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Rex Police Frequencies

We do not have frequencies listed specifically for Rex in Lyman County, South Dakota yet. Countywide channels for Lyman County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Reliance (Medicine Butte) (South Dakota State Radio System), about 7 miles away.

About Rex Police Frequencies

  • Trunked radio systems that carry law-enforcement traffic here: South Dakota State Radio System: 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 Rex, start with the Reliance (Medicine Butte) site of South Dakota State Radio System, about 7 miles away. Its control channels: 155.655, 156.03 MHz.

Lyman County channels that also cover Rex

South Dakota State Radio System

AgencyDescriptionTalkgroupHexMode
Lyman County SheriffLower Brule Law Agency1227aD
Lyman County SheriffLyman County Sheriff – Dispatch1030406D
Lyman County SheriffLower Brule Law17096adD
Lyman County SheriffLaw/Fire1031407D

Nearest trunked radio sites

Distances are measured from the center of Rex.

Reliance (Medicine Butte) · South Dakota State Radio System
RFSS 1 · Site 58 (hex 3A) · NAC 470 · about 7 mi away
Control 155.655, 156.03
Voice 155.85, 159.165
Iona · South Dakota State Radio System
RFSS 1 · Site 2 (hex 2) · NAC 470 · about 29 mi away
Control 156.015, 159.06, 159.285
Voice 159.69
Winner · South Dakota State Radio System
RFSS 1 · Site 46 (hex 2E) · about 42 mi away
Control 155.565, 156.1125, 157.77
Voice 158.49
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.