Here in northern California, we have a mix of services using everything including loband (30-50mhz), highband (150-174mhz), UHF (450-470mhz), T-Band UHF (470-512mhz), and 800Mhz.
Most police is on UHF and T-Band, but CHP is on loband, and some of the less densely populated cities/counties are on highband VHF.
There are also a few cities/counties using 800mhz trunked systems, both analog and digital and a couple using T-band digital trunked systems,.
Most fire is on highband VHF, with a small amount of loband, UHF, and 800. Cal Fire is on highband statewide.
In general, highband tends to be the most popular, except in the urban areas, where UHF and 800 enter the picture.
In Santa Clara county, in the heart of Silicon Valley, there is one city using 800 analog trunking, the rest have police on UHF and T-band, with a few of the outlying cities, and the sheriffs office on highband. Most of the fire departments are on highband, with the exception of the city with the 800 system, and a couple on UHF and T-band.
Also, while most DTV is on channels 7 and up, there are DTV assignments in some areas all the way down to channel 2.
Hams actually have several bands in the VHF/UHF spectrum above 30mhz, including 50-54, 144-148, 222-225, 420-450 (430-450 along the Canadian border), 902-928, 1240-1300, and a bunch of stuff at 2.4ghz and higher.
I just spent the weekend operating the ARRL June VHF contest, on all of the above bands below 2.4ghz.
