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Your local channel keeps you connected to verified officers nearby. Speak directly with the people on the ground when something changes.
OnSiren gives security officers real-time threat intelligence and connects them with the officers around them.
A safer community starts with a connected security frontline.
Meet Alpha One
Alpha One scans the local feed, police appeals, threat information and reports from officers nearby. It sends daily briefs, alerts you when something changes, and keeps you connected on the radio.
Suspicious Activity
Two males refused entry at the door just now — aggressive with my colleague, wouldn’t give ID. They’ve gone north past the station, one in a grey hoodie, one in a red cap. Eyes out if they come your way.
SIERRA07
9 OFFICERS
Advisory
Two males refused entry at a Westminster venue, reported heading north on foot. Do not approach. Report any further sightings.
Active · Westminster channel
Your local channel keeps you connected to verified officers nearby. Speak directly with the people on the ground when something changes.

Send an alert in seconds. Nearby officers can see what you’ve seen, helping build a shared picture that keeps people safer.

It keeps watch on your local picture, sends your daily brief, and alerts you when something changes, so you stay informed, connected and ready.
Verified SIA-licensed officers are the eyes and ears on the ground. Their alerts, radio traffic and local picture give your force timely intelligence when it matters.


Send targeted advisories and be-on-the-lookout notices to the areas that need them. Keep the connected frontline informed as the picture changes.

Connect the security officers already working across your borough. Turn their shared alerts and local intelligence into a stronger picture for policing. Your own units are never shown on the map.
Send clear, targeted instructions to the people who need them. Evacuate, move to a safe place, lockdown or all-clear. Help your team act quickly and consistently.


Receive relevant updates from frontline officers and local advisories, helping your team build the picture before and during an incident.
Create controlled channels for the people responsible for your procedures. Keep the right teams informed, aligned and ready to act.
Be among the first officers on the network in your area. Reserve your call sign and we’ll have it waiting the moment your city goes live.
Use the arrows or search to browse call signs. Use this same phone number when you sign up to the OnSiren app.