Ham Radio Q Codes
Quick Answer
Learn common ham radio Q codes including QSL, QTH, QSO, QRZ, QRM, and QSY.
- Topic: Radio Communication
- Best use: fast reference, learning, and clear communication.
- Updated: 2025-08-11
Q codes are compact three-letter signals that amateur radio operators use to ask questions and share common information quickly.
How to Use Q Codes
A Q code can be a question or a statement depending on context. QTH? asks for your location. My QTH is Boston means my location is Boston.
Ham Radio Q Codes
| Code | Meaning |
|---|---|
| QRL | Is this frequency in use? |
| QRM | Interference from other stations. |
| QRN | Static or atmospheric noise. |
| QRO | Increase power. |
| QRP | Decrease power or low-power operation. |
| QRS | Send more slowly. |
| QRT | Stop transmitting. |
| QRZ | Who is calling me? |
| QSB | Your signal is fading. |
| QSL | I acknowledge receipt. |
| QSO | A radio contact or conversation. |
| QSY | Change frequency. |
| QTH | My location is... |