Apparatus

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sensors Mode-S transponder

7C6DE8

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DE8
Octal
37066750
Decimal
8,154,600
Country
AU
Tail
VH-VZU
Type
B738
No current signal · last broadcast 44m ago
Flights observed
172
Distinct callsigns
20
Country
AU
Last broadcast
44m ago

Last known position

Most recent position reported by Mode-S 7C6DE8.

Country allocation

The ICAO 24-bit address 7C6DE8 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
QFA146 Qantas 10 2026-05-14
QFA171 Qantas 5 2026-04-27
QFA162 Qantas 5 2026-05-14
QFA153 Qantas 5 2026-05-12
QFA941 Qantas 4 2026-05-24
QFA936 Qantas 4 2026-05-24
QFA172 Qantas 4 2026-04-28
QFA163 Qantas 4 2026-05-14
QFA647 - 3 2026-04-13
QFA474 Qantas 3 2026-05-26
QFA168 Qantas 3 2026-05-11
QFA152 Qantas 3 2026-05-12
QFA147 Qantas 3 2026-04-17
QFA122 Qantas 3 2026-05-30
QFA121 Qantas 3 2026-05-30
QFA946 Qantas 2 2026-05-29
QFA945 Qantas 2 2026-05-29
QFA919 Qantas 2 2026-05-27
QFA857 Qantas 2 2026-05-21
QFA856 Qantas 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 QFA122 ZQN → SYD May 30, 03:50 UTCMay 30, 04:00 UTC10m
2026-05-30 QFA121 SYD → ZQN May 30, 00:10 UTCMay 30, 02:30 UTC2h 20m
2026-05-29 QFA501 BNE → SYD May 29, 20:05 UTCMay 29, 21:15 UTC1h 10m
2026-05-29 QFA946 MEL → CBR May 29, 07:45 UTCMay 29, 11:30 UTC3h 45m
2026-05-29 QFA945 CBR → MEL May 29, 01:25 UTCMay 29, 06:45 UTC5h 20m
2026-05-28 QFA510 SYD → BNE May 28, 23:15 UTCMay 29, 00:25 UTC1h 10m
2026-05-28 QFA404 MEL → SYD May 28, 20:25 UTCMay 28, 21:40 UTC1h 15m
2026-05-28 QFA696 ADL → MEL May 28, 10:30 UTCMay 28, 11:30 UTC1h 0m
2026-05-28 QFA693 MEL → ADL May 28, 08:40 UTCMay 28, 09:40 UTC1h 0m
2026-05-28 QFA154 AKL → MEL May 28, 02:05 UTCMay 28, 05:40 UTC3h 35m
2026-05-27 QFA151 MEL → AKL May 27, 20:50 UTCMay 28, 00:00 UTC3h 10m
2026-05-27 QFA696 ADL → MEL May 27, 10:25 UTCMay 27, 11:25 UTC1h 0m
2026-05-27 QFA693 MEL → ADL May 27, 08:15 UTCMay 27, 09:15 UTC1h 0m
2026-05-27 QFA919 KTA → PER May 27, 04:14 UTCMay 27, 06:09 UTC1h 55m
2026-05-27 QFA918 PER → KTA May 27, 00:25 UTCMay 27, 02:39 UTC2h 15m
2026-05-26 QFA409 SYD → MEL May 26, 21:34 UTCMay 26, 22:54 UTC1h 20m
2026-05-26 QFA474 MEL → SYD May 26, 07:40 UTCMay 26, 08:54 UTC1h 15m
2026-05-26 QFA764 ADL → SYD May 26, 02:55 UTCMay 26, 06:10 UTC3h 15m
2026-05-25 QFA1087 ZNE → PER May 25, 21:24 UTCMay 26, 01:30 UTC4h 5m
2026-05-25 QFA78 SIN → PER May 25, 02:50 UTCMay 25, 07:50 UTC5h 0m
2026-05-24 QFA77 PER → SIN May 24, 15:20 UTCMay 24, 20:05 UTC4h 45m
2026-05-24 QFA941 BNE → PER May 24, 12:55 UTCMay 24, 13:25 UTC30m
