About Proviso Police Frequencies
- 36 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 15 conventional channels use a digital mode (P25), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: Chicago OEMC Public Safety - 800 MHz P25 (Project 25): 2 talkgroups; Metropolitan Correctional Center Chicago (P25) (Project 25): 6 talkgroups; Northwestern University P25 (Evanston) (Project 25): 1 talkgroup; STARCOM21 Statewide Illinois: 227 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Proviso, start with the Maywood - IntelliRepeater site of STARCOM21 Statewide Illinois, about 2 miles away. Its control channels: 851.75, 852.1625 MHz.
- 213 listed entries are marked encrypted. No scanner can decode encrypted audio.
Cook County channels that also cover Proviso
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 9, Districts 5 22 | 460.0250 In 465.0250 | NAC 264 | P25 Encrypted | KTO317 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 2, District 19 | 460.0500 In 465.0500 | NAC 13A | P25 Encrypted | KAZ996 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 7, Districts 2 3 | 460.0750 In 465.0750 | NAC 303 | P25 Encrypted | KAZ999 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 10, Districts 10 11 | 460.1000 In 465.1000 | NAC 11A | P25 Encrypted | KBA200 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 4, Districts 1 18 | 460.1500 In 465.1500 | NAC 118 | P25 Encrypted | KSJ745 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 8, Districts 4 6 | 460.2000 In 465.2000 | NAC 405 | P25 Encrypted | KAZ997 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 3, Districts 12 14 | 460.2250 In 465.2250 | NAC 330 | P25 Encrypted | KNBJ580 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 11, Districts 20 24 | 460.3750 In 465.3750 | NAC 240 | P25 Encrypted | KUN507 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 6, Districts 7 8 | 460.4000 In 465.4000 | NAC 519 | P25 Encrypted | KBA636 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 12, Districts 15 25 | 460.4250 In 465.4250 | NAC 12C | P25 Encrypted | KAG839 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 13, District 9 | 460.4500 In 465.4500 | NAC 173 | P25 Encrypted | KXV838 |
| Chicago Police Department (CPD) | Chicago Police Department (CPD) – Dispatch – Zone 1, Districts 16 17 | 460.4750 In 465.4750 | NAC 327 | P25 Encrypted | KAZ998 |
| Cook County Sheriff | Patrol South (multicast w/SC21 TG 25087) (99% Enc.) | 155.5350 | NAC 293 | P25 Encrypted | KSA717 |
| Cook County Sheriff | Patrol North (multicast w/SC21 TG 25086) | 155.5950 | NAC 293 | P25 Encrypted | KSA717 |
| Cook County Sheriff Backup | Operations {Auxillary – Band 5)} | 155.6400 In 153.9350 | NAC 293 | P25 | KFM495 |
| Cook County Sheriff | Rebroadcast of 155.535R | 159.0900 | 173.8 PL | FMN | KQ6542 |
| Cook County Sheriff | Interop UHF 2 – ISPERN patch (Full-time) | 453.7500 In 458.7500 | 156.7 PL | FMN | WQLS615 |
| Cook County Suburban Telecommunications Networks (Police) | Net 9 -- Markham Police | 470.8125 In 473.8125 | 114.8 PL | FMN | WQAU714 |
| Glenview Public Safety Dispatch Center | Niles-Morton Grove Police – DIspatch | 470.7125 In 473.7125 | 192.8 PL | FMN | KXE712 |
| Glenview Public Safety Dispatch Center | Grayslake Police – Dispatch | 472.6000 In 475.6000 | 343 DPL | FMN | WQKL254 |
| Southwest Central Dispatch - SWCD (Palos Heights) Unconfirmed | Future | 477.0000 In 480.0000 | 114.8 PL | FMN | WQMY778 |
