Radio Codes

Because two-way radios or walkie-talkies operate in half duplex mode, you cannot speak and listen at the same time, radio codes were invented to keep the conversation short and to the point.

Common List of 2-Way Radio Codes

  • 10-1 Receiving Poorly
  • 10-2 Receiving Well
  • 10-3 Disregard Last Information
  • 10-4 O.K., Message Understood
  • 10-5 Relay Message
  • 10-6 Busy, Stand By
  • 10-7 Out of Service
  • 10-8 In Service
  • 10-9 Repeat – Conditions Bad
  • 10-18 Anything for Us?
  • 10-19 Nothing for you
  • 10-20 What is your Location?
  • 10-23 Arrived with last Assignment
  • 10-36 What time is it?
  • QRX Stand By
  • QRU Are you O.K.
  • QSL O.K.
  • QTH Location
  • QSM Repeat Message, I didn’t Receive
  • QRM Repeat Message, you have Static