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 don't yet have per-talkgroup data for Cook County Sheriff/StarCom21 Node 5 from the RadioReference API. The encryption scope and type above come from the RadioReference Wiki, which is community-maintained rather than independently confirmed channel-by-channel. Our automated matching put this at moderate confidence (70%) based on how closely the wiki listing matches this agency's name and county.
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: 19 of the 19 public-safety agencies we track in Cook County are fully encrypted (100%), 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 every channel this agency runs as encrypted, including day-to-day dispatch. That listing hasn't been verified against live talkgroup data, so confirm it at RadioReference before relying on it.
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 every channel this agency runs as encrypted, including day-to-day dispatch. That listing hasn't been verified against live talkgroup data, so confirm it at RadioReference before relying on it.
Can I listen to Cook County Sheriff/StarCom21 Node 5 on a police scanner?
Likely not, if the listing is accurate: our database lists Cook County Sheriff/StarCom21 Node 5 as fully encrypted using P25 AES-256, which no consumer scanner can decode. The listing is unverified — check the live RadioReference database for current 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.