I've noticed how lots of VHF and VHF-Lo band frequencies aren't being used anymore. VHF being used for the fire tac channels (in the northern part of the county) is most likely now is using NC VIPER for the fire ops (under Iredell county using TAC 2, TAC 3, etc.) and the NCDOT is either using Nextel phones or on NC VIPER and NCSHP channels being very quiet, I suspect that they are in VIPER completely. I was at a barn fire in the area within walking distance and I tried tuning around the operations frequencies, but heard nothing, so I suspect that they aren't used anymore.