Ringgold PD

Staying at a relative's place in Ringgold. Does anyone know where their PD operates these days? The UHF channels listed in the database seem vacant. I am hearing Catoosa county sheriff on the TN system - is Ringgold too?

Ringgold are "400" numbered cars on Catoosa SO groups. Not to be confused with "400" numbered cars on Fort Oglethorpe PD group as those are Chickamauga NPS units.
BG..