Note: This is a listing of deprecated systems. These systems are either no longer in use or have been superceded by another system.
| System Name | Type | Flavor | City | County | Updated |
|---|---|---|---|---|---|
| Tri-Star Communications Incorporated (Deprecated) | LTR | Standard | Plato Center | Kane | 2018-07-20 |
| unidentified Joint National Federal Government P25 - MO IL [Deprecated] | Project 25 | Phase I | Mascoutah | Multi-County [6] | 2018-07-20 |
| A-Beep - Chicagoland Speedway (Joliet) | LTR | Standard | Joliet | Will | 2018-07-02 |
| A-Beep - UHF (Chicago) | LTR | Standard | Chicago | Cook | 2018-07-30 |
| A-Beep - UHF-T (MetroChicago) | LTR | Standard | Metro Chicago | Multi-County [9] | 2018-07-05 |
| A-Beep / Radio Dispatch Incorporated - UHF-T (Chicago) | LTR | Standard | Chicago | Multi-County [4] | 2018-07-30 |
| A-Beep / Tri-Star Communications - UHF (NW IL) | LTR | Standard | Loves Park | Multi-County [8] | 2023-03-20 |
| A-Beep / Tri-Star Communications - VHF (NW IL) | LTR | Standard | Plato Center | Multi-County [7] | 2023-03-20 |
| A-Beep UHF - De Kalb | LTR | Standard | De Kalb | DeKalb | 2022-03-24 |
| Abbott Laboratories (N Chicago) | Motorola | Type II | North Chicago | Lake | 2021-03-02 |
| Advanced Wireless Telecom / Campbell, Gary - UHF (O\'Hare) | LTR | Standard | Chicago | Cook | 2009-03-30 |
| Albertsons Companies, dba Jewel-Osco Distribution Center (Melrose Park) | LTR | Standard | Melrose Park | Cook | 2023-05-23 |
| Allegro Comms SMR/Seibert Family Inc | Motorola | Type II Smartnet | Chicago | Cook | 2005-10-29 |
| Alliant Energy (iDEN) | iDEN | Standard | Various | Multi-County [106] | 2017-08-11 |
| Ameren P25 - 800 MHz (Statewide IL) [Deprecated] | Project 25 | Phase I | Sangamon | 2018-07-20 | |
| AmerenCilco (Central IL) (Deprecated) | Motorola | Type II SmartZone Omnilink | Various | Multi-County [11] | 2018-07-20 |
| AmerenCilco - 800 MHz (Peoria) | Motorola | Type II Smartnet | Peoria | Peoria | 2010-03-29 |
| AmerenIL (P25) | Project 25 | Phase I | Statewide | Statewide | 2013-04-16 |
| AmerenIllinois | Motorola | Type II SmartZone | Various | Multi-County [30] | 2013-04-20 |
| AmerenIllinois Power Plants | EDACS | Narrowband Networked | Various | Multi-County [2] | 2020-07-29 |
| AmerenMissouri (EDACS) | EDACS | Networked Standard | Various | Multi-County [59] | 2018-06-06 |
| Anderson Packaging - Rockford | LTR | Standard | Rockford | Winnebago | 2018-07-30 |
| Archer Daniels Midland (Decatur) | Motorola | Type II | Decatur | Macon | 2020-03-02 |
| ARINC (O'Hare International Airport - Chicago) | Motorola | Type I | Chicago | Cook | 2018-07-21 |
| ARINC - iDEN (O'Hare International Airport - Chicago) | iDEN | Standard | Chicago | Cook | 2018-06-18 |
| ARINC - UHF (Midway Airport - Chicago) | iDEN | Standard | Chicago | Cook | 2018-05-17 |
| ATT Illinois (Chicago Metro) | Motorola | Type II | Various | Cook | 2018-07-30 |
| Aurora Public Safety (Deprecated) | Motorola | Type II Smartnet | Aurora | Kane | 2014-11-28 |
| Bi-State Development Agency - METRO (Deprecated) | Project 25 | Phase I | St Louis Metro | Multi-County [5] | 2014-11-28 |
| BP-Amoco Corporation (Naperville) | Motorola | Type II Smartnet | Naperville | DuPage | 2019-11-25 |
