A postal code is a five digit code used to help postal services deliver mail and packages. Here's what the numbers mean and how they determine yours.

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.

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.

What’s in a Postal Code? When giving directions to someone, you can simply state the Postal Code of your destination. Find the Postal Code and District in Singapore.