About Audubon Police Frequencies
- 6 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 3 conventional channels use a digital mode (P25, NXDN48), which needs a scanner that decodes those modes.
- 3 listed entries are marked encrypted. No scanner can decode encrypted audio.
Montgomery County channels that also cover Audubon
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Montgomery County Sheriff | Montgomery County Sheriff – Dispatch (95% ENC) | 151.3250 In 159.2550 | NAC 351 | P25 Encrypted | KNIA485 |
| Montgomery County Sheriff | Mobile Extenders | 154.8900 | FMN | WPIG428 | |
| Montgomery County Sheriff | Mobile Extenders (PL on TX only) | 155.9100 | 173.8 PL | FMN | WPIG428 |
| Montgomery County Sheriff | Mobile Extenders (or Remote Tx at Litchfield) | 173.2550 | 100.0 PL | FMN | — |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Montgomery County Sheriff | Operations | 151.3250 In 159.2550 | NAC 146 | P25 Encrypted | KNIA485 |
| Montgomery County Sheriff | Car-to-Car | 151.3250 | 047 DPL | FMN | KNIA485 |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Graham Correctional Center (Hillsboro) [K-12] | Operations | 453.1000 In 458.1000 | RAN 12 | NXDN48 Encrypted | KDZ731 |
| Graham Correctional Center (Hillsboro) [K-12] | Operations | 453.3500 In 458.3500 | FMN | KDZ731 | |
| Graham Correctional Center (Hillsboro) [K-12] | Operations | 453.8750 In 458.8750 | 127.3 PL | FMN | KDZ731 |
Nearest trunked radio sites
Distances are measured from the center of Audubon.
Lakewood/Williamsburg Hill · STARCOM21 Statewide Illinois
RFSS 2 · Site 26 (hex 1A) · NAC 148 · about 14 mi away
Control 852.35, 852.875, 853.4
Voice 851.825, 853.975
Taylorville CC · STARCOM21 Statewide Illinois
RFSS 2 · Site 27 (hex 1B) · NAC 142 · about 17 mi away
Control 852.9, 853.425, 857.2125
Voice 852.375, 854.1125, 859.3125, 860.2125
Morrisonville · STARCOM21 Statewide Illinois
RFSS 2 · Site 65 (hex 41) · NAC 145 · about 22 mi away
Control 857.7625, 858.2375, 858.7625
Voice 857.2625, 859.2375
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 Audubon?
We do not have a dispatch channel listed specifically for Audubon. County-level dispatch channels in the same county: Montgomery County Sheriff 151.3250 MHz (NAC 351); Montgomery County Sheriff 154.8900 MHz; Montgomery County Sheriff 155.9100 MHz (173.8 PL); Montgomery County Sheriff 173.2550 MHz (100.0 PL).