Here you may enter a call sign for any of the wireless services, not just Amateur Radio, and get the license information.
The 'Advanced License Search' allows you to search the FCC license database with many different filters.
You may find all of the licenses in a particular county, for example, or all the licensees whose licenses
are about to expire in a state. For public safety and commercial, find all the licensees on a particular
frequency or range of frequencies, etc.