They are the five numbers that stand for home. Since 1963, ZIP codes have been a part of just about every piece of mail that travels through our system. But what do those numbers stand for?

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 ...

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.

Q. My company’s mailing list, which is in Excel, has thousands of names and addresses, and many of these contacts contain a nine-digit ZIP code. My manager wants to convert those with a nine-digit ...