Apparatus

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sensors Mode-S transponder

7C531C

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-QPA · AIRBUS A-330-300 · operated by QANTAS AIRWAYS LIMITED

Hex
7C531C
Octal
37051434
Decimal
8,147,740
Country
AU
Tail
VH-QPA
Type
A333
No current signal · last broadcast Jul 26, 21:50 UTC
Flights observed
219
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 21:50 UTC

Last known position

Most recent position reported by Mode-S 7C531C.

Country allocation

The ICAO 24-bit address 7C531C 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 20 distinct

Callsign Airline Flights Last seen
QFA59 - 20 2026-06-22
QFA60 Qantas 18 2026-06-22
QFA127 - 17 2026-07-08
QFA30 - 16 2026-07-17
QFA24 Qantas 16 2026-07-06
QFA23 - 16 2026-07-06
QFA29 Qantas 15 2026-07-17
QFA128 Qantas 14 2026-07-03
QFA80 Qantas 10 2026-07-26
QFA79 Qantas 10 2026-07-25
QFA61 Qantas 10 2026-07-25
QFA62 Qantas 9 2026-07-24
QFA26 - 7 2026-06-25
QFA25 Qantas 7 2026-06-25
QFA20 Qantas 7 2026-06-28
QFA19 - 7 2026-06-28
QFA51 - 4 2026-07-12
QFA044 - 3 2026-06-30
QFA36 - 2 2026-07-02
QFA98 - 1 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA80 NRT → MEL Jul 26, 12:15 UTCJul 26, 21:45 UTC9h 30m
2026-07-25 QFA79 MEL → HND Jul 25, 23:55 UTCJul 26, 09:55 UTC10h 1m
2026-07-25 QFA80 NRT → MEL Jul 25, 11:55 UTCJul 25, 21:35 UTC9h 40m
2026-07-25 QFA61 BNE → HND Jul 25, 01:20 UTCJul 25, 09:55 UTC8h 35m
2026-07-24 QFA62 NRT → BNE Jul 24, 13:20 UTCJul 24, 21:45 UTC8h 25m
2026-07-24 QFA79 MEL → HND Jul 24, 01:35 UTCJul 24, 11:30 UTC9h 55m
2026-07-23 QFA80 NRT → MEL Jul 23, 13:00 UTCJul 23, 22:35 UTC9h 35m
2026-07-23 QFA61 BNE → HND Jul 23, 01:35 UTCJul 23, 10:15 UTC8h 40m
2026-07-22 QFA62 NRT → BNE Jul 22, 13:25 UTCJul 22, 23:00 UTC9h 35m
2026-07-22 QFA61 BNE → HND Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 QFA61 BNE → HND Jul 22, 02:40 UTCJul 22, 03:50 UTC1h 10m
2026-07-20 QFA62D NRT → BNE Jul 20, 11:10 UTCJul 20, 19:35 UTC8h 25m
2026-07-19 QFA79 MEL → HND Jul 19, 03:30 UTCJul 19, 13:15 UTC9h 45m
2026-07-18 QFA80 BNE → MEL Jul 18, 23:20 UTCJul 19, 01:20 UTC2h 0m
2026-07-18 QFA80 NRT → BNE Jul 18, 11:55 UTCJul 18, 20:35 UTC8h 40m
2026-07-18 QFA79 MEL → HND Jul 18, 00:00 UTCJul 18, 09:45 UTC9h 46m
2026-07-17 QFA30 HKG → MEL Jul 17, 12:40 UTCJul 17, 21:20 UTC8h 40m
2026-07-17 QFA29 MEL → LHR Jul 17, 09:04 UTCJul 17, 09:35 UTC30m
2026-07-17 QFA29 MEL → LHR Jul 17, 00:55 UTCJul 17, 08:10 UTC7h 15m
