10-Code Communication Guide

Ten-codes, also called ten-signals, are abbreviations used to shorten common phrases in radio communications. Thus allowing for brevity and standardization of messages.  They have been widely used by law enforcement, and in Citizens Band (CB) radio transmissions.

The codes were developed in 1937, and expanded in 1974, by the Association of Public-Safety Communications Officials-International (APCO).   Ten-codes remain in common use, but have been phased out in some areas in favor of plain language.

10-1 Receiving Poorly
10-2 Receiving Well
10-3 Stop Transmitting
10-4 OK, Message Received
10-5 Relay Message
10-6 Busy, Stand By
10-7 Out of Service, Leaving Air
10-8 In Service, subject to call
10-9 Repeat Message
10-10 Transmission Completed, Standing By
10-11 Talking too Rapidly
10-12 Visitors Present
10-13 Advise weather and road conditions
10-16 Make Pickup at…...
10-17 Urgent Business
10-18 Anything for us?
10-19 Nothing for you, return to base
10-20 My Location is ......... or What's your Location?
10-21 Call by Telephone
10-22 Report in Person too ......
10-23 Stand by
10-24 Completed last assignment
10-25 Can you Contact .......
10-26 Disregard Last Information/Cancel Last Message
10-27 I am moving to Channel ......
10-28 Identify your station
10-29 Time is up for contact
10-30 Does not conform to FCC Rules
10-32 I will give you a radio check
10-33 Emergency Traffic at this station
10-34 Trouble at this station, help is needed
10-35 Confidential Information
10-36 Need correct time
10-37 Wrecker needed at …...
10-38 Ambulance needed at .........
10-39 Your message delivered
10-41 Please tune to channel ........
10-42 Traffic Accident at ..........
10-43 Traffic tied up at .........
10-44 I have a message for you
10-45 All units within range please report
10-50 Break Channel
10-60 What is next message number?
10-62 Unable to copy, use phone
10-65 Awaiting your next message or assignment
10-67 All units comply
10-70 Fire at .......
10-71 proceed with transmission in sequence
10-73 Speed Trap at ............
10-75 You are causing interference
10-77 Negative Contact
10-84 My telephone number is .........
10-85 My address is ...........
10-91 Talk closer to the Mike
10-92 Your transmitter is out of adjustment
10-93 Check my frequency on this channel
10-94 Please give me a long count
10-95 Transmit dead carrier for 5 seconds
10-99 Mission completed, all units secure
10-100 Need to go to Bathroom
10-200 Police needed at ..........