The following is a comprehensive list adopted from the Expanded APCO 10 Codes. While some of these codes are used, many are rarely used, and some have likely been phased-out.
Troopers always begin their transmission with the Regional Dispatch Center they are calling, followed by call sign, followed by their request/info. (i.e. “Denver 1 Adam 17 clear PA” means unit 1 Adam 17 is calling Denver Dispatch to advise he/she finished their traffic stop with a penalty assessment).
10 Codes
- 10-1: Unable To Copy
- 10-2: Signals Good
- 10-3: Stop Transmitting
- 10-4: Acknowledgement
- 10-5: Relay
- 10-6: Busy Stand-By
- 10-7: Out Of Service
- 10-8: In Service
- 10-9: Repeat
- 10-10: Fight In Progress
- 10-11: Dog Case
- 10-12: Stand By (stop)
- 10-13: Weather & Road Report
- 10-14: Report Of Prowler
- 10-15: Civil Disturbance
- 10-16: Domestic Trouble
- 10-17: Meet Complainant
- 10-18: Complete Assignment Quickly
- 10-19: Return To ___
- 10-20: Location
- 10-21: Call ___ By Telephone
- 10-22: Disregard
- 10-23: Arrived At Scene
- 10-24: Assignment Completed
- 10-25: Report In Person To ___
- 10-26: Detaining Subject
- 10-27: Driver’s License Information
- 10-28: Vehicle Registration
- 10-29: Check Records For Want
- 10-30: Unauthorized Use Of Radio
- 10-31: Crime In Progress
- 10-32: Person With Gun
- 10-33: Emergency
- 10-34: Riot
- 10-35: Major Crime Alert
- 10-36: Correct Time
- 10-37: Suspicious Vehicle
- 10-38: Stopping Suspicious Vehicle
- 10-39: Urgent (light/siren)
- 10-40: Silent Run
- 10-41: Beginning Tour Of Duty
- 10-42: Ending Tour Of Duty
- 10-43: Information
- 10-44: Request Permission To Leave Patrol
- 10-45: Animal Carcass In Road
- 10-46: Assist Motorist
- 10-47: Emergency Road Repairs Needed
- 10-48: Traffic Standard Repair
- 10-49: Traffic Light Out
- 10-50: Traffic Accident, F: Fatality, PI: Personal Injury, PD: Property Damage
- 10-51: Wrecker Needed
- 10-52: Ambulance Needed
- 10-53: Road Blocked
- 10-54: Livestock On Highway
- 10-55: Intoxicated Driver
- 10-56: Intoxicated Person
- 10-57: Hit & Run, F: Fatality, PI: Personal Injury, PD: Property Damage
- 10-58: Direct Traffic
- 10-59: Convoy Or Escort
- 10-60: Squad In Vicinity
- 10-61: Personnel In Area
- 10-62: Reply To Message
- 10-63: Prepare To Make Written Copy
- 10-64: Attention on the Radio for an Important Broadcast
- 10-65: Net Message Assignment
- 10-66: Message Cancellation
- 10-67: Clear To Read Net Message
- 10-68: Dispatch Information
- 10-69: Message Received
- 10-70: Fire Alarm
- 10-71: Advise Nature Of Fire (size, type, contents of building)
- 10-72: Report Progress On Fire
- 10-73: Smoke Report
- 10-74: Negative
- 10-75: In Contact or Traffic Stop
- 10-76: En Route
- 10-77: ETA
- 10-78: Need Assistance
- 10-79: Notify Coroner
- 10-82: Reserve Lodging
- 10-84: If Meeting, Advise ETA
- 10-85: Will Be Late
- 10-87: Pick Up Checks For Distribution
- 10-88: Advise Telephone # Of ____
- 10-90: Bank Alarm
- 10-91: Unnecessary Use Of Radio
- 10-93: Blockade
- 10-94: Drag Racing
- 10-95: In Custody (i.e. “55, 95” means a person is now in custody for suspicion of DUI)
- 10-96: Mental Subject
- 10-98: Prison/Jail Break
- 10-99: Records Indicate Wanted/Stolen
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