Resources > 10 Codes > Standard APCO 10 Codes
10 Codes
Standard APCO 10 Codes

The following list illustrates the current usage of various 10-codes. Some codes are standardized through the country, while others can have completely different meanings. The most common meanings are listed below.

Alternate meanings for the same code are separated by bullets. The first bold definition is the current APCO standard. Common alternate meanings follow in bold. Less common meanings are in regular typeface. Meanings specific to CB radio are set in italics.

Code Description
10-0
  • use caution
10-1
  • poor reception
10-2
  • good reception
10-3
  • stop transmitting
  • change channels
10-4
  • message received, affirmative, ok, understood
10-5
  • relay this information to ___
10-6
  • busy
10-7
  • out of service
10-8
  • in service
10-9
  • please repeat your message
Code Description
10-10
  • fight in progress, out of service
  • negative
  • transmission completed
  • welfare check
10-11
  • animal problem
  • talking too fast
  • en route
10-12
  • standby
  • visitors present
  • disregard
  • call in reports
  • at scene
  • check revocation
10-13
  • advise weather/road conditions
  • civilians present and listening
  • call-in resume
10-14
  • suspicious person or prowler
  • convoy or escort
10-15
  • civil disturbance
  • prisoner/suspect in custody
10-16
  • domestic disturbance
  • make pickup at ___
10-17
  • meet complainant
  • pick up papers at ___
  • urgent business
10-18
  • urgent
  • complete assignment ASAP
  • anything for us?
  • drunk
10-19
  • return to station
Code Description
10-20
  • specify location/my location is ___
10-21
  • please telephone ___
10-22
  • disregard
  • report to ___
  • send blood technician
10-23
  • arrived at location/on scene
  • stand by on this frequency
  • status check
  • en route to call
  • sex offense
10-24
  • assignment completed
  • trouble at station
  • unit not available
  • direct traffic
10-25
  • report to ___
  • please contact ___
  • do you have contact with person
  • come in for traffic
  • officer needs help
10-26
  • detaining suspect (implying "please expedite")
  • check auto registration
  • ETA ___
  • disregard last info
  • phone residence
10-27
  • drivers license request
  • vehicle registration request
  • I am moving to channel ___
  • any answer
10-28
  • vehicle registration request
  • driver's license request
  • identify your station
  • missing person
10-29
  • arrests/warrants request
  • time is up for contact
Code Description
10-30
  • unauthorized use of radio
  • danger/caution
  • special check at ___
  • juvenile
10-31
  • crime in progress
  • domestic disturbance
  • check for local warrants
  • suspicious person
10-32
  • person with gun
  • fight in progress
  • radio check
  • check NCIC
  • DWI test
10-33
  • emergency, all units stand by
  • officer needs help
  • disturbance at ___
  • fire
10-34
  • riot
  • frequency open (cancels 10-33)
  • help needed
  • trouble at jail
  • correct time
  • meet officer
10-35
  • major crime alert
  • confidential information
  • suspicious person
10-36
  • correct time of day?
10-37
  • suspicious vehicle
  • identify yourself
  • wrecker needed at ___
  • shoplifter
  • time of day?
10-38
  • stopping suspicious vehicle
  • ambulance needed
  • station report satisfactory
  • phone communications
  • vandalism
10-39
  • run with lights & siren
  • your message was delivered
  • false alarm, premises were occupied
  • contact officer
  • disturbance
Code Description
10-40
  • run silent (no lights & siren)
  • false alarm, no activity, premises appears secure
  • please tune to channel ___
  • expedite
  • advise if available
  • suspicious person
  • dead animal
  • mental patient
  • lunch
10-41
  • begin duty
  • radio test
  • intoxicated person
  • debris in street
  • neighbor trouble
10-42
  • end duty
  • traffic accident at ___
  • malicious mischief
  • request dispatch times
10-43
  • information
  • traffic jam at ___
  • request criminal history
  • pick up passenger
  • armed robbery
  • rescue call
10-44
  • permission to leave patrol
  • I have a message for you
  • transmission received
  • rape
  • traffic accident (no injury)
10-45
  • animal carcass
  • pick up officer
  • fueling vehicle
  • all units in range please report
  • coffee break
  • traffic accident (injury)
  • non-injury accident ()
