- All in Illinois
- Alton Community Unit School District #11 (IL)
- Aptakisic-Tripp CCSD #102
- Barrington CUSD 220
- Batavia Park District
- Batavia Public Schools District #101
- Beardstown Police Department
- Bellwood School District 88
- Bloomington Normal Airport Authority (IL)
- Boone County Sheriff's Office
- Buffalo Prairie Township
- Cambridge Fire Prot. Dist.
- Carroll County Highway Department
- CCSD 59 (Community Consolidated School District 59)
- Central City School #133
- Central Illinois Public Transit (CEFS)
- Central Unit School District 301
- Champaign County (IL)
- Champaign-Urbana Mass Transit District (IL)
- Channahon Fire Protection District
- Channahon Park District
- Chicago Police Department
- Chicago Public Schools
- Chicago Transit Authority
- Chicago Zoological Society
- Cicero School District 99 (IL)
- City of Alton (IL)
- City of Batavia
- City of Belvidere (IL)
- City of Bloomington (IL)
- City of Bloomington Township (IL)
- City of Chicago
- City of Clinton (IL)
- City of Collinsville (IL)
- City of Colona (IL)
- City of Country Club Hills
- City of Darien (IL)
- City of Darien Public Works
- City of DeKalb (IL)
- City of East Moline (IL)
- City of East Moline Motor pool
- City of East Moline Water & Wastewater
- City of Effingham (IL)
- City of Elgin (IL)
- City of Harvey
- City of Highwood
- City of Homer (AK)
- City of Joliet (IL)
- City of Moline
- City of Naperville (IL)
- City of O'Fallon
- City of Peoria (IL)
- City of Rockford
- City of Rock Island
- City of Springfield (IL)
- City of St. Charles (IL)
- City of Urbana
- City of Wheaton
- City of Wood Dale
- City of Zeigler
- College of DuPage
- Community School District 303
- Community Unit School District 300
- Cook County Government
- Countryside Police Department
- County of Clark (IL)
- County of Kane
- County of Peoria
- County of Vermilion
- Crawford County Sheriff's Office
- CRIS Rural Mass Transit District
- Darien-Woodridge Fire District
- DeKalb County Highway Department (IL)
- Dolton Police Department
- Downers Grove Grade School District 58
- Downers Grove North High School
- DuPage County
- Dupage County Health Deartment
- Elk Grove Village
- Evanston/Skokie School District 65
- Evergreen Park Fire Department
- Forest Preserve District of Kane County
- Forest Preserves of Cook County
- Foss Park District
- Four Rivers Sanitation Authority
- Fox Valley Park District
- Frankfort Fire Protection District
- Fulton County - Sheriff's Department (IL)
- Glenbard Township High School District #87
- Grayslake Community School District 127
- Henry County ETSB
- Hometown Fire Protection District
- Illinois State Association of Counties
- Indian Springs School District 109
- Jackson Charter School
- Jersey County, IL
- Kendall County
- Knox County Sheriff
- Lake County Government Purchasing Division
- Lewis-Joliet University Airport (IL)
- Lisle Woodridge Fire District
- Macon County (IL)
- Madison County Government
- Maercker School District 60
- Marion County (IL)
- McHenry County Asset Allocation
- McHenry County College
- Mclean County Government
- Menard County Highway Department
- Metropolitan Airport Authority of Rock Island County, Illinois
- Minooka Fire Protection District
- Minooka School Dist 201
- Morton Grove School District #70
- Mounds Police Department
- Mundelein Consolidated High School District 120
- Mundelein Elementary School District 75
- National Express
- New Trier Township High School District 203
- Northeast Illinois Regional Commuter Railroad Corporation D/B/A Metra
- Northwest Municipal Conference
- Oak Lawn-Hometown School District #123
- Oak Park & River Forest High School District 200 (IL)
- O'Fallon CC School Dist 90
- Palatine Park District (IL)
- Palos Heights Fire Protection District
- Peoria Public School District 150
- Perry County Highway Department
- Proviso Township HS District 209
- Pulaski County Sheriff Office
- Rescue 1 Paramedics
- Rides Mass Transit District
- Riverside School District 96
- River Trails SD 26
- River Valley Metro Mass Transit District
- Rockford Mass Transit District
- Rockford Park District
- Rock Island County
- Rock Island County Highway Department
- Rock Island County Metropolitan Mass Transit District (MetroLINK)
- Rock Island Forest Preserve
- Rock Island-Milan School District #41
- Roselle School District 12
- Round Lake Area Schools 116
- SANGAMON COUNTY
- Schaumburg Park District
- Shawnee Mass Transit District
- Skokie District 69
- South Central IL Mass Transit District
- South Holland School District 151
- Springfield Metro Sanitary District
- Springfield Public Schools (IL)
- State of Illinois Surplus
- Township District 113
- Township High School District 211
- Township High School District 214
- Tri-County Special Education
- Ullin Police Department
- Urbana & Champaign Sanitary District (IL)
- U.S. Postal Service
- Valley View School District 365U
- Village of Bellwood
- Village of Berkeley
- Village of Cambridge
- Village of Carol Stream
- Village of Coal Valley
- Village of Downers Grove
- Village of Evergreen Park
- Village of Fox River Grove
- Village of Glenview (IL)
- Village of Gurnee
- Village of Hoffman Estates
- Village of Homer Glen
- Village of Homewood
- Village of Lindenhurst
- Village of Machesney Park
- Village of Oak Park
- Village of Orland Park
- Village of Palatine (IL)
- Village of Rantoul
- Village of Rockton
- Village of Roselle
- Village of Roxana
- Village of Savoy
- Village of Schaumburg
- Village of Shiloh
- Village of Stone Park
- Village of Vernon Hills
- Village of Western Springs
- Village of Willow Springs
- Warrenville Fire Protection District
- Will County School District 92
- Winnebago County, Illinois
- Wood Dale Park District
- Woodford County
- Woodford County Sheriff's Office
- Yellowhead Township Road District
