About Madison County Police Frequencies
- 3 conventional channels use a digital mode (DMR), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 84 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 Madison County, start with the Cherokee Pass/Fredericktown site of Missouri Statewide Wireless Interoperable Network (MOSWIN). Its control channels: 152.03, 155.505 MHz.
- 26 listed entries are marked encrypted. No scanner can decode encrypted audio.
Madison County conventional frequencies
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Madison County Sheriff | Madison County Sheriff – Dispatch – New | 154.7625 In 158.8425 | CC 10 · TG 300 · SL 1 | DMR | WQXZ807 |
| Madison County Sheriff | Madison County Sheriff – Dispatch – Old | 154.7625 In 158.8425 | CC 10 · TG 5 · SL 1 | DMR | WQXZ807 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Madison County Sheriff | Operations | 154.7625 In 158.8425 | CC 10 · TG 4 · SL 1 | DMR | WQXZ807 |
Madison County trunked talkgroups
STARCOM21 Statewide Illinois
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Madison Co. Sheriff/Law/Government | Animal Control – Dispatch (Shelter) | 7301 | 1c85 | D |
| Madison Co. Sheriff/Law/Government | Madison Co. Sheriff/Law/Government – Dispatch | 7315 | 1c93 | D |
| Madison Co. Sheriff/Law/Government | Altermate Dispatch / Car-to-Car | 7316 | 1c94 | D |
| Madison Co.-Alton, Wood River Dispatch | Wood River Police – Dispatch | 7300 | 1c84 | D |
| Madison Co.-Alton, Wood River Dispatch | Alton Police – Dispatch (No Patch) | 7310 | 1c8e | D |
| Madison Co.-Alton, Wood River Dispatch | E Alton/Bethalto Police – Dispatch | 7911 | 1ee7 | D |
| Madison Co.-Edwardsville/SIUE | SIUE Police – Dispatch (w/Dental School) | 7951 | 1f0f | D |
| Madison Co.-Edwardsville/SIUE | Edwardsville Police – Dispatch | 8364 | 20ac | D |
| Madison Co.-Edwardsville/SIUE | Edwardsville Police – Traffic Stops | 8365 | 20ad | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Pontoon Beach Police – Dispatch | 7346 | 1cb2 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Glen Carbon/Maryville Police – Dispatch | 7348 | 1cb4 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Madison (City) Police – Dispatch | 7931 | 1efb | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Maryville Police – Local/Events | 7941 | 1f05 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Troy Police – Dispatch | 7961 | 1f19 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Venice Police – Dispatch | 8991 | 231f | D |
| Madison Co.-Granite City | SWIC Granite City Public Safety | 7191 | 1c17 | D |
| Madison Co.-Municipal-Others | Collinsville Police – Main (Dispatch) | 8552 | 2168 | D |
| Madison Co.-Municipal-Others | Collinsville Police – Operations | 8554 | 216a | D |
| Madison Co. EMA / Interop | Mutual Aid | 7309 | 1c8d | D |
| Madison Co. EMA / Interop | Mutual Aid | 8399 | 20cf | D |
| Madison Co. Sheriff/Law/Government | Car-to-Car/Secondary Dispatch | 7304 | 1c88 | D |
| Madison Co. Sheriff/Law/Government | Alton High School – Officers | 7312 | 1c90 | D |
| Madison Co. Sheriff/Law/Government | Investigations D (w/ Local Law) | 7313 | 1c91 | D |
| Madison Co. Sheriff/Law/Government | Probation Officers/Rural Police (rare use) | 7314 | 1c92 | D |
| Madison Co. Sheriff/Law/Government | Madison Co. Sheriff/Law/Government – Tactical Channel (Events; w/ Dispatcher) | 7320 | 1c98 | D |
| Madison Co. Sheriff/Law/Government | Madison Co. Sheriff/Law/Government – Tactical Channel | 7321 | 1c99 | D |
| Madison Co. Sheriff/Law/Government | Madison Co. Sheriff/Law/Government – Tactical Channel | 7350 | 1cb6 | D |
| Madison Co. Sheriff/Law/Government | Operations (w/ SOS Police) | 7351 | 1cb7 | D |
| Madison Co. Sheriff/Law/Government | Captains/Administrators – (Charles Units) | 7355 | 1cbb | D |
| Madison Co.-Alton, Wood River Dispatch | WR Law – Field Testing 29131 | 29131 | 71cb | D |
| Madison Co.-Alton, Wood River Dispatch | WR Law – Field Testing 29132 | 29132 | 71cc | D |
| Madison Co.-Alton, Wood River Dispatch | WR Law – Field Testing 29133 | 29133 | 71cd | D |
| Madison Co.-Alton, Wood River Dispatch | WR Law – Field Testing 29134 | 29134 | 71ce | D |
| Madison Co.-Alton, Wood River Dispatch | WR Law – Testing 29135 | 29135 | 71cf | D |
| Madison Co.-Alton, Wood River Dispatch | Alton Police 29139 | 29139 | 71d3 | D |
| Madison Co.-Alton, Wood River Dispatch | Testing 29145 | 29145 | 71d9 | T |
| Madison Co.-Edwardsville/SIUE | SIUE Police – Car-to-Car | 7952 | 1f10 | D |
| Madison Co.-Edwardsville/SIUE | SIUE Police – Operations | 7954 | 1f12 | D |
| Madison Co.-Edwardsville/SIUE | Edwardsville Police – Car-to-Car | 8366 | 20ae | D |
