Apparatus

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sensors Mode-S transponder

7C531E

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C531E
Octal
37051436
Decimal
8,147,742
Country
AU
Tail
VH-QPC
Type
A333
Broadcasting now · callsign QFA26 · 39,000 ft
Flights observed
124
Distinct callsigns
20
Country
AU
Last broadcast
6h ago

Current position

7C531E is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7C531E 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
QFA127 Qantas 21 2026-05-26
QFA128 Qantas 15 2026-05-28
QFA29 Qantas 12 2026-05-28
QFA23 Qantas 11 2026-05-24
QFA24 Qantas 10 2026-05-24
QFA30 Qantas 9 2026-05-26
QFA79 Qantas 6 2026-05-11
QFA80 Qantas 5 2026-05-13
QFA26 Qantas 5 2026-05-29
QFA25 Qantas 5 2026-05-29
QFA19 Qantas 4 2026-05-19
QFA62 Qantas 3 2026-05-12
QFA61 Qantas 3 2026-05-13
QFA20 Qantas 3 2026-05-19
QFA60 Qantas 2 2026-05-21
QFA59 Qantas 2 2026-05-21
QFA444 Qantas 2 2026-04-18
QFA36 Qantas 2 2026-05-27
QFA35 Qantas 2 2026-05-27
QFA38 Qantas 1 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 QFA26 HND → SYD May 29, 22:15 UTCMay 29, 22:45 UTC30m
2026-05-29 QFA25 SYD → HND May 29, 10:45 UTCMay 29, 19:55 UTC9h 10m
2026-05-28 QFA128 HKG → SYD May 28, 11:50 UTCMay 28, 20:45 UTC8h 55m
2026-05-28 QFA29 MEL → LHR May 28, 08:55 UTCMay 28, 09:10 UTC15m
2026-05-28 QFA29 MEL → LHR May 28, 00:40 UTCMay 28, 08:15 UTC7h 35m
2026-05-27 QFA36 SIN → MEL May 27, 12:30 UTCMay 27, 19:20 UTC6h 50m
2026-05-27 QFA35 MEL → SIN May 27, 02:34 UTCMay 27, 03:45 UTC1h 10m
2026-05-26 QFA30 HKG → MEL May 26, 12:50 UTCMay 26, 21:40 UTC8h 50m
2026-05-26 QFA127 SYD → HKG May 26, 09:45 UTCMay 26, 10:20 UTC35m
2026-05-26 QFA127 SYD → HKG May 26, 01:10 UTCMay 26, 08:50 UTC7h 40m
2026-05-25 QFA128 HKG → SYD May 25, 11:55 UTCMay 25, 20:15 UTC8h 20m
2026-05-25 QFA127 SYD → HKG May 25, 09:45 UTCMay 25, 10:10 UTC25m
2026-05-25 QFA127 SYD → HKG May 25, 08:25 UTCMay 25, 08:50 UTC25m
2026-05-24 QFA24 BKK → SYD May 24, 11:40 UTCMay 24, 20:15 UTC8h 35m
2026-05-24 QFA23 SYD → BKK May 24, 00:40 UTCMay 24, 10:00 UTC9h 20m
2026-05-22 QFA24 BKK → SYD May 22, 15:20 UTCMay 22, 23:40 UTC8h 20m
2026-05-22 QFA23 SYD → BKK May 22, 04:20 UTCMay 22, 13:30 UTC9h 10m
2026-05-21 QFA60 HND → SYD May 21, 13:25 UTCMay 21, 22:30 UTC9h 5m
2026-05-21 QFA59 SYD → HND May 21, 01:30 UTCMay 21, 11:00 UTC9h 30m
2026-05-20 QFA24 BKK → SYD May 20, 11:40 UTCMay 20, 20:30 UTC8h 50m
2026-05-20 QFA23 SYD → BKK May 20, 00:10 UTCMay 20, 09:30 UTC9h 21m
