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Columbia Police Frequencies

We do not have frequencies listed specifically for Columbia in Coos County, New Hampshire yet. Countywide channels for Coos County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Manchester Simulcast (Manchester), about 130 miles away.

About Columbia 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.
  • 1 conventional channel uses a digital mode (P25), which needs a scanner that decodes that mode.

Coos County channels that also cover Columbia

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Coos County SheriffCounty Police Department – Mixed Mode155.5950
In 150.7750
136.5 PLFMNWQWB267
Coos County SheriffCounty Police Department – Mixed Mode155.5950
In 150.7750
NAC 117P25WQWB267
Coos County SheriffCounty Sheriff – Whitefield Repeater156.1350CSQFMN—

Nearest trunked radio sites

Distances are measured from the center of Columbia.

Manchester Simulcast · Manchester
RFSS 1 · Site 1 (hex 1) · NAC 8A1 · about 130 mi away
Control 857.9375, 858.2125, 858.4875, 859.4875
Voice 854.0625, 854.9875, 856.2125, 856.4875, 856.7625, 857.2375, 857.4875
Colonial Drive · Litchfield
Site 1 (hex 1) · about 132 mi away
Voice 453.15, 453.5
Highlander Ct · Litchfield
Site 2 (hex 2) · about 132 mi away
Voice 460.1875, 460.525
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 Columbia?

We do not have a dispatch channel listed specifically for Columbia. County-level dispatch channels in the same county: Coos County Sheriff 155.5950 MHz (136.5 PL); Coos County Sheriff 155.5950 MHz (NAC 117); Coos County Sheriff 156.1350 MHz (CSQ).