In 1983 The US Postal service introduced expanded Council Grove ZIP code system called ZIP+4 often called "plus-four codes", "add-on codes", or "add ons", and make the basic 66846 Zip code and four additional digits to identify a geographic segment within the five-digit delivery area, like Council Grove city interested themselves, can access an individual high-volume receiver of mail and unit with segments that could used in delivery in Kansas.
In 1983, the U.S. Postal Service introduced an expanded Council Grove 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 66846 Zip code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a Council Grove 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 Kansas.