| Cardinal Health (Woodstock) | LTR | Standard | Woodstock | McHenry | 2018-07-30 |
| Cardinal Health Pharmaceuticals - UHF (McHenry) | LTR | Standard | Woodstock | McHenry | 2009-09-11 |
| Casino Queen (E St. Louis) | Motorola | Type IIi Hybrid | East St Louis | St. Clair | 2017-04-03 |
| Casino Queen - E St. Louis (DMR) | DMR | Tier 3 Standard | East St Louis | St. Clair | 2021-07-05 |
| Caterpillar Corporation (Decatur) | Motorola | Type II | Decatur | Macon | 2016-06-06 |
| Caterpillar Corporation (East Peoria) | Motorola | Type II | East Peoria | Multi-County [2] | 2014-06-25 |
| Caterpillar of Delaware (Peoria IL LTR) | LTR | Standard | East Peoria | Tazewell | 2020-10-13 |
| Celanese Emulsions (Meredosia) | LTR | Standard | Meredosia | Morgan | 2020-08-30 |
| Celanese Emulsions (Meredosia) | LTR | Standard | Meredosia | Morgan | 2016-12-28 |
| Champaign City Services - 800 MHz | Motorola | Type II Smartnet | Champaign | Champaign | 2011-11-07 |
| Chicago 2-Way - UHF | LTR | Standard | Chicago | Cook | 2018-07-30 |
| Chicago Communications Nr 1 | LTR | Standard | Chicago | Cook | 2018-07-21 |
| Chicago Midway Airport - Department of Aviation - UHF-T | Motorola | Type II SmartZone | Chicago | Cook | 2021-02-10 |
| Chicago O'Hare Airport Public Safety | Motorola | Type II Smartnet | Chicago | Cook | 2022-03-22 |
| Chicago Office of Emergency Management and Communications | Motorola | Type II Smartnet | Chicago | Cook | 2017-03-31 |
| Chicago Public Safety and Services | Motorola | Type II Smartnet | Chicago | Cook | 2017-11-10 |
| Chrysler Plant (Belvidere) | Motorola | Type II | Belvedere | Boone | 2013-03-26 |
| Clear Talk -- Illinois Cooperative Association | Motorola | Type II SmartZone | Areawide | Multi-County [60] | 2020-07-28 |
| CNY Inc. - 800 Mhz (Coles) | LTR | Standard | Charleston | Coles | 2008-05-11 |
| Comcast Cable (Springfield) | LTR | Standard | Springfield | Sangamon | 2014-01-02 |
| ComEd 800 MHz | Project 25 | Phase II | Northern IL | Multi-County [16] | 2023-03-02 |
| Comelec Services (Stephenson) | Motorola | Type I | Cedarville | Stephenson | 2018-07-30 |
| Comlink Wireless (Midway Airport) | Motorola | Type II | Midway Airport | Cook | 2018-05-17 |
| Comlink Wireless (Posen) | LTR | Passport | Posen | Cook | 2018-07-30 |
| Commonwealth Edison / Exelon | Motorola | Type II SmartZone Omnilink | Various | Multi-County [22] | 2017-03-18 |
| Communications Direct (Chicago Soldier Field) | LTR | Standard | Chicago | Cook | 2016-05-15 |
| Communications Unlimited (Chicago) | Motorola | Type II Smartnet | Cook County | Cook | 2015-12-02 |
| Cook County Dept. of Corrections | Motorola | Type II Smartnet | Chicago | Cook | 2004-10-15 |
| Cook County Sheriff's Department (P25) | Project 25 | Phase I | Chicago | Cook | 2011-03-23 |
| Cook County Sheriff/Corrections | Motorola | Type II SmartZone | Cook County | Cook | 2018-07-24 |
| Craig, Larry/NexTel (Taylorville) | LTR | Standard | Taylorville | Christian | 2013-05-20 |
| Datatronics (Metro St. Louis) | LTR | Standard | Collinsville | Multi-County [4] | 2018-07-30 |
| Decatur Correctional Center - IDOC (Macon) | Motorola | Type II | Argenta | Macon | 2010-08-02 |
