I use fcc general menu reports for much researching
Theres also sites like AntennaSearch.com within a radius, They just went under a massive site redesign very user friendly
There's digitalfrequencysearch.com a database of freqs by County, State emissions designator. He also has some database importing features for scanners and DSD. good stuff. I'm sure like above theres likely many good sites that compile fcc information. invaluable research tools