| Southwest Central Dispatch - SWCD (Palos Heights) Police | Southwest Central Dispatch – SWCD (Palos Heights) Police – Dispatch | 470.8625 In 473.8625 | 114.8 PL | FMN | WIH729 |
| Southwest Central Dispatch - SWCD (Palos Heights) Police | Southwest Central Dispatch – SWCD (Palos Heights) Police – Dispatch | 472.6000 In 475.6000 | 114.8 PL | FMN | WPQI934 |
| Southwest Central Dispatch - SWCD (Palos Heights) Police | Southwest Central Dispatch – SWCD (Palos Heights) Police – Dispatch | 472.6250 In 475.6250 | 114.8 PL | FMN | WPQI934 |
| West Suburban Consolidated Dispatch Center - WestCom (River Forest) Police | West Suburban Consolidated Dispatch Center – WestCom (River Forest) Police – Dispatch (multicast on TG 34401) | 154.8450 In 156.0900 | 162.2 PL | FMN | KSA785 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| 5th District SWAT Team | Operations | 476.8250 In 479.8250 | 365 DPL | FMN | WQIB212 |
| 5th District SWAT Team | Operations | 477.1750 In 480.1750 | 365 DPL | FMN | WQIB212 |
| Chicago Police Department (CPD) | Car-to-Car | 154.6500 | CSQ | FMN | KA5489 |
| Chicago Police Department (CPD) | Citywide | 460.1250 In 465.1250 | 173.8 PL | FMN | KSJ745 |
| Chicago Police Department (CPD) | Citywide | 460.1750 In 465.1750 | 123.0 PL | FMN | KSJ745 |
| Chicago Police Department (CPD) | Citywide | 460.2500 In 465.2500 | 162.2 PL | FMN | KSJ745 |
| Chicago Police Department (CPD) | Citywide | 460.2750 In 465.2750 | 141.3 PL | FMN | KSJ745 |
| Chicago Police Department (CPD) | Citywide | 460.3000 In 465.3000 | 131.8 PL | FMN | KSJ745 |
| Chicago Police Department (CPD) | Citywide | 460.3250 In 465.3250 | 192.8 PL | FMN | KSJ745 |
| Chicago Police Department (CPD) | Citywide | 460.3500 In 465.3500 | 97.4 PL | FMN | KNBM259 |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 153.8150 | 107.2 PL | FMN | KZU879 |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 153.8450 | 107.2 PL | FMN | KQ6542 |
| Cook County Sheriff | Car-to-Car | 153.9050 | 107.2 PL | FMN | KL6889 |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 154.0250 | 173.8 PL | FMN | KZU879 |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel / Emergency Management | 158.8650 | 107.2 PL | FMN | KSA718 |
| Cook County Sheriff | Cook County Sheriff – Alternate | 159.0900 | 107.2 PL | FMN | KSA718 |
| NORCOMM Public Safety Communications / MABAS Division 20 (Franklin Park) | Old Band/Tactical | 155.4900 | 723 DPL | FMN | KEX221 |
| NORCOMM Public Safety Communications / MABAS Division 20 (Franklin Park) | Net 17 Side | 155.6400 | CSQ | FMN | KSA717 |
| NORCOMM Public Safety Communications / MABAS Division 20 (Franklin Park) | Net 17B | 470.8250 In 473.8250 | 192.8 PL | FMN | WPUX844 |
| West Central Consolidated Communications - WC3 (North Riverside) Police Old | West Central Consolidated Communications – WC3 (North Riverside) Police – Tactical Channel | 155.0700 | 179.9 PL | FMN | WRUN399 |
| West Central Consolidated Communications - WC3 (North Riverside) Police | West Central Consolidated Communications – WC3 (North Riverside) Police – Tactical Channel | 159.1050 In 155.6175 | 432 DPL | FMN | WRUN399 |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Cook County Sheriff | Jail, Surveillance | 153.8150 | 173.8 PL | FMN | KZU879 |
| Cook County Sheriff | Courts | 153.8450 | 173.8 PL | FMN | KQ6542 |
| Cook County Sheriff | Jail | 153.8450 | 173.8 PL | FMN | KQ6542 |
| Cook County Sheriff | Jail | 154.0250 | 173.8 PL | FMN | KZU879 |
