Illinois State Police (ISP) (Illinois)

Last Updated: March 30, 2025, 12:02 pm UTC
All Primary Dispatch/Car-to-Car, etc. operations in all troops are on the StarCom21 P25 Digital Trunked Radio System. (since 11/2/07)
See the WIKI for more information on the ISP Troops/Districts (Maps, Coverage areas, Patrol Zones)
Radio Identifiers WIKI       Troop Map - In 2023, ISP switched from 22 districts to 11 Troops MAP     Communications Centers by Troop MAP  

Frequencies

Illinois State Police

Division of Patrol - Statewide

ISP appears to have switched to VHF/800 MHz portables, which changed mobile extenders back to VHF (in areas where portable coverage is not always possible)
ISPERN-Illinois State Police Emergency Radio Network "

Conventional Channels - Frequencies have been moved to the WIKI as they appear to no longer (or ever heard) in use.

STARCOM21 Statewide Illinois
Project 25 Phase II
Main Communications system
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.475KA5825 BM CSQ ISPERN CSQ ISPERN [HF-1] (statewide Rx) FMN Law Dispatch
155.475KN3600 BM 156 DPL ISPERN D156 ISPERN [HF-1] (statewide Tx) FMN Law Dispatch
155.475KA5825 BM 67.0 PL ISPERN 67.0 ISPERN [HF-1] (Some Districts Tx) FMN Law Dispatch
155.475 B 71.9 PL ISPERN 71.9 ISPERN [HF-1] (Districts C, 2, 5, 15, 17, 21) FMN Law Dispatch
155.055KA5825 BM CSQ IREACH CSQ Illinois Radio Emergency Assistance Channel [HF-3] (Legacy/Rx) FMN Interop
155.055KA5825 M 156 DPL IREACH D156 Illinois Radio Emergency Assistance Channel [HF-3] (Tx) FMN Interop
155.460KA5825 BM CSQ ISP S/W HF-4 HF4 - Channel 7 / To Ambulances on 155.34 FMN Law Talk
155.340 M 225.7 PL MERCI1 225.7 Ambulance-to-ISP District for Communicate (District receives this freq) [ISP HF-6] FMN EMS-Tac
155.505KA5825 M CSQ ISP VHF MX CSQ Mobile Extenders to SC21 FMN Law Dispatch
155.505KA5825 M 293 NAC ISP VHF MX N293 Mobile Extenders to SC21 (NAC varies per car) P25 Law Dispatch
173.075WNVD283 BM ISP Lo-Jac Lo Jac / Forensic Services (Metro Chicago) Telm Data
Troop 1 - Rockford

Boone, Carroll, Jo Daviess, Lee, Ogle, Stephenson, Whiteside and Winnebago Counties.
Troop 1 is now patrolling I-88 in Lee and Ogle Counties as well as I-90 in Winnebago County.  Both tollways were formerly patrolled by Troop 15. (1/5/25)

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.680KSA774 B 67.0 PL ISP D1 HF2B (IN USE?) Dispatch: Base-to-Mobiles (Old) STERLING FMN Law Dispatch
154.680KA5825 M 110.9 PL ISP D1 HF2M (IN USE?) Dispatch: Mobiles-to-Base (Old) STERLING FMN Law Dispatch
764.16875WPTZ798 M 155 DPL ISP D1 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) STERLING FMN Law Dispatch
794.16875WPTZ798 M 412 DPL ISP D1 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) STERLING FMN Law Dispatch
155.520KSF947 BM 110.9 PL ISP D16 HF2 (IN USE?) Dispatch [HF-2] (Old) FMN Law Dispatch
764.21875WPTZ798 M 162 DPL ISP D16 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) FMN Law Dispatch
794.21875WPTZ798 M 413 DPL ISP D16 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) FMN Law Dispatch
Troop 2 - Moline

Rock Island, Mercer, Henry, Bureau, Putnam and LaSalle Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.845KSB229 B 67.0 PL ISP D7 HF-2B (IN USE?) VDispatch: Base-to-Mobiles (Old) E MOLINE FMN Law Dispatch
764.21875WPTZ798 M 162 DPL ISP D7 MX-O (IN USE?) VVehicular Repeater/Mobile Extender - Out (to SC21) E MOLINE FMN Law Dispatch
794.21875WPTZ798 M 413 DPL ISP D7 MX-I (IN USE?) VVehicular Repeater/Mobile Extender - In (to SC21) E MOLINE FMN Law Dispatch
155.460KEO371 BM 67.0 PL ISP D17 HF4 67.0 (IN USE?) HF-4 (back-up to Starcom) LaSALLE FMN Law Dispatch
155.445KEO371 BM ISP D17 Alerts (IN USE?) Alerts / Broadcasts (D662/D701?) LaSALLE FMN Law Dispatch
764.46875WPTZ798 M 165 DPL ISP D17 MX-O (IN USE?) Vehicular Repeater - Out (to SC21) LaSALLE FMN Law Dispatch
794.46875WPTZ798 M 423 DPL ISP D17 MX-I (IN USE?) Vehicular Repeater - In (to SC21) LaSALLE FMN Law Dispatch
Troop 3 - Chicago

