About Northfield 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.
- 3 conventional channels use a digital mode (P25), which needs a scanner that decodes that mode.
Northfield conventional frequencies
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Northfield Police | Northfield Police – Tactical Channel | 155.0550 | 136.5 PL | FMN | WNID798 |
Merrimack County channels that also cover Northfield
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Corrections | Department of Corrections Primary | 155.7300 In 158.8875 | 156.7 PL | FMN | WPJQ729 |
| Merrimack County Sheriff | Dispatch "West" | 155.6850 In 155.1300 | NAC 117 | P25 | KRK930 |
| Merrimack County Sheriff | Sheriff Dspatch "East" | 155.7000 | NAC 117 | P25 | KRK930 |
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Merrimack County Sheriff | Dispatch "East" Simulcast | 159.0900 In 155.0400 | NAC 317 | P25 | WQA717 |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Corrections | Men's State Prison | 155.6550 In 151.4900 | 141.3 PL | FMN | KWF785 |
Nearest trunked radio sites
Distances are measured from the center of Northfield.
Manchester Simulcast · Manchester
RFSS 1 · Site 1 (hex 1) · NAC 8A1 · about 32 mi away
Control 857.9375, 858.2125, 858.4875, 859.4875
Voice 854.0625, 854.9875, 856.2125, 856.4875, 856.7625, 857.2375, 857.4875
Colonial Drive · Litchfield
Site 1 (hex 1) · about 34 mi away
Voice 453.15, 453.5
Highlander Ct · Litchfield
Site 2 (hex 2) · about 34 mi away
Voice 460.1875, 460.525
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 Northfield?
We do not have a dispatch channel listed specifically for Northfield. County-level dispatch channels in the same county: Merrimack County Sheriff 155.6850 MHz (NAC 117); Merrimack County Sheriff 155.7000 MHz (NAC 117).