NAC 59C AND NAC 167 ON 170.8375. I do not see 59C for Federal on RR.
I am in the West-Texas region of Texas. We know that NAC 167 is more than likely the FBI, but this NAC 59C seems to be not common.To be honest it would help us to know where you are located at. From what I am finding via Google that 170.8375 is used by FBI all depends where your location is and etc.