The "official" codes were assigned meanings by the International Telecommunications Union in 1959. The abridged definitions of the "official" codes are derived from a very detailed list compiled by using information extracted from Allied Communications Publication 131(B), Amendment 1.
Also included, are the "unofficial" meanings assigned by the American Radio Relay League (ARRL) to QST and to codes in the QNA to QNZ series, which are defined in the ARRL Handbook for Radio Amateurs and should only be used in amateur CW nets. These net codes should not be used in casual amateur CW conversations or in phone nets. When used by the Amateur Service, meanings assigned to codes in the QNA to QNZ series by other Services do not apply. Most, but not all, of the codes can be used either as a statement or a question, depending on the context of their use.
These Q-Codes were intended for CW use, where the question form would be denoted by following the code with a question mark (..--..). When using the ARRL definitions of codes in the QNA to QNZ series, no question mark is necessary, even though the meaning may be interrogatory. Radio amateurs, and some professional operators, also use these codes on telephony, where the context is more obvious. Also, in amateur radio use, Q-Codes are often used as an abbreviation for a longer phrase. For example, QTH is used to indicate the location of the station as in "My QTH is Storrington", whereas QTH actually means "What is your position in latitude and longitude (or according to some other recognised location system)" or "My position is .......".
QAB May I have clearance from ... to ... at ...(height) above ...(datum).
QAF Will you advise me when you are/were at/over ...(place)
QAG Arrange your flight in order to arrive over ...(place) at ...(time)
QAH What is you height above ...(datum)
QAI What is the essential aircraft (not communications) traffic
QAK Is there any risk of collision
QAL Are you going to land at ...(place) or Has aircraft landed at ...(place)
QAM What is the latest available meteorological observation for ...(place)
QAN What is the surface wind direction and speed at ...(place)
QAO What is the wind direction, in degrees TRUE, and the speed at ...(place)
QAP Shall I listen for you on ... kHz/MHz
QAQ Am I near a prohibited area
QAR May I stop listening on the watch frequency for ... minutes
QAU I am about to jettison fuel
QAV Are you able to home on your DF equipment
QAW I am about to carry out overshoot procedure
QAY Will you advise me when you pass ...(place) bearing 090 degrees
QAZ Are you experiencing communication difficulties due to a storm
QBA What is the horizontal visibility at ...(place)
QBB What is the amount, type and height of the cloud base at ...(place)
QBC Report meteorological conditions at...(position) at ...(time)
QBD How much fuel have you remaining
QBE I am about to wind in my aerial
QBF Are you flying in cloud
QBG Are you flying above cloud
QBH Are you flying below cloud
QBI Is flight under IFR compulsory at ...(place)
QBJ What is the amount, type and height of the cloud top at ...(place)
QBK Are you flying with no cloud in your vicinity
QBM Has ...(callsign) sent any message for me
QBN Are you flying between two layers of cloud
QBO What is the nearest aerodrome where flight under VFR is permissible
QBP Are you flying in and out of cloud
QBS Ascend or descend to ...(figures and units) height above ...(datum)
QBT How far along the runway can the observer see the runway lights
QBV Have you reached the ...(figures and units) height above ...(datum)
QBX Have you left the ...(figures and units) height above ...(datum)
QBZ Report your flying conditions in relation to clouds
QCA May I change from ... to ...(figures and units) height above ...(datum)
QCB Delay is being caused by ...(reason)
QCE When may I expect approach clearance
QCF Delay indefinite. Expect approach clearance not later than ... hours
QCH May I taxi to ...(place)
QCI Make a 360 degree turn immediately, turning to the ...(right/left)
QCS My reception on ... frequency has broken down
QCX What is your full callsign
QCY I am working on trailing aerial
QDB Have you sent message ... to ...(callsign)
QDF What is your D-value at ...(position)
QDL Do you intend to ask me for a series of bearings
QDM Indicate the MAGNETIC heading for me to steer towards you, with no wind
QDP Will you accept control or responsibility of ... now, or at ... hours
QDR What is my MAGNETIC bearing from you, or from ...(callsign)
QDT Are you flying in visual meteorological conditions (VMC)
QDU Cancel my IFR flight plan
QDV Are you flying in a horizontal visibility of less than ...(figures and units)
QEA May I cross the runway ahead of me
QEB May I turn at the intersection
QEC May I make a 180 degree turn and return down the runway
QED Shall I follow the pilot vehicle
QEF Have I/you reached my/your parking area
QEG May I leave the parking area
QEH May I move to the holding position for runway number ...
