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Madison Police Frequencies

We do not have frequencies listed specifically for Madison in Richland County, Illinois yet. Countywide channels for Richland County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Sumner (STARCOM21 Statewide Illinois), about 10 miles away.

About Madison Police Frequencies

  • 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
  • 1 conventional channel uses a digital mode (P25), which needs a scanner that decodes that mode.

Richland County channels that also cover Madison

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Richland County SheriffRichland County Sheriff – Dispatch158.7900
In 153.7850
NAC 32DP25KSA941

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Richland County SheriffRichland County Sheriff – Tactical Channel154.6500FMNKSA941
Richland County SheriffRichland County Sheriff – Dispatch – Auxiliary/Events158.7900
In 153.7850
179.9 PLFMNKSA941

Nearest trunked radio sites

Distances are measured from the center of Madison.

Sumner · STARCOM21 Statewide Illinois
RFSS 3 · Site 2 (hex 2) · NAC 148 · about 10 mi away
Control 851.9125, 853.4875
Voice 851.3875, 855.2125
Sumner · Lawrenceville Correctional Center - IDOC (Lawrence)
Site 1 (hex 1) · about 13 mi away
Control 855.7125, 855.9625
Voice 855.2375, 858.9625
Fairfield · STARCOM21 Statewide Illinois
RFSS 3 · Site 28 (hex 1C) · NAC 149 · about 19 mi away
Control 853.35, 853.925
Voice 852.825, 857.2125
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 Madison?

We do not have a dispatch channel listed specifically for Madison. County-level dispatch channels in the same county: Richland County Sheriff 158.7900 MHz (NAC 32D).