| A-Beep - Arlington Heights LTR | LTR | Standard | Arlington Heights | Multi-County [3] | 2018-07-30 |
| A-Beep - Kankakee (UHF) | LTR | Standard | Kankakee | Kankakee | 2018-07-30 |
| A-Beep 800 (Cap+) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Metro Chicago | Multi-County [4] | 2024-12-10 |
| A-Beep Capacity Plus | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2024-10-05 |
| A-Beep Chicago-area LTR | LTR | Standard | Chicago | Multi-County [7] | 2022-10-01 |
| A-Beep LLC - VHF (Kendall Co) | LTR | Standard | Seward Township | Kendall | 2024-02-09 |
| AbbVie/Abbott Laboratories | DMR | Tier 3 Capacity Max | Abbott Park | Lake | 2024-12-12 |
| ADM Alliance Nutrition - Quincy IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Quincy IL | Adams | 2024-01-07 |
| Administrative United States Penitentiary, Thomson | Project 25 | Phase I | Thomson | Carroll | 2019-07-26 |
| AdventHealth Hospitals | DMR | Motorola Capacity Plus Multi Site (TRBO) | Multiple Locations | Multi-County [3] | 2022-09-28 |
| Advocate Christ Medical Center | DMR | Motorola Capacity Plus Multi Site (TRBO) | Oak Lawn | Cook | 2024-08-03 |
| Advocate Condell Medical Center | DMR | Motorola Capacity Plus Multi Site (TRBO) | Libertyville | Lake | 2024-08-16 |
| Advocate Good Samaritan Hospital | DMR | Motorola Capacity Plus Multi Site (TRBO) | Downers Grove | DuPage | 2019-11-26 |
| Advocate Illinois Masonic Medical Center | DMR | Motorola Capacity Plus Multi Site (TRBO) | Chicago | Cook | 2019-11-26 |
| Advocate Lutheral General Hospital | DMR | Motorola Capacity Plus Multi Site (TRBO) | Park Ridge | Cook | 2023-05-21 |
| Advocate Sherman Hospital (Elgin) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Elgin | Kane | 2019-11-26 |
| Advocate South Suburban Hospital | DMR | Motorola Capacity Plus Multi Site (TRBO) | Hazel Crest | Cook | 2024-08-06 |
| Advocate Trinity Hospital | DMR | Motorola Capacity Plus Multi Site (TRBO) | Chicago | Cook | 2019-11-26 |
| Alliant Energy | DMR | Tier 3 Standard | Various | Multi-County [140] | 2024-12-23 |
| Alter Trading (Peoria IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Peoria | Peoria | 2020-07-19 |
| Ameren - Edwards Generation Plant (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Peoria | Peoria | 2020-07-19 |
| Ameren Power Plant - Newton | DMR | Motorola Capacity Plus Single Site (TRBO) | Newton | Jasper | 2022-11-13 |
| AmerenMissouri (P25) | Project 25 | Phase I | St Louis Metro Area/E MO | Multi-County [58] | 2024-11-23 |
| American Airlines (O'Hare) | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2024-06-16 |
| Amgen - Deerfield IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Deerfield | Lake | 2024-07-07 |
| Archer Daniels Midland | DMR | Tier 3 Standard | Decatur | Multi-County [2] | 2024-09-07 |
| Argocy Casino - Alton | LTR | Standard | St Louis | Madison | 2022-10-13 |
| ARINC - O'Hare International Airport - Chicago (DMR 407) | DMR | Motorola Connect Plus (TRBO) | Chicago | Cook | 2024-12-01 |
| Ascension Healthcare | DMR | Motorola Capacity Plus Multi Site (TRBO) | Illinois | Multi-County [3] | 2024-08-27 |
| Ascension Saint Joseph Hospital | DMR | Motorola Capacity Plus Single Site (TRBO) | Joliet | Will | 2022-10-08 |
| Aurora / Naperville Public Safety (OpenSky) | OpenSky | 9600 baud | Aurora | Multi-County [4] | 2020-09-28 |
| Aurora University | DMR | Motorola Capacity Plus Single Site (TRBO) | Aurora | Kane | 2022-11-07 |
| Aux Sable Liquid Products | DMR | Motorola Capacity Plus Single Site (TRBO) | Morris | Grundy | 2016-06-21 |