| Cook County Sheriff | Corrections Vans/Transportation | 158.8650 | 173.8 PL | FMN | KSA718 |
Chicago OEMC Public Safety - 800 MHz P25
Project 25
2 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Interop | Secure Law 7 – Law Enforcement (STARCOM21) | 5930 | 172a | T Encrypted |
| Interop | Secure Law 8 – Law Enforcement (STARCOM21) | 5931 | 172b | T Encrypted |
Metropolitan Correctional Center Chicago (P25)
Project 25
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Operations | Control Center" Announcement" | 1 | 1 | D |
| Operations | Operations | 2 | 2 | D |
| Operations | Internal Control | 3 | 3 | D |
| Operations | Perimeter Control | 4 | 4 | D |
| Operations | Operations | 5 | 5 | D |
| Operations | Operations | 20 | 14 | D |
Northwestern University P25 (Evanston)
Project 25
1 encrypted talkgroup (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| All | All – Dispatch /or/ Car-to-Car (Channel 2) | 23 | 17 | T Encrypted |
STARCOM21 Statewide Illinois
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Cook County Sheriff | Metropolitan Water Reclamation District of Greater Chicago Police | 1776 | 6f0 | D |
| Cook County Sheriff | Metropolitan Water Reclamation District of Greater Chicago Police | 1777 | 6f1 | D |
| Cook County Sheriff | Tactical 25155 | 25155 | 6243 | D |
| Cook County Sheriff | Tactical 25202 | 25202 | 6272 | D |
| Cook County Sheriff | Tactical 25244 | 25244 | 629c | T |
| Cook County Sheriff | University of Chicago Police – Alternate | 34053 | 8505 | D |
| Cook County Sheriff | Harper College Police – Tactical | 34806 | 87f6 | T |
| Cook County Sheriff | Harper College Police – Tactical | 34807 | 87f7 | T |
| Lyons Township Area Communications Center (LTACC) | Operations | 34483 | 86b3 | T |
| Lyons Township Area Communications Center (LTACC) | Operations 34501 | 34501 | 86c5 | D |
| Lyons Township Area Communications Center (LTACC) | Operations 34502 | 34502 | 86c6 | T |
| Lyons Township Area Communications Center (LTACC) | La Grange Park Public Works/Police – Alternate | 34508 | 86cc | T |
| Lyons Township Area Communications Center (LTACC) | Western Springs Public Works/Police – Alternate | 34509 | 86cd | T |
| Municipal Consolidated Dispatch | Municipal Consolidated Dispatch – Tactical Channel | 3985 | f91 | D |
| Municipal Consolidated Dispatch | Municipal Consolidated Dispatch – Tactical Channel | 3988 | f94 | D |
| Cook County Sheriff | Chicago | 25019 | 61bb | T |
| Cook County Sheriff | University of Chicago Police – Alternate | 34047 | 84ff | T |
| Cook County Sheriff | University of Chicago Police – Alternate | 34049 | 8501 | T |
| Cook County Sheriff | University of Chicago – CPD Zone 7/District 3 Patch | 34050 | 8502 | T |
| Cook County Sheriff | University of Chicago Police – Alternate | 34051 | 8503 | T |
| Cook County Sheriff | University of Chicago Police – Alternate | 34052 | 8504 | T |
| Cook County Sheriff | University of Chicago Police – Alternate | 34054 | 8506 | T |
| Municipal Consolidated Dispatch | Municipal Consolidated Dispatch – Dispatch /Operations | 3982 | f8e | D |
| Northwest Central Dispatch | Mutual Aid | 3157 | c55 | T |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 5) | 36965 | 9065 | D |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 7) | 36967 | 9067 | D |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 9) | 36969 | 9069 | D |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 10) | 36970 | 906a | D |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 11) | 36971 | 906b | D |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 13) | 36974 | 906e | D |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 14) | 36975 | 906f | D |
