| Q-Signal/Code | Meaning |
| QRA [name] QRA? | The name of my station is [name]. What is your station name? |
| QRG [freq] QRG? | Your exact frequency is [freq]. What is my exact frequency? |
| QRH QRH? | Your frequency varies. Does my frequency vary? |
| QRI [tone] QRI? | The tone of your transmission is [tone]. How is the tone of my transmission? |
| QRK [readability] QRK? | The readability of your transmission is [readability]. How is the readability of my transmission? |
| QRL QRL? | I am busy (or, the frequency is in use). Are you busy? (or, is the frequency in use?) |
| QRM QRM? | Your transmission is being interfered with. Is my transmission being interfered with? |
| QRN QRN? | I am troubled by static. Are you troubled by static? |
| QRO QRO? | Increase your transmitting power. Shall I increase my transmitting power? |
| QRP QRP? | Decrease your transmitting power. Shall I decrease my transmitting power? |
| QRQ QRQ? | Send faster. Shall I send faster? |
| QRS QRS? | Send slower. Shall I send slower? |
| QRT QRT? | Stop sending. Shall I stop sending? |
| QRU QRU? | I have nothing for you. Do you have anything for me? |
| QRV QRV? | I am ready. Are you ready? |
| QRW QRW? | Please inform ... that I am calling him. Shall I tell ... that you're calling him? |
| QRX [time/freq] QRX? | I will call again at ... When will you call again? |
| QRZ QRZ? | I am calling you. Who is calling me? |
| QSA [signal] QSA? | Your signal strength is [signal]. What is my signal strength? |
| QSB QSB? | Your signals are fading. Are my signals fading? |
| QSD QSD? | Your keying is defective. Is my keying defective? |
| QSG [number] QSG [number]? | Send [number] messages at a time. Shall I send [number] messages at a time? |
| QSK QSK? | I can work break-in. Can you work break-in? |
| QSL QSL? | I acknowledge receipt. Can you acknowledge receipt? |
| QSM QSM? | Repeat the last message sent. Shall I repeat the last message sent? |
| QSO QSO? | I can communicate with ... direct. Can you communicate with ... direct? |
| QSP QSP? | I will relay to ... Can you relay to ... ? |
| QSV QSV? | I will send a series of V's. Shall I send a series of V's? |
| QSW [freq] QSW [freq]? | I will transmit on [freq]. Will you transmit on [freq]? |
| QSX QSX? | I will listen for ... on [freq]. Will you listen for ... on [freq]? |
| QSY [freq] QSY [freq]? | I will change frequency (to [freq]). Will you change frequency (to [freq])? |
| QSZ [number] QSZ [number]? | Send each word/group twice (or [number] times). Shall I send each word/group twice (or [number] times). |
| QTA [number] QTA [number]? | Cancel number [number]. Shall I cancel number [number]? |
| QTB QTB? | I do not agree with your word count. Do you agree with my word count? |
| QTC [number] QTC? | I have [number] messages to send. How many messages have you to send? |
| QTH QTH? | My location is ... What is your location? |
| QTR QTR? | My time is ... What is your time? |
| QTV QTV? | Stand guard for me. Shall I stand guard for you? |
| QTX QTX? | I will keep my station open for further communication with you. Will you keep your station open for further communication with me? |
| QUA QUA? | I have news regarding ... Have you news regarding ... ? |