About Northfield Police Frequencies
- 4 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: Commonwealth Of Massachusetts Interoperable Radio System (CoMIRS): 3 talkgroups; Massachusetts State Police: 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 Northfield, start with the Mount Grace (Warwick) site of Massachusetts State Police, about 4 miles away. Its control channels: 854.0875, 854.6125 MHz.
Northfield conventional frequencies
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Northfield Police | Police Mobile Repeater | 453.4375 | 173.8 PL | FMN | — |
Franklin County channels that also cover Northfield
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Greenfield Community College | Campus Police | 462.4375 In 467.4375 | 141.3 PL | FMN | WQGV559 |
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| FRCOG - Police | Borden Mountain Tower Police WMLEC Tie | 453.4125 In 458.4125 | 206.5 PL | FMN | — |
| FRCOG - Police | Mount Grace Tower Police WMLEC Tie | 453.6000 In 458.6000 | 206.5 PL | FMN | — |
Commonwealth Of Massachusetts Interoperable Radio System (CoMIRS)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Franklin County Sheriff | Mount Toby 1 Simulcast | 2302 | 8fe | D |
| Franklin County Sheriff | Mount Toby 2 Simulcast | 2304 | 900 | D |
| Franklin County Sheriff | FRCOG – Police Simulcast | 3699 | e73 | D |
Massachusetts State Police
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Franklin County Sheriff | County Police Dispatch (Tie to CoMIRS) | 59184 | e730 | D |
Nearest trunked radio sites
Distances are measured from the center of Northfield.
Mount Grace (Warwick) · Massachusetts State Police
Site 15 (hex F) · about 4 mi away
Control 854.0875, 854.6125
Voice 856.9875, 859.7125, 859.9875
Warwick · Commonwealth Of Massachusetts Interoperable Radio System (CoMIRS)
RFSS 1 · Site 26 (hex 1A) · NAC D13 · about 4 mi away
Control 851.375, 852.3125, 853.475, 853.6375
Voice 851.2, 852.475
Worcester NW Simulcast · Commonwealth of Massachusetts Interoperable Radio System - BC5
RFSS 1 · Site 43 (hex 2B) · NAC BC3 · about 6 mi away
Control 853.05, 853.7125, 856.8875, 858.0125
Voice 851.4125, 852.425
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.