Police Department Fully Encrypted
Ann Arbor Police
Washtenaw, Michigan
Encryption Details
Encryption Type P25 DES-OFB
Scope Detectives are encrypted
Technical Details P25 DES-OFB
Verified Talkgroup Data
Verified Mar 6, 2026 Moderate confidence
74 Total Talkgroups
9 Encrypted
65 Unencrypted
12% Encrypted
Radio System: ComSource Michigan DMR, Michigan's Public Safety Communications System (MPSCS)
View 9 talkgroups
| DEC | Alpha Tag | Description | Status |
|---|---|---|---|
| 137 | 33START1 | Lansing Police START channel 1 | Encrypted |
| 138 | 33START2 | Lansing Police START channel 2 | Encrypted |
| 12310 | 81 AAPD CAR | Ann Arbor City: Car-to-Car | Encrypted |
| 12312 | 81 AAPD DB | Ann Arbor Police Detective Bureau | Encrypted |
| 22205 | 25PAT1 | Patriot Ambulance Service Channel 1 Dispatch | Encrypted |
| 22364 | 903PDCAR | Ann Arbor: DPSS Car-to-Car | Encrypted |
| 42272 | 343DPD2E | Dearborn/Melvindale Police 2 | Encrypted |
| 42275 | 343DPD3E | Dearborn/Melvindate Police 3 | Encrypted |
| 42284 | 343DPD1E | Dearborn/Melvindale Police Dispatch (Future Use) | Encrypted |
What This Means
This agency encrypts all of their radio communications, including routine dispatch. The public, journalists, and even other first responders cannot monitor their activities.
Impact on Transparency
- Journalists cannot monitor police activity for breaking news or investigative reporting
- Community members cannot track police response to incidents in their neighborhood
- Researchers cannot study police communication patterns and response times
- Other first responders may face interoperability challenges during emergencies
Take Action
Fight encryption at Ann Arbor Police. Contact local officials to demand transparency.
Ann Arbor Police Washtenaw, Michigan
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