Without a postal or ZIP code, however, this mail may not make it to you. What is a postal code? We have the answers. A postal code is a set of specific numbers, and sometimes letters, that helps ...

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.

One of the most important pieces of data is the billing zip code associated with your credit or debit card. A billing zip code is the zip code associated with the billing address you have on file ...