320th ST is a street in Hillsdale city, Illinois.
By selecting some of the 320th ST block numbers you can know the 320th ST Zip code Plus four for that address
Some zip codes are also applicable to both even and odd blocks. In such cases, you will see a (B) at the block range.
320th ST in Hillsdale, Illinois
The U.S. Postal Service introduced an expanded Hillsdale ZIP code system that it called ZIP Plus 4, often called "plus-four codes", "add-on codes", or "add ons".
A ZIP+4 code uses the basic Zip code plus four additional digits related to 320th ST to identify a geographic segment within the five-digit delivery area, such as a Hillsdale (Rock Island county), Illinois 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.
In zip-codes.me you can search the Hillsdale ZIp code in Illinois, related to 320th ST, Hillsdale blocks.