2026-05-19 QFA20 MNL → SYD May 19, 12:50 UTCMay 19, 20:10 UTC7h 20m
2026-05-19 QFA19 SYD → MNL May 19, 02:35 UTCMay 19, 10:35 UTC8h 0m
2026-05-18 QFA60 HND → SYD May 18, 13:15 UTCMay 18, 22:30 UTC9h 14m
2026-05-18 QFA59 SYD → HND May 18, 01:40 UTCMay 18, 11:10 UTC9h 30m
2026-05-16 QFA128 HKG → SYD May 16, 20:20 UTCMay 16, 20:50 UTC30m
2026-05-16 QFA128 HKG → SYD May 16, 12:21 UTCMay 16, 13:55 UTC1h 35m
2026-05-16 QFA29 MEL → LHR May 16, 09:25 UTCMay 16, 09:51 UTC25m
2026-05-16 QFA29 MEL → LHR May 16, 00:45 UTCMay 16, 08:36 UTC7h 51m
2026-05-15 QFA30 HKG → MEL May 15, 12:40 UTCMay 15, 21:15 UTC8h 34m
2026-05-15 QFA29 MEL → LHR May 15, 09:20 UTCMay 15, 09:40 UTC20m
2026-05-15 QFA29 MEL → LHR May 15, 00:40 UTCMay 15, 08:25 UTC7h 45m
2026-05-14 QFA38 SIN → MEL May 14, 15:50 UTCMay 14, 22:45 UTC6h 55m
2026-05-14 QFA37 MEL → SIN May 14, 06:00 UTCMay 14, 07:05 UTC1h 5m
2026-05-13 QFA80 NRT → MEL May 13, 12:05 UTCMay 13, 21:55 UTC9h 50m
2026-05-13 QFA61 BNE → HND May 13, 01:00 UTCMay 13, 09:45 UTC8h 45m
2026-05-12 QFA62 NRT → BNE May 12, 13:00 UTCMay 12, 21:20 UTC8h 20m
2026-05-12 QFA61 BNE → HND May 12, 08:55 UTCMay 12, 09:40 UTC45m
2026-05-11 QFA62 NRT → BNE May 11, 13:05 UTCMay 11, 21:20 UTC8h 16m
2026-05-11 QFA79 MEL → HND May 11, 00:00 UTCMay 11, 10:05 UTC10h 5m
2026-05-10 QFA30 HKG → MEL May 10, 12:15 UTCMay 10, 20:35 UTC8h 20m
2026-05-10 QFA127 SYD → HKG May 10, 09:40 UTCMay 10, 09:55 UTC15m
2026-05-10 QFA127 SYD → HKG May 10, 00:39 UTCMay 10, 08:35 UTC7h 55m
2026-05-09 QFA24 BKK → SYD May 9, 11:40 UTCMay 9, 20:20 UTC8h 40m
2026-05-09 QFA23 SYD → BKK May 9, 00:35 UTCMay 9, 09:55 UTC9h 20m
2026-05-07 QFA26 HND → SYD May 7, 22:50 UTCMay 8, 07:59 UTC9h 10m
2026-05-07 QFA25 SYD → HND May 7, 11:30 UTCMay 7, 21:00 UTC9h 30m
2026-05-06 QFA26 HND → SYD May 6, 22:05 UTCMay 7, 07:15 UTC9h 10m
2026-05-06 QFA25 SYD → HND May 6, 10:55 UTCMay 6, 20:20 UTC9h 25m
2026-05-05 QFA20 MNL → SYD May 5, 13:25 UTCMay 5, 20:30 UTC7h 5m

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

Mode-S 7C531E frequently asked

What is Mode-S code 7C531E?
7C531E is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-QPC.
Where is Mode-S 7C531E registered?
Mode-S code 7C531E is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C531E broadcasting right now?
Yes. Mode-S 7C531E is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C531E, octal 37051436, decimal 8,147,742.
What flights does 7C531E operate?
Mode-S 7C531E has broadcast 20 distinct callsigns, including QFA127, QFA128, QFA29, QFA23, QFA24.