QEJ May I assume position for take-off
QEK Are you ready for immediate take-off
QEL May I take-off and make a ...(left/right) hand turn after take-off
QEM What is the condition of the landing surface at ...(place)
QEN Shall I hold my position
QEO Shall I clear the runway or landing area
QES Is a right hand circuit in force at ...(place)
QFA What is the meteorological forcast for ...(flight, route etc.)
QFB The approach/runway/approach and runway lights are out of order
QFC What is the amount, type and height of the cloud base above ...(datum)
QFD Is the ... visual beacon at ...(place) in operation
QFE What is the atmospheric pressure, at aerodrome elevation, at ...(place)
QFF What is the atmospheric pressure, converted to mean sea level, at ...(place)
QFG Am I overhead
QFH May I descend below the clouds
QFI Are the aerodrome lights lit or Please light the aerodrome lights
QFL Will you send up pyrotechnical lights
QFM What height above ...(datum) should I maintain/are you maintaining
QFO May I land immediately
QFP Will you give me the latest information concerning ... at ...(place)
QFQ Are the approach and runway lights lit
QFR Does my landing gear appear damaged
QFS Is the radio facility at ...(place) in operation
QFT Between what heights above ...(datum) has ice formation been observed
QFU What is the MAGNETIC direction or number of the runway to be used
QFV Are the floodlights switched on or Please switch on the floodlights
QFW What is the length of the runway in ...(figures and units)
QFX I am working on a fixed aerial or Work on a fixed aerial
QFY Please report the present meteorological landing conditions at ...(place)
QFZ What is the aerodrome meteorological forecast for ...(place)
QGC There are obstructions to the ...(left/right) of the runway
QGD Are there any obstructions on my track that equal or exceed my altitude
QGE What is my distance to your station or to ...(place)
QGH May I land using ...(procedure/facility)
QGK What track should I make good or What track are you making good
QGL May I enter the ...(control area/zone) at ...(place)
QGM Leave the ...(control area/zone)
QGN May I be cleared to land at ...(place)
QGO Landing is prohibited at ...(place)
QGP What is my number for landing
QGQ May I hold at ...(place)
QGT Fly for ... minutes on a heading that maintains a reciprocle track
QGU Fly for ... minutes on a MAGNETIC heading of ... degrees
QGV Do you see me or Can you see the aerodrome or Can you see ...(aircraft)
QGW Does my landing gear appear to be down and in place
QGZ Hold on ... direction of ... facility
QHE Will you inform me when you are on ... leg of approach
QHG May I enter traffic circuit at ...(figures and units) above ...(datum)
QHH Are you making an emergency landing
QHI Are you (or is ...) ...(waterbourne/on land)
QHQ May I make a ... approach at ...(place) or Are you making a ... approach
QHZ Shall I circle the aerodrome (or go around)
QIC May I establish communication with ...(callsign) on ... kHZ/MHz
QIF What frequency is ...(callsign) using
QJA Is my ...(tape/mark and space) reversed
QJB Will you use ...(radio/cable/telegraph/teletypwriter/telphone/receiver/transmitter/reperforator)
QJC Will you check your ...(transmitter-distributor/auto-head/perforator/printer/printer motor/keyboard/antenna system)
QJD Am I transmitting in ...(letters/figures)
QJE Is my frequency shift ...(too wide/too narrow/correct)
QJF My signal as checked by monitor ...(locally/as radiated) is satisfactory
QJG Shall I revert to automatic relay
QJH Shall I run ...(my test tape/a test sentence)
QJI Will you transmit a continuous ...(mark/space)
QJK Are you receiving a ...(continuous mark/continuous space/mark bias/space bias)
QKA I have effected rescue and am proceeding to ...(base)
QKC The sea conditions at ...(place) permit ...(alighting but not take-off/extremely hazardous alighting)
QKF May I be relieved at ... hours
QKG Will relief take place when ...(ident) establishes ...(visual/communications) contact with survivors
QKH Report details of the parallel sweep to be conducted
QKM Has the location of the survival craft been marked
QKN Aircraft plotted (believed to be you) in position ... at ... hours
QKO What other units are taking part in the operation
QKP What pattern of search is being followed
QKW What has the rescue vessel or rescue aircraft recovered
QKY Are you in the search area designated as ...(lat/long or designator)
QKZ What is the estimated drift of the survival craft
QLB Will you monitor ...(callsign) and report range, quality, etc.
QLH Will you use simultaneous keying on ... frequency and ... frequency
QLV Is the ... radio facility still required
QMH Shift to transmit and receive on ... kHz/MHz
QMI Report the vertical distribution of cloud at ...(position)
QMU What is the surface temperature and dew point at ...(position)
QMW At what heights above ...(datum) are the zero celsius isotherms
QMX What is the air temperature at ...(position) at ...(units and figures) height above ...(datum)
QMZ Have you any amendments to the flight forecast in respect of sections of the route yet to be traversed
QNA Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Answer in prearranged order". (This code should only be used by the Net Control Station).
