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. Back ...

Converting ZIP codes to latitude and longitude coordinates unlocks location functionality that ZIP code strings alone can’t support — distance calculations, radius searches, map markers, delivery zone ...

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 ...

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, ...

Everyone knows the ZIP code 90210—but what about these other notable codes around the country? The Zone Improvement Plan, otherwise known as the ZIP code, is the network of postal codes the U.S.

Postmaster General J. Edward Day, left, and two city letter carriers posing with Mr. Zip in 1963. (N/A/United States Postal Service.) Perspective by John Kelly While vacationing at his Texas ranch in ...

An area ZIP code map from the United States Postal Service’s 2024 facility review of Champaign’s Mattis Avenue post office. An area ZIP code map from the United States Postal Service’s 2024 facility ...