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.

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?

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.

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 U.S. Postal Service began using the five-digit ZIP code in 1963. In recognition of the anniversary, we've examined the list of more than 40,000 ZIP codes and highlighted a few that deserve ...

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.