Dundalk MD ZIP Code
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Dundalk 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 Dundalk MD zip code by its streets and block numbers if we have some of the Dundalk streets loaded in our website
Dundalk Area Code is 410/443 and Time Zone is Eastern (GMT -05:00).
Dundalk Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Dundalk City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Dundalk ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Dundalk, Maryland.
The Dundalk Zip Code is 21222.
If you want to send a mail to Dundalk City, you should use the 21222 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Dundalk 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 21222 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Dundalk 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.