State of Illinois
Last Updated: October 31, 2025, 02:33 am UTCLoading Map.... 

                                                                                                
| State Entity | Entity Type | 
|---|---|
| Statewide / Common / Shared | Public Safety | 
| Amateur Radio | Amateur Radio | 
| Businesses (Area/Statewide) | Business Group | 
| Chicago (ZAU) Air Route Traffic Control Center | ARTCC | 
| EMS / MedEvac / Public Health | Public Safety | 
| Federal Government / Military | Federal | 
| Illinois Department of Corrections (IDOC) | Public Safety | 
| Illinois Department of Natural Resources (IDNR) | Public Safety | 
| Illinois Department of Transportation (IDOT) | Public Safety | 
| Illinois Emergency Management Agency (IEMA-OHS) | Public Safety | 
| Illinois Railroads | Railroad | 
| Illinois State - Other Agencies | Public Safety | 
| Illinois State Police (ISP) | Public Safety | 
| Illinois Toll Highway Authority (ITHA) | Public Safety | 
| Indianapolis (ZID) Air Route Traffic Control Center | ARTCC | 
| Kansas City (ZKC) Air Route Traffic Control Center | ARTCC | 
| Marine Operations | Marine | 
| Memphis (ZME) Air Route Traffic Control Center | ARTCC | 
| SKYWARN / Amateur Radio | Public Safety | 
| Utilities (Area Wide) | Business Group | 
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                                                                                               Query by Frequency
                                                           Areawide Trunking Systems in Illinois
| System Name | Type | 
|---|---|
| STARCOM21 Statewide Illinois | Project 25 Phase II | 
 
                 
                