| Avis / Budget Car Rental | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2018-09-28 |
| Bandt Communications (Rockford) | LTR | Standard | Rockford | Winnebago | 2023-01-12 |
| Barbeck Communications (DMR) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Central IL | Multi-County [4] | 2022-11-22 |
| Bayer Illinois Production - Illiopolis | DMR | Motorola Capacity Plus Single Site (TRBO) | Illinopolis | Sangamon | 2022-10-16 |
| Beardstown School District 15 (IL) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Beardstown | Cass | 2023-12-07 |
| Big River Resources (Galva IL) | DMR | Hytera XPT | Galva | Henry | 2020-07-15 |
| Blackstone Hotel | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2019-06-24 |
| Blessing Health System (IL) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Western | Multi-County [2] | 2023-11-07 |
| BP Products North America | Project 25 | Phase II | Various | Lake | 2024-07-11 |
| Brookfield Zoo (Chicago Zoological Society) | DMR | Motorola Capacity Plus Single Site (TRBO) | Brookfield, IL | Cook | 2023-05-23 |
| Cabot Cab-O-Sil Division | DMR | Motorola Capacity Plus Single Site (TRBO) | Tuscola IL | Douglas | 2022-09-07 |
| Cargill - Bloomington IL (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Bloomington | McLean | 2023-05-01 |
| Carle BroMenn Medical Center | DMR | Motorola Capacity Plus Single Site (TRBO) | Normal | McLean | 2022-11-02 |
| Carle Eureka Hospital | DMR | Motorola Capacity Plus Single Site (TRBO) | Eureka | Woodford | 2024-10-05 |
| Carlisle Syntec (Greenville IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Greenville | Bond | 2024-09-26 |
| Caterpillar Corporation (DMR) | DMR | Motorola Connect Plus (TRBO) | Decatur | Multi-County [4] | 2023-11-13 |
| Centralia Correctional Center - IDOC | Motorola | Type II Smartnet | Centralia | Multi-County [2] | 2021-07-13 |
| Champaign County Community Unit School District 4 (IL) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Champaign | Champaign | 2024-11-08 |
| Champaign County METCAD MDICE | Project 25 | Phase I | Champaign | Champaign | 2022-09-03 |
| Chicago Cubs Baseball - Wrigley Field (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2024-06-02 |
| Chicago Cultural Center | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2023-10-07 |
| Chicago O'Hare Airport Operations | Motorola | Type II SmartZone | Chicago | Cook | 2022-03-22 |
| Chicago O'Hare Airport TETRA | TETRA | Standard | Chicago | Cook | 2022-03-22 |
| Chicago OEMC Public Safety - 800 MHz P25 | Project 25 | Phase II | Chicago | Cook | 2024-10-28 |
| Citgo Refinery (Romeoville) | Motorola | Type II | Romeoville | Will | 2023-02-02 |
| Citgo Refinery - Romeoville (Cap+) | DMR | Motorola Capacity Plus Single Site (TRBO) | Romeoville | Will | 2024-04-22 |
| City of Batavia | DMR | Motorola Capacity Plus Multi Site (TRBO) | Batavia | Kane | 2024-02-16 |
| CK Communications (DMR) | DMR | Conventional Networked | Nokomis | Montgomery | 2024-11-08 |
| Clark County Public Safety (IL) | NXDN | NEXEDGE 4800 | Martinsville | Clark | 2024-09-27 |
| Clear Talk (Connect Plus) | DMR | Motorola Connect Plus (TRBO) | Areawide | Multi-County [35] | 2024-09-26 |
| Clear Talk (Tier 3) | DMR | Tier 3 Standard | Multiple | Multi-County [25] | 2022-11-03 |
| CNY (Central/Eastern IL) | LTR | Standard | Various | Multi-County [11] | 2024-09-20 |
| CNY - Southwest IL | LTR | Standard | Various | Multi-County [6] | 2024-10-22 |
