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.

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.

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

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?

In between the slugfests over Medi-Cal, taxes and immigration, the House of Representatives has voted to give Tehachapi a new ZIP code. Four other California communities also got new five-digit codes, ...