Allen MD ZIP Code
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Allen city is located in Maryland State, Wicomico County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Allen MD zip code by its streets and block numbers if we have some of the Allen streets loaded in our website
Allen Area Code is 410/443/667 and Time Zone is Eastern (GMT -05:00).
Allen Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Allen City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Allen ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Allen, Maryland.
The Allen Zip Code is 21810.
If you want to send a mail to Allen City, you should use the 21810 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Allen 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 21810 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Allen 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.