Most important Q-codes and fusion characters:
| AR | End of transmission: indicates the end of a transmission that is not addressed to anyone in particular (for example, after the end of CQ). |
| K | Over for you: end of the current broadcast in a conversation between two or more stations |
| KN | Over just for you: similar to “K”, but emphasizes that you don’t want to listen to any of the other stations. |
| SK | End of QSO: used at the end of a QSO. |
| CL | Turning off the station: the last code before you turn off your station. Submitted in a merged manner. |
| QRL? | Is the frequency in use?: you should always transmit it before you have called CQ on a new frequency. |
| QRZ? | Who’s calling me? QRZ has no other meaning! |
| QRS | Reduce the baud rate. |
| AS | One moment, hold on. |
| = | I’m thinking right now and I haven’t stopped streaming. (Also used as a separator between individual parts of the text). |