QNB Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Act as relay station between ..... and .....". (This code should only be used by the Net Control Station).
QNC Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "All net stations copy. I have a message for all net stations".
QND Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Net is directed (controlled by net control station)". (This code should only be used by the Net Control Station).
QNE What indication will my altimeter give on landing at ...(place). Also adopted by the ARRL, for use only in CW nets, as meaning
"Entire net stand by". (This code should only be used by the Net Control Station).
QNF Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Net is free (not controlled)".
QNG Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Take over as net contol station".
QNH What should I set on the sub-scale of my altimeter so that the instrument would indicate my elevation if I were on the ground at your station. Also adopted by the ARRL, for use only in CW nets, as meaning "Your net frequency is high".
QNI Between what heights above ...(datum) has turbulence been observed at ...(position). Also adopted by the ARRL, for use only in CW nets, as meaning "Net stations report in" OR "I am reporting into the net". (Follow with a list of traffic or QRU).
QNJ Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Can you copy me".
QNK Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Transmit messages for ..... to .....". (This code should only be used by the Net Control Station).
QNL Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Your net frequency is low".
QNM Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "You are QRMing the net. Stand by". (This code should only be used by the Net Control Station).
QNN Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Net control station is ....." OR "What station has net control".
QNO I am not equipped to give the information/provide the facility requested Also adopted by the ARRL, for use only in CW nets, as meaning "Station is leaving the net".
QNP Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Unable to copy you" OR "Unable to copy .....".
QNQ Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Move frequency to ..... and wait for ..... to finish handling traffic. Then send him traffic for .....".
QNR I am approaching my point of no return. Also adopted by the ARRL, for use only in CW nets, as meaning "Answer ..... and receive traffic". (This code should only be used by the Net Control Station).
QNS Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Following stations are in the net" (Follow with list), when used by Net Control Station OR "Request list of stations in the net", when used by other net members.
QNT What is the maximum gust speed of the wind at ...(place). Also adopted by the ARRL, for use only in CW nets, as meaning "I request permission to leave the net for ..... minutes".
QNU Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "The net has traffic for you. Stand by". This code should only be used by the Net Control Station.
QNV Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Establish contact with ..... on the frequency. If successful, move to ..... and send him traffic for .....". (This code should only be sed
by the Net Control Station).
QNW Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "How do I route messages for .....".
QNX Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "You are excused from the net", when used by Net Control Station OR "Request to be excused from the net", when used by other net members.
QNY What is the present weather, and intensity thereof, at ...(place). Also adopted by the ARRL, for use only in CW nets, as meaning "Shift to another frequency, or to .....kHz, to clear traffic with .....". (This code should only be used by the Net Control Station).
QNZ Unassigned, but adopted by the ARRL, for use only in CW nets, as meaning "Zero beat your signal with mine".
QOA to QOZ The series QOA to QQZ, inclusive, have been reserved for
QPA to QPZ the Maritime Services but no meanings have been assigned
QQA to QQZ to date.
QRA What is the name of your station
QRB How far, approximately, are you from my station
QRC What authority/administration settles the accounts of your station
QRD Where are you bound and where are you from
QRE What is your estimated time of arrival at ...(place)
QRF Are you returning to ...(place)
QRG Will you tell me my exact frequency or that of ...(callsign)
QRH Does my frequency vary
QRI How is the tone of my transmission
QRJ How many radio telephone calls have you to book.
(See note at the end of this list for a possible alternative meaning).
QRK What is the intelligibility of my signals or those of ...(callsign)
QRL Are you busy
QRM Are you being interferred with
QRN Are you troubled by static
QRO Shall I increase transmitter power
QRP Shall I decrease transmitter power
QRQ Shall I send faster
QRR Are you ready for automatic operation
QRS Shall I send more slowly
QRT Shall I stop sending
QRU Have you anything for me
QRV Are you ready
QRW Shall I inform ...(callsign) that you are calling him on ... kHz/MHz
QRX When will you call me again on ... kHz/MHz. Must I wait
QRY What is my turn
QRZ Who is calling me
QSA What is the strength of my signals or those of ...(callsign)
QSB Are my signals fading
QSC Are you a cargo vessel
QSD Is my keying defective
QSE What is the estimated drift of the survival craft
QSF Have you effected rescue
QSG Shall I send ...(number) telegrams at a time
QSH Are you able to home on your D/F equipment
QSI Will you inform ...(callsign) that I have been unable to break in
QSJ What is the charge to be collected to ...(callsign), including your charge
QSK Can you hear me between your signals and, if so, can I break in
QSL Can you acknowledge receipt
QSM Shall I repeat the last telegram which I sent to you
QSN Did you hear me or ...(callsign) on ... kHz/MHz
QSO Can you communicate with ...(callsign) direct or by relay
QSP Will you relay to ...(callsign), free of charge
QSQ Have you a doctor on board or Is ...(named person) on board
QSR Shall I repeat the call on the calling frequency
QSS What working frequency will you use
QST General call to all stations
QSU Shall I send or reply on this frequency or on ... kHz/MHz
QSV Shall I send a series of V's on this frequency or on ... kHz/MHz
QSW Will you send on this frequency or on ... kHz/MHz
QSX Will you listen to ...(callsign) on ... kHz/MHz
QSY Shall I change to transmission on another frequency
QSZ Shall I send each word or group more than once
QTA Shall I cancel telegram number ...
