Other Agency Partially Encrypted

McHenry Government

McHenry, Illinois

What you can do right now

Encryption Details

Encryption Type P25 AES-256
Scope Some talkgroups encrypted (40% per RadioReference data); others remain in the clear.
Technical Details P25 AES-256

Verified Talkgroup Data

Verified Mar 6, 2026 High confidence
10 Total Talkgroups
4 Encrypted
6 Unencrypted
40% Encrypted
Radio System: STARCOM21 Statewide Illinois
View 4 talkgroups
DEC Alpha Tag Description Status
1105 McHenry ShrfTac2 Sheriff: Tac-2 Encrypted
1106 McHenry ShrfTac3 Sheriff: Tac-3 Encrypted
3451 NERCOM E Police Police: Dispatch-Fox River Grove, Johnsburg, McCullom Lake, McHenry Encrypted
34102 SEECOM Police 1 Police: Dispatch-Algonquin, Cary, McHenry County College, Oakwood Hills Encrypted

Verification Status

We do have per-talkgroup data for McHenry Government from the RadioReference API, and used it to set the encryption scope shown above — but no additional human-reviewed source (a live feed check or a dated news account) has been recorded for this record, so treat it as a data-quality correction rather than an independently confirmed verification. Check the live RadioReference database directly for current status.

If you monitor McHenry Government directly or have more current information, the fastest way to fix this is to update the RadioReference Wiki entry — our data pulls from there and from the RadioReference API on a regular refresh cycle.

Shared Radio System

Worth knowing before reading this as specific to McHenry Government: STARCOM21 Statewide Illinois is shared county-wide or regional infrastructure, also used by 0 other agencies in McHenry County — one radio system, several agency pages.

McHenry County Context

McHenry County is a mixed picture: 1 of 8 agencies we track here are fully encrypted (13%), which means some neighboring departments are still audible on a scanner.

What This Means

This agency is listed as encrypting some communications while leaving others open. The per-channel breakdown is unverified — check RadioReference for current status.

See encryption status nationwide Interactive map showing which US police departments have encrypted their radios. Open the encryption map →

Frequently Asked Questions

Is McHenry Government radio encrypted?

McHenry Government is listed in our records with P25 AES-256 encryption — a listing we haven't yet verified against live talkgroup data. This agency is listed as encrypting some communications while leaving others open. The per-channel breakdown is unverified — check RadioReference for current status.

Can I listen to McHenry Government on a police scanner?

Possibly. Our database lists McHenry Government as encrypting some of its talkgroups while leaving others open, which would leave some channels accessible. The listing is unverified — check RadioReference for specific talkgroup status.

Why do agencies like McHenry Government encrypt their radio?

Ask why, and the answer is usually officer safety, sometimes operational security. What is harder to obtain is any documented case in McHenry County where an open channel caused harm. The costs need no such documentation: reporting on other agency response slows down, and mutual-aid coordination gets more awkward, immediately.

Can McHenry County reverse the encryption decision?

Yes. Whoever made this call for McHenry Government can also unmake it; there's no technical lock-in. The approach that has worked elsewhere combines public-records requests, direct council pressure, and a coordinated local coalition.

What can I do about McHenry Government encryption?

Start local: show up when McHenry County officials discuss the budget for McHenry Government, and ask specifically why full encryption was chosen over a delayed feed or tactical-only approach. File a FOIA request for recordings or policy documents, and connect with others nearby who want the same information — a coordinated ask carries more weight than an individual one.

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