| Decatur Macon County Public Safety | Motorola | Type II Smartnet | Decatur | Macon | 2018-07-20 |
| Dixon Correctional Center - IDOC (Lee) | Motorola | Type II Smartnet | Dixon | Lee | 2016-05-27 |
| DuPage County DWIN Public Safety P25 | Project 25 | Phase I | Simulcast | DuPage | 2010-08-02 |
| Dwight Correctional Center - IDOC (Livingston) | Motorola | Type II Smartnet | Dwight | Livingston | 2013-07-20 |
| Effingham County E911 | Motorola | Type II Smartnet | Effingham | Effingham | 2018-07-10 |
| Elgin Public Safety Public Works | Motorola | Type II Smartnet | Elgin | Kane | 2018-07-20 |
| Emery's Two Way Communications (So IL) | LTR | Standard | Marion/Vienna | Multi-County [2] | 2018-07-30 |
| ESP Leasing Corporation - 800 MHz (Chicago) | LTR | Standard | Chicago | Cook | 2006-09-29 |
| ESP Wireless 1 - 900 MHz (Chicago) | Motorola | Type II | Chicago | Cook | 2021-02-03 |
| ESP Wireless/Champion Communications - UHF (Lake Zurich) | LTR | Standard | Lake Zurich | Lake | 2018-07-30 |
| Ferrari Equipment (Cook/Kendall) | Motorola | Type II | Chicago/Minooka | Multi-County [2] | 2018-07-30 |
| First Student (Darien) | LTR | Standard | Darien | DuPage | 2018-07-30 |
| Ford Communications - Chicago | Motorola | Type II Smartnet | Chicago | Cook | 2006-01-29 |
| General Communications (Rockford) | LTR | Standard | Rockford | Winnebago | 2023-01-10 |
| Global Brass and Copper / Olin Brass (East Alton) | EDACS | Standard | East Alton | Madison | 2020-07-25 |
| Global Technical Systems (NID-14 Central IL) | NXDN | NEXEDGE 9600 | Jacksonville | Multi-County [8] | 2015-03-09 |
| Harrahs Joliet Casino and Hotel | LTR | Standard | Joliet | Will | 2021-09-29 |
| Hill Radio (Bloomington) | LTR | Standard | Bloomington | McLean | 2019-08-18 |
| Hudson Fuels - O'Hare | Motorola | Type II | Chicago | Cook | 2022-09-01 |
| i2way Corporation (Rock Island) | LTR | Standard | Rock Island | Rock Island | 2018-07-30 |
| IE Communications (KLL/RFS) - UHF (Staunton) [Deprecated] | LTR | Standard | Staunton | Multi-County [4] | 2018-07-20 |
| Illinois Central College | DMR | Hytera XPT | Various | Tazewell | 2021-04-27 |
| Illinois Department of Corrections -- Graham CC (Hillsboro) [Deprecated] | Motorola | Type II | Hillsboro | Montgomery | 2013-07-16 |
| Illinois Department of Corrections -- Rushville IVC | Motorola | Type II | Rushville | Schuyler | 2018-07-13 |
| Illinois State Police - District Chicago EDACS - 800 MHz | EDACS | Networked Standard | Chicago | Cook | 2008-01-23 |
| Industrial Coop (Springfield) [Deprecated] | LTR | Standard | Springfield | Sangamon | 2018-07-20 |
| Innotech Communications | LTR | Standard | Bloomington | McLean | 2005-08-24 |
| Insight Communications Midwest (Rockford) | LTR | Standard | Loves Park | Winnebago | 2017-09-29 |
| John Deere - System 112 | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [2] | 2021-09-14 |
| Joint National Capital Region (National Geospatial-Intelligence Agency) | Project 25 | Phase I | Various | Multi-County [4] | 2012-10-27 |
| Joliet Public Safety | Motorola | Type II Smartnet | Joliet | Will | 2012-11-21 |
