The familiar five-digit number was part of a nationwide effort to modernize the mail.

One of the most important breakthroughs in modern communication lies in an overlooked place. It’s printed onto envelopes, just below the address. Although we think nothing of the ZIP Code these days, ...

We all have one, we know it by heart, and we share it with our neighbors. But chances are you haven't thought that much about this ubiquitous part of American life — the ZIP code. We all know about ...

TEMPE, Ariz. - Officials with the United States Postal Service announced on June 3 that a new ZIP Code has been allotted for Tempe. According to the statement, the ZIP Code 85288 has been created for ...

That used to be the ZIP code for Silver Cliff, Colorado, before the U.S. Postal Service removed it from use and forced the town to use neighboring Westcliffe’s ZIP code. “We lost our identity,” said ...

Today marks the 50th anniversary of the Zone Improvement Plan, the network of ZIP codes we use for everything from mail delivery to credit card security. The U.S. Postal Service began using the ...

Mayor JohnPaul O’Connor has announced that Westlake residents will have to wait until July 2027 for the chance to secure their own unique ZIP code.