Apparatus

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sensors Mode-S transponder

7C6D99

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-VXN · BOEING 737-800 · operated by QANTAS AIRWAYS LIMITED

Hex
7C6D99
Octal
37066631
Decimal
8,154,521
Country
AU
Tail
VH-VXN
Type
B738
No current signal · last broadcast 11d ago
Flights observed
288
Distinct callsigns
20
Country
AU
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S 7C6D99.

Country allocation

The ICAO 24-bit address 7C6D99 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
QFA824 Qantas 7 2026-07-22
QFA628 Qantas 6 2026-07-23
QFA442 - 5 2026-07-16
QFA410 - 5 2026-06-28
QFA825 - 4 2026-07-02
QFA739 - 4 2026-07-15
QFA632 - 4 2026-07-04
QFA619 - 4 2026-07-06
QFA595 Qantas 4 2026-07-20
QFA594 Qantas 4 2026-07-20
QFA473 - 4 2026-06-29
QFA425 - 4 2026-07-15
QFA760 Qantas 3 2026-06-04
QFA740 Qantas 3 2026-07-21
QFA686 - 3 2026-07-04
QFA671 Qantas 3 2026-07-20
QFA631 - 3 2026-07-12
QFA625 - 3 2026-07-05
QFA621 - 3 2026-07-17
QFA616 Qantas 3 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA750 ADL → SYD Jul 26, 20:45 UTCJul 26, 22:15 UTC1h 30m
2026-07-26 QFA827 DRW → BNE Jul 26, 18:20 UTCJul 26, 18:45 UTC25m
2026-07-26 QFA826 MEL → CBR Jul 26, 10:35 UTCJul 26, 11:10 UTC35m
2026-07-25 QFA936 PER → BNE Jul 25, 02:50 UTCJul 25, 06:45 UTC3h 55m
2026-07-24 QFA937 BNE → PER Jul 24, 05:50 UTCJul 24, 08:50 UTC3h 0m
2026-07-24 QFA937 BNE → PER Jul 24, 03:50 UTCJul 24, 04:50 UTC1h 0m
2026-07-24 QFA612 MEL → BNE Jul 24, 00:40 UTCJul 24, 02:20 UTC1h 40m
2026-07-23 QFA605 BNE → MEL Jul 23, 20:15 UTCJul 23, 22:30 UTC2h 15m
2026-07-23 QFA628 MEL → BNE Jul 23, 08:00 UTCJul 23, 09:45 UTC1h 45m
2026-07-23 QFA764 ADL → SYD Jul 23, 03:30 UTCJul 23, 06:45 UTC3h 15m
2026-07-22 QFA1382 PER → KFE Jul 22, 21:50 UTCJul 23, 02:05 UTC4h 15m
2026-07-22 QFA941 BNE → PER Jul 22, 11:10 UTCJul 22, 13:55 UTC2h 45m
2026-07-22 QFA824 BNE → DRW Jul 22, 02:20 UTCJul 22, 02:35 UTC15m
2026-07-21 QFA824 BNE → DRW Jul 21, 22:25 UTCJul 21, 22:50 UTC25m
2026-07-21 QFA540 SYD → BNE Jul 21, 06:30 UTCJul 21, 07:35 UTC1h 5m
2026-07-21 QFA740 ADL → SYD Jul 21, 03:25 UTCJul 21, 04:50 UTC1h 25m
2026-07-21 QFA679 MEL → ADL Jul 21, 01:00 UTCJul 21, 02:10 UTC1h 10m
2026-07-20 QFA674 ADL → MEL Jul 20, 22:25 UTCJul 20, 23:20 UTC55m
2026-07-20 QFA671 MEL → ADL Jul 20, 20:25 UTCJul 20, 21:25 UTC1h 0m
2026-07-20 QFA479 SYD → MEL Jul 20, 08:25 UTCJul 20, 09:55 UTC1h 30m
2026-07-20 QFA595 ADL → PER Jul 20, 06:00 UTCJul 20, 07:05 UTC1h 5m
