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Roundup Police Frequencies

We do not have frequencies listed specifically for Roundup in Musselshell County, Montana yet. Countywide channels for Musselshell County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Pompey Pillar (Montana Public Safety Communications System), about 39 miles away.

About Roundup 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.
  • 2 conventional channels use a digital mode (P25), which needs a scanner that decodes that mode.
  • 2 listed entries are marked encrypted. No scanner can decode encrypted audio.

Musselshell County channels that also cover Roundup

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Musselshell County SheriffSheriff Main155.1150
In 158.7525
NAC 023P25 WNFJ434
Musselshell County Sheriff OldMusselshell County Sheriff – Dispatch155.7000
In 154.8900
FMNWNFJ434

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Musselshell County SheriffSheriff Secure Tactical155.0625P25 WNFJ434
Musselshell County SheriffMusselshell County Sheriff – Tactical Channel158.7600074 DPLFMNWNFJ433

Nearest trunked radio sites

Distances are measured from the center of Roundup.

Pompey Pillar · Montana Public Safety Communications System
RFSS 2 · Site 14 (hex E) · NAC 16F · about 39 mi away
Control 151.145, 151.2875
Voice 151.4375, 154.055
Billings Courthouse 800 · Montana Public Safety Communications System
RFSS 2 · Site 15 (hex F) · NAC 160 · about 46 mi away
Control 851.0375, 851.375
Voice 851.75, 852.7375, 853.1375, 853.4375
Billings South 800 · Montana Public Safety Communications System
RFSS 2 · Site 41 (hex 29) · NAC 161 · about 50 mi away
Control 855.2125, 855.7125, 856.4625
Voice 856.9625, 857.4625, 857.9625
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 Roundup?

We do not have a dispatch channel listed specifically for Roundup. County-level dispatch channels in the same county: Musselshell County Sheriff 155.1150 MHz (NAC 023).