Conowingo MD ZIP Code
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Conowingo city is located in Maryland State, Cecil County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Conowingo MD zip code by its streets and block numbers if we have some of the Conowingo streets loaded in our website
Conowingo Area Code is 410 and Time Zone is Eastern (GMT -05:00).
Conowingo Zip Code - Maryland
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Conowingo City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Conowingo ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Conowingo, Maryland.
The Conowingo Zip Code is 21918.
If you want to send a mail to Conowingo City, you should use the 21918 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Conowingo 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 21918 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Conowingo 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.