Which 10-code means Advise officers to report?

• A. 10-24
• B. 10-27
• C. 10-22
• D. 10-21

Answer: (C)

In radio communication, 10-codes are shorthand commands used to convey actions quickly. This item tests you on which code specifically signals that officers should report in. The correct code is the one that directly communicates a directive to all units to come in and check in, or to report to a designated location. That code is used to coordinate a group response and ensure everyone knows they’re expected to acknowledge and report.

Why this fits best: it is a direct instruction aimed at obtaining a timely roll call or status from officers. It’s concise and unambiguous under pressure, which is exactly what dispatch needs when coordinating multiple units.

The other codes in the set point to different tasks—such as completing an assignment, looking up a driver’s license, or initiating a phone check—and do not carry the same instruction to report. Remember, since 10-codes can vary by agency, always verify your department’s specific list.