1xxyy - ISTHA (xx = Garage number, yy = Unit number)
113xx - ISTHA Toll Plazas
12xxx - ISTHA
13xxx - ISTHA
14xxx - ISTHA
15xxx - ISP D15 Mobile Radios (xxx = Unit number, 2xx are 'utility' cars, 3xx are 'special units')
16xxx - ISP D15 Portable Radios (xxx = Unit number, 2xx are 'utility' cars, 3xx are 'special units')
18xxx - ISP D15/ISTHA Dispatch Consoles
19xxx - ISP D15/ISTHA Dispatch Consoles
20xxx - St. Clair County
21xxx - St. Clair County
22xxx - St. Clair County
23xxx - St. Clair County
24xxx - St. Clair County
25xxx - St. Clair County
26xxx - St. Clair County
27xxx - St. Clair County
28xxx - Plainfield PD
29xxx - Ogle County
30xxx - Argonne Labs
31xxx - Lee County
32xxx - McHenry County
33xxx - McHenry County
34xxx - McHenry County
35xxx - SoS Units (North)
36xxx - DuPage Water Commission
37xxx - Boone County
380xx - DNR Law Units Mobile Radios (North)
385xx - DNR Law Units Portable Radios (North)
39xxx - MABB Building Security
40xxx - DuPage Forest Preserve PD
42xxx - Henry County
45xxx - IDPH (North)
46xxx - Joliet Junior College PD
68xxx - Metro Water Reclamation District
70xxx - Stephenson County
72xxx - DeKalb PD
73xxx - Knox County
74xxx - Romeoville PD
76xxx - IL Attorney General (North)
78xxx - Wauconda PD
290xxx - Rockford PD
297xxx - Rockford Park District
299xxx - Rockford PD Dispatch Consoles
350xxx - IL Dept. of Corrections (North)
360xxx - IDoT District 1 Units (xxx = Unit number)
361xxx - IDoT (North)
362xxx - IDoT (North)
363xxx - IDoT (North)
367xxx - IDoT (North)
369xxx - IDoT (North)
370xxx - IL Commerce PD (North)
371xxx - IL Commerce PD (North)
400xxx - IEMA (North)
409xxx - Dispatch Centers / Health Dept / MABAS / IESMA
410xxx - Dispatch Centers / Health Dept / MABAS / IESMA
411xxx - Dispatch Centers / Health Dept / MABAS / IESMA
412xxx - Dispatch Centers / Health Dept / MABAS / IESMA
413xxx - McLean County / Normal
414xxx - McLean County Dispatch Centers
415xxx - IEMA Dispatch Consoles
416xxx - ISU PD
417xxx - SoS Units (Middle)
418xxx - IMERT
419xxx - IL National Guard
422xxx - IL Dept. of Revenue
426xxx - IL State Fire Marshal
427xxx - IDPH (Middle)
429xxx - MABAS / USAR TF-1
431xxx - BNSF PD
432xxx - Bloomington PD
433xxx - IL Attorney General (Middle)
600xxx - Springfield PD
609xxx - Springfield PD Dispatch Consoles
610xxx - Sangamon County
619xxx - Sangamon County Dispatch Consoles
628xxx - Decatur PD
630xxx - IL Dept. of Corrections (Middle)
640xxx - IDoT (Middle)
651xxx - Ameren (North)
652xxx - Ameren (North)
653xxx - Ameren (North)
654xxx - Ameren (North)
658xxx - Ameren Dispatch Consoles (North)
660xxx - IEMA (Middle)
670xxx - IL Commerce PD (Middle)
671xxx - IL Commerce PD (Middle)
6800xx - DNR Law Units Mobile Radios (Middle)
6805xx - DNR Law Units Portable Radios (Middle)
700xxx - Madison County
701xxx - Madison County
702xxx - SoS Units (South)
706xxx - Bond County
710xxx - IL Commerce PD (South)
711xxx - IL Commerce PD (South)
7200xx - DNR Law Units Mobile Radios (South)
7205xx - DNR Law Units Portable Radios (South)
740xxx - IEMA (South)
755xxx - Ameren (South)
756xxx - Ameren (South)
758xxx - Ameren Dispatch Consoles (South)
767xxx - IDoT (South)
768xxx - IDoT (South)
769xxx - IDoT (South)
770xxx - IL Dept. of Corrections (South)
793xxx - Troy PD
794xxx - IDPH (South)
803xxx - IL Attorney General (South)
100xxxx - ISP Mobile Radios (North) (xxxx = "ID")
110xxxx - ISP Portable Radios (North) (xxxx = "ID")
111xxxx - ISP Admin Units (North)
1300xxx - ISP Aircraft (North)
13ddxxx - ISP Utility Car (North) (dd = District, 24 = TRT, 74 = Riverboat)
1372xxx - ISP Weigh Stations (North)
13xxxxx - ISP "Other" (North)
140xxxx - ISP Motor Units (North)
1800xxx - ISP Backup Dispatch (North)
19ddpcc - ISP Dispatch Console (North) (dd = District, p = Dispatch Position, cc = Channel)
200xxxx - ISP Mobile Radios (Middle) (xxxx = "ID")
210xxxx - ISP Portable Radios (Middle) (xxxx = "ID")
211xxxx - ISP Admin Units (Middle)
2300xxx - ISP Aircraft (Middle)
23ddxxx - ISP Utility Car (Middle) (dd = District, 24 = TRT, 74 = Riverboat)
2372xxx - ISP Weigh Stations (Middle)
23xxxxx - ISP "Other" (Middle)
240xxxx - ISP Motor Units (Middle)
2800xxx - ISP Backup Dispatch (Middle)
29ddpcc - ISP Dispatch Console (Middle) (dd = District, p = Dispatch Position, cc = Channel)
300xxxx - ISP Mobile Radios (South) (xxxx = "ID")
310xxxx - ISP Portable Radios (South) (xxxx = "ID")
311xxxx - ISP Admin Units (South)
3300xxx - ISP Aircraft (South)
33ddxxx - ISP Utility Car (South) (dd = District, 24 = TRT, 74 = Riverboat)
3372xxx - ISP Weigh Stations (South)
33xxxxx - ISP "Other" (South)
340xxxx - ISP Motor Units (South)
3800xxx - ISP Backup Dispatch (South)
39ddpcc - ISP Dispatch Console (South) (dd = District, p = Dispatch Position, cc = Channel)
572xxxx - Cook County
573xxxx - Cook County
574xxxx - Cook County
575xxxx - Cook County
580xxxx - Cook County (Dispatch Consoles?)
640xxxx - IDoT Portable Scales