| Com-Rad (Chicago) | LTR | Standard | Chicago | Cook | 2023-08-22 |
| ComEd | Project 25 | Phase I | Northern IL | Multi-County [19] | 2024-03-08 |
| Comlink Wireless (Metro Chicago Passport) | LTR | Standard and Passport | Chicago | Multi-County [4] | 2018-04-22 |
| Comlink Wireless (NXDN-61) | NXDN | NEXEDGE 4800 | Various | Multi-County [6] | 2024-10-09 |
| Comlink Wireless/Chicago Equipment Company (Metro Chicago) | LTR | Standard | Metro Chicago | Multi-County [5] | 2021-02-04 |
| Communications Direct (Chicago Soldier Field) | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2024-06-03 |
| Communications Services (Alton) | LTR | Standard | Alton | Madison | 2024-08-16 |
| Cook County Administration Building | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2019-04-24 |
| Cook DuPage Transportation | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2021-02-03 |
| Costco Wholesale Distribution Center - Morris | DMR | Motorola Capacity Plus Single Site (TRBO) | Morris | Grundy | 2018-07-21 |
| Craig Antenna Service (Central IL) | LTR | Standard | Harristown | Multi-County [3] | 2024-11-20 |
| Dairyland Power Cooperative | DMR | Tier 3 Capacity Max | Various | Multi-County [44] | 2024-11-17 |
| Dart Container Corporation | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2020-12-08 |
| Deere and Company - DMR (IL/IA) | DMR | Motorola Connect Plus (TRBO) | Multiple | Multi-County [3] | 2024-04-21 |
| DeKalb County Public Safety | Project 25 | Phase II | Multiple | DeKalb | 2024-10-24 |
| Delta Airlines (O'Hare Airport) | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2022-10-21 |
| Diga-Talk | NXDN | NEXEDGE 4800 | Various | Multi-County [86] | 2024-09-24 |
| Dominican Sisters Sacred Heart Convent of Springfield | DMR | Motorola Capacity Plus Single Site (TRBO) | Springfield | Sangamon | 2024-10-22 |
| E and S Communications (Tazewell) | NXDN | Icom IDAS Type D | Pekin | Tazewell | 2015-03-03 |
| Eagle Ridge Inn and Resort (Galena) | LTR | Standard | Galena | Jo Daviess | 2024-11-23 |
| East Moline School District 37 | NXDN | Icom IDAS Type D | East Moline | Rock Island | 2019-12-15 |
| EE Etherton Farms | DMR | Motorola Capacity Plus Single Site (TRBO) | Buffalo | Sangamon | 2024-10-22 |
| Egyptian Electric Cooperative (S IL) | DMR | Conventional Networked | Steeleville | Multi-County [8] | 2020-11-05 |
| Electronic Engineering (Davenport) | LTR | Standard | Davenport | Multi-County [2] | 2024-06-24 |
| Endeavor Health | DMR | Motorola Capacity Plus Multi Site (TRBO) | Various | Multi-County [2] | 2024-05-05 |
| Equistar Chemicals - Tuscola IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Tuscola | Douglas | 2024-11-13 |
| Equistar Chemicals LP | DMR | Motorola Connect Plus (TRBO) | Morris | Grundy | 2016-09-05 |
| Erickson Communications (Chicago) | LTR | Standard | Chicago | Cook | 2015-05-03 |
| ESP Wireless - UHF (Chicago Sears 1) | LTR | Standard | Chicago | Cook | 2021-02-01 |
| ESP Wireless - UHF (Chicago Sears 2) | LTR | Standard | Chicago | Cook | 2022-03-24 |
| ESP Wireless 3 - 900 MHz (Chicago) | LTR | Standard | Chicago | Multi-County [5] | 2018-07-19 |
| ESP Wireless/Champion Communications (Mokena) | LTR | Standard | Mokena | Will | 2021-03-31 |
| ESP Wireless/Champion Communications - UHF (Aurora) | LTR | Standard | Aurora | Kane | 2024-01-29 |
| Exxon Communications (Will) | Motorola | Type II | Channahon | Will | 2021-04-12 |
| FCA US (Belvidere) | DMR | Motorola Capacity Plus Single Site (TRBO) | Belvidere | Boone | 2024-09-18 |
