From sales taxes to local identity, Colorado communities say there are a lot of reasons to fight for a unique ZIP code.

Scotland is one step closer to bringing the number down to one. The debacle has led to mail errors and packages being held ...

The ZIP code system was introduced in the U.S. in 1963, and while they're most commonly known for helping with mail ...

MAP: Arizona coronavirus cases by zip code A live-updating map of novel coronavirus cases by zip code, courtesy of ESRI/JHU. Click on an area or use the search tool to enter a zip code.