About Tewksbury Police Frequencies
- 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 7 conventional channels use a digital mode (P25), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: Commonwealth of Massachusetts Interoperable Radio System - BC5: 18 talkgroups; Middlesex County Sheriff: 3 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 Tewksbury, start with the Massport Hanscom Field site of Commonwealth Of Massachusetts Interoperable Radio System (CoMIRS), about 10 miles away. Its control channels: 857.0125, 857.4375, 858.2625 MHz.
- 7 listed entries are marked encrypted. No scanner can decode encrypted audio.
Tewksbury conventional frequencies
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Tewksbury Police | Police Primary Operations / Tactical | 482.6625 In 485.6625 | NAC 851 | P25 | WIJ444 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Tewksbury Police | Tewksbury Police – Alternate | 483.5000 | NAC 226 | P25 Encrypted | WPMB879 |
Middlesex County channels that also cover Tewksbury
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Framingham State University | Campus Police | 471.5250 In 474.5250 | 172 DPL | FMN | WPLU291 |
| Harvard University | Campus Police | 484.0875 | NAC 495 | P25 Encrypted | WIL504 |
| Harvard University | Campus Police | 484.2625 | NAC 495 | P25 Encrypted | KFN287 |
| UMass - Lowell | Campus Police/EMS Operations | 460.3875 In 465.3875 | NAC 769 | P25 Encrypted | KIG568 |
| UMass - Lowell | Campus Police/EMS Secondary | 484.7125 In 487.7125 | NAC 769 | P25 | WQGA385 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Massachusetts Institute of Technology | Campus Police Department Patrol | 852.4375 In 807.4375 | NAC 0B3 | P25 | WPSE405 |
Talk-around & Car-to-Car
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| UMass - Lowell | Campus Police Training | 451.3125 | 141.3 PL | FMN | WQFX933 |
Commonwealth of Massachusetts Interoperable Radio System - BC5
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| New Braintree Regional | C8 Regional Police Operations | 7311 | 1c8f | T |
| Department of Corrections (DOC) - Bridgewater (Old Colony) | Prison Officers | 2916 | b64 | T |
| Department of Corrections (DOC) - Bridgewater (Old Colony) | Prisoner Movement | 2931 | b73 | T |
| Department of Corrections (DOC) - Bridgewater (Old Colony) | Prisoner Status Checks | 2938 | b7a | T |
| Department of Corrections (DOC) - Bridgewater (Old Colony) | Facilities | 2942 | b7e | T |
| Department of Corrections (DOC) - Concord | Northeast Corrections Ctr – Operations | 2826 | b0a | T |
| Department of Corrections (DOC) - Framingham | DOC Facilities | 2871 | b37 | T |
| Department of Corrections (DOC) - Gardner | Prisoner Movement | 2781 | add | T |
| Department of Corrections (DOC) - Norfolk | Operations | 2758 | ac6 | T |
| Department of Corrections (DOC) - Norfolk | Prison Officers | 2886 | b46 | T |
| Department of Corrections (DOC) - Norfolk | Prison Facilities | 2901 | b55 | T |
| Department of Corrections (DOC) - Shirley | Prisoner Movement | 2796 | aec | T |
| Department of Corrections (DOC) - Shirley | Facilities Maintenance | 2799 | aef | T |
| Department of Corrections (DOC) - Shirley | Corrections Officers/Door Control | 2804 | af4 | T |
| Department of Corrections (DOC) - Shirley | Kilo/Julie Side Corrections Officers | 2805 | af5 | T |
| Department of Corrections (DOC) - Shirley | Lima/Michael Side Corrections Officers | 2806 | af6 | T |
| Department of Corrections (DOC) - Shirley | Administration/Medication Distribution | 2811 | afb | T |
| Department of Corrections (DOC) - Shirley | Yard Operations | 2818 | b02 | T |
Middlesex County Sheriff
3 encrypted talkgroups (cannot be monitored)
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Operations | Operations | 1 | 1 | T Encrypted |
| Operations | Operations | 2 | 2 | T Encrypted |
| Operations | Operations | 3 | 3 | T Encrypted |
Nearest trunked radio sites
Distances are measured from the center of Tewksbury.
Massport Hanscom Field · Commonwealth Of Massachusetts Interoperable Radio System (CoMIRS)
RFSS 1 · Site 34 (hex 22) · NAC D14 · about 10 mi away
Control 857.0125, 857.4375, 858.2625, 859.4375
Voice 854.0125, 856.4375
Essex House Of Corrections · Boston and Essex County
RFSS 1 · Site 95 (hex 5F) · NAC 941 · about 11 mi away
Control 774.13125, 774.70625
Voice 772.75625, 773.49375
Concord · Commonwealth of Massachusetts Interoperable Radio System - BC5
RFSS 1 · Site 112 (hex 70) · NAC BC1 · about 13 mi away
Control 853.175
Voice 851.35, 852.45
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 Tewksbury?
Dispatch channels listed for Tewksbury: Tewksbury Police 482.6625 MHz (NAC 851).