| Federal Correctional Institution Greenville | Motorola | Type II SmartZone | Greenville | Bond | 2024-05-27 |
| Federal Correctional Institution Marion | Motorola | Type II | Marion | Williamson | 2021-07-06 |
| Federal Correctional Institution Pekin | Motorola | Type II Smartnet | Pekin | Tazewell | 2014-04-30 |
| FedEx - O'Hare International Airport (DMR) | DMR | Motorola Connect Plus (TRBO) | Chicago | Cook | 2024-02-13 |
| Ferrero USA (Bloomington IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Bloomington | McLean | 2020-11-21 |
| First Student - St. Louis (LTR) | LTR | Standard | St. Louis | Multi-County [4] | 2024-08-26 |
| FleetTalk (Midwest) | NXDN | NEXEDGE 4800 | Various | Multi-County [21] | 2024-07-28 |
| Flint Hills Resources/ESP Wireless (Channahon) | LTR | Standard | Channahon | Will | 2012-07-03 |
| Ford Plant (Chicago Heights) | Motorola | Type II Smartnet | Chicago Heights | Cook | 2022-01-09 |
| Ford Plant (Chicago) | Motorola | Type II Smartnet | Chicago | Cook | 2022-05-15 |
| Fox Valley Park District - Aurora IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Aurora | Kane | 2024-10-06 |
| Franklin County Sheriff (IL) | DMR | Conventional Networked | Multiple | Franklin | 2024-10-24 |
| Galesburg Communications (Knox) | LTR | Standard | Galesburg | Knox | 2020-10-16 |
| Gateway Energy and Coke (Granite City) | DMR | Motorola Capacity Plus Single Site (TRBO) | Granite City | Madison | 2021-07-04 |
| Gillespie Community Unit School District 7 | LTR | Standard | Gillespie | Macoupin | 2021-10-14 |
| Global Technical Systems (Jacksonville) | LTR | Standard | Jacksonville | Morgan | 2021-06-13 |
| Golden Nugget (Danville) | DMR | Motorola Capacity Plus Single Site (TRBO) | Danville | Vermilion | 2024-05-30 |
| Gottlieb Memorial Hospital | DMR | Motorola Capacity Plus Single Site (TRBO) | Melrose Park | Cook | 2023-05-04 |
| Great Plains Madison (IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Madison | Madison | 2019-08-31 |
| Great Wolf Lodge (Gurnee) | DMR | Motorola Capacity Plus Single Site (TRBO) | Gurnee | Lake | 2024-12-21 |
| Grundy County Public Safety | Motorola | Type II Smartnet | Grundy County | Grundy | 2018-06-24 |
| Hard Rock Casino Rockford | NXDN | NEXEDGE 4800 | Rockford | Winnebago | 2024-11-23 |
| Heartland Communications (Chicago) | Motorola | Type I | Chicago | Cook | 2018-05-22 |
| Herscher Community Unit School District 2 (DMR) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Herscher | Kankakee | 2024-07-21 |
| Herscher Community Unit School District 2 (LTR) | LTR | Standard | Herscher | Kankakee | 2024-07-21 |
| HSHS St. John's Hospital | DMR | Motorola Capacity Plus Single Site (TRBO) | Springfield | Sangamon | 2024-09-17 |
| Hyatt Regency Chicago | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2016-07-19 |
| Hyatt Regency McCormick Place | DMR | Motorola Capacity Plus Multi Site (TRBO) | Chicago | Cook | 2019-02-03 |
| Illinois Central College (Peoria) | DMR | Conventional Networked | Peoria area | Multi-County [2] | 2022-10-09 |
| Illinois Rural Electric Cooperative | NXDN | NEXEDGE 4800 | Winchester | Multi-County [6] | 2024-08-25 |
| Illinois-Central School Bus (Morris) | LTR | Standard | Morris | Grundy | 2014-01-05 |
| INEOS Acetyls | Project 25 | Phase II | Naperville | DuPage | 2022-09-19 |
| JBS - Beardstown IL | DMR | Motorola Capacity Plus Multi Site (TRBO) | Beardstown IL | Cass | 2022-11-11 |
