On line Police/Fire/Ems Scanner

here is a link to an online scanner feed for the high desert,
http://www.radioreference.com/apps/audio/?feedId=4937

And here is the link for the rest of the U.S.
http://www.radioreference.com/apps/db/
North High Desert Coverage(Barstow Area): Sheriff Station 8&18, County Fire, Barstow Police, MCLB Fire, & Comm.Center.

This is a Motorola type 2 800mhz trunking repeater which will monitor
County Sheriff Station 8,18,& 29(Barstow, Apple Valley, Baker, & Trona) TGID-304 (2-DC-1) *(1-DC-3, D-LAW-6 patched in)*
County Fire (All that is Patched to 2-Fire-1, Barstow Fire District Now On 2-fire-1) TGID-1904 & 2256 (2-Fire-1, 2-FGND-1)*(D-Fire-3 & 4 patched in)*
City Police(Barstow Police Dept.) TGID-17200 (2-BAPD-1)*(D-LAW-5 patched in)*
MCLB Fire(Nebo & Yermo Base) TGID - 20016 (2-MCLB-1)
Comm Center (Interop with Fire & ALS Units [Air Ships]) TGID-16016 (2-COMMCEN)
This is San Bernardino County System #2 which covers the I-15 from Wildwash past Yermo area, Kramer Jct(Highway 58 & 395), and I-40 to the Ludlow area.   You will hear other unincorperated areas patched to Co. Fire. 
VHF Operations:
Desert Ambulance - 155.280 mhz (Dispatch)
Calfire on Local 2 - 151.325 mhz (Fire Dispatch)
LifeComm - 155.220 mhz  (Mercy Air Dispatch)
Calcord - 156.075 mhz (Agency Interops & Air To Ground Tactics)