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.

Why are zip codes and postal codes important when it comes to credit card transactions and when do they overlap for Canadian credit card users?

The House passed two bills Monday night that would authorize the U.S. Postal Service to create 76 new ZIP codes for communities nationwide.  These ...

New USPS delivery standards could slow mail for some customers and speed it up for others. Here's what online shoppers need to know.

The House passed two bills Monday night that would authorize the United States Postal Service to create 76 new ZIP codes for communities around the country. These two bipartisan bills, led by Rep ...

Green officials say the current system, which splits the city between multiple postal codes, creates tax collection problems ...