2026-07-20 QFA594 PER → BNE Jul 20, 04:00 UTCJul 20, 05:00 UTC1h 0m
2026-07-20 QFA436 MEL → SYD Jul 20, 01:00 UTCJul 20, 02:05 UTC1h 5m
2026-07-19 QFA421 SYD → MEL Jul 19, 22:50 UTCJul 20, 00:00 UTC1h 10m
2026-07-19 QFA462 MEL → SYD Jul 19, 06:05 UTCJul 19, 07:10 UTC1h 5m
2026-07-17 QFA633 BNE → MEL Jul 17, 07:40 UTCJul 17, 09:40 UTC2h 0m
2026-07-17 QFA620 MEL → BNE Jul 17, 04:29 UTCJul 17, 06:25 UTC1h 55m
2026-07-17 QFA621 BNE → MEL Jul 17, 01:35 UTCJul 17, 03:34 UTC2h 0m
2026-07-16 QFA608 MEL → BNE Jul 16, 22:10 UTCJul 17, 00:04 UTC1h 55m
2026-07-16 QFA483 SYD → MEL Jul 16, 09:20 UTCJul 16, 10:25 UTC1h 5m
2026-07-16 QFA466 MEL → SYD Jul 16, 06:40 UTCJul 16, 08:05 UTC1h 25m
2026-07-16 QFA449 SYD → MEL Jul 16, 04:35 UTCJul 16, 05:35 UTC1h 0m
2026-07-16 QFA442 MEL → SYD Jul 16, 02:25 UTCJul 16, 03:30 UTC1h 5m
2026-07-15 QFA425 SYD → MEL Jul 15, 23:10 UTCJul 16, 00:15 UTC1h 5m
2026-07-15 QFA744 - Jul 15, 07:45 UTCJul 15, 09:30 UTC1h 45m
2026-07-15 QFA739 SYD → ADL Jul 15, 04:50 UTCJul 15, 06:25 UTC1h 35m
2026-07-15 QFA442 MEL → SYD Jul 15, 02:15 UTCJul 15, 03:15 UTC1h 0m
2026-07-13 QFA483 SYD → MEL Jul 13, 09:05 UTCJul 13, 10:30 UTC1h 25m
2026-07-13 QFA462 MEL → SYD Jul 13, 06:15 UTCJul 13, 07:15 UTC1h 0m
2026-07-13 QFA447 SYD → MEL Jul 13, 03:50 UTCJul 13, 05:05 UTC1h 15m
2026-07-13 QFA436 MEL → SYD Jul 13, 01:30 UTCJul 13, 02:30 UTC1h 0m
2026-07-12 QFA421 SYD → MEL Jul 12, 22:50 UTCJul 13, 00:10 UTC1h 20m
2026-07-12 QFA490 MEL → SYD Jul 12, 10:35 UTCJul 12, 11:35 UTC1h 0m
2026-07-12 QFA631 BNE → MEL Jul 12, 06:35 UTCJul 12, 08:50 UTC2h 15m
2026-07-12 QFA618 MEL → BNE Jul 12, 03:35 UTCJul 12, 05:15 UTC1h 40m
2026-07-11 QFA425 SYD → MEL Jul 11, 23:15 UTCJul 12, 00:35 UTC1h 20m
2026-07-11 QFA533 BNE → SYD Jul 11, 04:10 UTCJul 11, 05:20 UTC1h 10m
2026-07-10 QFA610 MEL → BNE Jul 10, 23:30 UTCJul 11, 01:15 UTC1h 45m
2026-07-10 QFA605 BNE → MEL Jul 10, 20:10 UTCJul 10, 22:15 UTC2h 5m
2026-07-10 QFA554 SYD → BNE Jul 10, 11:10 UTCJul 10, 12:20 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-VXN page for operator, model, and routing details .

Mode-S 7C6D99 frequently asked

What is Mode-S code 7C6D99?
7C6D99 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VXN.
Where is Mode-S 7C6D99 registered?
Mode-S code 7C6D99 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6D99 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6D99, octal 37066631, decimal 8,154,521.
What flights does 7C6D99 operate?
Mode-S 7C6D99 has broadcast 20 distinct callsigns, including QFA824, QFA628, QFA442, QFA410, QFA825.