Graphic database allows searches by frequency, location, name, or licensee category.
The FCC has released its “Spectrum Dashboard,” a graphic-interface database of frequencies and licensees from 225 MHz to 3700 MHz. (Check out the graphic to the left, which is a partial screen grab of the "Browse Spectrum Bands" function of the Dashboard at work.) You can search by spectrum band, geographic area, licensee name, or FCC licensee category.
Although very much a beta release, and limited in scope of spectrum, it is fun to play with. If you like that sort of thing. And we know some of you do.