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Plum Hill Police Frequencies

We do not have frequencies listed specifically for Plum Hill in Washington County, Illinois yet. Countywide channels for Washington County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Simulcast 2-1 (Clinton County IL Public Safety), about 18 miles away.

About Plum Hill Police Frequencies

  • 3 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.
  • Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 1 talkgroup. A trunking scanner is required, and it must support the system type shown.
  • To follow a trunked system, program a control channel first. For Plum Hill, start with the Simulcast 2-1 site of Clinton County IL Public Safety, about 18 miles away. Its control channels: 155.13, 155.4375, 155.5575 MHz.
  • 1 listed entry is marked encrypted. No scanner can decode encrypted audio.

Washington County channels that also cover Plum Hill

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Washington County SheriffWashington County Sheriff – Dispatch151.4600
In 159.0000
NAC 293P25 WQSL522
Washington County SheriffRural Law Dispatch155.6250
In 159.1500
179.9 PLFMNKFM399

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Washington County SheriffCar-to-Car156.0300FMNKFM399
Washington County SheriffLow Power156.1500FMNKA41807

STARCOM21 Statewide Illinois

AgencyDescriptionTalkgroupHexMode
Washington County SheriffWashington County Sheriff – Dispatch53761500D

Nearest trunked radio sites

Distances are measured from the center of Plum Hill.

Simulcast 2-1 · Clinton County IL Public Safety
RFSS 2 · Site 1 (hex 1) · NAC B63 · about 18 mi away
Control 155.13, 155.4375, 155.5575, 155.6775, 155.805
Voice 155.3175, 155.9475
Sparta · STARCOM21 Statewide Illinois
RFSS 3 · Site 49 (hex 31) · NAC 147 · about 20 mi away
Control 852.85, 853.375
Voice 852.325, 859.2125
St. Clair Co Simulcast · STARCOM21 Statewide Illinois
RFSS 3 · Site 59 (hex 3B) · NAC 140 · about 24 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
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 Plum Hill?

We do not have a dispatch channel listed specifically for Plum Hill. County-level dispatch channels in the same county: Washington County Sheriff 151.4600 MHz (NAC 293); Washington County Sheriff 155.6250 MHz (179.9 PL).