Gunpowder MD ZIP Code
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Gunpowder city is located in Maryland State, Harford County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Gunpowder MD zip code by its streets and block numbers if we have some of the Gunpowder streets loaded in our website
Gunpowder Area Code is 410/443 and Time Zone is Eastern (GMT -05:00).
Gunpowder Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Gunpowder City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Gunpowder ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Gunpowder, Maryland.
The Gunpowder Zip Code is 21010.
If you want to send a mail to Gunpowder City, you should use the 21010 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Gunpowder 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 21010 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Gunpowder 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.