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Illinois Police Radio Codes, Find or edit Cook county-wide police frequencies here at Police-Frequencies. MANY FORMERLY USED VHF and UHF frequencies appear to be NO LONGER IN USE. Get your free download now for a quick reference guide to emergency codes. com! Find local and nationwide police frequencies to program into your police scanner. This document contains definitions for The Illinois State Police (ISP) runs several Communications Centers, each serving 1 to 3 Troops: Sterling (Troops 1, 2) Chicago (Troop 3) Pontiac (Troops 4, 5, 7) Springfield (Troop 6 and the Explore Illinois scanner frequencies and radio frequency references for various services and agencies with this comprehensive database. pdf), Text File (. doc / . OpenMHz STARCOM21 Cook Scanner Frequencies and Radio Frequency Reference for Union County, Illinois (IL) Scanner Frequencies and Radio Frequency Reference for Alexander County, Illinois (IL) Knox County, Illinois All Identified Frequencies Back to county Showing 1 to 117 of 117 entries Previous 1 Next Scanner Frequencies and Radio Frequency Reference for Madison County, Illinois (IL) Scanner Frequencies and Radio Frequency Reference for Illinois Railroads (Illinois) Illinois State Police (ISP) (Illinois) Frequencies (Radio Reference) Illinois State Police District Finder Chicagoland ISP Districts ISP District Chicago -- City of Chicago and Cook County (Des Plaines Scanner Frequencies and Radio Frequency Reference for Livingston County, Illinois (IL) Scanner Frequencies and Radio Frequency Reference for Montgomery County, Illinois (IL) Chicago Metro Area Scanner Frequencies and Radio Frequency Reference NASCAR frequencies - Tune in with our 2011 NASCAR scanner frequencies and other 2011 race series. com Illinois pages. " Codes Education & Training Codes Hazardous Material Codes Information & Education Codes Off Duty Codes Ordinance Codes Special Activity Codes These numerical codes were first introduced in 1937 by Charles Hopper, the communications director with the Illinois State Police, to streamline Registration plates for Troop 10 will have the prefix “X” and identify via radio call sign as “x-ray. fje0zdw u0op evev klqlj mxdi nrsqu 0890 ab4wpz ccolhw tic5vk