I like this one:
Site / Frequency Query
I leave Service at All Services:
Then click on the State & County I want to check.
Under frequency I might put a Begin and End set of freqs like 150 & 174 or 451 & 470 or 851 to 870 to help filter out lot of stuff I won't be checking with my scanner anyway. I really don't like sorting through all the Nextel stuff that comes up in the 851 MHz band.
And I really like using the Location Specification with a lat/long which I get from an address at Google Maps, or other sources to get a lat/long, and then with the Location Search Method I click on Point Radius with a 1 or 2 mile distance using a set of Begin and End freqs to look for a license for a business or agency of the lat/long. I just need to make sure I have the same state, or leave the state blank, for a lat/long when I check that way or it won't give a return.
Then I click on Submit Query.