Apparatus

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sensors Mode-S transponder

7C531F

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C531F
Octal
37051437
Decimal
8,147,743
Country
AU
Tail
VH-QPD
Type
A333
No current signal · last broadcast 2h ago
Flights observed
195
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7C531F.

Country allocation

The ICAO 24-bit address 7C531F 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
QFA26 - 29 2026-07-13
QFA25 - 28 2026-07-13
QFA29 Qantas 17 2026-05-17
QFA127 Qantas 10 2026-05-24
QFA128 Qantas 9 2026-05-24
QFA61 Qantas 8 2026-06-07
QFA60 Qantas 8 2026-07-07
QFA59 - 8 2026-07-07
QFA24 Qantas 8 2026-07-02
QFA23 - 8 2026-07-02
QFA62 Qantas 7 2026-06-07
QFA52 Qantas 7 2026-06-06
QFA80 Qantas 6 2026-05-16
QFA79 Qantas 5 2026-05-12
QFA51 Qantas 5 2026-06-06
QFA30 Qantas 5 2026-05-11
QFA20 Qantas 4 2026-06-27
QFA19 - 4 2026-06-27
QFA98 Qantas 2 2026-06-04
QFA97 Qantas 2 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QFA26 - Jul 13, 22:05 UTCJul 14, 05:25 UTC7h 20m
2026-07-13 QFA25 SYD → HND Jul 13, 10:40 UTCJul 13, 20:10 UTC9h 30m
2026-07-12 QFA26 HND → SYD Jul 12, 22:35 UTCJul 13, 07:40 UTC9h 5m
2026-07-12 QFA25 SYD → HND Jul 12, 11:15 UTCJul 12, 20:45 UTC9h 30m
2026-07-11 QFA26 HND → SYD Jul 11, 23:45 UTCJul 12, 09:05 UTC9h 20m
2026-07-11 QFA25 SYD → HND Jul 11, 12:30 UTCJul 11, 21:55 UTC9h 25m
2026-07-10 QFA26 HND → SYD Jul 10, 22:10 UTCJul 11, 07:15 UTC9h 5m
2026-07-10 QFA25 SYD → HND Jul 10, 10:45 UTCJul 10, 20:25 UTC9h 40m
2026-07-09 QFA26 HND → SYD Jul 9, 22:15 UTCJul 10, 07:10 UTC8h 55m
2026-07-09 QFA25 SYD → HND Jul 9, 10:50 UTCJul 9, 20:30 UTC9h 40m
2026-07-08 QFA26 - Jul 8, 22:05 UTCJul 9, 06:55 UTC8h 50m
2026-07-08 QFA25 SYD → HND Jul 8, 10:40 UTCJul 8, 20:15 UTC9h 35m
2026-07-07 QFA60 HND → SYD Jul 7, 13:30 UTCJul 7, 22:30 UTC9h 0m
2026-07-07 QFA59 SYD → HND Jul 7, 02:00 UTCJul 7, 11:35 UTC9h 35m
2026-07-06 QFA60 HND → SYD Jul 6, 13:55 UTCJul 6, 23:15 UTC9h 20m
2026-07-06 QFA59 SYD → HND Jul 6, 02:20 UTCJul 6, 11:55 UTC9h 35m
2026-07-05 QFA042 - Jul 5, 13:55 UTCJul 5, 20:10 UTC6h 15m
2026-07-05 QFA041 SYD → CGK Jul 5, 04:35 UTCJul 5, 11:35 UTC7h 0m
2026-07-04 QFA60 HND → SYD Jul 4, 13:20 UTCJul 4, 22:05 UTC8h 45m
2026-07-04 QFA59 SYD → HND Jul 4, 01:35 UTCJul 4, 11:10 UTC9h 35m
2026-07-03 QFA60 HND → SYD Jul 3, 13:20 UTCJul 3, 22:25 UTC9h 5m
2026-07-03 QFA59 SYD → HND Jul 3, 02:00 UTCJul 3, 11:30 UTC9h 30m
