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
No current signal · last broadcast 1h ago
Flights observed
223
Distinct callsigns
20
Country
AU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 7C531E.

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 - 37 2026-07-13
QFA128 - 26 2026-07-09
QFA29 - 20 2026-07-08
QFA30 - 19 2026-07-13
QFA23 - 13 2026-07-10
QFA24 - 12 2026-07-10
QFA79 - 10 2026-07-14
QFA25 Qantas 10 2026-06-04
QFA19 - 10 2026-07-12
QFA26 Qantas 9 2026-06-04
QFA20 - 9 2026-07-12
QFA80 Qantas 7 2026-06-30
QFA62 Qantas 6 2026-06-29
QFA61 - 6 2026-06-30
QFA52 - 4 2026-06-20
QFA60 Qantas 3 2026-06-01
QFA59 Qantas 3 2026-06-01
QFA51 - 3 2026-06-21
QFA82 Qantas 2 2026-06-06
QFA444 Qantas 2 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QFA79 - Jul 14, 00:00 UTCJul 14, 09:30 UTC9h 30m
2026-07-13 QFA30 - Jul 13, 13:40 UTCJul 13, 21:10 UTC7h 30m
2026-07-13 QFA30 - Jul 13, 12:30 UTCJul 13, 12:45 UTC15m
2026-07-13 QFA127 - Jul 13, 09:05 UTCJul 13, 09:30 UTC25m
2026-07-13 QFA127 - Jul 13, 00:30 UTCJul 13, 08:10 UTC7h 40m
2026-07-12 QFA20 - Jul 12, 14:05 UTCJul 12, 21:30 UTC7h 25m
2026-07-12 QFA19 SYD → MNL Jul 12, 03:25 UTCJul 12, 11:25 UTC8h 0m
2026-07-11 QFA20 MNL → SYD Jul 11, 13:50 UTCJul 11, 21:10 UTC7h 20m
2026-07-11 QFA19 SYD → MNL Jul 11, 03:40 UTCJul 11, 11:40 UTC8h 0m
2026-07-10 QFA24 - Jul 10, 12:55 UTCJul 10, 21:30 UTC8h 35m
2026-07-10 QFA23 SYD → BKK Jul 10, 01:25 UTCJul 10, 10:55 UTC9h 30m
2026-07-09 QFA128 - Jul 9, 15:30 UTCJul 9, 23:10 UTC7h 40m
2026-07-09 QFA128 - Jul 9, 14:15 UTCJul 9, 14:35 UTC20m
2026-07-09 QFA127 - Jul 9, 09:45 UTCJul 9, 10:00 UTC15m
2026-07-09 QFA127 - Jul 9, 00:40 UTCJul 9, 08:50 UTC8h 10m
2026-07-08 QFA128 - Jul 8, 13:30 UTCJul 8, 20:40 UTC7h 10m
2026-07-08 QFA128 HKG → SYD Jul 8, 12:20 UTCJul 8, 12:40 UTC20m
2026-07-08 QFA29 - Jul 8, 09:40 UTCJul 8, 10:15 UTC35m
2026-07-08 QFA29 - Jul 8, 00:50 UTCJul 8, 08:55 UTC8h 5m
2026-07-07 QFA30 HKG → MEL Jul 7, 12:55 UTCJul 7, 21:00 UTC8h 5m
2026-07-07 QFA127 - Jul 7, 09:10 UTCJul 7, 09:45 UTC35m
2026-07-07 QFA127 - Jul 7, 00:30 UTCJul 7, 08:15 UTC7h 45m
2026-07-06 QFA128 HKG → SYD Jul 6, 12:50 UTCJul 6, 21:15 UTC8h 25m
2026-07-06 QFA127 - Jul 6, 10:15 UTCJul 6, 10:35 UTC20m
2026-07-06 QFA127 - Jul 6, 01:30 UTCJul 6, 09:05 UTC7h 35m
2026-07-04 QFA042 - Jul 4, 13:55 UTCJul 4, 20:20 UTC6h 25m
2026-07-04 QFA041 SYD → CGK Jul 4, 04:35 UTCJul 4, 11:40 UTC7h 5m
2026-07-03 QFA043 SYD → SYD Jul 3, 06:45 UTCJul 3, 20:10 UTC13h 25m
2026-07-03 QFA6015 BNE → SYD Jul 3, 02:50 UTCJul 3, 04:05 UTC1h 15m
2026-07-02 QFA62D NRT → BNE Jul 2, 10:10 UTCJul 2, 18:35 UTC8h 25m
2026-07-01 QFA79 MEL → NRT Jul 1, 01:55 UTCJul 1, 11:55 UTC10h 0m
2026-06-30 QFA80 NRT → MEL Jun 30, 13:10 UTCJun 30, 22:40 UTC9h 30m
2026-06-30 QFA61 BNE → NRT Jun 30, 02:45 UTCJun 30, 11:15 UTC8h 30m
2026-06-29 QFA62 NRT → BNE Jun 29, 13:19 UTCJun 29, 21:30 UTC8h 10m
2026-06-29 QFA79 MEL → NRT Jun 29, 00:24 UTCJun 29, 10:15 UTC9h 50m
2026-06-28 QFA30 HKG → MEL Jun 28, 13:45 UTCJun 28, 20:54 UTC7h 10m
2026-06-28 QFA30 HKG → MEL Jun 28, 12:29 UTCJun 28, 12:50 UTC20m
2026-06-28 QFA127 - Jun 28, 10:00 UTCJun 28, 10:19 UTC20m
2026-06-28 QFA127 - Jun 28, 01:25 UTCJun 28, 09:10 UTC7h 45m
2026-06-27 QFA128 HKG → SYD Jun 27, 14:45 UTCJun 27, 22:09 UTC7h 25m
2026-06-27 QFA128 HKG → SYD Jun 27, 13:40 UTCJun 27, 13:55 UTC15m
2026-06-27 QFA29 - Jun 27, 10:29 UTCJun 27, 11:00 UTC30m
2026-06-27 QFA29 - Jun 27, 01:49 UTCJun 27, 09:34 UTC7h 45m
2026-06-26 QFA30 HKG → MEL Jun 26, 16:20 UTCJun 26, 23:39 UTC7h 20m
2026-06-26 QFA30 HKG → MEL Jun 26, 15:10 UTCJun 26, 15:29 UTC20m
2026-06-26 QFA29 - Jun 26, 09:50 UTCJun 26, 10:05 UTC15m
2026-06-26 QFA29 - Jun 26, 01:15 UTCJun 26, 09:00 UTC7h 45m
2026-06-25 QFA30 HKG → MEL Jun 25, 14:09 UTCJun 25, 21:50 UTC7h 40m
2026-06-25 QFA30 HKG → MEL Jun 25, 13:00 UTCJun 25, 13:20 UTC20m
2026-06-25 QFA29 - Jun 25, 10:30 UTCJun 25, 10:45 UTC15m

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?
No active broadcast right now. Last signal was 1h ago.
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, QFA30, QFA23.