Use the FCC website and research the TN listings http://wireless2.fcc.gov/UlsApp/UlsSearch/searchAdvanced.jsp
and put 0005046297 iin the FRN line. Then look through every result and see the freqs and locations. Then repeat that for each town that TN dispatches so you can get the frequencies that the individual departments are licensed to use.
Another reference is the archive search here and on Connscan since it seems that similar info has been requested before. It was also asked on Fordyces site before that shut down.
Save your results for future reference.