Sonoma County REDCOM (Zones)

I always here the control channels 2,3,4. But when I look up the frequencies on Radio Reference it says:

155.26500 WSX402 RM 123.0 PL Control 2 Control 2 (Zones 4/5/6/8)

154.14500 KME300 RM 146.2 PL Control 3 Control 3 (Zone 7)

154.17500 KBF851 RM 156.7 PL Control 4 Control 4 (Zone 3/9)



Where are the Zones?



Thanks

Sonoma County REDCOM (Zones)