About Looking Glass Police Frequencies
- 11 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 2 conventional channels use a digital mode (P25, DMR), which needs a scanner that decodes those modes.
- Trunked radio systems that carry law-enforcement traffic here: Centralia Correctional Center - IDOC: 4 talkgroups; Clinton County IL Public Safety: 1 talkgroup; STARCOM21 Statewide Illinois: 6 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 Looking Glass, start with the Simulcast 2-1 site of Clinton County IL Public Safety, about 13 miles away. Its control channels: 155.13, 155.4375, 155.5575 MHz.
Clinton County channels that also cover Looking Glass
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Clinton County Sheriff | Clinton County Sheriff – Dispatch – West | 154.8750 In 159.0300 | 210.7 PL | FMN | KSA936 |
| Clinton County Sheriff | Clinton County Sheriff – Dispatch – East | 154.8750 In 155.6100 | 210.7 PL | FMN | KSA936 |
| Clinton County Sheriff | FBI | 170.8125 | NAC 540 | P25 | — |
| Kaskaskia College (Centralia) | Simulcast of Clinton Law 154.875 | 463.2375 In 468.2375 | CC 5 · TG 911 · SL 2 | DMR | WPYT638 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Clinton County Sheriff | Talk-Around | 154.8900 | FMN | KSA936 | |
| Clinton County Sheriff | Clinton County Sheriff – Tactical Channel | 155.1300 | 123.0 PL | FMN | KSA936 |
| Clinton County Sheriff | Mobile Extenders | 173.2100 | FMN | KSA936 |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Centralia Correctional Center [K-7] | Operations | 453.3500 In 458.3500 | 186.2 PL | FMN | KDZ716 |
| Centralia Correctional Center [K-7] | Operations | 453.6500 In 458.6500 | 127.3 PL | FMN | KDZ716 |
| Centralia Correctional Center [K-7] | Mental Health | 453.8750 In 458.8750 | 210.7 PL | FMN | KDZ716 |
| Centralia Correctional Center [K-7] | Operations | 453.8750 In 458.8750 | 127.3 PL | FMN | KDZ716 |
| Murray Developmental Center - Centralia | Operations (in use) | 453.8750 In 458.8750 | 210.7 PL | FMN | KKD316 |
| Murray Developmental Center - Centralia | Maintenance | 458.3500 | 186.2 PL | FMN | KKD316 |
Centralia Correctional Center - IDOC
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| All | Operations | 16 | 10 | D |
| All | Operations | 208 | d0 | D |
| All | Operations | 240 | f0 | D |
| All | Operations | 464 | 1d0 | D |
Clinton County IL Public Safety
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Clinton County Sheriff | Field Testing | 303 | 12f | D |
STARCOM21 Statewide Illinois
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Clinton County Sheriff | Clinton County Sheriff – Dispatch (Patch 154.875) | 7901 | 1edd | D |
| Clinton County Sheriff | Sheriff/Rural Law | 7902 | 1ede | D |
| Clinton County Sheriff | Car-Car | 7903 | 1edf | D |
| Clinton County Sheriff | Clinton County Sheriff – Tactical Channel | 7904 | 1ee0 | D |
| Clinton County Sheriff | Clinton County Sheriff – Tactical Channel | 7905 | 1ee1 | D |
| Clinton County Sheriff | Clinton County Sheriff – Tactical Channel | 7906 | 1ee2 | D |
Nearest trunked radio sites
Distances are measured from the center of Looking Glass.
Simulcast 2-1 · Clinton County IL Public Safety
RFSS 2 · Site 1 (hex 1) · NAC B63 · about 13 mi away
Control 155.13, 155.4375, 155.5575, 155.6775, 155.805
Voice 155.3175, 155.9475
St. Clair Co Simulcast · STARCOM21 Statewide Illinois
RFSS 3 · Site 59 (hex 3B) · NAC 140 · about 17 mi away
Control 851.225, 851.5625, 852.1625
Voice 851.075, 851.175, 851.7, 851.8, 852.0875, 852.5875, 852.7, 852.75, 853.1375, 853.6375, 853.75, 853.85, 857.7375
Centralia · Centralia Correctional Center - IDOC
Site 1 (hex 1) · about 25 mi away
Control 855.9625, 856.2375, 858.9625
Voice 855.2375
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 Looking Glass?
We do not have a dispatch channel listed specifically for Looking Glass. County-level dispatch channels in the same county: Clinton County Sheriff 154.8750 MHz (210.7 PL); Clinton County Sheriff 154.8750 MHz (210.7 PL); Clinton County Sheriff 170.8125 MHz (NAC 540).