Apparatus

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sensors Mode-S transponder

7C6D91

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6D91
Octal
37066621
Decimal
8,154,513
Country
AU
Tail
VH-VXF
Type
B738
Broadcasting now · callsign QFA529 · 38,000 ft
Flights observed
315
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Current position

7C6D91 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7C6D91 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
QFA651 - 8 2026-07-03
QFA934 - 7 2026-06-24
QFA644 - 7 2026-07-03
QFA466 - 6 2026-06-17
QFA937 - 5 2026-06-26
QFA653 - 5 2026-06-25
QFA436 - 5 2026-07-07
QFA941 Qantas 4 2026-04-15
QFA631 - 4 2026-06-28
QFA558 Qantas 4 2026-05-11
QFA485 Qantas 4 2026-06-06
QFA477 - 4 2026-07-07
QFA444 - 4 2026-07-11
QFA940 Qantas 3 2026-05-06
QFA932 Qantas 3 2026-05-05
QFA824 Qantas 3 2026-05-26
QFA764 - 3 2026-07-05
QFA735 Qantas 3 2026-05-10
QFA633 - 3 2026-06-27
QFA629 - 3 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QFA610 MEL → BNE Jul 13, 23:35 UTCJul 14, 01:25 UTC1h 50m
2026-07-13 QFA401 - Jul 13, 20:20 UTCJul 13, 21:35 UTC1h 15m
2026-07-13 QFA746 - Jul 13, 09:50 UTCJul 13, 11:25 UTC1h 35m
2026-07-13 QFA741 SYD → ADL Jul 13, 07:10 UTCJul 13, 08:55 UTC1h 45m
2026-07-13 QFA535 BNE → SYD Jul 13, 04:40 UTCJul 13, 05:50 UTC1h 10m
2026-07-13 QFA524 - Jul 13, 02:30 UTCJul 13, 03:40 UTC1h 10m
2026-07-12 QFA428 MEL → SYD Jul 12, 23:45 UTCJul 13, 00:45 UTC1h 0m
2026-07-12 QFA605 BNE → MEL Jul 12, 20:20 UTCJul 12, 22:30 UTC2h 10m
2026-07-11 QFA538 SYD → BNE Jul 11, 06:10 UTCJul 11, 07:10 UTC1h 0m
2026-07-11 QFA444 MEL → SYD Jul 11, 03:01 UTCJul 11, 04:05 UTC1h 5m
2026-07-10 QFA837 - Jul 10, 23:50 UTCJul 11, 00:25 UTC35m
2026-07-10 QFA842 - Jul 10, 11:20 UTCJul 10, 11:55 UTC35m
2026-07-10 QFA744 ADL → SYD Jul 10, 08:00 UTCJul 10, 10:00 UTC2h 0m
2026-07-10 QFA739 SYD → ADL Jul 10, 05:05 UTCJul 10, 06:55 UTC1h 50m
2026-07-10 QFA444 MEL → SYD Jul 10, 02:50 UTCJul 10, 03:55 UTC1h 5m
2026-07-09 QFA409 - Jul 9, 21:20 UTCJul 9, 22:35 UTC1h 15m
2026-07-09 QFA924 SYD → SYD Jul 9, 04:35 UTCJul 9, 10:55 UTC6h 20m
2026-07-09 QFA593 - Jul 9, 01:45 UTCJul 9, 02:45 UTC1h 0m
2026-07-08 QFA592 - Jul 8, 23:40 UTCJul 9, 00:45 UTC1h 5m
2026-07-08 QFA470 MEL → SYD Jul 8, 07:35 UTCJul 8, 08:35 UTC1h 0m
2026-07-07 QFA702 MEL → MEL Jul 7, 23:05 UTCJul 8, 06:05 UTC7h 0m
2026-07-07 QFA839 - Jul 7, 19:40 UTCJul 7, 20:15 UTC35m