| Jewel-Osco Distribution Center | DMR | Motorola Capacity Plus Single Site (TRBO) | Melrose Park | Cook | 2024-07-02 |
| Johnston City Police/Fire (IL) | DMR | Conventional Networked | Johnston City | Williamson | 2024-11-08 |
| Joint National Capital Region | Project 25 | Phase I | Various | Multi-County [22] | 2024-12-23 |
| JT Communications (Chicago) | Motorola | Type II Smartnet | Chicago | Cook | 2010-08-02 |
| KIK Custom Products - Danville IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Danville IL | Vermilion | 2022-11-17 |
| Lake Zurich School District 95 | DMR | Motorola Capacity Plus Single Site (TRBO) | Lake Zurich | Lake | 2021-11-18 |
| Lawrenceville Correctional Center - IDOC (Lawrence) | Motorola | Type II Smartnet | Lawrenceville | Lawrence | 2014-01-11 |
| Lewis University (Romeoville) | LTR | Standard | Romeoville | Will | 2023-03-20 |
| Lewis University - Romeoville (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Romeoville | Will | 2023-03-20 |
| Lincoln Correctional Center - IDOC (Logan) | Motorola | Type II Smartnet | Lincoln | Logan | 2020-09-05 |
| Lincoln's ChalleNGe Academy (Rantoul) | DMR | Motorola Capacity Plus Single Site (TRBO) | Rantoul | Champaign | 2024-11-08 |
| Lockport City | LTR | Standard | Lockport | Will | 2021-08-09 |
| Loews Hotel Chicago | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2017-11-25 |
| Louis Dreyfus Commodities (Cahokia Heights IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | East Carondelet | St. Clair | 2021-07-08 |
| Lurie Children's Hospital | DMR | Motorola Capacity Plus Multi Site (TRBO) | Chicago | Cook | 2024-09-27 |
| MacNeil Automotive Products (dba WeatherTech) | DMR | Motorola Capacity Plus Single Site (TRBO) | Bolingbrook | Will | 2020-05-29 |
| Madison County Transit District (MCT) | EDACS | Standard | Edwardsville | Madison | 2020-09-27 |
| Marion City Police/Public Works | LTR | Standard | Marion | Williamson | 2020-08-13 |
| Marion County ETSB/911 | LTR | Standard | Salem | Marion | 2013-01-20 |
| Marshall County Public Safety (IL) | DMR | Conventional Networked | Various | Marshall | 2022-07-14 |
| Melrose Park Village Government (IL) | DMR | Tier 3 Standard | Melrose Park | Cook | 2024-12-06 |
| Memorial Health System - Springfield IL (NID-394) | NXDN | NEXEDGE 4800 | Springfield | Multi-County [3] | 2024-09-18 |
| Menard Correctional Center - IDOC (Randolph) | Motorola | Type II Smartnet | Chester | Randolph | 2014-01-04 |
| Metro Water Reclamation District of Greater Chicago | EDACS | Narrowband | Chicago | Cook | 2021-06-03 |
| Metropolitan Correctional Center Chicago (P25) | Project 25 | Phase I | Chicago | Cook | 2023-08-02 |
| Metropolitan Pier and Exposition Authority (Chicago) | Project 25 | Phase I | Chicago | Cook | 2024-05-31 |
| Microsoft Data Center | DMR | Motorola Capacity Plus Multi Site (TRBO) | Northlake, Elk Grove Vill | Cook | 2020-03-10 |
| Mid American Energy | MPT-1327 | Standard | Various | Multi-County [23] | 2015-11-11 |
| Millennium Park | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2023-11-09 |
| Miner Electronics (Kankakee) | LTR | Passport | Bradley | Kankakee | 2011-06-13 |
| Missouri BrandMeister DMR | DMR | Conventional Networked | Various | Multi-County [37] | 2024-10-19 |
| Missouri Statewide Wireless Interoperable Network (MOSWIN) | Project 25 | Phase II | Statewide | Multi-County [4] | 2024-12-20 |
| MJM Electric Cooperative | DMR | Conventional Networked | Carlinville | Multi-County [7] | 2021-08-15 |
| Mobile Radio Specialists (White) | LTR | Standard | Burnt Prairie | White | 2010-11-10 |