2026-07-16 QFA80 NRT → MEL Jul 16, 11:50 UTCJul 16, 21:30 UTC9h 40m
2026-07-16 QFA61 BNE → NRT Jul 16, 00:50 UTCJul 16, 09:45 UTC8h 55m
2026-07-15 QFA62 NRT → BNE Jul 15, 13:05 UTCJul 15, 21:35 UTC8h 30m
2026-07-15 QFA79 MEL → NRT Jul 15, 00:15 UTCJul 15, 09:50 UTC9h 35m
2026-07-14 QFA80 NRT → MEL Jul 14, 12:45 UTCJul 14, 22:30 UTC9h 45m
2026-07-14 QFA61 BNE → NRT Jul 14, 01:05 UTCJul 14, 10:05 UTC9h 0m
2026-07-13 QFA62 NRT → BNE Jul 13, 12:50 UTCJul 13, 21:05 UTC8h 15m
2026-07-13 QFA61 - Jul 13, 00:45 UTCJul 13, 09:35 UTC8h 50m
2026-07-12 QFA52 - Jul 12, 13:01 UTCJul 12, 19:45 UTC6h 45m
2026-07-12 QFA51 - Jul 12, 09:45 UTCJul 12, 10:10 UTC25m
2026-07-12 QFA51 - Jul 12, 02:05 UTCJul 12, 03:35 UTC1h 30m
2026-07-09 QFA62 NRT → BNE Jul 9, 13:00 UTCJul 9, 21:15 UTC8h 15m
2026-07-09 QFA79 MEL → NRT Jul 9, 00:10 UTCJul 9, 10:15 UTC10h 5m
2026-07-08 QFA30 - Jul 8, 14:25 UTCJul 8, 21:25 UTC7h 0m
2026-07-08 QFA30 HKG → MEL Jul 8, 13:15 UTCJul 8, 13:30 UTC15m
2026-07-08 QFA127 - Jul 8, 10:55 UTCJul 8, 11:05 UTC10m
2026-07-08 QFA127 - Jul 8, 09:20 UTCJul 8, 09:55 UTC35m
2026-07-08 QFA127 - Jul 8, 01:50 UTCJul 8, 02:45 UTC55m
2026-07-06 QFA24 BKK → SYD Jul 6, 12:00 UTCJul 6, 20:35 UTC8h 35m
2026-07-06 QFA23 SYD → BKK Jul 6, 01:05 UTCJul 6, 10:10 UTC9h 5m
2026-07-05 QFA24 BKK → SYD Jul 5, 11:40 UTCJul 5, 20:35 UTC8h 55m
2026-07-05 QFA23 SYD → BKK Jul 5, 00:30 UTCJul 5, 09:40 UTC9h 10m
2026-07-04 QFA24 BKK → SYD Jul 4, 12:05 UTCJul 4, 20:55 UTC8h 50m
2026-07-04 QFA23 - Jul 4, 00:40 UTCJul 4, 10:05 UTC9h 25m
2026-07-03 QFA128 HKG → SYD Jul 3, 13:00 UTCJul 3, 21:35 UTC8h 35m
2026-07-03 QFA29 - Jul 3, 09:25 UTCJul 3, 09:55 UTC30m
2026-07-03 QFA29 - Jul 3, 00:50 UTCJul 3, 08:35 UTC7h 45m
2026-07-02 QFA36 - Jul 2, 17:50 UTCJul 2, 19:00 UTC1h 10m
2026-07-02 QFA36 - Jul 2, 12:30 UTCJul 2, 12:40 UTC10m
2026-07-02 QFA51 - Jul 2, 01:35 UTCJul 2, 05:25 UTC3h 50m
2026-07-01 QFA6014 - Jul 1, 21:20 UTCJul 1, 22:30 UTC1h 10m

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-QPA page for operator, model, and routing details .

Mode-S 7C531C frequently asked

What is Mode-S code 7C531C?
7C531C is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-QPA.
Where is Mode-S 7C531C registered?
Mode-S code 7C531C is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C531C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C531C, octal 37051434, decimal 8,147,740.
What flights does 7C531C operate?
Mode-S 7C531C has broadcast 20 distinct callsigns, including QFA59, QFA60, QFA127, QFA30, QFA24.