Microbroadcasting: find unused FM radio frequencies

You can broadcast your own (small) AM or FM radio station, as long as it doesn’t access licensed broadcast frequencies.

Part 15 regulations govern all the many varieties of low-power RF transmitters in use today, including “cordless phones, baby monitors, garage door openers…”J. Hale, Go Beyond Now

Find unused Radio Frequencies with RadioLocator.com. Here is an example of what I found locally to me:

The FCC also offers the option to search for unused frequencies on their Low Power FM (LPFM) page. Note: the FCC isn’t accepting low power FM applications now, so you have to stick to broadcasting your own signal for yourself.