| Code | QUESTION | REPLY OR MESSAGE |
| QRG | What is the exact frequency? | The exact frequency is… |
| QRK | What is the intelligibility of my signal? | Your signal intelligibility is: 1: poor, 2: comparatively poor, 3: fair, 4: good, 5: excellent. |
| QRL | Are you busy? Is the frequency in use? | I’m busy. The frequency is in use. |
| QRM | Having interference? | I have interference. 1: no disturbances, 2: weak, 3: moderate, 4: strong, 5: very strong. |
| QRN | Are you bothered by atmospheric disturbances? | Atmospheric disturbances are bothering me. 1: no disturbances, 2: weak, 3: moderate, 4: strong, 5: very strong. |
| QRO | Should I increase the power? | Increase the power. |
| QRP | Reduce power? | Reduce power. |
| QRS | Should I lower the baud rate? | Reduce the baud rate. |
| QRT | Stop broadcasting? | Stop broadcasting. |
| QRU | Do you have anything for me? | I have nothing for you. |
| QRV | Are you ready? | I’m ready. |
| QRX | When will you call me again? | I’ll call you back to… Also: wait, stay like this. |
| QRZ | Who’s calling me? | Calling you… |
| QSA | What is my signal strength? | Your signal strength is: 1: poor, 2: fairly poor, 3: fair, 4: good, 5: excellent. |
| QSB | Is there fading in my signal? | There is fading in your signal. |
| QSL | Will you confirm acceptance? | I confirm acceptance. |
| QSO | Can you connect with… (me)? | I can connect with… (you). |
| QSX | Can you listen on…? | Listening to… |
| QSY | Start transmission on another frequency? | Start transmission on… Also: change frequency on… |
| QTC | Do you have a message for me? | I have a message for you. |
| QTH | What is your location (latitude and longitude or name)? | My location is …latitude and …longitude or: my location name is… |
| QTR | What is the exact time? | The exact time is… |