| KanCom - Kankakee City/County Public Safety | Motorola | Type II Smartnet | Kankakee | Kankakee | 2020-06-03 |
| Kewanee Illinois Youth Center - IDOC (Henry) | Motorola | Type II Smartnet | Kewanee | Henry | 2015-06-25 |
| Lake County Law/Government | EDACS | Standard | Lake County | Lake | 2016-07-28 |
| Lakeland Communications (Cook County) | LTR | Passport | Posen | Multi-County [3] | 2018-07-30 |
| Lockport Township High School | LTR | Standard | Lockport | Will | 2019-07-18 |
| MediaOne Cable TV (Chicago) | Motorola | Type IIi Hybrid | Chicago | Cook | 2010-03-30 |
| METCOM/EF Johnson - 800 MHz (McLean County) | LTR | MultiNet | Bloomington | McLean | 2008-10-02 |
| Metropolitan Correctional Center Chicago | Motorola | Type II SmartZone | Chicago | Cook | 2023-08-08 |
| Mobex 217 MHz (Chicago) | LTR | Passport | Chicago | Cook | 2015-05-01 |
| Motorola (Schaumburg) | Motorola | Type II SmartZone | Schaumburg | Cook | 2023-06-07 |
| Motorola C and E | Motorola | Type II Smartnet | Chicago | Cook | 2018-07-21 |
| Motorola Experimental 0227 (Chicago) | Motorola | Type II SmartZone | Chicago | Cook | 2018-07-30 |
| Motorola Experimental 1502 (Cook) | Motorola | Type II | Schaumburg | Cook | 2018-07-30 |
| Motorola University Training System (Schaumburg) | Motorola | Type II SmartZone | Schaumburg | Cook | 2018-07-30 |
| Mt Sterling Fire Department (Cass County) | LTR | Standard | Mt Sterling | Multi-County [2] | 2009-06-15 |
| Naperville Public Safety City Services | Motorola | Type II Smartnet | Naperville | DuPage | 2018-07-20 |
| Nextel (Bloomington) | Motorola | Type I | Bloomington | McLean | 2007-02-20 |
| Nextel (Carbondale) | Motorola | Type I | Carbondale | Jackson | 2010-03-30 |
| Nextel (Champaign) | Motorola | Type I | Champaign | Champaign | 2007-02-22 |
| Nextel (Danville) | Motorola | Type I | Danville | Vermilion | 2009-06-15 |
| Nextel (Effingham) | Motorola | Type I | Effingham | Effingham | 2006-04-15 |
| Nextel (Galesburg) | Motorola | Type I | Galesburg | Knox | 2006-02-06 |
| Nextel (Marion) | Motorola | Type I | Marion | Williamson | 2010-03-30 |
| Nextel (Morton) | Motorola | Type I | Morton | Tazewell | 2006-02-06 |
| Nextel (Rock Falls) | Motorola | Type I | Rock Falls | Whiteside | 2010-03-30 |
| Nextel - 800 MHz (Springfield) | Motorola | Type II | Springfield | Sangamon | 2007-02-10 |
| Northeast Illinois Communications Consortium (Will) | OpenSky | 9600 baud | Aurora | Multi-County [2] | 2010-12-03 |
| NorthShore University Health System | LTR | Standard | Evanston | Cook | 2018-02-05 |
| Northwest Central Dispatch - NWCD (Digital) | Motorola | Type II SmartZone | Arlington Heights | Multi-County [3] | 2013-09-11 |
| Northwest Central Dispatch - NWCD Analog (Cook) | Motorola | Type II Smartnet | Hoffman Estates | Cook | 2013-09-11 |
| Northwestern University (Evanston) [Deprecated] | Motorola | Type II Smartnet | Evanston | Cook | 2012-12-21 |
| Novacom (Herod) | LTR | Standard | Herod | Pope | 2006-06-12 |
| Novacom (Herrin) | LTR | Standard | Herrin | Williamson | 2006-06-12 |
| Novacom (LTR) | LTR | Standard | Cobden | Multi-County [12] | 2019-12-08 |
| Novacom (Mt Vernon) | LTR | Standard | Mt Vernon | Jefferson | 2006-06-12 |
