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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 Jul 26, 21:25 UTC
Flights observed
156
Distinct callsigns
13
Country
AU
Last broadcast
Jul 26, 21:25 UTC

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 13 distinct

Callsign Airline Flights Last seen
QFA1 Qantas 35 2026-07-21
QFA2 Qantas 33 2026-07-23
QFA8 Qantas 14 2026-07-17
QFA12 - 13 2026-07-13
QFA7 - 12 2026-07-16
QFA64 Qantas 12 2026-07-25
QFA11 Qantas 11 2026-07-26
QFA63 Qantas 9 2026-07-25
QFA81 Qantas 7 2026-07-24
QFA82 Qantas 5 2026-07-24
QFA94 - 2 2026-06-14
QFA93 - 1 2026-06-15
MAINT - 1 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA11 SYD → LAX Jul 26, 08:15 UTCJul 26, 21:25 UTC13h 10m
2026-07-25 QFA64 JNB → SYD Jul 25, 17:00 UTCJul 26, 04:20 UTC11h 20m
2026-07-25 QFA63 SYD → JNB Jul 25, 00:05 UTCJul 25, 14:05 UTC14h 0m
2026-07-24 QFA82 SIN → SYD Jul 24, 14:45 UTCJul 24, 20:15 UTC5h 30m
2026-07-24 QFA81 SYD → SIN Jul 24, 08:55 UTCJul 24, 09:05 UTC10m
2026-07-24 QFA81 SYD → SIN Jul 24, 01:00 UTCJul 24, 05:10 UTC4h 10m
2026-07-23 QFA2 LHR → SIN Jul 23, 12:10 UTCJul 23, 19:05 UTC6h 55m
2026-07-22 QFA2 LHR → SIN Jul 22, 20:25 UTCJul 23, 08:35 UTC12h 10m
2026-07-21 QFA1 SYD → SIN Jul 21, 16:50 UTCJul 22, 05:25 UTC12h 35m
2026-07-21 QFA1 SYD → SIN Jul 21, 05:15 UTCJul 21, 05:45 UTC30m
2026-07-20 QFA2 LHR → SIN Jul 20, 12:35 UTCJul 20, 19:05 UTC6h 30m
2026-07-19 QFA2 LHR → SIN Jul 19, 20:35 UTCJul 20, 08:55 UTC12h 20m
2026-07-18 QFA1 SYD → SIN Jul 18, 16:00 UTCJul 19, 05:15 UTC13h 15m
2026-07-18 QFA1 SYD → SIN Jul 18, 12:35 UTCJul 18, 12:55 UTC20m
2026-07-18 QFA1 SYD → SIN Jul 18, 05:05 UTCJul 18, 06:00 UTC55m
2026-07-17 QFA8 DFW → SYD Jul 17, 05:04 UTCJul 17, 20:44 UTC15h 40m
2026-07-16 QFA7 SYD → DFW Jul 16, 02:55 UTCJul 16, 18:00 UTC15h 5m
2026-07-15 QFA8 DFW → SYD Jul 15, 04:45 UTCJul 15, 20:40 UTC15h 55m
2026-07-14 QFA7 SYD → DFW Jul 14, 02:50 UTCJul 14, 18:05 UTC15h 15m
2026-07-13 QFA12 - Jul 13, 07:20 UTCJul 13, 21:20 UTC14h 0m
2026-07-12 QFA11 SYD → LAX Jul 12, 08:15 UTCJul 12, 21:20 UTC13h 5m
2026-07-11 QFA64 - Jul 11, 17:35 UTCJul 12, 04:35 UTC11h 0m
2026-07-11 QFA63 - Jul 11, 00:10 UTCJul 11, 14:45 UTC14h 35m
2026-07-10 QFA2 - Jul 10, 18:25 UTCJul 10, 19:05 UTC40m
2026-07-10 QFA2 - Jul 10, 12:05 UTCJul 10, 12:15 UTC10m
2026-07-09 QFA2 - Jul 9, 20:15 UTCJul 10, 08:35 UTC12h 20m
2026-07-08 QFA1 - Jul 8, 16:40 UTCJul 9, 05:40 UTC13h 0m
2026-07-08 QFA1 - Jul 8, 13:45 UTCJul 8, 13:55 UTC10m
2026-07-08 QFA1 - Jul 8, 05:50 UTCJul 8, 07:40 UTC1h 50m
2026-07-07 QFA8 DFW → SYD Jul 7, 05:10 UTCJul 7, 21:30 UTC16h 20m
2026-07-06 QFA7 SYD → DFW Jul 6, 03:05 UTCJul 6, 17:50 UTC14h 45m
2026-07-05 QFA2 - Jul 5, 13:10 UTCJul 5, 20:05 UTC6h 55m
2026-07-04 QFA2 - Jul 4, 20:25 UTCJul 5, 09:05 UTC12h 40m
2026-07-03 QFA1 - Jul 3, 18:40 UTCJul 4, 08:15 UTC13h 35m
2026-07-03 QFA1 - Jul 3, 07:50 UTCJul 3, 11:55 UTC4h 5m
2026-07-03 QFA64 - Jul 3, 02:40 UTCJul 3, 04:10 UTC1h 30m
2026-07-02 QFA64 - Jul 2, 17:15 UTCJul 2, 17:35 UTC20m
2026-07-02 QFA63 SYD → JNB Jul 2, 00:00 UTCJul 2, 14:45 UTC14h 45m
2026-07-01 QFA12 - Jul 1, 19:30 UTCJul 1, 21:05 UTC1h 35m
2026-07-01 QFA12 - Jul 1, 07:00 UTCJul 1, 07:25 UTC25m
2026-06-30 QFA11 - Jun 30, 08:35 UTCJun 30, 21:35 UTC13h 0m
2026-06-30 QFA64 - Jun 30, 02:40 UTCJun 30, 04:20 UTC1h 40m
2026-06-29 QFA64 - Jun 29, 17:05 UTCJun 29, 17:24 UTC20m
2026-06-29 QFA63 SYD → JNB Jun 29, 00:44 UTCJun 29, 14:14 UTC13h 30m
2026-06-28 QFA2 - Jun 28, 18:19 UTCJun 28, 19:04 UTC45m
2026-06-27 QFA2 - Jun 27, 20:44 UTCJun 28, 09:25 UTC12h 40m
2026-06-26 QFA1 - Jun 26, 15:54 UTCJun 27, 05:15 UTC13h 20m
2026-06-26 QFA1 - Jun 26, 13:04 UTCJun 26, 13:15 UTC10m
2026-06-26 QFA1 - Jun 26, 05:39 UTCJun 26, 06:15 UTC35m
2026-06-25 QFA2 - Jun 25, 18:24 UTCJun 25, 19:05 UTC40m

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 Jul 26, 21:25 UTC.
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 13 distinct callsigns, including QFA1, QFA2, QFA8, QFA12, QFA7.