Riderwood MD ZIP Code

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Riderwood 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 Riderwood MD zip code by its streets and block numbers if we have some of the Riderwood streets loaded in our website

Riderwood Area Code is 410/443/667 and Time Zone is Eastern (GMT -05:00).

Riderwood Zip Code - Maryland

The US ZIP Code basic format consists of five decimal numerical digits assigned to the Riderwood City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Riderwood ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Riderwood, Maryland.

The Riderwood Zip Code is 21139.

If you want to send a mail to Riderwood City, you should use the 21139 Zip Code.

In 1983, the U.S. Postal Service introduced an expanded Riderwood 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 21139 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Riderwood 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.

Riderwood, Maryland - MAP

What is the Riderwood Zip Code?

The Riderwood Zip Code in Maryland is 21139.

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Riderwood, Maryland - US Zip Code

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21139 Zip Code File:
Zip Code: 21139,
City: Riderwood
Riderwood Area Code: 410/443/667
Riderwood, MD - Time Zone: Eastern (GMT -05:00)
County: Baltimore
City Alias: Riderwood
State: Maryland
State Abb: MD

Maryland Zip+4 - Nearby Riderwood Cities

Cities near Riderwood in Maryland
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