| Overturf Communications (Ava) | Motorola | Type I | Ava | Jackson | 2018-07-30 |
| P.E.C. Mobile Communications | LTR | Standard | Central IL | Multi-County [18] | 2020-07-30 |
| Pace Suburban Bus Service (Chicago) | Motorola | Type II Smartnet | Metropolitan Chicago | Multi-County [6] | 2015-05-01 |
| Peoria County Illinois ETSB (P25) | Project 25 | Phase I | Peoria | Multi-County [2] | 2019-01-10 |
| Phillips 66 Wood River Refinery | Motorola | Type II Smartnet | Roxana | Madison | 2017-01-13 |
| Pontiac Correctional Center - IDOC (Pontiac) | Motorola | Type II Smartnet | Pontiac | Livingston | 2013-04-20 |
| Prairie Material Sales (Metro Chicago) | LTR | Standard | Various | Multi-County [3] | 2021-09-16 |
| Quaker Oats Company (Danville) | Motorola | Type II | Danville | Vermilion | 2014-10-12 |
| Quincy 2-Way Communications | LTR | Standard | Quincy | Multi-County [3] | 2023-10-09 |
| RACOM Network | EDACS | Networked Standard | Various | Multi-County [41] | 2022-10-31 |
| RadiLink (Chicago) | LTR | Passport | Chicago | Cook | 2021-09-15 |
| RadiLink (Lockport) | LTR | Standard | Lockport | Will | 2016-08-31 |
| Ragan Communications - 800 MHz (Dunlap) | EDACS | Standard | Dunlap | Multi-County [3] | 2010-04-10 |
| Ragan Communications - 800 MHz (Washington/CC) | LTR | Standard | Washington/Creve Coeur | Multi-County [2] | 2010-04-10 |
| Rides Mass Transit District (SE IL) | LTR | Standard | Grayville | Multi-County [16] | 2018-07-30 |
| RO Distribution (Makanda) | LTR | Standard | Makanda | Jackson | 2018-07-30 |
| Rush Copley Medical Center (Aurora) | LTR | Standard | Aurora | Kane | 2018-07-30 |
| Schaumburg Public Safety | Motorola | Type II Smartnet | Schaumburg | Cook | 2013-09-11 |
| Scott Air Force Base VHF | Motorola | Type II SmartZone | Mascoutah | St. Clair | 2014-11-07 |
| Sinclair, Raymond (MetroEast StL) | LTR | Standard | Dorsey | Multi-County [3] | 2015-06-09 |
| Sitco (MetroEast IL) | LTR | Standard | Caseyville | Multi-County [4] | 2016-08-31 |
| Sitco (Randolph County IL) | EDACS | Standard | Eden | Randolph | 2018-07-30 |
| Springfield Fire Public Works / CWLP | Motorola | Type II Smartnet | Springfield | Sangamon | 2018-07-20 |
| St. Louis City Lambert Airport (P25) | Project 25 | Phase II | St Louis City | Multi-County [6] | 2018-07-20 |
| State Farm Insurance | Motorola | Type II Smartnet | Bloomington | McLean | 2014-10-15 |
| Stateville Correctional Center - IDOC (Joliet) | Motorola | Type II Smartnet | Joliet | Will | 2013-09-20 |
| Supreme Radio Communications (Bloomington) | LTR | Standard | Bloomington | McLean | 2019-11-29 |
| Supreme Radio Communications (E Peoria/Galesburg) | LTR | MultiNet | East Peoria | Multi-County [11] | 2020-03-31 |
| Tamms Correctional Center - IDOC-SuperMax | Motorola | Type II Smartnet | Tamms | Alexander | 2015-05-23 |
| Tate and Lyle - Decatur IL | Motorola | Type II | Decatur | Macon | 2020-08-02 |
| Three Rivers Casino (Des Plaines IL) | NXDN | NEXEDGE 9600 | Des Plaines | Cook | 2015-10-31 |
| Trueline Communications - UHF (Jacksonville) [Deprecated] | LTR | Standard | Jacksonville | Morgan | 2018-07-20 |
| UNID Project 25 System 73A 747 | Project 25 | Motorola X2-TDMA | Chicago | Cook | 2018-07-20 |
