Radio Codes
Select Agency / Region
National Standard
Original APCO Project 14 codes. Many agencies have modified these locally.
10-1Receiving poorly
10-2Receiving well
10-3Stop transmitting
10-4Message received / OK
10-5Relay message
10-6Busy — stand by unless urgent
10-7Out of service
10-8In service / available
10-9Repeat last transmission
10-10Negative / out of service
10-11On duty
10-12Stand by
10-13Existing conditions
10-14Message / information
10-15Message delivered
10-16Reply to message
10-17En route
10-18Urgent
10-19Contact / return to
10-20Location
10-21Phone contact
10-22Disregard
10-23Arrived at scene
10-24Assignment complete
10-25Report to / meet
10-26Estimated arrival time
10-27License / permit info
10-28Ownership info
10-29Records check
10-30Danger / caution
10-31Pick up
10-32Units needed
10-33Help needed — emergency
10-34Time
10-35Major crime alert
10-36Correct time
10-37Identify operator
10-38Identify your station
10-39Equipment out of service
10-40Sleeping quarters needed