About Johnston 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.
- Trunked radio systems that carry law-enforcement traffic here: Edgefield County DMR (DMR): 1 talkgroup; Federal Correctional Institution Edgefield: 3 talkgroups; Palmetto 800: 1 talkgroup. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Johnston, start with the Johnston site of Palmetto 800, about 2 miles away. Its control channels: 851.625, 859.8875 MHz.
- 1 listed entry is marked encrypted. No scanner can decode encrypted audio.
Edgefield County channels that also cover Johnston
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Edgefield County Sheriff | Edgefield County Sheriff – Dispatch | 453.3500 | 107.2 PL | FMN | KAN719 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Edgefield County Sheriff | Regional Mutial Aid Channel | 453.4500 | 107.2 PL | FMN | KAN719 |
| Edgefield County Sheriff | Edgefield County Sheriff – Tactical Channel | 460.3000 | FMN | WQCY532 |
Edgefield County DMR
DMR
1 encrypted talkgroup (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Edgefield County Sheriff | Edgefield County Sheriff – Dispatch | 101 | 65 | T Encrypted |
Federal Correctional Institution Edgefield
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| All Talkgroups | Control | 16 | 10 | D |
| All Talkgroups | General Compound Operations | 32 | 20 | D |
| All Talkgroups | Facilities | 48 | 30 | D |
Palmetto 800
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Edgefield County Sheriff | Edgefield County Sheriff – Tactical Channel | 43001 | a7f9 | D |
Nearest trunked radio sites
Distances are measured from the center of Johnston.
Johnston · Palmetto 800
RFSS 2 · Site 93 (hex 5D) · about 2 mi away
Control 851.625, 859.8875
Voice 851.0625, 852.275, 856.9375, 858.8625, 858.8875
Site 1 · Federal Correctional Institution Edgefield
Site 1 (hex 1) · about 8 mi away
Control 406.8125, 407.0125, 408.25, 408.8125, 409.0125
Clarks Hill · Edgefield County DMR
DMR · Site 1 (hex 1) · about 10 mi away
Control 453.25
Voice 453.6625, 460.125, 460.375, 460.6125
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 Johnston?
We do not have a dispatch channel listed specifically for Johnston. County-level dispatch channels in the same county: Edgefield County Sheriff 453.3500 MHz (107.2 PL).