2026-05-24 QFA941 BNE → PER May 24, 08:30 UTCMay 24, 11:05 UTC2h 35m
2026-05-24 QFA936 PER → BNE May 24, 02:45 UTCMay 24, 07:00 UTC4h 15m
2026-05-22 QFA775 MEL → PER May 22, 10:10 UTCMay 22, 13:45 UTC3h 35m
2026-05-22 QFA473 SYD → MEL May 22, 07:50 UTCMay 22, 08:55 UTC1h 5m
2026-05-22 QFA742 MEL → CBR May 22, 05:10 UTCMay 22, 06:45 UTC1h 35m
2026-05-22 QFA737 CBR → ADL May 22, 03:10 UTCMay 22, 04:05 UTC55m
2026-05-22 QFA737 CBR → ADL May 22, 02:15 UTCMay 22, 02:50 UTC35m
2026-05-21 QFA416 MEL → SYD May 21, 22:00 UTCMay 21, 23:05 UTC1h 5m
2026-05-21 QFA776 PER → MEL May 21, 16:10 UTCMay 21, 19:15 UTC3h 5m
2026-05-21 QFA857 CBR → PER May 21, 10:30 UTCMay 21, 14:40 UTC4h 10m
2026-05-21 QFA856 MEL → CBR May 21, 05:50 UTCMay 21, 09:25 UTC3h 35m
2026-05-21 QFA887 ADL → PER May 21, 01:30 UTCMay 21, 04:40 UTC3h 10m
2026-05-20 QFA882 PER → ADL May 20, 21:50 UTCMay 21, 00:25 UTC2h 35m
2026-05-20 QFA769 MEL → PER May 20, 04:50 UTCMay 20, 08:45 UTC3h 55m
2026-05-20 QFA682 ADL → MEL May 20, 02:40 UTCMay 20, 03:35 UTC55m
2026-05-20 QFA679 MEL → ADL May 20, 00:40 UTCMay 20, 01:40 UTC1h 0m
2026-05-19 QFA429 SYD → MEL May 19, 22:10 UTCMay 19, 23:15 UTC1h 5m
2026-05-18 QFA484 MEL → SYD May 18, 10:00 UTCMay 18, 11:10 UTC1h 10m
2026-05-18 QFA919 KTA → PER May 18, 06:50 UTCMay 18, 08:55 UTC2h 5m
2026-05-18 QFA6111 CNS → SYD May 18, 05:30 UTCMay 18, 05:45 UTC15m
2026-05-18 QFA934 PER → BNE May 18, 00:00 UTCMay 18, 04:11 UTC4h 10m
2026-05-17 QFA769 MEL → PER May 17, 05:00 UTCMay 17, 08:35 UTC3h 35m
2026-05-17 QFA762 PER → MEL May 17, 00:20 UTCMay 17, 03:50 UTC3h 30m
2026-05-16 QFA655 CNS → BNE May 16, 11:21 UTCMay 16, 14:25 UTC3h 5m
2026-05-16 QFA655 CNS → BNE May 16, 10:05 UTCMay 16, 10:40 UTC35m
2026-05-16 QFA136 CHC → SYD May 16, 05:05 UTCMay 16, 07:55 UTC2h 51m
2026-05-16 QFA137 SYD → CHC May 16, 01:00 UTCMay 16, 03:50 UTC2h 50m
2026-05-14 QFA102 NAN → SYD May 14, 23:05 UTCMay 15, 08:15 UTC9h 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-VZU page for operator, model, and routing details .

Mode-S 7C6DE8 frequently asked

What is Mode-S code 7C6DE8?
7C6DE8 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZU.
Where is Mode-S 7C6DE8 registered?
Mode-S code 7C6DE8 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DE8 broadcasting right now?
No active broadcast right now. Last signal was 44m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DE8, octal 37066750, decimal 8,154,600.
What flights does 7C6DE8 operate?
Mode-S 7C6DE8 has broadcast 20 distinct callsigns, including QFA146, QFA171, QFA162, QFA153, QFA941.