QTB Do you agree with my counting of words
QTC How many telegrams have you to send
QTD What has the rescue vessel or rescue aircraft recovered
QTE What is my TRUE bearing from you or from ...(callsign)
QTF Will you give me the position of my station according to the bearings
taken by the D/F stations which you control
QTG Will you send two dashes of ten seconds each followed by your callsign
repeated ... times on ... kHz/MHz
QTH What is your position in latitude and longitude (or according to any
QTI What is your TRUE track
QTJ What is your speed
QTK What is the speed of your aircraft in relation to the earth's surface
QTL What is you TRUE heading
QTM What is your MAGNETIC heading
QTN At what time did you depart from ...(place)
QTO Are you airborne or Have you left dock/port
QTP Are you going to alight/land or Are you going to enter dock/port
QTQ Can you communicate with my station by means of the international code
QTR What is the correct time
QTS Will you send your callsign for tuning purposes or frequency measurement
QTT The identification signal which follows is superimposed on another
QTU What are the hours during which your station is open
QTV Shall I stand guard for you on the frequency of ...kHz/MHz
QTW What is the condition of survivors
QTX Will you keep your station open for further communication with me
QTY Are you proceeding to the position of the incident and, if so, when do
you expect to arrive
QTZ Are you continuing the search
QUA Have you news of ...(callsign)
QUB Can you give me, in the following order, information concerning: the direction in degrees TRUE and the speed of the surface wind, present weather, visibility and amount, type and height of cloud base above the surface elevation at ...(place)
QUC What is the number or other identification of the last message you received from me or from ...(callsign)
QUD Have you received the urgency signal sent by ...(callsign)
QUE Can you use telephony in ...(language), with interpreter if necessary, if so, on what frequencies
QUF Have you received the distress signal sent by ...(callsign)
QUG Will you be forced to alight or land
QUH Will you give me the present barometric pressure at sea level
QUI Are your navigation lights working
QUJ Will you indicate the TRUE track to reach you
QUK Can you tell me the condition of the sea observed at ...(place)
QUL Can you tell me the swell observed at ...(place)
QUM May I resume normal working or Has the distress traffic ended
QUN Will vessels in my immediate vicinity please indicate their position,
TRUE course and speed
QUO Shall I search for ...(aircraft/ship/survival craft) in the vicinity of...(position)
QUP Will you indicate your position by ...(searchlight/black smoke trail/ pyrotechnic lights)
QUQ Shall I train my searchlight nearly vertical on a cloud, occulting if possible and, if your aircraft is seen or heard, deflect the beam up wind and on the water or land to facilitate your landing
QUR Have survivors ...(received survival equipment/been picked up by a rescue vessel/been reached by ground rescue party)
QUS Have you sighted survivors or wreckage. If so in what position
QUT Is position of incident marked
QUU Shall I home ship or aircraft to my position
QUV What is my MAGNETIC bearing from you or from ...(callsign)
QUW Are you in the search area designated as ...(lat/long or designator)
QUX Will you indicate the MAGNETIC course for me to steer towards you or ...(callsign) with no wind
QUY Is position of survival craft marked
QVA to QVZ No "official" meanings for the series QVA to QZZ, inclusive, have
QWA to QWZ been allocated to date, but see note below.
QXA to QXZ
QYA to QYZ
QZA to QZZ
The ARRL has assigned "unofficial" meanings to QST and to all codes in the QNA to
QNZ series. These are included in the above list. Robert Harris, in his book
"Enigma", states that QRJ, QWP, QXA and QXH have the meanings stated below, but the
authenticity of these definitions is open to debate.
QRJ Your frequency is too high
QWP Observe Regulations
QXAn My message consists of n cipher groups
QXH Broadcast your traffic