Colorado 10-Codes

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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