Cook, McHenry, Lake, DeKalb, Kane, DuPage, Kendall, Will and Grundy Counties.
Troop 3 is now patrolling the portions of tollways I-88, I-90, I-294, I-355 and I-390 in their jurisdiction that were formerly patrolled by Troop 15. (1/5/25)
STARCOM21 usage: See the wiki for more information.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.935KSB242 BM ISP DCh HF-2 (IN USE?) Special Details/Alternate/Back-up D CHICAGO FMN Law Tac
155.460KSB231 BM CSQ ISP S/W HF-4 (IN USE?) Car-to-Car / contact with District 15-Tollways D CHICAGO FMN Law Tac
764.19375WPTZ798 M 156 DPL ISP DCh MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) D CHICAGO FMN Law Dispatch
794.19375WPTZ798 M 412 DPL ISP DCh MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) D CHICAGO FMN Law Dispatch
154.695KSB233 B 67.0 PL ISP D2 HF-2B (IN USE?) Dispatch: Base-to-Mobiles / Scales ELGIN D2 FMN Law Dispatch
154.695KA5825 M 110.9 PL ISP D2 HF-2M (IN USE?) Dispatch: Mobiles-to-Base / Scales ELGIN D2 FMN Law Dispatch
764.19375WPTZ798 M 156 DPL ISP D2 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) ELGIN D2 FMN Law Dispatch
794.19375WPTZ798 M 412 DPL ISP D2 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) ELGIN D2 FMN Law Dispatch
154.920KSB230 BM CSQ ISP D5 HF-2 (IN USE?) Dispatch (Old) D5 JOLIET FMN Law Dispatch
764.21875WPTZ798 M 162 DPL ISP D5 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) D5 JOLIET FMN Law Dispatch
794.21875WPTZ798 M 413 DPL ISP D5 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) D5 JOLIET FMN Law Dispatch
Troop 4 - Peoria

Knox, Stark, Marshall, Peoria, Woodford, Tazewell, Henderson, Warren, Hancock, McDonough, and Fulton Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.695KSA775 B 411 DPL ISP D14 HF2B (IN USE?) Alerts / Broadcasts MACOMB D14 FMN Law Dispatch
764.16875WPTZ798 M 155 DPL ISP D14 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) MACOMB D14 FMN Law Dispatch
794.16875WPTZ798 M 412 DPL ISP D14 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) MACOMB D14 FMN Law Dispatch
155.520KSB228 B 205 DPL ISP D8 HF2B (IN USE?) District 8: Alerts / Broadcasts PEORIA D8 FMN Law Dispatch
764.19375WPTZ798 M 156 DPL ISP D8 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) PEORIA D8 FMN Law Dispatch
794.19375WPTZ798 M 412 DPL ISP D8 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) PEORIA D8 FMN Law Dispatch
Troop 5 - Bloomington

Livingston, McLean, Dewitt, Kankakee, Ford, and Iroquois Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.680KSA776 BM CSQ ISP D6 HF-2 (IN USE?) Dispatch (Old) D6 PONTIAC FMN Law Dispatch
764.16875WPTZ798 M 155 DPL ISP D6 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) D6 PONTIAC FMN Law Dispatch
794.16875WPTZ798 M 412 DPL ISP D6 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) D6 PONTIAC FMN Law Dispatch
764.19375WPTZ798 M 156 DPL ISP D21 MX-Out (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) ASHKUM FMN Law Dispatch
794.19375WPTZ798 M 412 DPL ISP D21 MX-In (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) ASHKUM FMN Law Dispatch
Troop 6 - Springfield

Adams, Schuyler, Brown, Pike, Scott, Mason, Logan, Cass, Menard, Morgan, Sangamon, and Christian Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
764.21875WPTZ798 M 162 DPL ISP D9 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) SPRINGFIELD FMN Law Dispatch
794.21875WPTZ798 M 413 DPL ISP D9 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) SPRINGFIELD FMN Law Dispatch
154.935KNNU245 BM 223 DPL ISP D9 Alerts (IN USE?) District 9: Alerts / Broadcasts SPRINGFIELD FMN Law Dispatch
154.650KA5825 M 754 DPL ISP D9 Mob (IN USE?) Mobile Units (12/16) SPRINGFIELD FMN Law Tac
156.000KS3183 M CSQ ISP D9 U2U (IN USE?) Unit-to-Unit (licensed only to ISP District 9) SPRINGFIELD FMN Law Tac
460.350WQIG495 RM 151.4 PL ISPHQ Maint (IN USE?) ISP Headquarters - Building Maintenance (801 S Seventh - Spfld) FMN Public Works
460.450WQIG495 RM 071 DPL ISPHQ Clean (IN USE?) ISP Headquarters - Maintenance / Janitorial (801 S Seventh - Spfld) FMN Public Works
857.7375WNMF342 B 82.5 PL ICJIA Data (IN USE?) ICJIA Data SPRINGFIELD FM Data
154.680KGY335 B 662 DPL ISP D20 HF-2 (IN USE?) District 20: Alerts / Broadcasts FMN Law Dispatch
764.19375WPTZ798 M 156 DPL ISP D20 MX-Out (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) FMN Law Dispatch
794.19375WPTZ798 M 412 DPL ISP D20 MX-In (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) FMN Law Dispatch
Troop 7 - Champaign

