Madison County IL Dispatch Flips to Encryption on StarCom21
Multiple Madison County, Illinois police dispatch systems in the St. Louis "Metro East" are being switched to encryption this week on the statewide StarCom21 Project 25 network, according to the RadioReference database change log. Alton, Wood River, Granite City, Edwardsville and surrounding towns are losing live police dispatch across a whole multi-PSAP region — with the changes still rolling in as of early September 2026.
What the RadioReference Change Log Shows
The RadioReference database change log for Madison County, Illinois shows encryption settings being applied to police dispatch talkgroups on StarCom21 repeatedly through late August and into September 2026. Updates touched the Alton/Wood River Dispatch, Sheriff/Law/Government, Edwardsville/SIUE, and Glen Carbon (GlenCom) PSAP categories as recently as September 5–7, 2026.
New Talkgroups Signal the Switch Is Active
On September 7, admins added talkgroup 7911 "East Alton/Bethalto Police: Dispatch (FUTURE)" and a wave of "Testing" and "Field Testing" talkgroups (29141–29175) were activated through September 3–7 — a pattern that typically means new encrypted dispatch is being brought online right now. A separate September 5 update also applied encryption settings to Madison County Fire/EMS talkgroups.
What the Scanner Community Is Reporting
Granite City PD and the county's new P25 system are reported to be turning encryption on across police, fire and EMS channels, per the DownstateILscanner community. This is community corroboration of the RadioReference log rather than a formal agency press release, so exact timetables should be treated as in-progress.
Which Towns Are Affected
For scanner listeners in the St. Louis Metro East — Alton, Granite City, Wood River, East Alton, Edwardsville, Bethalto, and Collinsville — analog and non-keyed P25 radios stand to lose live police dispatch across an entire region of the county's public-safety answering points.
What Encryption Means for Your Scanner
Encrypted P25 dispatch can't be heard on consumer scanners, no matter how advanced. When a talkgroup flips to encryption, the scanner either goes silent or skips the channel entirely. Madison County's move follows a national wave of agencies going dark — the accountability gap between agencies and the public keeps widening as more regions encrypt.
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FAQ
Why is Madison County, Illinois police dispatch being encrypted?
The RadioReference change log shows encryption settings being applied to StarCom21 police dispatch talkgroups through late August and into September 2026. This is part of a broader national move by agencies to lock down dispatch, though Madison County's agencies have not issued a formal public statement.
What is StarCom21?
StarCom21 is Illinois' statewide Project 25 (P25) trunked radio network used by police, fire and EMS agencies. When a talkgroup is encrypted on StarCom21, consumer scanners can no longer receive it.
Which Madison County towns are affected?
Alton, Wood River, Granite City, East Alton, Edwardsville, Bethalto and Collinsville are among the Metro East communities affected, along with the Sheriff/Law/Government and Glen Carbon (GlenCom) PSAP categories.
Can I still listen to Madison County after encryption?
Once dispatch talkgroups are encrypted, standard consumer scanners cannot decode them. Some agencies may keep limited open channels or post updates elsewhere, but live dispatch access is lost.
How do I know if my scanner can hear the switch happening?
During the testing phase, you may hear "Testing" or "Field Testing" talkgroups (29141–29175) or field-test traffic. Once full encryption is applied, the dispatch channel goes silent on non-keyed radios.
Bottom line: Madison County's Metro East police dispatch is flipping to encryption on StarCom21 in real time, joining a national wave that leaves listeners without live access. If your region still has open channels, they may not stay open for long.
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