About Plymouth Police Frequencies
- Trunked radio systems that carry law-enforcement traffic here: North Dakota Statewide Interoperable Radio Network (SIRN 20/20): 10 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 Plymouth, start with the Petersburg site of North Dakota Statewide Interoperable Radio Network (SIRN 20/20), about 6 miles away. Its control channels: 851.9625, 852.4625 MHz.
- 10 listed entries are marked encrypted. No scanner can decode encrypted audio.
Grand Forks County channels that also cover Plymouth
North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
10 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Grand Forks County Sheriff | Sheriff Main | 18101 | 46b5 | T Encrypted |
| Grand Forks County Sheriff | Sheriff's Office Main 2 Alternative | 18102 | 46b6 | T Encrypted |
| Grand Forks County- City of Grand Forks | Univ North Dakota Police 1 Main | 18126 | 46ce | T Encrypted |
| Grand Forks County Sheriff | County Sheriff's Task Force Tactical | 18111 | 46bf | T Encrypted |
| Grand Forks County Sheriff | Sheriff Pursuit | 18117 | 46c5 | T Encrypted |
| Grand Forks County- City of Grand Forks | Univ North Dakota Police 2 Tactical | 18127 | 46cf | T Encrypted |
| Grand Forks County Sheriff | Sheriff Operations | 18104 | 46b8 | T Encrypted |
| Grand Forks County Sheriff | Grand Forks County Jail | 18128 | 46d0 | T Encrypted |
| Grand Forks County Sheriff | County Jail Operations | 18129 | 46d1 | T Encrypted |
| Grand Forks County Sheriff | Juvenile Detention Center | 18130 | 46d2 | T Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Plymouth.
Petersburg · North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
RFSS 1 · Site 35 (hex 23) · NAC A62 · about 6 mi away
Control 851.9625, 852.4625
Voice 851.7375
Lakota · North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
RFSS 1 · Site 64 (hex 40) · about 18 mi away
Control 853.8125
Voice 853.3625, 853.5875
Larimore · North Dakota Statewide Interoperable Radio Network (SIRN 20/20)
RFSS 1 · Site 117 (hex 75) · about 21 mi away
Control 853.6875
Voice 853.2375, 853.4625
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.