Go to the
database link at the top of the page.
Go to your state and county.
Click on the FCC Licenses tab on your county
Click on DIsplay all FCC Licenses in [county] [state]
Then you can sort by frequency order and turn on the services that are turned off by default.
Assuming you are in Douglas County you would see:
https://www.radioreference.com/apps/db/?action=fccLicenses&ctid=1678&os=0&s=fr&bf=479
You might want to do that for your county and surrounding counties and bookmark the links.
You can also go to the main database page, scroll down to Search FCC Data and search for individual frequencies in your state,
or go to the database page for your state and click the Search tab to search for individual frequencies in your state.
https://www.radioreference.com/apps/db/?stid=31&tab=search
If you are in the Omaha area you might be able to hear some stuff in Iowa so you would have to search that state separately.
The main database page for each county only contains what has been submitted by users. This is mostly public safety type stuff. The searches I described above will show most FCC licenses including tons of businesses that are not shown in the RRDB. It won't show federal government users.