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 ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Many communities currently have outdated zip codes that may cause ...

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 ...