| unidentifed LTR (McLean) | LTR | Standard | McLean | 2018-07-20 | |
| unidentifed LTR - UHF (Macoupin County) | LTR | Standard | unknown | Multi-County [3] | 2018-07-20 |
| unidentified LTR (Springfield) | LTR | Standard | Springfield | Sangamon | 2018-07-20 |
| unidentified Motorola - Springfield IL | Motorola | Type II | Springfield | Sangamon | 2018-07-20 |
| United Airlines (Chicago O'Hare) | Motorola | Type II Smartnet | Chicago | Cook | 2014-10-07 |
| United Parcel Service Sorting Facility (Cook) | Motorola | Type II | Hodgkins | Cook | 2018-07-30 |
| University of Chicago | Project 25 | Phase II | Chicago | Cook | 2021-02-03 |
| US Penitentiary Marion | Motorola | Type II SmartZone | Marion | Williamson | 2013-07-03 |
| VCNA Prairie Illinois (MetroChicago) | Motorola | Type II Smartnet | Chicago Metro Area | Multi-County [3] | 2022-10-28 |
| Walgreens Distribution Center - Edwardsville IL (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Edwardsville IL | Madison | 2019-06-23 |
| Warner Communications - 800 MHz (StL) | LTR | Standard | St. Louis/St. Charles | Multi-County [5] | 2020-07-17 |
| Warner Communications - UHF 14 (Clayton) | LTR | Standard | Clayton | St. Louis | 2020-07-26 |
| Warner Communications - UHF 15 (Clayton/Hillsboro) | LTR | Standard | Clayton | Multi-County [6] | 2020-12-22 |
| Warner Communications - UHF 5 (Caseyville) | LTR | Standard | Caseyville | Multi-County [2] | 2020-08-11 |
| Warner Communications - UHF 6 (Caseyville) | LTR | Standard | Caseyville | Multi-County [6] | 2020-08-11 |
| Warner Communications - UHF A | LTR | Standard | Marlborough | Multi-County [4] | 2020-12-22 |
| Warner Communications - UHF C (St. Louis) | LTR | Standard | St. Louis County | Multi-County [4] | 2019-05-28 |
| Warner Communications 800 LTR (IE StL/So. IL) | LTR | Standard | St. Louis/Southern IL | Multi-County [29] | 2020-08-01 |
| Warner Communications UHF LTR - (IE MetroEast 1-xx) | LTR | Standard | Various | Multi-County [4] | 2021-07-04 |
| Will County (EDACS) | EDACS | Standard | Simulcast | Will | 2021-01-24 |
| Will County River System | Project 25 | Phase I | Joliet | Will | 2017-11-17 |
| Williamson County ETSB/911 | LTR | Standard | Marion | Williamson | 2020-07-20 |
| WirelessUSA (Fairview Heights IL) | Motorola | Type II Smartnet | Fairview Heights | St. Clair | 2018-06-06 |
| WirelessUSA (High Ridge MO) | Motorola | Type II Smartnet | High Ridge | Jefferson | 2020-07-16 |
| WirelessUSA (IL MO) | Motorola | Type II SmartZone Omnilink | St Louis Metro and beyond | Multi-County [24] | 2018-07-20 |
| WirelessUSA (Quincy) (Deprecated) | Motorola | Type II Smartnet | Quincy | Multi-County [8] | 2018-07-20 |
| WirelessUSA (Springfield IL) (Deprecated) | Motorola | Type II | Springfield | Multi-County [14] | 2018-07-20 |
| WirelessUSA - DMR | DMR | Motorola Connect Plus (TRBO) | St Louis Metro Area | Multi-County [14] | 2020-07-26 |
| Wood Communications (Vienna) | LTR | Standard | Vienna | Johnson | 2018-07-30 |
| Yorcom C and R Communications (Oswego) | LTR | Standard | Oswego/Bristol | Kendall | 2022-10-10 |
| Young, William J. - 800 MHz (Champaign) | LTR | Standard | Champaign | Champaign | 2008-02-02 |