Mason IL ZIP Code
Mason city is located in Illinois State, Effingham County and has a unique zip code assigned by the US Postal Service Office.
You can search for the Mason IL zip code by its streets and block numbers if we have some of the Mason streets loaded in our website
Mason Area Code is 618 and Time Zone is Central (GMT -06:00).
Mason Zip Code - Illinois
The US ZIP Code basic format consists of five decimal numerical digits assigned to the Mason City. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the Mason ZIP code, a hyphen, and four more digits that determine a more specific location within a given ZIP code in Mason, Illinois.
The Mason Zip Code is 62443.
If you want to send a mail to Mason City, you should use the 62443 Zip Code.
In 1983, the U.S. Postal Service introduced an expanded Mason 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 62443 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Mason 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.