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Alto Police Frequencies

We do not have frequencies listed specifically for Alto in Lee County, Illinois yet. Countywide channels for Lee County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Creston (STARCOM21 Statewide Illinois), about 4 miles away.

About Alto Police Frequencies

  • 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 Alto, start with the Creston site of STARCOM21 Statewide Illinois, about 4 miles away. Its control channels: 773.15625, 773.56875, 774.59375 MHz.
  • 3 listed entries are marked encrypted. No scanner can decode encrypted audio.

Lee County channels that also cover Alto

STARCOM21 Statewide Illinois

AgencyDescriptionTalkgroupHexMode
Lee County SheriffInfo/Warrants1080438D
3 encrypted talkgroups (cannot be monitored)
AgencyDescriptionTalkgroupHexMode
Lee County SheriffPatrol1077435D
Lee County SheriffTactical Response Team (TRT)1079437D
Lee County SheriffCar-to-Car1081439D

Nearest trunked radio sites

Distances are measured from the center of Alto.

Creston · STARCOM21 Statewide Illinois
RFSS 1 · Site 36 (hex 24) · NAC 149 · about 4 mi away
Control 773.15625, 773.56875, 774.59375
Voice 770.16875, 773.73125, 774.81875
Simulcast · DeKalb County Public Safety
RFSS 1 · Site 1 (hex 1) · NAC 890 · about 11 mi away
Control 769.83125, 770.30625, 771.50625, 771.83125, 772.10625
Voice 772.43125
DeKalb - City · STARCOM21 Statewide Illinois
RFSS 1 · Site 47 (hex 2F) · NAC 144 · about 12 mi away
Control 851.55, 851.8, 852.6
Voice 851.2, 854.3875, 854.9875, 856.4875
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.