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Primghar Police Frequencies

We do not have frequencies listed specifically for Primghar in O'Brien County, Iowa yet. Countywide channels for O'Brien County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Sanborn (Iowa Statewide Interoperable Communications System (ISICS)), about 10 miles away.

About Primghar Police Frequencies

  • 3 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.

O'Brien County channels that also cover Primghar

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
O'Brien County SheriffO'Brien County Sheriff – Dispatch154.7400
In 158.7900
NAC 071P25WNYK934

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
O'Brien County SheriffO'Brien County Sheriff – Tactical Channel155.1900FMKAA317

Talk-around & Car-to-Car

AgencyDescriptionFrequency (MHz)ToneModeFCC
O'Brien County SheriffSheriff Information – Base155.6100FMKAA317
O'Brien County SheriffSheriff Information – Mobiles155.9100FMKAA317

Nearest trunked radio sites

Distances are measured from the center of Primghar.

Sanborn · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 1 · Site 71 (hex 47) · about 10 mi away
Control 770.40625
Voice 769.15625, 769.40625, 769.65625, 769.90625, 770.15625
Cherokee · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 1 · Site 22 (hex 16) · NAC 4C3 · about 20 mi away
Control 774.03125, 774.28125, 774.78125
Voice 773.03125, 773.28125, 773.53125, 773.78125
Dickinson Co Simulcast · Iowa Statewide Interoperable Communications System (ISICS)
RFSS 2 · Site 30 (hex 1E) · NAC 4C0 · about 31 mi away
Control 770.93125, 774.55625, 774.80625
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 Primghar?

We do not have a dispatch channel listed specifically for Primghar. County-level dispatch channels in the same county: O'Brien County Sheriff 154.7400 MHz (NAC 071).