| Moline IL Public Works | NXDN | Icom IDAS Type D | Moline | Rock Island | 2024-02-28 |
| Motorola (Schaumburg DMR) | DMR | Tier 3 Standard | Schaumburg | Cook | 2023-06-07 |
| Motorola Federal Solutions | Project 25 | Phase II | Various | Multi-County [8] | 2024-12-09 |
| Mount Sinai Hospital | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2021-02-24 |
| Mt Vernon IL Public Safety | DMR | Conventional Networked | Mt Vernon | Jefferson | 2022-10-29 |
| Mt Vernon IL Public Works | DMR | Conventional Networked | Mt Vernon | Jefferson | 2022-05-30 |
| Nestle | DMR | Motorola Capacity Plus Single Site (TRBO) | Franklin Park | Cook | 2019-03-11 |
| New Trier Township High School District 203 | DMR | Motorola Capacity Plus Multi Site (TRBO) | Northfield, Winnetka | Cook | 2023-04-06 |
| Nokia Solutions and Networks US (Naperville) | LTR | Standard | Naperville | DuPage | 2018-09-12 |
| Norris Electric Cooperative (IL) | DMR | Conventional Networked | Newton | Multi-County [10] | 2022-10-15 |
| North American Lighting - Paris IL | NXDN | Icom IDAS Type D | Paris | Edgar | 2020-08-17 |
| Northwestern University P25 (Evanston) | Project 25 | Phase II | Evanston | Cook | 2023-10-16 |
| Novacom (DMR) | DMR | Conventional Networked | Southern | Multi-County [2] | 2022-10-01 |
| NTN Bower - Macomb IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Macomb | McDonough | 2022-11-08 |
| Paging Network of Illinois (Chicago) | Motorola | Type II Smartnet | Chicago | Cook | 2015-05-02 |
| Par-a-Dice Casino and Hotel | DMR | Motorola Capacity Plus Single Site (TRBO) | East Peoria | Tazewell | 2024-12-22 |
| Peoples Gas Light and Coke - Fisher IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Fisher | Champaign | 2021-02-15 |
| Peoria Disposal Company | LTR | Standard | Groveland | Multi-County [2] | 2020-08-04 |
| Pepperidge Farm | DMR | Motorola Capacity Plus Single Site (TRBO) | Downers Grove | DuPage | 2019-01-29 |
| Phillips 66 Refineries | Project 25 | Phase II | Various | Multi-County [12] | 2024-11-24 |
| PPG Industries - Mount Zion IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Mount Zion | Macon | 2022-11-03 |
| Prairie State Energy - Marissa IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Marissa | Washington | 2021-07-06 |
| Princeton IL Government | DMR | Conventional Networked | Princeton | Bureau | 2022-10-30 |
| Putnam County | DMR | Conventional Networked | Multiple | Putnam | 2023-07-08 |
| Quaker Oats Company (Danville) | DMR | Motorola Capacity Plus Single Site (TRBO) | Danville | Vermilion | 2023-12-18 |
| Radi-Link (Capacity Plus Multi Site) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Chicago | Multi-County [4] | 2022-05-06 |
| Radi-Link (Capacity Plus) | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Multi-County [2] | 2021-11-15 |
| Radi-Link Oakbrook Terrace | DMR | Motorola Capacity Plus Single Site (TRBO) | Oakbrook Terrace | DuPage | 2019-12-30 |
| RadiLink (Oak Brook/Chicago) | LTR | Standard | Oak Brook/Chicago | Multi-County [4] | 2017-02-01 |
| Reynolds Consumer Products - Jacksonville IL (DMR) | DMR | Motorola Capacity Plus Single Site (TRBO) | Jacksonville | Morgan | 2022-11-03 |
| Rides Mass Transit District (DMR) | DMR | Conventional Networked | Southern IL | Multi-County [19] | 2024-12-17 |
| Rivers Casino Des Plaines (NID 130) | NXDN | NEXEDGE 4800 | Des Plaines | Cook | 2024-06-16 |
| Rivian Automotive | DMR | Motorola Capacity Plus Multi Site (TRBO) | Normal | McLean | 2023-05-31 |