2026-07-07 QFA838 - Jul 7, 11:10 UTCJul 7, 11:45 UTC35m
2026-07-07 QFA477 SYD → MEL Jul 7, 08:50 UTCJul 7, 10:00 UTC1h 10m
2026-07-07 QFA458 MEL → SYD Jul 7, 06:45 UTCJul 7, 07:50 UTC1h 5m
2026-07-07 QFA445 SYD → MEL Jul 7, 04:25 UTCJul 7, 05:35 UTC1h 10m
2026-07-07 QFA436 MEL → SYD Jul 7, 02:00 UTCJul 7, 03:10 UTC1h 10m
2026-07-06 QFA421 SYD → MEL Jul 6, 23:05 UTCJul 7, 00:55 UTC1h 50m
2026-07-06 QFA476 MEL → SYD Jul 6, 07:50 UTCJul 6, 09:00 UTC1h 10m
2026-07-06 QFA453 SYD → MEL Jul 6, 05:45 UTCJul 6, 06:45 UTC1h 0m
2026-07-06 QFA738 ADL → SYD Jul 6, 03:05 UTCJul 6, 04:45 UTC1h 40m
2026-07-06 QFA733 SYD → ADL Jul 6, 00:10 UTCJul 6, 02:05 UTC1h 55m
2026-07-05 QFA843 SYD → SYD Jul 5, 10:40 UTCJul 5, 20:05 UTC9h 25m
2026-07-05 QFA474 MEL → SYD Jul 5, 07:40 UTCJul 5, 08:50 UTC1h 10m
2026-07-05 QFA764 PER → MEL Jul 5, 02:45 UTCJul 5, 06:00 UTC3h 15m
2026-07-03 QFA651 SYD → PER Jul 3, 06:40 UTCJul 3, 11:15 UTC4h 35m
2026-07-03 QFA644 PER → SYD Jul 3, 01:15 UTCJul 3, 05:25 UTC4h 10m
2026-07-02 QFA883 ADL → PER Jul 2, 20:45 UTCJul 2, 23:35 UTC2h 50m
2026-07-02 QFA697 MEL → ADL Jul 2, 09:35 UTCJul 2, 10:45 UTC1h 10m
2026-07-02 QFA690 ADL → MEL Jul 2, 07:15 UTCJul 2, 08:25 UTC1h 10m
2026-07-02 QFA687 MEL → ADL Jul 2, 05:10 UTCJul 2, 06:20 UTC1h 10m
2026-07-02 QFA682 ADL → MEL Jul 2, 03:10 UTCJul 2, 04:15 UTC1h 5m
2026-07-02 QFA679 MEL → ADL Jul 2, 00:55 UTCJul 2, 02:15 UTC1h 20m
2026-07-01 QFA674 ADL → MEL Jul 1, 22:50 UTCJul 1, 23:50 UTC1h 0m
2026-07-01 QFA671 MEL → ADL Jul 1, 20:25 UTCJul 1, 21:55 UTC1h 30m
2026-07-01 QFA477 - Jul 1, 08:30 UTCJul 1, 09:45 UTC1h 15m
2026-07-01 QFA595 - Jul 1, 06:00 UTCJul 1, 07:05 UTC1h 5m
2026-07-01 QFA594 - Jul 1, 04:00 UTCJul 1, 05:00 UTC1h 0m
2026-07-01 QFA438 MEL → SYD Jul 1, 01:20 UTCJul 1, 02:20 UTC1h 0m
2026-06-30 QFA429 SYD → MEL Jun 30, 22:20 UTCJun 30, 23:50 UTC1h 30m

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

Mode-S 7C6D91 frequently asked

What is Mode-S code 7C6D91?
7C6D91 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VXF.
Where is Mode-S 7C6D91 registered?
Mode-S code 7C6D91 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6D91 broadcasting right now?
Yes. Mode-S 7C6D91 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6D91, octal 37066621, decimal 8,154,513.
What flights does 7C6D91 operate?
Mode-S 7C6D91 has broadcast 20 distinct callsigns, including QFA651, QFA934, QFA644, QFA466, QFA937.