Thanks for the info. I did hear 22XX units being dispatched to I84 for accidents and traffic hazards, so assumed it was ISP, but probably sheriff deputies as you suggest. I think the 1XX units are Mountain Home PD. Also have heard 25XX units which I believe are fire department units. It is fun trying to figure this out though.
2525, 2518,2517, Are ambulances, I think 2516 is ambulance also, As for ISP, You usually do not hear them on Elmore Frequencies, You can tell ISP Apart from Elmore units as they sound deeper and more clearer. I do have ISP Programmed on the same scanner as Mountain Home, And Elmore County, So you will hear them every now and then. As for Fire, Sometimes you will get Little glimpses of Fire chat on the Mountain Home, And Elmore Scanner, However, You will hear Most, If not all of Fire traffic on the Fire scanner:
https://www.broadcastify.com/listen/feed/24438 The only time Fire guys talk on the Mountain Home, & Elmore Frequencies is if they are trying to get a hold of Dispatch if they cant on the Fire Frequency.