Apparatus

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sensors Mode-S transponder

7C4923

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-OQD · AIRBUS A-380-800 · operated by QANTAS AIRWAYS LIMITED

Hex
7C4923
Octal
37044443
Decimal
8,145,187
Country
AU
Tail
VH-OQD
Type
A388
No current signal · last broadcast 5h ago
Flights observed
76
Distinct callsigns
10
Country
AU
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 7C4923.

Country allocation

The ICAO 24-bit address 7C4923 falls within the block assigned to Australia (AU) by ICAO Annex 10, Volume III. Every aircraft registered in Australia receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 10 distinct

Callsign Airline Flights Last seen
QFA2 Qantas 19 2026-05-29
QFA1 Qantas 19 2026-05-27
QFA8 Qantas 8 2026-05-20
QFA7 Qantas 6 2026-05-19
QFA81 Qantas 4 2026-04-24
QFA64 Qantas 4 2026-05-21
QFA63 Qantas 4 2026-05-29
QFA12 Qantas 4 2026-05-23
QFA11 Qantas 4 2026-05-22
QFA82 Qantas 3 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 QFA63 SYD → JNB May 29, 23:55 UTCMay 30, 01:00 UTC1h 5m
2026-05-29 QFA2 LHR → SIN May 29, 12:10 UTCMay 29, 19:05 UTC6h 55m
2026-05-28 QFA2 LHR → SIN May 28, 20:20 UTCMay 29, 08:25 UTC12h 5m
2026-05-27 QFA1 SYD → SIN May 27, 16:20 UTCMay 28, 06:05 UTC13h 45m
2026-05-27 QFA1 SYD → SIN May 27, 05:24 UTCMay 27, 05:59 UTC35m
2026-05-26 QFA2 LHR → SIN May 26, 18:24 UTCMay 26, 19:20 UTC55m
2026-05-25 QFA2 LHR → SIN May 25, 20:50 UTCMay 26, 09:09 UTC12h 20m
2026-05-24 QFA1 SYD → SIN May 24, 16:00 UTCMay 25, 05:40 UTC13h 40m
2026-05-24 QFA1 SYD → SIN May 24, 05:15 UTCMay 24, 05:50 UTC35m
2026-05-23 QFA12 LAX → SYD May 23, 07:10 UTCMay 23, 21:25 UTC14h 15m
2026-05-22 QFA11 SYD → LAX May 22, 09:15 UTCMay 22, 21:55 UTC12h 40m
2026-05-21 QFA64 JNB → SYD May 21, 19:10 UTCMay 22, 06:40 UTC11h 30m
2026-05-21 QFA63 SYD → JNB May 21, 00:55 UTCMay 21, 14:35 UTC13h 40m
2026-05-20 QFA8 DFW → SYD May 20, 05:10 UTCMay 20, 21:50 UTC16h 40m
2026-05-19 QFA7 SYD → DFW May 19, 02:30 UTCMay 19, 17:15 UTC14h 45m
2026-05-18 QFA12 LAX → SYD May 18, 07:05 UTCMay 18, 21:40 UTC14h 34m
2026-05-17 QFA11 SYD → LAX May 17, 08:15 UTCMay 17, 21:10 UTC12h 55m
2026-05-16 QFA64 JNB → SYD May 16, 17:01 UTCMay 17, 04:25 UTC11h 25m
2026-05-16 QFA63 SYD → JNB May 16, 00:25 UTCMay 16, 13:35 UTC13h 11m
2026-05-15 QFA2 LHR → SIN May 15, 19:05 UTCMay 15, 19:40 UTC35m
2026-05-14 QFA2 LHR → SIN May 14, 21:55 UTCMay 15, 10:20 UTC12h 25m
