ScanCal - OES official site - CALSIEC
OES Fire
Tactical, firecamp, etc.
154.160 - OES Fire Net 1a and 1b
154.220 - OES Fire Net 2a and 2b

Fire Mutual Aid
Fire and Fire-based EMS single-agency use permitted
853.9875 CAFIRE 1
851.9125 CAFIRE 2

CA Fire Interop
Tactical - RX tone 156.7
154.280 VFire 21
154.265 VFire 22
154.295 VFire 23
154.2725 VFire 24
154.2825 VFire 25
154.3025 VFire 26

CALCORD
California Coordination
used for fire-ems-law on scene comms
156.075 CALCORD

CLEMARS
CA Law Enforcement Mutual Aid Radio System
154.920 CALAW 1
154.935 CALAW 2 (low power)
155.475 CALAW 3 (also VLAW31)
460.025 CALAW 4 (5 repeated)
39.460 CALAW 6 (also LLAW1)
853.5125 CALAW 8 (9 repeated)
851.200 CALAW 9
484.2375 CALAW 5D Within 80mi of Los Angeles only

CLERS
CA Law Enforcement Radio System
Used for dispatch-to-dispatch linking
Has been used for tactical also

158.790 CLERS 1
155.070 CLERS 2
154.710 CLERS 3
155.910 CLERS 4
155.700 CLERS 5
453.675 CLERS 6
453.875 CLERS 7
453.825 CLERS 8

CESRS
California Emergency Services Radio System
Statewide linked VHF network - simplex travel net for fire striketeams, repeater and simplex use for OES and DGS Radio Techs.

153.755 CESRS ("ceasers")

CMARS
California Multiple Agency Radio System
(small state agencies, subscription based. Single repeaters throughout the state.)
856.2625
857.2625
866.5375
867.5375
860.100
860.125

Interoperability is defined as:
"The ability of public safety service and support providers to talk with each other via voice and data:
- On demand
- In real time
- When needed
- When authorized
It is not the ability to talk to everyone, all of the time."

Interoperabilty allows different disciplines to talk together, such as Fire, EMS, Law, etc. The following channels are nationwide Interop channels used in simplex, repeated, or even cross-band linked so a VHF channel can pop out on an 800MHz channel etc. Some states are setting up linked systems covering the entire state utilizing these frequencies to promote interoperabilty. They cannot be used for tacticals by single-agencies.

VHF
155.7525 VCall 10
151.1375 VTac 11
154.4525 VTac 12
158.7375 VTac 13
159.4725 VTac 14

UHF
453.2125 UCall 40
453.4625 UTac 41
453.7125 UTac 42
453.8625 UTac 43

800MHz
851.0125 ICall 90
851.5125 ITac 91
852.0125 ITac 92
852.5125 ITac 93
853.0125 ITac 94