Big Pool MD ZIP Code
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Big Pool city is located in Maryland State, Washington County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Big Pool MD zip code by its streets and block numbers if we have some of the Big Pool streets loaded in our website
Big Pool Area Code is 301 and Time Zone is Eastern (GMT -05:00).
Big Pool Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Big Pool City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Big Pool ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Big Pool, Maryland.
The Big Pool Zip Code is 21711.
If you want to send a mail to Big Pool City, you should use the 21711 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Big Pool 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 21711 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Big Pool 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.