2026-05-13 QFA1 SYD → SIN May 13, 15:45 UTCMay 14, 05:25 UTC13h 40m
2026-05-13 QFA1 SYD → SIN May 13, 05:15 UTCMay 13, 05:50 UTC35m
2026-05-12 QFA2 LHR → SIN May 12, 18:05 UTCMay 12, 19:05 UTC1h 0m
2026-05-11 QFA2 LHR → SIN May 11, 20:20 UTCMay 12, 08:55 UTC12h 35m
2026-05-10 QFA1 SYD → SIN May 10, 16:25 UTCMay 11, 05:55 UTC13h 30m
2026-05-10 QFA1 SYD → SIN May 10, 06:10 UTCMay 10, 06:45 UTC35m
2026-05-09 QFA8 DFW → SYD May 9, 04:25 UTCMay 9, 21:09 UTC16h 45m
2026-05-08 QFA7 SYD → DFW May 8, 03:35 UTCMay 8, 17:55 UTC14h 20m
2026-05-07 QFA8 DFW → SYD May 7, 04:20 UTCMay 7, 21:15 UTC16h 55m
2026-05-06 QFA7 SYD → DFW May 6, 02:40 UTCMay 6, 17:00 UTC14h 20m
2026-05-04 QFA12 LAX → SYD May 4, 09:30 UTCMay 5, 00:25 UTC14h 56m
2026-05-03 QFA11 SYD → LAX May 3, 08:05 UTCMay 3, 20:40 UTC12h 35m
2026-05-03 QFA64 JNB → SYD May 3, 03:35 UTCMay 3, 05:15 UTC1h 40m
2026-05-02 QFA64 JNB → SYD May 2, 17:50 UTCMay 2, 18:10 UTC20m
2026-05-02 QFA63 SYD → JNB May 2, 01:20 UTCMay 2, 14:50 UTC13h 31m
2026-05-01 QFA12 LAX → SYD May 1, 08:00 UTCMay 1, 22:20 UTC14h 20m
2026-04-29 QFA11 SYD → LAX Apr 29, 08:10 UTCApr 29, 21:05 UTC12h 56m
2026-04-28 QFA8 DFW → SYD Apr 28, 04:35 UTCApr 28, 21:15 UTC16h 40m
2026-04-27 QFA7 SYD → DFW Apr 27, 02:50 UTCApr 27, 17:05 UTC14h 15m
2026-04-26 QFA8 DFW → SYD Apr 26, 06:45 UTCApr 26, 23:35 UTC16h 50m
2026-04-25 QFA7 SYD → DFW Apr 25, 02:40 UTCApr 25, 17:20 UTC14h 40m
2026-04-24 QFA82 SIN → SYD Apr 24, 15:05 UTCApr 24, 20:55 UTC5h 50m
2026-04-24 QFA81 SYD → SIN Apr 24, 01:25 UTCApr 24, 02:00 UTC35m
2026-04-23 QFA2 LHR → SIN Apr 23, 13:10 UTCApr 23, 19:05 UTC5h 54m
2026-04-23 - - Apr 23, 12:01 UTCApr 23, 12:10 UTC10m
2026-04-22 QFA2 LHR → SIN Apr 22, 20:20 UTCApr 23, 09:25 UTC13h 5m
2026-04-21 QFA1 SYD → SIN Apr 21, 16:05 UTCApr 22, 05:25 UTC13h 20m
2026-04-21 QFA1 SYD → SIN Apr 21, 05:05 UTCApr 21, 05:55 UTC50m
2026-04-20 QFA2 LHR → SIN Apr 20, 18:20 UTCApr 20, 19:05 UTC45m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the VH-OQD page for operator, model, and routing details .

Mode-S 7C4923 frequently asked

What is Mode-S code 7C4923?
7C4923 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OQD.
Where is Mode-S 7C4923 registered?
Mode-S code 7C4923 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4923 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4923, octal 37044443, decimal 8,145,187.
What flights does 7C4923 operate?
Mode-S 7C4923 has broadcast 10 distinct callsigns, including QFA2, QFA1, QFA8, QFA7, QFA81.