Q Codes commonly used by radio amateurs:
| Code | Meaning | Sample use |
| QRG | Exact frequency | HE TX ON QRG 14205 kHz |
| QRI | Tone (T in the RST code) | UR QRI IS 9 |
| QRK | Intelligibility (R in the RST code) | UR QRK IS 5 |
| QRL | This frequency is busy. | Used almost exclusively with Morse code, usually before transmitting on a new frequency |
| QRM | Man-made interference | ANOTHER QSO UP 2 kHz CAUSING LOT OF QRM |
| QRN | Natural interference, e.g. static crashes | BAND NOISY TODAY LOT OF QRN |
| QRO | Increase power | NEED QRO WHEN PROP POOR |
| QRP | decrease power | QRP TO 5 W |
| QRQ | Send faster | TIME SHORT PSE QRQ |
| QRR | temporarily unavailable/away, please wait | WILL BE QRR 30 MIN = THAT STN IS QRR NW |
| QRRR | Distress | Distress call recommended by ARRL |
| QRS | Send slower | PSE QRS NEW TO CW |
| QRT | Stop sending | ENJOYED TALKING 2 U = MUST QRT FER DINNER NW |
| QRU | Have you anything for me? | QRU? ABOUT TO QRT |
| QRV | I am ready | WL U BE QRV IN UPCOMING CONTEST? |
| QRX | will call you again | QRX @ 1500H |
| QRZ | You are being called by ________. | QRZ? UR VY WEAK (Only someone who has previously called should reply) |
| QSA | Signal strength | UR QSA IS 5 |
| QSB | Fading of signal | THERE IS QSB ON UR SIG |
| QSD | Your keying is defective | QSD CK YR TX |
| QSK | Break-in | I CAN HR U DURING MY SIGS PSE QSK |
| QSL | I Acknowledge receipt | QSL UR LAST TX = PSE QSL VIA BURO (i.e. please send me a card confirming this contact). |
| QSM | Repeat last message | QRM DROWNED UR LAST MSG OUT = PSE QSM |
| QSN | I heard you | QSN YESTERDAY ON 7005 kHz |
| QSO | A conversation | TNX QSO 73 |
| QSP | Relay | PSE QSP THIS MSG TO MY FRIEND |
| QST | General call to all stations | QST: QRG ALLOCS HV CHGD |
| QSX | I am listening on … frequency | QSX 14200 TO 14210 kHz |
| QSY | Shift to transmit on … | LETS QSY UP 5 kHz |
| QTA | Disregard last message | QTA, DID NOT MEAN THAT |
| QTC | Traffic | STN WID EMRG QTC PSE GA |
| QTH | Location | QTH IS SOUTH PARK CO |
| QTR | Exact time | QTR IS 2000 Z |