196 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Cook County Sheriff | Cook County Sheriff – Dispatch (TG 36) | 25035 | 61cb | D Encrypted |
| Cook County Sheriff | Patrol-North (multicast w/155.595 $293) | 25086 | 61fe | D Encrypted |
| Cook County Sheriff | Patrol-South (multicast w/155.535 $293) | 25087 | 61ff | D Encrypted |
| Cook County Sheriff | PC – North | 25088 | 6200 | D Encrypted |
| Cook County Sheriff | PC – South | 25089 | 6201 | D Encrypted |
| Cook County Sheriff | Radio | 25090 | 6202 | D Encrypted |
| Cook County Sheriff | Rolling Meadows Court | 25093 | 6205 | D Encrypted |
| Cook County Sheriff | Central Gangs – South | 25107 | 6213 | D Encrypted |
| Cook County Sheriff | South Narcotics – South | 25111 | 6217 | D Encrypted |
| Cook County Sheriff | South Operations | 25112 | 6218 | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Dispatch – Dolton, South Holland PDs | 25126 | 6226 | T Encrypted |
| Cook County Sheriff | ISPERN Patch (Priority) | 25137 | 6231 | D Encrypted |
| Cook County Sheriff | Tactical 25234 | 25234 | 6292 | D Encrypted |
| Cook County Sheriff | Tinley Park Police – Dispatch | 25312 | 62e0 | T Encrypted |
| Cook County Sheriff | University of Chicago Police – Dispatch | 34046 | 84fe | T Encrypted |
| Cook County Sheriff | Harper College Police – Dispatch | 34805 | 87f5 | T Encrypted |
| Lyons Township Area Communications Center (LTACC) | Lyons Township Area Communications Center (LTACC) – Dispatch | 34481 | 86b1 | T Encrypted |
| Cook County Sheriff | 103rd ??? | 25000 | 61a8 | D Encrypted |
| Cook County Sheriff | Administration | 25004 | 61ac | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 25005 | 61ad | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 25007 | 61af | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 25008 | 61b0 | D Encrypted |
| Cook County Sheriff | Bomb Squad – North | 25010 | 61b2 | D Encrypted |
| Cook County Sheriff | Bomb Squad – South | 25011 | 61b3 | D Encrypted |
| Cook County Sheriff Unconfirmed | Bureau | 25013 | 61b5 | D Encrypted |
| Cook County Sheriff | County Tactical | 25023 | 61bf | D Encrypted |
| Cook County Sheriff | County Tactical | 25024 | 61c0 | D Encrypted |
| Cook County Sheriff | Countywide | 25025 | 61c1 | T Encrypted |
| Cook County Sheriff | Countywide | 25026 | 61c2 | T Encrypted |
| Cook County Sheriff | Countywide | 25027 | 61c3 | T Encrypted |
| Cook County Sheriff | Countywide | 25028 | 61c4 | T Encrypted |
| Cook County Sheriff | Countywide | 25029 | 61c5 | T Encrypted |
| Cook County Sheriff | Countywide | 25030 | 61c6 | T Encrypted |
| Cook County Sheriff | South Suburban Emergency Response Team (SSERT) | 25033 | 61c9 | D Encrypted |
| Cook County Sheriff | Emergency Response Team (ERT) | 25037 | 61cd | D Encrypted |
| Cook County Sheriff | Fugitive – North | 25041 | 61d1 | D Encrypted |
| Cook County Sheriff | Fugitive – South | 25042 | 61d2 | D Encrypted |
| Cook County Sheriff | Gangs Countywide | 25043 | 61d3 | D Encrypted |
| Cook County Sheriff | Hostage Barricade Team – North | 25045 | 61d5 | D Encrypted |
| Cook County Sheriff | Hostage Barricade Team – South | 25046 | 61d6 | D Encrypted |
| Cook County Sheriff Unconfirmed | Hot Mon – North | 25051 | 61db | D Encrypted |
| Cook County Sheriff Unconfirmed | Hot Mon – South | 25052 | 61dc | D Encrypted |
