Randallstown MD ZIP Code
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Randallstown city is located in Maryland State, Baltimore County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Randallstown MD zip code by its streets and block numbers if we have some of the Randallstown streets loaded in our website
Randallstown Area Code is 443/410 and Time Zone is Eastern (GMT -05:00).
Randallstown Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Randallstown City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Randallstown ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Randallstown, Maryland.
The Randallstown Zip Code is 21133.
If you want to send a mail to Randallstown City, you should use the 21133 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Randallstown 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 21133 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Randallstown 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.