ZIP codes are five-digit numbers, such as the famous 90210. Why credit card postal codes and ZIP codes matter Your postal code or ZIP code acts as a security measure.

The U.S. Postal Service started using the current ZIP code system in 1963. This is what each digit means and how they get mail into your mailbox.

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 letter without a ZIP code may not reach its intended destination. That is because of the way addresses are read by automated postal systems.

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 ...

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