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Duncan Police Frequencies

We do not have frequencies listed specifically for Duncan in Mercer County, Illinois yet. Countywide channels for Mercer County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Joy (STARCOM21 Statewide Illinois), about 6 miles away.

About Duncan Police Frequencies

  • 9 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.

Mercer County channels that also cover Duncan

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
911 / ETSB911/Sheriff – Local Police – Aledo154.3850
In 150.7900
FMNWPEH963
Mercer County SheriffMercer County Sheriff – Dispatch – New (Aledo)151.2275
In 156.1875
162.2 PLFMNWNHJ643
Mercer County SheriffMercer County Sheriff – Dispatch154.1000
In 159.0525
71.9 PLFMNWNHJ648
Mercer County SheriffMercer County Sheriff – Dispatch (at ??)155.6250
In 156.0300
192.8 PLFMNWNHJ643
Mercer County SheriffMercer County Sheriff – Dispatch (at ??)155.6250
In 156.0300
179.9 PLFMNWNHJ643
Mercer County SheriffMercer County Sheriff – Dispatch (at ??)155.6250
In 156.0300
186.2 PLFMNWNHJ643
Mercer County SheriffMercer County Sheriff – Dispatch (Extender/RF Link-Aledo)469.5500123.0 PLFMN—

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Mercer County SheriffCar-to-Car151.6250186.2 PLFMNWNHJ643
Mercer County SheriffMobile Extenders465.4750FMNWNHJ643

Nearest trunked radio sites

Distances are measured from the center of Duncan.

Joy · STARCOM21 Statewide Illinois
RFSS 2 · Site 40 (hex 28) · NAC 147 · about 6 mi away
Control 852.8875, 853.4125, 853.9875
Voice 851.8375, 852.3625
Illinois City · STARCOM21 Statewide Illinois
RFSS 2 · Site 42 (hex 2A) · NAC 148 · about 9 mi away
Control 851.95, 852.475, 853.8875
Voice 851.425
Rock Island · STARCOM21 Statewide Illinois
RFSS 2 · Site 43 (hex 2B) · NAC 146 · about 19 mi away
Control 852.325
Voice 851.4875, 852.85, 853.375, 853.95
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 Duncan?

We do not have a dispatch channel listed specifically for Duncan. County-level dispatch channels in the same county: Mercer County Sheriff 151.2275 MHz (162.2 PL); Mercer County Sheriff 154.1000 MHz (71.9 PL); Mercer County Sheriff 155.6250 MHz (192.8 PL); Mercer County Sheriff 155.6250 MHz (179.9 PL).