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Spring Grove Police Frequencies

We do not have frequencies listed specifically for Spring Grove in Warren County, Illinois yet. Countywide channels for Warren County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Monmouth (STARCOM21 Statewide Illinois), about 9 miles away.

About Spring Grove 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.
  • Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 2 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 Spring Grove, start with the Monmouth site of STARCOM21 Statewide Illinois, about 9 miles away. Its control channels: 853.35, 853.925, 855.2125 MHz.

Warren County channels that also cover Spring Grove

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Warren County Government OldWarren County Government – Dispatch460.2000
In 465.2000
186.2 PLFMNKSA911

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Warren County Government OldCar-to-Car154.8750FMN—

STARCOM21 Statewide Illinois

AgencyDescriptionTalkgroupHexMode
Warren County SheriffWarren County Sheriff – Dispatch557615c8D
Warren County SheriffWarren County Sheriff – Tactical Channel557715c9D

Nearest trunked radio sites

Distances are measured from the center of Spring Grove.

Monmouth · STARCOM21 Statewide Illinois
RFSS 2 · Site 21 (hex 15) · NAC 140 · about 9 mi away
Control 853.35, 853.925, 855.2125
Voice 852.825, 855.3875
Joy · STARCOM21 Statewide Illinois
RFSS 2 · Site 40 (hex 28) · NAC 147 · about 19 mi away
Control 852.8875, 853.4125, 853.9875
Voice 851.8375, 852.3625
Gilson · STARCOM21 Statewide Illinois
RFSS 2 · Site 45 (hex 2D) · NAC 14B · about 25 mi away
Control 851.875, 852.4, 857.2125
Voice 851.35, 855.8625
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.