Q-codes are shorthand codes that come from the world of CW. Q-signals or codes are a set of abbreviations for common radio information that can help save time and allow communication between operators who don’t speak a common language. Modern ham radio uses them extensively. The table below lists the most common Q-signals used by hams.
| Code | Question | Answer or Statement |
| QNI | May I join the net? | You may check in… |
| QRA | What is the name (or call sign) of your station? | The name (or call sign) of my station is … |
| QRG | Will you tell me my exact frequency (or that of …)? | Your exact frequency (or that of … ) is … kHz (or MHz). |
| QRH | Does my frequency vary? | Your frequency varies. |
| QRI | How is the tone of my transmission? | The tone of your transmission is (1. Good; 2. Variable; 3. Bad) |
| QRJ | How many voice contacts do you want to make? | I want to make … voice contacts. |
| QRK | What is the readability of my signals (or those of …)? | The readability of your signals (or those of …) is … (1 to 5). |
| QRL | Are you busy? | I am busy. (or I am busy with … ) Please do not interfere. |
| QRM | Do you have interference? [from other stations] | I have interference. |
| QRN | Are you troubled by static? | I am troubled by static. |
| QRO | Shall I increase power? | Increase power. |
| QRP | Shall I decrease power? | Decrease power. |
| QRQ | Shall I send faster? | Send faster (… wpm) |
| QRS | Shall I send more slowly? | Send more slowly (… wpm) |
| QRT | Shall I cease or suspend operation?/ shutoff the radio | I am suspending operation. /shutting off the radio |
| QRU | Have you anything for me? | I have nothing for you. |
| QRV | Are you ready? | I am ready. |
| QRW | Shall I inform … that you are calling him on … kHz (or MHz)? | Please inform … that I am calling him on … kHz (or MHz). |
| QRX | Shall I standby / When will you call me again? | Please standby / I will call you again at … (hours) on … kHz (or MHz) |
| QRZ | Who is calling me? | You are being called by … on … kHz (or MHz) |
| QSA | What is the strength of my signals (or those of … )? | The strength of your signals (or those of …) is … (1 to 5). |
| QSB | Are my signals fading? | Your signals are fading. |
| QSD | Is my keying defective? | Your keying is defective. |
| QSG | Shall I send … telegrams (messages) at a time? | Send … telegrams (messages) at a time. |
| QSK | Can you hear me between your signals? | I can hear you between my signals. |
| QSL | Can you acknowledge receipt? | I am acknowledging receipt. |
| QSM | Shall I repeat the last telegram (message) which I sent you, or some previous telegram (message)? | Repeat the last telegram (message) which you sent me (or telegram(s) (message(s)) numbers(s) …). |
| QSN | Did you hear me (or … (call sign)) on .. kHz (or MHz)? | I did hear you (or … (call sign)) on … kHz (or MHz). |
| QSO | Can you communicate with … direct or by relay? | I can communicate with … direct (or by relay through …). |
| QSP | Will you relay a message to …? | I will relay a message to … . |
| QSR | Do you want me to repeat my call? | Please repeat your call; I did not hear you. |
| QSS | What working frequency will you use? | I will use the working frequency … kHz (or MHz). |
| QST | Should I repeat the prior message to all amateurs I contact? | Here follows a broadcast message to all amateurs. |
| QSU | Shall I send or reply on this frequency (or on … kHz (or MHz))? | Send or reply on this frequency (or on … kHz (or MHz)). |
| QSW | Will you send on this frequency (or on … kHz (or MHz))? | I am going to send on this frequency (or on … kHz (or MHz)). |
| QSX | Will you listen to … (call sign(s) on … kHz (or MHz))? | I am listening to … (call sign(s) on … kHz (or MHz)) |
| QSY | Shall I change to transmission on another frequency? | Change to transmission on another frequency (or on … kHz (or MHz)). |
| QSZ | Shall I send each word or group more than once? | Send each word or group twice (or … times). |
| QTA | Shall I cancel telegram (message) No. … as if it had not been sent? | Cancel telegram (message) No. … as if it had not been sent. |
| QTC | How many telegrams (messages) have you to send? | I have … telegrams (messages) for you (or for …). |
| QTH | What is your position in latitude and longitude (or according to any other indication)? | My position is … latitude…longitude |
| QTR | What is the correct time? | The correct time is … hours |
| QTU | At what times are you operating? | I am operating from … to … hours. |
| QTX | Will you keep your station open for further communication with me until further notice (or until … hours)? | I will keep my station open for further communication with you until further notice (or until … hours). |
| QUA | Have you news of … (call sign)? | Here is news of … (call sign). |
| QUC | What is the number (or other indication) of the last message you received from me (or from … (call sign))? | The number (or other indication) of the last message I received from you (or from … (call sign)) is … |
| QUD | Have you received the urgency signal sent by … (call sign of mobile station)? | I have received the urgency signal sent by … (call sign of mobile station) at … hours. |
| QUE | Can you speak in … (language), – with interpreter if necessary; if so, on what frequencies? | I can speak in … (language) on … kHz (or MHz). |
| QUF | Have you received the distress signal sent by … (call sign of mobile station)? | I have received the distress signal sent by … (call sign of mobile station) at … hours. |