There is also another type of postal code, the ZIP + 4 code. According to unitedstateszipcodes.org, the ZIP + 4 was established in 1983 and identifies an even more specific location within a ZIP code.

On July 1, 1963, the U.S. Post Office Department introduced the ZIP code program to get a handle on the heaping surplus of mail. Today, those five digits represent much more for American society.

In Hernando County, there are 17 ZIP codes, or "delivery areas." They range from 34601 to 34614, excluding 34612, which is a ZIP being held in abeyance for future use, said Brooksville Postmaster ...

Two years ago, the U.S. Postal Service changed ZIP codes in parts of Hernando, Pasco, Hillsborough and Pinellas counties to speed mail delivery. Almost 141,500 customers were affected then.

On July 1, 1963, the U.S. Post Office Department introduced the ZIP code program to get a handle on the heaping surplus of mail. Today, those five digits represent much more for American society.