MINNEAPOLIS (WCCO)-- 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 ...

Widespread adoption of the ZIP code can largely be attributed to a cartoon letter carrier. The U.S. Postal Service introduced the Zone Improvement Plan as a means to more efficiently sort and route ...

The postal service may be in a financial vise right now, but fifty years ago it created an economic legacy–one now reportedly worth billions of dollars a year. On July 1, 1963, it introduced the ...

Almost everyone knows their five digit ZIP code, and probably a few others within their city, but what’s up with the extra four digits you sometimes see on mail? Let’s start with those first five ...