| Cook County Sheriff | Internal Affairs | 25053 | 61dd | D Encrypted |
| Cook County Sheriff | Internal Affairs – Court | 25054 | 61de | D Encrypted |
| Cook County Sheriff | Internal Affairs – Community Supervision/Intervention | 25055 | 61df | D Encrypted |
| Cook County Sheriff | Internal Affairs – Department of Corrections | 25056 | 61e0 | D Encrypted |
| Cook County Sheriff | Internal Affairs – Police | 25057 | 61e1 | D Encrypted |
| Cook County Sheriff | Investigations – North | 25062 | 61e6 | D Encrypted |
| Cook County Sheriff | Investigations – South | 25063 | 61e7 | D Encrypted |
| Cook County Sheriff | Narcotics Gangs Countywide | 25071 | 61ef | D Encrypted |
| Cook County Sheriff | Narcotics Countywide | 25072 | 61f0 | D Encrypted |
| Cook County Sheriff | North Gangs – North | 25074 | 61f2 | D Encrypted |
| Cook County Sheriff | North Gangs – South | 25075 | 61f3 | D Encrypted |
| Cook County Sheriff | North Narcotics – North | 25076 | 61f4 | D Encrypted |
| Cook County Sheriff | North Narcotics – South | 25077 | 61f5 | D Encrypted |
| Cook County Sheriff | North Tactical | 25082 | 61fa | D Encrypted |
| Cook County Sheriff | Tactical 25083 | 25083 | 61fb | D Encrypted |
| Cook County Sheriff | Tactical 25084 | 25084 | 61fc | D Encrypted |
| Cook County Sheriff | Tactical 25085 | 25085 | 61fd | D Encrypted |
| Cook County Sheriff | States Attorney Office 26th TS-Countywide | 25094 | 6206 | T Encrypted |
| Cook County Sheriff | States Attorney 26th TS – North | 25095 | 6207 | T Encrypted |
| Cook County Sheriff | States Attorney 26th TS – South | 25096 | 6208 | T Encrypted |
| Cook County Sheriff | States Attorney NSF – Countywide | 25097 | 6209 | T Encrypted |
| Cook County Sheriff | States Attorney NSF – North | 25098 | 620a | T Encrypted |
| Cook County Sheriff | States Attorney NSF – South | 25099 | 620b | T Encrypted |
| Cook County Sheriff | States Attorney SEC Det – Countywide | 25100 | 620c | T Encrypted |
| Cook County Sheriff | States Attorney SP Operations 1 – North | 25101 | 620d | T Encrypted |
| Cook County Sheriff | States Attorney SP Operations 1 – South | 25102 | 620e | T Encrypted |
| Cook County Sheriff | States Attorney SP Operations 2 – North | 25103 | 620f | T Encrypted |
| Cook County Sheriff | States Attorney SP Operations 2 – South | 25104 | 6210 | T Encrypted |
| Cook County Sheriff | Central Gangs – North | 25106 | 6212 | D Encrypted |
| Cook County Sheriff | South Gangs – North | 25108 | 6214 | D Encrypted |
| Cook County Sheriff | South Gangs – South | 25109 | 6215 | D Encrypted |
| Cook County Sheriff | South Narcotics – North | 25110 | 6216 | D Encrypted |
| Cook County Sheriff | South Tactical | 25114 | 621a | D Encrypted |
| Cook County Sheriff | South Tactical | 25115 | 621b | D Encrypted |
| Cook County Sheriff | Special Operations – North | 25116 | 621c | D Encrypted |
| Cook County Sheriff | Special Operations – South | 25117 | 621d | D Encrypted |
| Cook County Sheriff | Tactical 25118 | 25118 | 621e | D Encrypted |
| Cook County Sheriff | Tactical 25119 | 25119 | 621f | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 25130 | 622a | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel – Wedge | 25134 | 622e | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel – North | 25135 | 622f | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel – South | 25136 | 6230 | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 25138 | 6232 | D Encrypted |
