I did a quick comparison of the RR database against all of the frequencies from the FCC database. The following frequencies are not in the RR database. I don't know if that will help or not.
Frequency Callsign Entity Granted Svc Code
150.77500 WQDM668** CARTER COUNTY EMERGENCY RESCUE SQUAD *
150.79000 WPTV352** CARTER COUNTY EMERGENCY MANAGEMENT * 2011-11-05 * PW * FX1 *
150.79000 WPTV352** CARTER COUNTY EMERGENCY MANAGEMENT * 2011-11-05 * PW * MO *
153.86000 WPJP871** ELIZABETHTON, CITY OF * 2011-08-09 * PW * FX1 *
153.86000 WPJP871** ELIZABETHTON, CITY OF * 2011-08-09 * PW * MO *
153.95000 WNFF968** CARTER CO FIRE ASSOCIATION * 2015-07-15 * PW * FX1 *
153.95000 WNFF968** CARTER CO FIRE ASSOCIATION * 2015-07-15 * PW * MO *
153.98000 WNXJ393** CARTER, COUNTY OF * 2013-02-02 * PW * FX1 *
153.98000 WNXJ393** CARTER, COUNTY OF * 2013-02-02 * PW * MO *
153.99500 WQFQ855** ELIZABETHTON, CITY OF * 2006-09-12 * PW * FX1 *
153.99500 WQFQ855** ELIZABETHTON, CITY OF * 2006-09-12 * PW * MO *
155.20500 KNCJ865** CARTER COUNTY EMERGENCY RESCUE SQUAD *
156.15000 WPJP871** ELIZABETHTON, CITY OF * 2011-08-09 * PW * FX1 *
156.15000 WPJP871** ELIZABETHTON, CITY OF * 2011-08-09 * PW * MO *
156.19500 WPTV807** Carter County of * 2011-09-29 * PW * FX1 *
156.19500 WPTV807** Carter County of * 2011-09-29 * PW * MO *
158.87250 WQUF974** CARTER, COUNTY OF * 2014-06-26 * PW * FX1 *
158.87250 WQUF974** CARTER, COUNTY OF * 2014-06-26 * PW * MO *
158.89500 WQFQ274** ELIZABETHTON, CITY OF * 2006-09-06 * PW * FX1 *
158.89500 WQFQ274** ELIZABETHTON, CITY OF * 2006-09-06 * PW * MO *
457.27500 KNCJ865** CARTER COUNTY EMERGENCY RESCUE SQUAD *
458.52500 WPXI297** CARTER, COUNTY OF * 2013-02-02 * PW * FX1 *
465.48750 WPJP871** ELIZABETHTON, CITY OF * 2011-08-09 * PW * FX1 *
811.96250 WPUG721** ELIZABETHTON, CITY OF * 2012-01-31 * GP * MO *