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?

A recent study compares postal zones, ranking those with the most in-demand listings and the fastest-selling homes.

Everyone knows the ZIP code 90210—but what about these other notable codes around the country? The Zone Improvement Plan, otherwise known as the ZIP code, is the network of postal codes the U.S ...

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 ...

Estero ZIP code postal flap The U.S. Postal Service will allow all residents of Estero to use the village as a mailing address, even if their ZIP code comes back as a Fort Myers or Bonita address.