| Madison Co.-Edwardsville/SIUE | Edwardsville Police – Operations | 8368 | 20b0 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Glen Carbon – Local / Citywide | 7347 | 1cb3 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Madison (City) Police – Car-to-Car | 7932 | 1efc | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) Unconfirmed | Madison (City) Police – Tactical | 7935 | 1eff | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Maryville Police – Car-to-Car | 7942 | 1f06 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) Unconfirmed | Maryville Police – Local/Events | 7943 | 1f07 | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Troy Police – Car-to-Car | 7962 | 1f1a | D |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Venice Police – Tactical | 8992 | 2320 | D |
| Madison Co.-Granite City | Car-to-Car/Events | 7922 | 1ef2 | D |
| Madison Co.-Granite City | Operations | 7928 | 1ef8 | D |
| Madison Co.-Granite City | Schools/Police 7929 | 7929 | 1ef9 | D |
| Madison Co.-Granite City | Schools/Police 7930 | 7930 | 1efa | D |
| Madison Co.-Municipal-Others | Hamel Police – Local Operations | 7344 | 1cb0 | D |
| Madison Co.-Municipal-Others | Worden Police – Local Operations (w/ Hamel) | 7345 | 1cb1 | D |
| Madison Co.-Municipal-Others | Collinsville Police – Emergency Button Trigger | 8551 | 2167 | D |
| Madison Co.-Municipal-Others | Collinsville Police – Operations | 8555 | 216b | D |
| Madison Co.-Municipal-Others | Collinsville Police – Operations | 8556 | 216c | D |
| Madison Co.-Municipal-Others | Collinsville Police – Events (Local) | 8557 | 216d | D |
| Madison Co.-Alton, Wood River Dispatch | Alton Police – Events/Parades | 29137 | 71d1 | T |
26 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Madison Co.-Granite City | Madison Co.-Granite City – Dispatch | 7921 | 1ef1 | D Encrypted |
| Madison Co. Sheriff/Law/Government | Car-to-Car | 7317 | 1c95 | D Encrypted |
| Madison Co. Sheriff/Law/Government | Investigations E | 7318 | 1c96 | D Encrypted |
| Madison Co. Sheriff/Law/Government | Investigations F | 7319 | 1c97 | D Encrypted |
| Madison Co. Sheriff/Law/Government | Investigations G | 7322 | 1c9a | D Encrypted |
| Madison Co. Sheriff/Law/Government | Investigations H | 7324 | 1c9c | D Encrypted |
| Madison Co. Sheriff/Law/Government | County Law – Operations | 7376 | 1cd0 | D Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Alton Police – Tactical 29136 | 29136 | 71d0 | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29141 | 29141 | 71d5 | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29142 | 29142 | 71d6 | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29143 | 29143 | 71d7 | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29144 | 29144 | 71d8 | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29146 | 29146 | 71da | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29147 | 29147 | 71db | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29148 | 29148 | 71dc | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29149 | 29149 | 71dd | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29153 | 29153 | 71e1 | T Encrypted |
| Madison Co.-Alton, Wood River Dispatch | Testing 29154 | 29154 | 71e2 | T Encrypted |
| Madison Co.-Edwardsville/SIUE | SIUE Police – Operations | 7953 | 1f11 | D Encrypted |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Glen Carbon Police – Car-to-Car Channel 2 / Investigations (GCI) | 7349 | 1cb5 | D Encrypted |
| Madison Co.-Glen Carbon PSAP (GlenCom) | Troy Police – Detectives | 7963 | 1f1b | D Encrypted |
| Madison Co.-Granite City | Operations | 7923 | 1ef3 | D Encrypted |
| Madison Co.-Granite City | Operations | 7924 | 1ef4 | D Encrypted |
| Madison Co.-Granite City | Operations | 7925 | 1ef5 | D Encrypted |
| Madison Co.-Municipal-Others | Collinsville Police – Car-to-Car | 8553 | 2169 | D Encrypted |
| Madison Co. Sheriff/Law/Government | Court-Bailiffs (Multicast 800R ENC) | 7308 | 1c8c | D Encrypted |
Radio system sites in Madison County
Program the control channel first; your scanner finds the voice channels from it.
Cherokee Pass/Fredericktown · Missouri Statewide Wireless Interoperable Network (MOSWIN)
RFSS 3 · Site 9 (hex 9) · NAC 1C9
Control 152.03, 155.505
Voice 152.165, 152.6, 152.72, 159.33
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.
Cities & communities in Madison County
Common questions
What frequency do the police use in Madison County?
Dispatch channels listed for Madison County: Madison County Sheriff 154.7625 MHz (CC 10 · TG 300 · SL 1); Madison County Sheriff 154.7625 MHz (CC 10 · TG 5 · SL 1).
Are Madison County police talkgroups encrypted?
26 of the 84 talkgroups listed for Madison County are marked fully or partly encrypted; a scanner cannot decode encrypted audio.