When You're So Important You Get Your Own Code
Usually, a ZIP code covers a town or a large neighborhood. But in rare cases, a single entity receives so much mail that the postal service assigns it an exclusive code. The President of the United States, for example, receives mail at 20500—a ZIP code exclusively dedicated to the White House.
Santa Claus, Indiana
The town of Santa Claus in Indiana, USA, has a very special ZIP code: 47579. Every year, during the holiday season, the local post office is flooded with thousands of letters addressed to Santa. A group of dedicated volunteers, known as "Santa's Elves," ensures that every letter with a return address gets a reply.
Corporate Giants and Skyscrapers
Some massive buildings are essentially vertical cities. The Empire State Building in New York has its own dedicated ZIP code (10118) because it houses so many businesses. Similarly, large corporations and universities often receive unique codes to streamline the massive influx of daily correspondence.