| Cook County Sheriff | Cook County Sheriff – Tactical Channel | 25139 | 6233 | D Encrypted |
| Cook County Sheriff | Custodians – North | 25142 | 6236 | D Encrypted |
| Cook County Sheriff | Tactical 25145 | 25145 | 6239 | D Encrypted |
| Cook County Sheriff | Tactical 25146 | 25146 | 623a | D Encrypted |
| Cook County Sheriff | Tactical 25147 | 25147 | 623b | D Encrypted |
| Cook County Sheriff | NRC Task Force | 25148 | 623c | D Encrypted |
| Cook County Sheriff | Tactical 25149 | 25149 | 623d | D Encrypted |
| Cook County Sheriff | Tactical 25151 | 25151 | 623f | D Encrypted |
| Cook County Sheriff | Tactical 25152 | 25152 | 6240 | D Encrypted |
| Cook County Sheriff | Tactical 25153 | 25153 | 6241 | D Encrypted |
| Cook County Sheriff | Tactical 25154 | 25154 | 6242 | D Encrypted |
| Cook County Sheriff | Tactical 25156 | 25156 | 6244 | D Encrypted |
| Cook County Sheriff | Tactical 25157 | 25157 | 6245 | D Encrypted |
| Cook County Sheriff | Tactical 25158 | 25158 | 6246 | D Encrypted |
| Cook County Sheriff | Tactical 25159 | 25159 | 6247 | D Encrypted |
| Cook County Sheriff | Tactical 25160 | 25160 | 6248 | D Encrypted |
| Cook County Sheriff | Tactical 25161 | 25161 | 6249 | D Encrypted |
| Cook County Sheriff | Tactical 25162 | 25162 | 624a | D Encrypted |
| Cook County Sheriff | Tactical 25163 | 25163 | 624b | D Encrypted |
| Cook County Sheriff | Tactical 25164 | 25164 | 624c | D Encrypted |
| Cook County Sheriff | Tactical 25165 | 25165 | 624d | D Encrypted |
| Cook County Sheriff | Tactical 25166 | 25166 | 624e | D Encrypted |
| Cook County Sheriff | Tactical 25167 | 25167 | 624f | D Encrypted |
| Cook County Sheriff | Tactical 25168 | 25168 | 6250 | D Encrypted |
| Cook County Sheriff | Tactical 25169 | 25169 | 6251 | D Encrypted |
| Cook County Sheriff | Tactical 25170 | 25170 | 6252 | D Encrypted |
| Cook County Sheriff | Tactical 25171 | 25171 | 6253 | D Encrypted |
| Cook County Sheriff | Tactical 25172 | 25172 | 6254 | D Encrypted |
| Cook County Sheriff | Tactical 25173 | 25173 | 6255 | D Encrypted |
| Cook County Sheriff | Tactical 25174 | 25174 | 6256 | D Encrypted |
| Cook County Sheriff | Tactical 25175 | 25175 | 6257 | D Encrypted |
| Cook County Sheriff | Tactical 25176 | 25176 | 6258 | D Encrypted |
| Cook County Sheriff | Tactical 25177 | 25177 | 6259 | D Encrypted |
| Cook County Sheriff | Tactical 25178 | 25178 | 625a | D Encrypted |
| Cook County Sheriff | Tactical 25179 | 25179 | 625b | D Encrypted |
| Cook County Sheriff | Tactical 25180 | 25180 | 625c | D Encrypted |
| Cook County Sheriff | Tactical 25181 | 25181 | 625d | D Encrypted |
| Cook County Sheriff | Tactical 25182 | 25182 | 625e | D Encrypted |
| Cook County Sheriff | Tactical 25183 | 25183 | 625f | D Encrypted |
| Cook County Sheriff | Tactical 25184 | 25184 | 6260 | D Encrypted |
| Cook County Sheriff | Statewide | 25185 | 6261 | T Encrypted |
| Cook County Sheriff | Statewide | 25186 | 6262 | T Encrypted |
| Cook County Sheriff | Tactical 25187 (Courts or Jail – 26th / California?) | 25187 | 6263 | D Encrypted |
| Cook County Sheriff | Tactical 25190 (Courts or Jail – 26th / California?) | 25190 | 6266 | D Encrypted |
| Cook County Sheriff | Tactical 25191 (Courts or Jail – 26th / California?) | 25191 | 6267 | D Encrypted |
| Cook County Sheriff | Tactical 25192 (Courts or Jail – 26th / California?) | 25192 | 6268 | D Encrypted |
| Cook County Sheriff | Tactical 25194 (Courts or Jail – 26th / California?) | 25194 | 626a | D Encrypted |