Macon, Piatt, Champain, Vermillion, Shelby, Moutlrie, Douglas, Coles and Edgar Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.695KSA464 B 251 DPL ISP D10 HFB2 (IN USE?) Dispatch: Champaign/Urbana area (no 67.0 PL as of 9/10) PESOTUM FMN Law Dispatch
764.46875WPTZ798 M 165 DPL ISP D10 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) PESOTUM FMN Law Dispatch
794.46875WPTZ798 M 423 DPL ISP D10 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) PESOTUM FMN Law Dispatch
Troop 8 - Collinsville (Metro East)

Calhoun, Greene, Jersey, Macoupin, Montgomery, Madison, Bond, St. Clair, Clinton, Monroe and Washington Counties.
 
155.37 CSQ, Point-to-Point is used for communications with agencies in St Louis MO area (unsure if still used by ISP Troop 8)

ISPERN talkgroup appears to repeat mobile units using TX D156 or 67.0 PL, but not CSQ (6/24) [When acitivated by dispatch] (Base on 155.475 appears to be CSQ as to not feed back into patch]
* When VHF is activated on the talkgroup, only units using D156 transmit appear to multicast on the ISPERN talkgroup.  ISP Dispatch broadcasts as CSQ. (7/24)
700 MHz mobile extenders are no longer be in use, as portable radios are now using VHF-to-700/800 (155.505/151.16 in some areas for MX)

STARCOM21 Statewide Illinois
Project 25 Phase II
Troop 8 dispatchers can communicate with Madison County PSAPs on talkgroup 7323, or with St Clair County PSAPs on talkgroup 7006
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.505KA5825 M 132 NAC ISP VHF MX N132 Mobile Extenders-to-SC21 P25 Law Dispatch
151.160KA2864 M 204 NAC ISP D18 DVRS A Mobile Extenders (to SC21) P25 Law Dispatch
151.160KA2864 M 240 NAC ISP D18 DVRS B Mobile Extenders (to SC21) (Scale) P25 Law Dispatch
154.665KSB235 B 306 DPL ISP D11 Alert (IN USE?) District 11: Alerts / Broadcasts (in use 4/21) FMN Law Dispatch
155.370KSB235 B CSQ ISP Pt-to-Pt Point-to-Point {Link to St Louis / MO State} FMN Law Talk
775.85625WPTZ798 M 61F NAC 7TAC89 61F (IN USE?) Operations (heard Madison Co) P25 Law Tac
764.21875WPTZ798 M 162 DPL ISP D11 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) FMN Law Dispatch
794.21875WPTZ798 M 413 DPL ISP D11 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) FMN Law Dispatch
764.16875WPTZ798 M 155 DPL ISP D18 MX-Out (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) LITCHFIELD FMN Law Dispatch
794.16875WPTZ798 M 412 DPL ISP D18 MX-In (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) LITCHFIELD FMN Law Dispatch
155.445WQEP339 BM 516 DPL ISP D18 HF-2 (IN USE?) Back-Up to STARCOM21 [HF-2] LITCHFIELD FMN Law Dispatch
953.950WQAX857 F ISP D18 MW BvrDm (IN USE?) Microwave Link (Nilwood to Beaver Dam) LITCHFIELD Telm Data
957.550WQAX855 F ISP D18 MW Nilwd (IN USE?) Microwave Link (Beaver Dam to Nilwood) LITCHFIELD Telm Data
Troop 9 - Effingham