2026-07-02 QFA24 BKK → SYD Jul 2, 12:10 UTCJul 2, 20:30 UTC8h 20m
2026-07-02 QFA23 SYD → BKK Jul 2, 00:20 UTCJul 2, 09:40 UTC9h 20m
2026-07-01 QFA24 BKK → SYD Jul 1, 13:55 UTCJul 1, 20:35 UTC6h 40m
2026-07-01 QFA24 BKK → SYD Jul 1, 12:15 UTCJul 1, 12:25 UTC10m
2026-07-01 QFA23 - Jul 1, 10:05 UTCJul 1, 10:25 UTC20m
2026-07-01 QFA23 - Jul 1, 01:00 UTCJul 1, 08:30 UTC7h 30m
2026-06-29 QFA26 - Jun 29, 22:05 UTCJun 30, 07:10 UTC9h 6m
2026-06-29 QFA25 SYD → HND Jun 29, 10:44 UTCJun 29, 20:00 UTC9h 15m
2026-06-28 QFA26 HND → SYD Jun 28, 22:20 UTCJun 29, 07:34 UTC9h 15m
2026-06-28 QFA25 SYD → HND Jun 28, 11:25 UTCJun 28, 20:34 UTC9h 10m
2026-06-27 QFA20 MNL → SYD Jun 27, 13:04 UTCJun 27, 20:44 UTC7h 40m
2026-06-27 QFA19 - Jun 27, 02:55 UTCJun 27, 03:49 UTC55m
2026-06-26 QFA60 HND → SYD Jun 26, 14:29 UTCJun 26, 23:34 UTC9h 5m
2026-06-26 QFA59 SYD → HND Jun 26, 02:44 UTCJun 26, 12:14 UTC9h 30m
2026-06-24 QFA26 HND → SYD Jun 24, 22:04 UTCJun 25, 07:05 UTC9h 0m
2026-06-24 QFA25 SYD → HND Jun 24, 10:49 UTCJun 24, 20:20 UTC9h 30m
2026-06-23 QFA26 HND → SYD Jun 23, 22:10 UTCJun 24, 07:15 UTC9h 5m
2026-06-23 QFA25 SYD → HND Jun 23, 10:39 UTCJun 23, 20:04 UTC9h 25m
2026-06-22 QFA26 HND → SYD Jun 22, 22:15 UTCJun 23, 07:45 UTC9h 30m
2026-06-22 QFA25 SYD → HND Jun 22, 10:44 UTCJun 22, 20:04 UTC9h 20m
2026-06-21 QFA26 - Jun 21, 22:24 UTCJun 22, 07:19 UTC8h 55m
2026-06-21 QFA25 SYD → HND Jun 21, 10:49 UTCJun 21, 20:34 UTC9h 45m
2026-06-20 QFA24 BKK → SYD Jun 20, 11:40 UTCJun 20, 20:29 UTC8h 50m
2026-06-20 QFA23 SYD → BKK Jun 20, 00:39 UTCJun 20, 09:49 UTC9h 10m
2026-06-19 QFA60 HND → SYD Jun 19, 13:09 UTCJun 19, 21:54 UTC8h 45m
2026-06-19 QFA59 SYD → HND Jun 19, 01:50 UTCJun 19, 11:30 UTC9h 40m
2026-06-18 QFA60 HND → SYD Jun 18, 13:20 UTCJun 18, 22:10 UTC8h 50m
2026-06-18 QFA59 SYD → HND Jun 18, 01:40 UTCJun 18, 11:05 UTC9h 25m

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

Mode-S 7C531F frequently asked

What is Mode-S code 7C531F?
7C531F is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-QPD.
Where is Mode-S 7C531F registered?
Mode-S code 7C531F is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C531F broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C531F, octal 37051437, decimal 8,147,743.
What flights does 7C531F operate?
Mode-S 7C531F has broadcast 20 distinct callsigns, including QFA26, QFA25, QFA29, QFA127, QFA128.