| Cook County Sheriff | Tactical 25195 (Courts or Jail – 26th / California?) | 25195 | 626b | D Encrypted |
| Cook County Sheriff | Tactical 25196 (Courts or Jail – 26th / California?) | 25196 | 626c | D Encrypted |
| Cook County Sheriff | Tactical 25197 (Courts or Jail – 26th / California?) | 25197 | 626d | D Encrypted |
| Cook County Sheriff | Tactical 25201 (Courts or Jail – 26th / California?) | 25201 | 6271 | D Encrypted |
| Cook County Sheriff | Tactical 25229 | 25229 | 628d | D Encrypted |
| Cook County Sheriff | Prairie State College Police | 25316 | 62e4 | T Encrypted |
| Cook County Sheriff | Tactical 29734 | 29734 | 7426 | D Encrypted |
| Cook County Sheriff | Tactical 29845 | 29845 | 7495 | D Encrypted |
| Cook County Sheriff | Tactical 29919 | 29919 | 74df | D Encrypted |
| Cook County Sheriff | Harper College Police – Tactical | 34808 | 87f8 | T Encrypted |
| Lyons Township Area Communications Center (LTACC) | Operations | 34482 | 86b2 | T Encrypted |
| Lyons Township Area Communications Center (LTACC) | 5th District SWAT? | 34484 | 86b4 | T Encrypted |
| Lyons Township Area Communications Center (LTACC) | Operations 34503 | 34503 | 86c7 | T Encrypted |
| Lyons Township Area Communications Center (LTACC) | Operations 34505 | 34505 | 86c9 | D Encrypted |
| Lyons Township Area Communications Center (LTACC) | Lyons Township Area Communications Center (LTACC) – Tactical Channel | 34506 | 86ca | T Encrypted |
| Northwest Central Dispatch | NWCD Police – Tactical | 3066 | bfa | T Encrypted |
| Northwest Central Dispatch | NWCD Police – Tactical | 3067 | bfb | T Encrypted |
| Northwest Central Dispatch | NWCD Police – Tactical | 3068 | bfc | T Encrypted |
| Northwest Central Dispatch | NWCD Police – Tactical | 3069 | bfd | T Encrypted |
| Northwest Central Dispatch | NWCD Police – Tactical | 3070 | bfe | T Encrypted |
| Cook County Sheriff | Academy | 25001 | 61a9 | D Encrypted |
| Cook County Sheriff | Bridgeview Court | 25012 | 61b4 | D Encrypted |
| Cook County Sheriff | Callbox 1 – North | 25014 | 61b6 | D Encrypted |
| Cook County Sheriff | Callbox 1 – South | 25015 | 61b7 | D Encrypted |
| Cook County Sheriff | Callbox 2 – North | 25016 | 61b8 | D Encrypted |
| Cook County Sheriff | Callbox 2 – South | 25017 | 61b9 | D Encrypted |
| Cook County Sheriff | Chicago | 25018 | 61ba | T Encrypted |
| Cook County Sheriff | Northwest Central Dispatch System (NWCDS) | 25032 | 61c8 | D Encrypted |
| Cook County Sheriff Unconfirmed | TEL-CW | 25034 | 61ca | D Encrypted |
| Cook County Sheriff Unconfirmed | Domestic | 25036 | 61cc | D Encrypted |
| Cook County Sheriff | Forest Preserve District Internal Affairs Division – North | 25039 | 61cf | D Encrypted |
| Cook County Sheriff | Forest Preserve District Internal Affairs Division – South | 25040 | 61d0 | D Encrypted |
| Cook County Sheriff Unconfirmed | Harrison | 25044 | 61d4 | D Encrypted |
| Cook County Sheriff | Inspections | 25058 | 61e2 | D Encrypted |
| Cook County Sheriff | Operations | 25070 | 61ee | D Encrypted |
| Cook County Sheriff | North Operations | 25078 | 61f6 | D Encrypted |
| Cook County Sheriff | North Operations | 25079 | 61f7 | D Encrypted |
| Cook County Sheriff | North Operations | 25080 | 61f8 | D Encrypted |
| Cook County Sheriff | North Tactical | 25081 | 61f9 | D Encrypted |
| Cook County Sheriff | Radio | 25091 | 6203 | D Encrypted |
| Cook County Sheriff | Reed Center | 25092 | 6204 | D Encrypted |
