Cook County Sheriff/StarCom21 Node 5
Cook, Illinois
Encryption Details
Verified Talkgroup Data
View 8 talkgroups
| DEC | Alpha Tag | Description | Status |
|---|---|---|---|
| 2166 | Cook Ops 2166 | Operations 2166 | Encrypted |
| 2328 | Cook Ops 2328 | Operations 2328 | Encrypted |
| 25129 | Cook Metro North | Police: Dispatch-Des Plaines, Park Ridge (db Cook County Sheriff) | Encrypted |
| 25131 | Cook Law MetroSE | Police: Dispatch-Harvey, Phoenix [CK METRO SE] | Encrypted |
| 25233 | Cook Metro W | Police: Dispatch-Berkeley, Indian Head Park, Lyons [CK METRO W] | Encrypted |
| 3687 | Cook PD Net 24B | Winnetka, Kenilworth, Glencoe, Northfield Police (Glenview Dispatch); Wilmette Police | Encrypted |
| 25242 | Cook Law Metro S | Police: Dispatch-Blue Island, Hometown, Merrionette Park, Robbins [CK METRO S] | Encrypted |
| 25330 | Cook Metro SW | Police: Dispatch-Crestwood, Palos Park, Worth [CK METRO SW] | Encrypted |
Verification Status
We do have per-talkgroup data for Cook County Sheriff/StarCom21 Node 5 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 Cook County Sheriff/StarCom21 Node 5 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.
Cook County Context
Cook County Sheriff/StarCom21 Node 5 isn't an outlier here: 14 of the 19 public-safety agencies we track in Cook County are fully encrypted (74%), so most departments nearby have made the same move.
See every agency we track in Cook County → County encryption overview →
What This Means
Our records list a mix here: some talkgroups encrypted, others not. The listing is unverified, so confirm what is audible at RadioReference.
Frequently Asked Questions
Is Cook County Sheriff/StarCom21 Node 5 radio encrypted?
Our database lists Cook County Sheriff/StarCom21 Node 5 as using P25 AES-256 encryption, though this listing is unverified. Our records list a mix here: some talkgroups encrypted, others not. The listing is unverified, so confirm what is audible at RadioReference.
Can I listen to Cook County Sheriff/StarCom21 Node 5 on a police scanner?
Possibly. Our database lists Cook County Sheriff/StarCom21 Node 5 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 Cook County Sheriff/StarCom21 Node 5 encrypt their radio?
The reasons offered are almost always the same two: officer safety and operational security. Whether either was tested against a real Cook County incident is rarely part of the public record, whereas the consequences are easy to observe — no real-time accountability, and neighbouring agencies still in the clear left working around the gap.
Can Cook County reverse the encryption decision?
Yes — nothing about the underlying radio technology forces this. It's a decision Cook County officials made and can revisit, and other communities have pushed departments back toward open channels through sustained council pressure and coalition-building.
What can I do about Cook County Sheriff/StarCom21 Node 5 encryption?
Three things carry weight, in this order: a public-records request for Cook County Sheriff/StarCom21 Node 5's encryption policy and radio recordings, a turn at the microphone during Cook County budget discussions, and finding the other people locally already asking the same question. Individually these are easy to deflect; together they are not.