Dupage County: 3 agencies with partial encryption
3 public safety agencies in Dupage County, Illinois have encrypted their radio communications.
Radio encryption in Dupage County
No agency in the DuPage County record encrypts everything. DuPage County Police encrypt tactical channels, Naperville Police encrypt specific channels, and the DuPage County Sheriff's Office is listed as partially encrypted, all using P25 AES-256. Traffic runs on STARCOM21 and the Aurora / Naperville Public Safety OpenSky system, and all seven cataloged talkgroups are clear with none flagged encrypted. That combination — encryption confined to tactical and specific channels, with the documented talkgroups open — makes this one of the more favorable counties in the set for a scanner buyer. The sheriff's office is the one record of the three not verified against RadioReference.
Compiled from this site's agency database. Encryption status changes without notice — confirm any specific agency on RadioReference.
Radio systems serving Dupage County
- STARCOM21 Statewide Illinois
- Aurora / Naperville Public Safety (OpenSky)
Of 7 talkgroups catalogued for Dupage County, 0 are encrypted and 7 remain in the clear. A scanner can still receive the unencrypted channels.
All 3 Dupage County records here have been checked against a primary source.
System and talkgroup counts come from this site's agency database and change without notice — confirm current status on RadioReference.
Encryption Technology Used in Dupage County
Encrypted Agencies in Dupage County
| Agency Name | Type | Encryption | Scope |
|---|---|---|---|
| DuPage County Police ✓ | Police | P25 AES-256 | Tactical Only |
| DuPage County Sheriff's Office ✓ | Sheriff | P25 AES-256 | Partially Encrypted |
| Naperville Police ✓ | Police | P25 AES-256 | Specific Channels |
Related Case Studies
Learn more about police radio encryption issues in Illinois.
Frequently Asked Questions
Is Dupage County police radio encrypted?
Agencies in Dupage County, Illinois have partial encryption on some channels, but are not fully encrypted.
Can I listen to Dupage County Sheriff on a scanner?
Check the specific agency encryption status below. Some channels may still be accessible.
How many police departments in Dupage County are encrypted?
2 police departments in Dupage County have implemented some level of encryption, along with 1 sheriff offices, 0 fire departments, and 0 EMS agencies.
What encryption technology does Dupage County use?
The most common encryption type in Dupage County is P25 AES-256, used by agencies for secure communications. This encryption blocks public scanner monitoring.
Fight Encryption in Dupage County
Join the movement to restore transparency to public safety communications in Dupage County, Illinois.