| Cook County Sheriff | Skokie Court | 25105 | 6211 | D Encrypted |
| Cook County Sheriff | South Operations | 25113 | 6219 | D Encrypted |
| Cook County Sheriff | Traffic – North | 25120 | 6220 | D Encrypted |
| Cook County Sheriff | Traffic – South | 25121 | 6221 | D Encrypted |
| Cook County Sheriff | Vehicle Services | 25122 | 6222 | D Encrypted |
| Cook County Sheriff | Womens Justice | 25123 | 6223 | D Encrypted |
| Cook County Sheriff | Custodians – South | 25143 | 6237 | D Encrypted |
| Lyons Township Area Communications Center (LTACC) | Operations | 34480 | 86b0 | T Encrypted |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 4) | 36964 | 9064 | D Encrypted |
| Oak Lawn Regional Emergency Communications (ORLEC) | Oak Lawn Regional Emergency Communications (ORLEC) – Alternate (Channel 6) | 36966 | 9066 | D Encrypted |
| West Suburban Consolidated Dispatch Center - WestCom | Operations | 34402 | 8662 | T Encrypted |
| West Suburban Consolidated Dispatch Center - WestCom | Operations | 34404 | 8664 | T Encrypted |
| West Suburban Consolidated Dispatch Center - WestCom | Operations | 34405 | 8665 | T Encrypted |
| Cook County Sheriff | Administration – Court | 25002 | 61aa | D Encrypted |
| Cook County Sheriff | Administration – Jail | 25003 | 61ab | D Encrypted |
| Cook County Sheriff | Adult Probation | 25006 | 61ae | D Encrypted |
| Cook County Sheriff Unconfirmed | HID Jail – North | 25047 | 61d7 | D Encrypted |
| Cook County Sheriff Unconfirmed | HID Jail – South | 25048 | 61d8 | D Encrypted |
| Cook County Sheriff | Juvenile Temporary Detention Center | 25064 | 61e8 | T Encrypted |
| Cook County Sheriff | Juvenile Probation | 25065 | 61e9 | T Encrypted |
| Cook County Sheriff | Juvenile Court | 25066 | 61ea | T Encrypted |
| Cook County Sheriff | Markham Court | 25067 | 61eb | D Encrypted |
| Cook County Sheriff | Maywood Court | 25068 | 61ec | D Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Proviso.
Maywood - IntelliRepeater · STARCOM21 Statewide Illinois
RFSS 5 · Site 5 (hex 5) · about 2 mi away
Control 851.75, 852.1625
Site 1.2 · Melrose Park Village Government (IL)
Site 1 (hex 1) · about 4 mi away
Control 453.1625, 470.3375, 470.9625
Voice 453.3125, 453.3625, 470.425, 470.7625, 471.2875
Cook County - North Simulcast · STARCOM21 Statewide Illinois
RFSS 5 · Site 1 (hex 1) · NAC 141 · about 6 mi away
Control 852.2875, 852.5625, 853.1375, 853.2625
Voice 851.125, 851.175, 851.6125, 851.725, 852.05, 852.2125, 854.1125, 854.6875, 856.1125, 856.5125, 857.1375, 857.1875, 858.0375, 858.5125, 859.1125
What do these numbers mean?
- Control channel
- The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
- Voice
- The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
- Site
- One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
- RFSS (Radio Frequency Sub-System)
- A group of sites run by the same controller. Large Project 25 systems can have several.
- NAC (Network Access Code)
- A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
- Talkgroup
- A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.
Common questions
What frequency do the police use in Proviso?
We do not have a dispatch channel listed specifically for Proviso. County-level dispatch channels in the same county: Chicago Police Department (CPD) 460.0250 MHz (NAC 264); Chicago Police Department (CPD) 460.0500 MHz (NAC 13A); Chicago Police Department (CPD) 460.0750 MHz (NAC 303); Chicago Police Department (CPD) 460.1000 MHz (NAC 11A).