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

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 ...

Nowadays, people don't send letters to one another when they want to catch up. You may get holiday or birthday cards from your parents, grandparents or other family members and friends, but for the ...

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 ...