Sheriff's Office Partially Encrypted

St. Clair County Sheriff

St. Clair, Illinois

What you can do right now

Encryption Details

Encryption Type P25 AES-256
Scope Some talkgroups encrypted (25% per RadioReference data); others remain in the clear.
Technical Details P25 AES-256

Verified Talkgroup Data

Verified Mar 6, 2026 Moderate confidence
34 Total Talkgroups
8 Encrypted
1 Mixed
25 Unencrypted
25% Encrypted
Radio System: First Student - St. Louis (LTR), Joint National Capital Region, AmerenMissouri (P25), Warner Communications-BJC Hospitals (NXDN), Warner Communications (DMR 13), Southwestern Illinois Digital Group WS9IDG, Missouri BrandMeister DMR
View 9 talkgroups
DEC Alpha Tag Description Status
1671 NGA STL 71 Operations (St Louis) 71 Encrypted
1685 NGA STL 1685 Operations (St Louis) 1685 Mixed
1693 NGA STL 1693 Operations (St Louis) 1693 Encrypted
1684 NGA STL 1684 Operations (St Louis) 1684 Encrypted
1648 NGA STL 1648 Operations (St Louis) 1648 Encrypted
1689 NGA STL 1689 Operations (St Louis) 1689 Encrypted
1646 NGA STL 1646-T Operations (St Louis) 1646-T Encrypted
1687 NGA STL 1687 Operations (St Louis) 1687 Encrypted
58636 NGA STL 58636 Operations (St Louis) 58636 Encrypted

Verification Status

We do have per-talkgroup data for St. Clair County Sheriff 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 St. Clair County Sheriff 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 St. Clair County Sheriff: First Student - St. Louis (LTR) / Joint National Capital Region / AmerenMissouri (P25) / Warner Communications-BJC Hospitals (NXDN) / Warner Communications (DMR 13) / Southwestern Illinois Digital Group WS9IDG / Missouri BrandMeister DMR is shared county-wide or regional infrastructure, also used by 1 other agency in St. Clair County — one radio system, several agency pages.

St. Clair County Context

Of the 3 public-safety agencies we track in St. Clair County, St. Clair County Sheriff is currently the only one we have flagged as encrypted.

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 St. Clair County Sheriff radio encrypted?

St. Clair County Sheriff 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 St. Clair County Sheriff on a police scanner?

Possibly. Our database lists St. Clair County Sheriff 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 St. Clair County Sheriff encrypt their radio?

Departments typically point to officer safety and operational security. Neither claim tends to come with evidence specific to St. Clair County; what's verifiable is what's lost — journalists can't monitor sheriff's office activity in real time, and coordination with agencies that stay unencrypted gets harder.

Can St. Clair County reverse the encryption decision?

Yes. Encryption is a policy choice made by department leadership or elected officials, not a technical requirement, so it can be reversed the same way. Public pressure, city council advocacy, and organized local coalitions have reversed encryption decisions elsewhere.

What can I do about St. Clair County Sheriff encryption?

Contact the officials who oversee St. Clair County Sheriff's budget directly and ask why full encryption was chosen over partial alternatives. Pair that with a FOIA request for recordings and policy records, and look for an existing coalition in St. Clair County, or start one, since agencies respond differently to organized, sustained pressure than to individual complaints.

Advertisement