QRA What is the name (call) of your station?
The name (call) of my station is _____
QRB How far are you from my station?
I am ____ km from your station
QRG What is my exact frequency?
Your frequency is ____ kHz
QRH Does my frequency vary?
QRH = Your frequency varies, QRH NIL = Your frequency don’t vary
QRJ Are you receiving me badly?
I can’t receive you, your signal are too weak
QRL Are you busy? Hams use this as: Are this frequency busy?
I’m busy, please don’t interfere.
QRM Is my transmission being interfered with ____?
Your transmission is being interfered (1 = NIL, 2 = Slightly, 3 = Moderately, 4 = Severe and 5 = Extemely)
QRN Are you troubled by static?
I’m troubled by static (1 = NIL, 2 = Slightly, 3 = Moderately, 4 = Severe and 5 = Extemely)
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 stop sending?
Stop sending
QRU Have you anything for me?
I have nothing for you
QRV Are you ready?
I’m ready
QRX When will you call me again?
I will call you again at ____ hours
QRZ Who is calling me?
You are been called by ____
QSB Are my signals fading?
Your signals are fading
QSD Is my keying defective?
Your keying are defective
QSK Can you hear me between your signals and if so can I break in on your transmission?
I can hear you between my signals, break in on my transmission
QSL Can you acknowledge receipt?
I’m acknowledging receipt
QSO Can you communicate with ____ direct or by relay?
I can communicate with ____ direct (or by relay through ____)
QSP Will you relay to ____?
I will relay to ____
QSV Shall I send a series of V’s on this frequency?
Send a series of V’s on this frequency
QSY Shall I change to another frequency?
Change to another frequency
QTH What is your location?
My location is ____
QTR What is the correct time?
The time is ____ (a-z)

When followed by a question mark, the code is a question

Unofficial code
QLF? Are you keying with your left foot? (bad keying)
QBL You are blacklisted! PSE QRT/QSY