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Sparta Police Frequencies

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

About Sparta Police Frequencies

  • 5 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 (DMR), which needs a scanner that decodes that mode.
  • Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 4 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 Sparta, start with the Gilson site of STARCOM21 Statewide Illinois, about 9 miles away. Its control channels: 851.875, 852.4, 857.2125 MHz.

Knox County channels that also cover Sparta

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Knox County Sheriff OldKnox County Sheriff – Dispatch (Simulcast SC21 TG 1926)155.5350
In 158.9100
136.5 PLFMNKSC430

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Knox County Sheriff OldMobile Extenders151.1450FMNKSC430
Knox County Sheriff OldKnox County Sheriff – Alternate155.4900136.5 PLFMNKSC430

Jails & Corrections

AgencyDescriptionFrequency (MHz)ToneModeFCC
Hill Correctional Center (Galesburg-Knox) [K-29]Operations453.6250
In 458.6250
127.3 PLFMNWNEB976
Hill Correctional Center (Galesburg-Knox) [K-29] UnconfirmedOperations453.8750
In 458.8750
127.3 PLFMNWNEB976
Knox County SheriffJail (TG 1/2)159.1575
In 153.9425
CC 1 · TG 1 · SL *DMRKSC430

STARCOM21 Statewide Illinois

AgencyDescriptionTalkgroupHexMode
Knox County SheriffKnox County Sheriff – Dispatch (Dispatcher simulcast on 155.535)1926786D
Knox County SheriffKnox County Sheriff – Dispatch – Secondary1927787D
Knox County SheriffOperations1928788D
Knox County SheriffOperations193078aD

Nearest trunked radio sites

Distances are measured from the center of Sparta.

Gilson · STARCOM21 Statewide Illinois
RFSS 2 · Site 45 (hex 2D) · NAC 14B · about 9 mi away
Control 851.875, 852.4, 857.2125
Voice 851.35, 855.8625
Andover · STARCOM21 Statewide Illinois
RFSS 2 · Site 39 (hex 27) · NAC 14D · about 18 mi away
Control 852.9625, 853.4875
Voice 852.4375, 858.2125
Monmouth · STARCOM21 Statewide Illinois
RFSS 2 · Site 21 (hex 15) · NAC 140 · about 20 mi away
Control 853.35, 853.925, 855.2125
Voice 852.825, 855.3875
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.