mount Airy Zip Code is 21771.
If you want to send a mail to Mount Airy City, you should use the 21771 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mount Airy ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons". A ZIP+4 code uses the basic 21771 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mount Airy city block, a group of apartments, an individual high-volume receiver of mail or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery in Maryland.