Master the Waves of Communication: 2026 Police Radio Codes Practice Test – Decode, Protect, Thrive!

Code 4 means the situation is under control and no additional units are needed. This status communicates to dispatch and other units that the responders on scene have the incident contained and can wrap up or stand by. It helps allocate resources efficiently by signaling that backup isn’t required at that moment. The other options imply different realities—needing more units, not yet under control, or the area being fully cleared—so they don’t fit the typical meaning of Code 4. Keep in mind some agencies phrase things slightly differently, but the general idea remains: under control, no extra help required.