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 QFA619 · 38,000 ft
Flights observed
153
Distinct callsigns
20
Country
AU
Last broadcast
13h 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
QFA934 Qantas 5 2026-05-01
QFA941 Qantas 4 2026-04-15
QFA558 Qantas 4 2026-05-11
QFA466 Qantas 4 2026-05-20
QFA940 Qantas 3 2026-05-06
QFA937 Qantas 3 2026-05-06
QFA932 Qantas 3 2026-05-05
QFA824 Qantas 3 2026-05-26
QFA735 Qantas 3 2026-05-10
QFA653 Qantas 3 2026-04-17
QFA651 Qantas 3 2026-05-08
QFA631 Qantas 3 2026-04-18
QFA485 Qantas 3 2026-05-20
QFA919 Qantas 2 2026-05-20
QFA918 Qantas 2 2026-05-19
QFA825 Qantas 2 2026-05-27
QFA764 Qantas 2 2026-05-29
QFA740 Qantas 2 2026-05-10
QFA732 Qantas 2 2026-05-21
QFA705 Qantas 2 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 QFA554 SYD → BNE May 29, 10:05 UTCMay 29, 11:15 UTC1h 10m
2026-05-29 QFA474 MEL → SYD May 29, 07:30 UTCMay 29, 08:40 UTC1h 10m
2026-05-29 QFA764 ADL → SYD May 29, 03:25 UTCMay 29, 06:25 UTC3h 0m
2026-05-28 QFA933 BNE → PER May 28, 20:05 UTCMay 29, 01:45 UTC5h 40m
2026-05-27 QFA825 DRW → BNE May 27, 06:09 UTCMay 27, 06:44 UTC35m
2026-05-26 QFA824 BNE → DRW May 26, 22:25 UTCMay 26, 22:59 UTC35m
2026-05-26 QFA540 SYD → BNE May 26, 06:29 UTCMay 26, 07:45 UTC1h 15m
2026-05-26 QFA450 MEL → SYD May 26, 04:15 UTCMay 26, 05:20 UTC1h 5m
2026-05-25 QFA425 SYD → MEL May 25, 23:40 UTCMay 26, 00:49 UTC1h 10m
2026-05-25 QFA406 MEL → SYD May 25, 20:55 UTCMay 25, 22:15 UTC1h 20m
2026-05-24 QFA477 SYD → MEL May 24, 08:25 UTCMay 24, 09:40 UTC1h 15m
2026-05-24 QFA462 MEL → SYD May 24, 06:20 UTCMay 24, 07:25 UTC1h 5m
2026-05-24 QFA443 SYD → MEL May 24, 03:05 UTCMay 24, 04:15 UTC1h 10m
2026-05-23 QFA736 ADL → SYD May 23, 23:30 UTCMay 24, 01:00 UTC1h 30m
2026-05-23 QFA671 MEL → ADL May 23, 20:25 UTCMay 23, 21:35 UTC1h 10m
2026-05-23 QFA461 SYD → MEL May 23, 06:25 UTCMay 23, 07:25 UTC1h 0m
2026-05-23 QFA448 MEL → SYD May 23, 03:45 UTCMay 23, 04:50 UTC1h 5m
2026-05-22 QFA838 MEL → DRW May 22, 11:10 UTCMay 23, 00:30 UTC13h 20m
2026-05-22 QFA479 SYD → MEL May 22, 08:30 UTCMay 22, 09:35 UTC1h 5m
2026-05-22 QFA923 CNS → SYD May 22, 00:00 UTCMay 22, 06:15 UTC6h 15m
2026-05-21 QFA732 ADL → SYD May 21, 21:10 UTCMay 21, 22:40 UTC1h 30m
2026-05-21 QFA697 MEL → ADL May 21, 09:15 UTCMay 21, 10:15 UTC1h 0m
2026-05-21 QFA629 BNE → MEL May 21, 05:35 UTCMay 21, 07:40 UTC2h 5m
2026-05-21 QFA616 MEL → BNE May 21, 02:40 UTCMay 21, 04:35 UTC1h 55m
2026-05-20 QFA615 BNE → MEL May 20, 23:20 UTCMay 21, 01:30 UTC2h 10m
2026-05-20 QFA600 MEL → BNE May 20, 20:15 UTCMay 20, 22:10 UTC1h 55m
2026-05-20 QFA485 MEL → PER May 20, 09:25 UTCMay 20, 10:30 UTC1h 5m
2026-05-20 QFA466 MEL → SYD May 20, 06:45 UTCMay 20, 07:50 UTC1h 5m
2026-05-20 QFA919 KTA → PER May 20, 03:15 UTCMay 20, 05:25 UTC2h 11m
2026-05-19 QFA918 PER → KTA May 19, 23:55 UTCMay 20, 01:50 UTC1h 55m
2026-05-19 QFA605 BNE → MEL May 19, 20:20 UTCMay 19, 22:35 UTC2h 15m
2026-05-19 QFA946 MEL → CBR May 19, 08:20 UTCMay 19, 12:25 UTC4h 5m
2026-05-19 QFA945 CBR → MEL May 19, 01:35 UTCMay 19, 06:50 UTC5h 15m
2026-05-11 QFA558 SYD → BNE May 11, 12:30 UTCMay 11, 13:35 UTC1h 5m
2026-05-11 QFA468 MEL → SYD May 11, 06:50 UTCMay 11, 08:00 UTC1h 10m
2026-05-11 QFA625 BNE → MEL May 11, 03:40 UTCMay 11, 05:35 UTC1h 55m
2026-05-10 QFA610 MEL → BNE May 10, 23:25 UTCMay 11, 01:20 UTC1h 55m
2026-05-10 QFA407 SYD → MEL May 10, 20:54 UTCMay 10, 22:05 UTC1h 10m
2026-05-10 QFA484 MEL → SYD May 10, 09:00 UTCMay 10, 10:05 UTC1h 5m
2026-05-10 QFA465 SYD → MEL May 10, 06:45 UTCMay 10, 07:45 UTC1h 0m
2026-05-10 QFA740 ADL → SYD May 10, 03:20 UTCMay 10, 05:04 UTC1h 45m
2026-05-10 QFA735 SYD → ADL May 10, 00:39 UTCMay 10, 02:20 UTC1h 40m
2026-05-09 QFA418 MEL → SYD May 9, 22:05 UTCMay 9, 23:09 UTC1h 5m
2026-05-09 QFA764 ADL → SYD May 9, 02:50 UTCMay 9, 06:50 UTC4h 0m
2026-05-08 QFA651 BNE → PER May 8, 07:14 UTCMay 8, 11:19 UTC4h 5m
2026-05-08 QFA644 PER → SYD May 8, 01:29 UTCMay 8, 05:59 UTC4h 30m
2026-05-07 QFA651 BNE → PER May 7, 07:00 UTCMay 7, 11:15 UTC4h 15m
2026-05-07 QFA740 ADL → SYD May 7, 03:40 UTCMay 7, 05:25 UTC1h 45m
2026-05-07 QFA735 SYD → ADL May 7, 02:10 UTCMay 7, 02:35 UTC25m
2026-05-07 QFA735 SYD → ADL May 7, 00:50 UTCMay 7, 01:25 UTC35m

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 QFA934, QFA941, QFA558, QFA466, QFA940.