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Grafton Police Frequencies

We do not have frequencies listed specifically for Grafton in Sibley County, Minnesota yet. Countywide channels for Sibley County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Gibbon (Allied Radio Matrix for Emergency Response (ARMER)), about 7 miles away.

About Grafton Police Frequencies

  • Trunked radio systems that carry law-enforcement traffic here: Allied Radio Matrix for Emergency Response (ARMER): 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 Grafton, start with the Gibbon site of Allied Radio Matrix for Emergency Response (ARMER), about 7 miles away. Its control channels: 852.3125, 852.6 MHz.
  • 2 listed entries are marked encrypted. No scanner can decode encrypted audio.

Sibley County channels that also cover Grafton

Allied Radio Matrix for Emergency Response (ARMER)

AgencyDescriptionTalkgroupHexMode
Sibley County SheriffSB Law Main33404827cD
Sibley County SheriffSB Jail33406827eD
2 encrypted talkgroups (cannot be monitored)
AgencyDescriptionTalkgroupHexMode
Sibley County SheriffSibley Law 1E33421828dD
Sibley County SheriffSibley Law 2E33422828eD

Nearest trunked radio sites

Distances are measured from the center of Grafton.

Gibbon · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 3 · Site 26 (hex 1A) · about 7 mi away
Control 852.3125, 852.6
Voice 851.625, 851.95, 853.0625, 853.5625
Hector · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 2 · Site 86 (hex 56) · about 13 mi away
Control 852.3875, 853.425
Voice 851.425, 851.75, 852.8875, 853.9125
Swift County · Allied Radio Matrix for Emergency Response (ARMER)
RFSS 4 · Site 32 (hex 20) · about 16 mi away
Control 854.9875
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.