The humble ZIP Code shows up in all kinds of surprising places. Planet Money looks at how it was born, how it transformed the mail and talks to one researcher who argues that it's gone too far. The ...

Seven of the 10 most expensive ZIP codes in the United States sit in California, which probably comes as no surprise to many Californians. But the nation’s priciest ZIP code, 33109, lies on Fisher ...

Clock tower in Overland Park, which is the site of most of the top five most expensive ZIP codes in Kansas. In a recent study, we analyzed and identified the most expensive ZIP codes in Nebraska.