| Rock River Service Company (Rockford) | LTR | Standard | Rockford | Winnebago | 2023-01-11 |
| Rock Valley College (Rockford) | LTR | Standard | Rockford | Winnebago | 2013-07-06 |
| Rockford MetroCentre (Winnebago) | LTR | Standard | Rockford | Winnebago | 2013-04-30 |
| Roy Walker Communications (DMR) | DMR | Conventional Networked | Makanda | Multi-County [10] | 2021-02-14 |
| SARA Network | Project 25 | Phase II | Various | Multi-County [21] | 2024-12-20 |
| School District 45 (Lombard, Villa Park) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Lombard, Villa Park | DuPage | 2022-11-02 |
| Scott Air Force Base | Project 25 | Phase I | Mascoutah | St. Clair | 2024-08-26 |
| Shawnee Correctional Center -- IDOC (Johnson) | Motorola | Type II | Vienna | Johnson | 2014-01-04 |
| Solae - Gibson City IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Gibson City | Ford | 2022-11-12 |
| Southwest Airlines (Midway) | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2022-07-21 |
| Southwestern Electric Cooperative (IL) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Greenville | Multi-County [5] | 2024-11-30 |
| Southwestern Illinois Digital Group WS9IDG | DMR | Conventional Networked | Shiloh | St. Clair | 2018-07-11 |
| Springfield Fire / Public Works / CWLP (P25) | Project 25 | Phase I | Springfield | Sangamon | 2024-07-04 |
| St. Louis Area Trunked Emergency Radio (SLATER) | Project 25 | Phase I | St Louis Metro Area | Multi-County [6] | 2024-11-29 |
| Star Crystal Communications (Cook) | Motorola | Type II Smartnet | Frankfort | Cook | 2015-05-02 |
| Star Crystal Communications - 900 MHz (Cook) | Motorola | Type II Smartnet | Cook County | Cook | 2010-11-12 |
| STARCOM21 Statewide Illinois | Project 25 | Phase II | Statewide | Multi-County [5] | 2024-12-25 |
| State Farm (Bloomington, IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Bloomington | McLean | 2023-05-31 |
| Stateline Communications (Rockford) | LTR | Standard | Rockford | Winnebago | 2010-03-30 |
| Stephens Convention Center (Rosemont) | LTR | Standard | Rosemont | Cook | 2017-02-14 |
| Sterling Community Unit School District 5 | DMR | Motorola Capacity Plus Single Site (TRBO) | Sterling | Whiteside | 2019-10-07 |
| Stroger Hospital | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2018-01-23 |
| Summer Camp Music Fest 2023 | DMR | Motorola Capacity Plus Single Site (TRBO) | Chillicothe | Peoria | 2023-05-28 |
| Supreme Radio Communications (DMR) | DMR | Motorola Capacity Plus Multi Site (TRBO) | Central Illinois | Multi-County [25] | 2024-11-06 |
| Supreme Radio Communications (East Peoria) | Motorola | Type IIi Hybrid | East Peoria | Multi-County [3] | 2018-05-23 |
| Supreme Radio Communications (Knox) | Motorola | Type II | Rio | Knox | 2020-08-04 |
| Swissotel Chicago | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2018-08-20 |
| Target Distribution Centers | NXDN | NEXEDGE 4800 | Multiple | Multi-County [14] | 2024-08-24 |
| Tate and Lyle - Decatur IL (DMR) | DMR | Motorola Connect Plus (TRBO) | Decatur | Macon | 2024-04-28 |
| TeamConnect | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [15] | 2024-04-28 |
| The Joseph Sears School | DMR | Motorola Capacity Plus Single Site (TRBO) | Kenilworth | Cook | 2024-12-22 |
| Touchette Regional Hospital | DMR | Conventional Networked | Cahokia Heights/Centrevil | St. Clair | 2024-09-26 |
| Township High School District 211 | DMR | Motorola Capacity Plus Single Site (TRBO) | Palatine | Cook | 2021-09-29 |