10-46
  • motorist assist
  • lunch break
  • fuel break
  • wrecker
  • injury accident ()
10-47
  • emergency road repair
  • call home
  • missing person
  • drunk driver
  • blood run
  • license plate check ()
10-48
  • traffic control
  • request criminal history
  • runaway juvenile
  • use caution
10-49
  • traffic light out
  • en route to assignment
  • bathroom break
  • any traffic
  • serving warrant
Code Description
10-50
  • accident
  • no messages
  • break channel
  • auto accident with property damage
10-51
  • wrecker needed
  • auto accident with injuries
  • phone message
10-52
  • ambulance needed
  • fatal auto accident
  • message for assignment
  • alarm
10-53
  • road blocked
  • silent alarm
10-54
  • animals on highway
  • silent pursuit
  • car stop
10-55
  • intoxicated driver or DWI
  • security check
  • ambulance call
10-56
  • intoxicated pedestrian
  • warrant indicated
  • arrived at scene
10-57
  • hit & run accident
  • narcotics
  • officer at pistol range
10-58
  • direct traffic
  • wrecker
  • DOA
  • teleprinter message
10-59
  • escort or convoy
  • out of car checking violation
  • ambulance
  • bomb threat
Code Description
10-60
  • squad in vicinity
  • traffic stop
  • what is next message number?
  • coffee break
  • assist motorist
10-61
  • personnel in vicinity
  • stand by for CW traffic
  • clear of traffic stop
  • weather conditions?
  • lunch break
10-62
  • reply to message
  • unable to copy, use phone
  • check for rising water
  • logged on/off
10-63
  • prepare to copy
  • make written copy
  • net directed to ___
  • need barricades
10-64
  • local message
  • message for delivery
  • net clear, resume normal traffic
  • field investigator
10-65
  • net message assignment
  • kidnapping
10-66
  • net message cancellation
  • bathroom break
10-67
  • clear for next message
  • prepare to copy
  • person calling for help
  • all units comply
10-68
  • dispatch message
  • repeat dispatch
  • switch channels
10-69
  • message received
  • any calls holding for me?
  • sniper
Code Description
10-70
  • fire alarm
  • fire
  • fire followup
  • prowler
  • net message
  • chemical spill
10-74
  • negative
10-76
  • enroute to location
  • fresh coffee
10-78
  • need assistance
  • major accident with injury
  • request wrecker
10-79
  • notify coroner
  • bomb threat
  • hit & run
Code Description
10-80
  • pursuit in progress
  • bomb has exploded
  • tower lights out
  • on assignment
  • demonstration
10-81
  • breathalyzer request
  • stop for interrogation
  • reserve hotel room
  • officer ___ will be at your station
  • at vehicle maintenance
  • civil disturbance/riot
10-82
  • reserve lodging
  • stop for interrogation/arrest
  • traffic signal out
  • cover assistance
10-83
  • work/school crossing detail
  • call station
  • units stop transmitting
  • at radio shop
  • officer in trouble
10-84
  • advise ETA
  • checking officer status
  • my telephone number is ___
  • follow-up
  • broken utility main
10-85
  • arrival delay due to ___
  • prepare to copy info
  • my address is ___
  • loose livestock
10-86
  • officer on-duty
  • utility line down
10-87
  • pickup or prisoner transfer
  • pickup payroll check
  • dead body
10-88
  • advise telephone
  • station call
  • special assignment
  • true alarm
10-89
  • bomb threat
  • send radio repair
  • officer at academy
Code Description
10-90
  • bank alarm
  • radio repair to be at station
  • officer at headquarters
  • false alarm
10-91
  • pick up prisoner/suspect
  • talk closer to the mike
  • prepare your inspection
  • vehicle fuel
  • bank holdup alarm
10-92
  • parking violation
  • your signal is weak
  • officer at court
10-93
  • blockage
  • please check my frequency
10-94
  • street racing
  • give me a long count
10-95
  • prisoner/suspect in custody
  • transmit dead carrier for 5 seconds
10-96
  • mental patient
  • detain prisoner/suspect
10-97
  • test signal
  • arrived at scene
  • possible wanted person in vehicle
  • known offender
  • officer at court
10-98
  • prison/jail break
  • criminal history indicated
  • officer at juvenile court
  • assignment complete
10-99
  • warrants/stolen indicated
  • officer needs assistance/held hostage
  • mission complete
  • bathroom break
Code Description
10-100
  • bathroom break
  • dead body
10-200
  • police needed
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