The Guide to Worldwide Postal-Code and Address Formats is your single source for information and examples of postal-code and address formats for more than 200 countries and territories.

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.

What is a credit card postal code? Postal codes in Canada are a six-character string consisting of three letters and three digits. For example, the postal code for the CN Tower in Toronto is M5V 3L9.

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.