| Township High School District 214 | DMR | Motorola Capacity Plus Multi Site (TRBO) | Northern Cook County | Cook | 2019-10-18 |
| TRBOconnection-TRBOnexus | DMR | Motorola Connect Plus (TRBO) | Various | Multi-County [8] | 2024-10-16 |
| Tri-County Electric Cooperative (IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Mt Vernon IL | Multi-County [5] | 2021-09-29 |
| Twin City Communications (Bloomington) | LTR | Standard | Bloomington | McLean | 2020-09-06 |
| Tyson Foods - Caseyville | DMR | Motorola Capacity Plus Single Site (TRBO) | Caseyville | St. Clair | 2024-03-07 |
| U of I - Abbott Power Plant (IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Champaign | Champaign | 2021-05-16 |
| United Airlines DT3 | DMR | Tier 3 Capacity Max | Various | Multi-County [4] | 2024-09-17 |
| United Facilities (Galesburg IL) | DMR | Motorola Capacity Plus Single Site (TRBO) | Galesburg IL | Knox | 2020-07-19 |
| United Parcel Service | DMR | Motorola Capacity Plus Single Site (TRBO) | Addison | DuPage | 2021-12-01 |
| United Parcel Service - Rockford | DMR | Tier 3 Non-Standard | Rockford | Winnebago | 2024-11-26 |
| United Parcel Service Sorting Facility - Hodgkins IL | DMR | Motorola Capacity Plus Single Site (TRBO) | Hodgkins | Cook | 2021-10-06 |
| United States Department of Defense (14C) | Project 25 | Phase I | Various | Multi-County [62] | 2024-09-10 |
| United States Steel Corporation (Tier 3) | DMR | Tier 3 Non-Standard | Various | Multi-County [3] | 2024-03-17 |
| UnityPoint Health Methodist (Peoria) | DMR | Motorola Capacity Plus Single Site (TRBO) | Peoria | Peoria | 2023-03-29 |
| University of Illinois at Urbana-Champaign Memorial Stadium | DMR | Motorola Capacity Plus Single Site (TRBO) | Urbana | Champaign | 2022-09-03 |
| University of Illinois at Urbana-Champaign Recreation | DMR | Motorola Capacity Plus Single Site (TRBO) | Urbana | Champaign | 2022-10-30 |
| US Army - Rock Island Arsenal | Project 25 | Phase I | Rock Island | Rock Island | 2019-07-14 |
| VEI Communications LTR | LTR | Standard | Multiple | Multi-County [3] | 2015-06-09 |
| Ventronics (Metro Chicago) | LTR | Standard | Metro Chicago | Multi-County [7] | 2022-10-29 |
| Ventronics - DMR (Metro Chicago) | DMR | Motorola Capacity Plus Single Site (TRBO) | Metro Chicago | Kane | 2023-11-04 |
| W Chicago Lakeshore Hotel | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2016-12-29 |
| Warner Communications (DMR 13) | DMR | Tier 3 Standard | St Louis Metro | Multi-County [12] | 2024-03-25 |
| Warner Communications - Shiloh (LTR) | LTR | Standard | MetroEast | Multi-County [2] | 2023-02-06 |
| Warner Communications - St Louis (DMR-UHF) | DMR | Conventional Networked | St Louis | Multi-County [4] | 2024-08-16 |
| Warner Communications-BJC Hospitals (NXDN) | NXDN | NEXEDGE 4800 | St Louis | Multi-County [8] | 2024-11-27 |
| West Aurora School District 129 | DMR | Conventional Networked | Aurora | Kane | 2023-11-07 |
| Wieland Rolled Products / Winchester - East Alton (DMR) | DMR | Motorola Capacity Plus Multi Site (TRBO) | East Alton | Madison | 2023-10-28 |
| Will County Government IL (P25) | Project 25 | Phase II | Joliet | Multi-County [2] | 2024-12-05 |
| Willis Tower | DMR | Motorola Capacity Plus Single Site (TRBO) | Chicago | Cook | 2019-01-27 |
| Wind Creek Casino and Hotel Southland | NXDN | NEXEDGE 4800 | East Hazel Crest | Cook | 2024-12-22 |
| WirelessUSA (Tier 3) | DMR | Tier 3 Non-Standard | IL/MO | Multi-County [14] | 2024-09-20 |
