10-codes are standardized radio communication codes commonly used by law enforcement and emergency services to convey information quickly and clearly.

10-X — General Status
10-1X — Location & Response
10-2X — Personnel & Requests
10-3X — Emergencies
10-4X — Assistance
10-5X — Administrative
10-6X — Surveillance & Status
10-7X — Operations & Support
10-8X — Coordination & Security
10-9X — Critical & Tactical