Use this search tool to locate DMR, NXDN in your area. It's pretty handy and updated often.
FCC Service and Station Codes Digital Frequency Search
That is a great site but it should be known that the site gets its info from FCC records. That means any freqs in question may or may not be in use. Same with any other freq the site, and the fcc display. Both sites only tell you the freq, ownership, emission and wattage, etc. Radioreference lists confirmed in use freqs.
And after searching your county and state, if you select the show only new, be aware that there most likely will not be any activity on any of those as they are new license grants, and most likely have not been built out. When I find new licenses of interest, I plug the freqs in a group in SDR# and or my 436 labeled new grants. Sometimes when one gets a new license, they are on the air kinda quick. Sometimes it takes a few months.