Amateur Radio Q-Codes

International Q Code is an abbreviated way to exchange a great deal of information with a simple code. The Q Code consists of three-letter groups with each group having a specific meaning. Each group begins with the letter Q. Auxiliary letter groups or numbers are also used to help define the information that is need or passed with certain Q Code three-letter groups.

The International Q Code can be arranged in three types of code groups according to the second letter in the three-letter Q Code.

The Q Code comprises :
A. General Codes, second letter of which is R, S, T or U. (Some used by Hams).
B. Maritime Service Codes, second letter of which is O, P or Q.
C. Aeronautical Codes, second letter of which is A, B, C, D, E, F, G, H, I, J, K, L, M or N.

Some common Q-Codes used by Amateur Radio Operators are:

Signal Question Signal Answer, Advice or Order
QRG? Will you indicate my exact frequency in kilohertz? QRG Your frequency is ... kHz.
QRH? Does my frequency vary? QRH Your frequency varies.
QRI? How is the tone of my transmission? QRI The tone of your transmission is ...
1. Good.
2. Variable.
3. Bad.
QRJ? Are you receiving me badly? Are my signals weak? QRJ I cannot receive you. Your signals are too weak.
QRK? What is the legibility of my signals (1 to 5)? QRK The legibility of your signals is ... (1 to 5).
QRL? Are you busy? QRL I am busy (or busy with....). Please do not interfere.
QRM? Are you being interfered with? QRM I am being interfered with.
QRN? Are you troubled by electrical noise? QRN I am troubled by electrical noise.
QRO? Must I increase power? QRO Increase power.
QRP? Must I decrease power? QRP Decrease power.
QRQ? Must I send faster? QRQ Send faster ... (words per min.).
QRS? Must I send more slowly? QRS Transmit more slowly ... (w.p.m.).
QRT? Must I stop transmission? QRT Stop transmission.
QRU? Have you anything for me? QRU I have nothing for you.
QRV? Are you ready? QRV I am ready.
QRW? Must I advise ... that you are calling him on ... kHz? QRW Please advise ... that I am calling him on ... kHz.
QRX? When will you call again? QRX I will call you again at ... hours (on ... kHz).
QRZ? By whom am I being called? QRZ You are being called by ...
QSA? What is the strength of my signals (1 to 5)? QSA The strength of your signals is ... (1 to 5).
QSB? Does the strength of my signals vary? QSB The strength of your signals varies.
QSD? Is my keying correct? Are my signals distinct? QSD Your keying is incorrect; your signals are bad.
QSG? Must I transmit ... telegrams (or one telegram) at a time? QSG Transmit ... telegrams (or one telegram) at a time.
QSK? Shall I continue the transmission of all my traffic? QSK I can hear you between my signals. Continue: I shall interrupt you if necessary.
QSL? Can you acknowledge receipt? QSL I am acknowledging receipt.
QSM? Shall I repeat the last telegram I sent you? QSM Repeat the last telegram you sent me.
QSO? Can you communicate with ... directly (or through...)? QSO I can communicate with ... direct (or through...).
QSP? Will you relay to ...? QSP I will relay to ... free of charge.
QSV? Shall I send a series of VVV....? QSV Send a series of VVV.
QSX? Will you listen for ... (call sign) on ... kHz? QSX I am listening for ... on ... kHz.
QSY? Shall I change to ... kilohertz without changing the type of wave? QSY Change to ... kHz without changing type of wave.
QSZ? Shall I send each word or group twice? QSZ Send each word or group twice.
QTA? Shall I cancel nr ... as if it had not been sent? QTA Cancel nr ... as if it had not been sent.
QTB? Do you agree with my word count? QTB I do not agree with your word count; I shall repeat the first letter of each word and the first figure of each number.
QTC? How many telegrams have you to send? QTC I have ... telegrams for you or for ....
QTH? What is your position (location)? QTH My position (location) is ....
QTR? What is the exact time? QTR The exact time is ....