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 ...

Complaints about slow mail are nothing new. But now, a new U.S. Postal Service tracker lets you see delivery statistics for yourself. The dashboard, one of the reforms included in the Postal Service ...

Mr. Zip, a gangly cartoonish figure with wide friendly eyes and a neat blue mail carrier's uniform, emerged fifty years ago to help the U.S. Postal Service promote its newest idea: five numbers added ...