Cumberland, Clark, Fayette, Effingham, Jasper, Crawford, Marion, Clay, Richland, Lawrence, Wayne, Edwards, Wabash, Hamilton, and White Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.680KSB236 B 315 DPL ISP D12 HF2A (IN USE?) District 12: Alerts / Broadcasts (in use 6/14) EFFINGHAM FMN Law Dispatch
154.680KSB236 B 412 DPL ISP D12 HF2B (IN USE?) District 12: Alerts / Broadcasts (still in use?) EFFINGHAM FMN Law Dispatch
764.19375WPTZ798 M 156 DPL ISP D12 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) EFFINGHAM FMN Law Dispatch
794.19375WPTZ798 M 412 DPL ISP D12 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) EFFINGHAM FMN Law Dispatch
154.920KSI983 B 624 DPL ISP D19 HF-2 (IN USE?) Alerts / Back-Up to SC21 CARMI FMN Law Dispatch
764.16875WPTZ798 M 155 DPL ISP D19 MX-Out (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) CARMI FMN Law Dispatch
794.16875WPTZ798 M 412 DPL ISP D19 MX-In (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) CARMI FMN Law Dispatch
Troop 10 - Carbondale

Jefferson, Randolph, Perry, Franklin, Jackson, Williamson, Saline, Gallatin, Union, Johnson, Pope, Hardin, Alexander, Pulaski and Massac Counties.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
764.46875WPTZ798 M 165 DPL ISP D13 MX-O (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) DuQUOIN FMN Law Dispatch
794.46875WPTZ798 M 423 DPL ISP D13 MX-I (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) DuQUOIN FMN Law Dispatch
154.935KSB234 B 371 DPL ISP D13 Alert (IN USE?) District 13: Alerts / Broadcasts [HF-2] (was D413) DuQUOIN FMN Law Dispatch
155.505KA5825 M 173 NAC ISP D13 VHF MX (IN USE?) Mobile Extenders (to SC21) (*former DuQuoin D13) P25 Law Dispatch
154.680KSG291 BM 754 DPL ISP D22 HF-2 (IN USE?) District 22: Alerts / Broadcasts FMN Law Dispatch
764.21875WPTZ798 M 162 DPL ISP D22 MX-Out (IN USE?) Vehicular Repeater/Mobile Extender - Out (to SC21) FMN Law Dispatch
794.21875WPTZ798 M 413 DPL ISP D22 MX-In (IN USE?) Vehicular Repeater/Mobile Extender - In (to SC21) FMN Law Dispatch
Troop 15 - Tollway (Downers Grove)

Troop 15 (formerly District 15) has been disbanded.  Troops 1 and 3 are now patroling the tollways in their respective jurisdictions. (1/5/25)

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.695KSB989 BM ISP D15 A2 District 2 (A2) FMN Law Talk
154.935KSB242 BM ISP D15 A3 District 3 (A3) FMN Law Talk
154.680KSB233 BM ISP D15 A4 District 4 (A4) FMN Law Talk
154.920KA5825 BM ISP D15 A5 District 5 (A5) FMN Law Tac
155.520 BM ISP D15 A6 District 16 (A-6) [No License] FMN Law Tac
154.650KA5825 M 754 DPL ISP D15c2cB4 Car-to-Car (B4) FMN Law Tac
Department of Criminal Investigations (DCI)
STARCOM21 Statewide Illinois
Project 25 Phase II
Most comms are on encrypted talkgroups. Dispatch will be heard on Troop talkgroups. VHF use is unknown (2025)
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
154.905KA5825 M CSQ ISP DCI HF-2 Operations [HF-2] FMN Law Tac
154.950KA5825 M CSQ ISP DCI HF-3 Operations [HF-3] FMN Law Tac
154.710KA5825 M CSQ ISP DCI 4.71 Operations FMN Law Tac
154.920KA5825 M CSQ ISP DCI 4.92 Operations FMN Law Tac
(Former) District 25 - TRT - Tactical Response Team
STARCOM21 Statewide Illinois
Project 25 Phase II
Main Communications system; non-dispatch activities are probably encrypted
Illinois Public Safety Agency Network

formerly licensed as Illinois Criminal Justice Information Authority

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
857.7375WQME309 RM IPSAN Flora Mobile Terminal Data - Flora (Clay) (CW-ID) Telm Data
859.7625WQME309 RM IPSAN Lakewd Mobile Terminal Data - Lakewood (Shelby) Telm Data
855.4625WQCP383 RM IPSAN Marion Mobile Terminal Data - Marion (Jefferson) (CSQ) Telm Data
858.4625WQME309 RM IPSAN Newton Mobile Terminal Data - Newton (Jasper) Telm Data
857.7375WNXS419 RM IPSAN Pesotm Mobile Terminal Data - Pesotum (Champaign) Telm Data
856.0625WQME309 RM IPSAN Rochel Mobile Terminal Data - Rochelle (Ogle) Telm Data
855.9625WPMF678 RM ISPAN Danvil Mobile Terminal Data - Danville (Vermilion) Telm Data

Other Law Enforcement

Illinois Department of Natural Resources

See IDNR Page

STARCOM21 Statewide Illinois
Project 25 Phase II
Dispatch / Operations
Secretary of State Police (ISSP)
STARCOM21 Statewide Illinois
Project 25 Phase II
Main Communications system