Keymar MD ZIP Code
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Keymar city is located in Maryland State, Carroll County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Keymar MD zip code by its streets and block numbers if we have some of the Keymar streets loaded in our website
Keymar Area Code is 443/410 and Time Zone is Eastern (GMT -05:00).
Keymar Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Keymar City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Keymar ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Keymar, Maryland.
The Keymar Zip Code is 21757.
If you want to send a mail to Keymar City, you should use the 21757 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Keymar 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 21757 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Keymar 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.