Dover IL ZIP Code
Dover city is located in Illinois State, Bureau County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Dover IL zip code by its streets and block numbers if we have some of the Dover streets loaded in our website
Dover Area Code is 815 and Time Zone is Central (GMT -06:00).
Dover Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Dover City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Dover ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Dover, Illinois.
The Dover Zip Code is 61323.
If you want to send a mail to Dover City, you should use the 61323 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Dover 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 61323 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Dover 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 Illinois.