Question: My son is insisting that I can send him postcards to his name and 9-digit ZIP code, with no street address included. I don’t believe him. What’s the story and how do ZIP+4 ZIP codes work?

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 ...

U.S. zip codes were designed in 1963 to tell USPS how to sort your mail — but now they might tell others how you live your life. Software company Esri’s Tapestry Segmentation project has combined U.S.