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
Broadcasting now · callsign QFA841 · 14,475 ft
Flights observed
327
Distinct callsigns
20
Country
AU
Last broadcast
8h ago

Current position

7C6DE8 is currently broadcasting. Map zoomed to live position.

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
QFA857 - 5 2026-06-27
QFA171 Qantas 5 2026-04-27
QFA162 Qantas 5 2026-05-14
QFA153 Qantas 5 2026-05-12
QFA147 Qantas 5 2026-06-07
QFA941 Qantas 4 2026-05-24
QFA936 Qantas 4 2026-05-24
QFA887 - 4 2026-06-26
QFA856 - 4 2026-06-27
QFA433 - 4 2026-07-09
QFA185 - 4 2026-07-12
QFA172 Qantas 4 2026-04-28
QFA163 Qantas 4 2026-05-14
QFA155 - 4 2026-07-09
QFA152 Qantas 4 2026-06-07
QFA884 - 3 2026-07-05
QFA882 - 3 2026-06-25
QFA696 - 3 2026-07-03
QFA647 - 3 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QFA840 - Jul 13, 22:25 UTCJul 13, 22:55 UTC30m
2026-07-13 QFA843 - Jul 13, 19:45 UTCJul 13, 20:30 UTC45m
2026-07-13 QFA826 - Jul 13, 11:20 UTCJul 13, 11:55 UTC35m
2026-07-13 QFA126 - Jul 13, 03:40 UTCJul 13, 07:05 UTC3h 25m
2026-07-13 QFA119 - Jul 13, 00:45 UTCJul 13, 01:05 UTC20m
2026-07-12 QFA119 - Jul 12, 22:30 UTCJul 12, 23:10 UTC40m
2026-07-12 QFA186 - Jul 12, 05:35 UTCJul 12, 09:00 UTC3h 25m
2026-07-12 QFA185 - Jul 12, 03:15 UTCJul 12, 03:30 UTC15m
2026-07-12 QFA185 - Jul 12, 00:35 UTCJul 12, 01:20 UTC45m
2026-07-11 QFA186 - Jul 11, 07:00 UTCJul 11, 10:15 UTC3h 15m
2026-07-11 QFA185 - Jul 11, 02:30 UTCJul 11, 05:31 UTC3h 0m
2026-07-10 QFA628 MEL → BNE Jul 10, 08:15 UTCJul 10, 10:05 UTC1h 50m
2026-07-10 QFA451 SYD → MEL Jul 10, 04:55 UTCJul 10, 05:55 UTC1h 0m
2026-07-09 QFA142 AKL → SYD Jul 9, 20:40 UTCJul 10, 00:10 UTC3h 30m
2026-07-09 QFA155 MEL → AKL Jul 9, 04:00 UTCJul 9, 07:15 UTC3h 15m
2026-07-09 QFA433 SYD → MEL Jul 9, 01:15 UTCJul 9, 02:15 UTC1h 0m
2026-07-08 QFA414 MEL → SYD Jul 8, 22:30 UTCJul 8, 23:40 UTC1h 10m
2026-07-08 QFA158 - Jul 8, 08:40 UTCJul 8, 12:20 UTC3h 40m
2026-07-08 QFA155 MEL → AKL Jul 8, 03:45 UTCJul 8, 06:55 UTC3h 10m
2026-07-08 QFA678 ADL → MEL Jul 8, 01:05 UTCJul 8, 02:00 UTC55m
2026-07-07 QFA675 MEL → ADL Jul 7, 23:05 UTCJul 8, 00:05 UTC1h 0m
2026-07-07 QFA401 SYD → MEL Jul 7, 20:10 UTCJul 7, 21:20 UTC1h 10m
2026-07-07 QFA650 PER → SYD Jul 7, 06:55 UTCJul 7, 10:40 UTC3h 45m
2026-07-07 QFA645 SYD → PER Jul 7, 01:15 UTCJul 7, 05:35 UTC4h 20m
2026-07-06 QFA416 MEL → SYD Jul 6, 22:10 UTCJul 6, 23:25 UTC1h 15m
2026-07-06 QFA479 SYD → MEL Jul 6, 08:40 UTCJul 6, 09:45 UTC1h 5m
2026-07-06 QFA729 SYD → SYD Jul 6, 00:05 UTCJul 6, 07:05 UTC7h 0m
2026-07-05 QFA589 - Jul 5, 21:15 UTCJul 5, 22:30 UTC1h 15m
2026-07-05 QFA598 - Jul 5, 09:45 UTCJul 5, 10:40 UTC55m
2026-07-05 QFA470 MEL → SYD Jul 5, 07:25 UTCJul 5, 08:40 UTC1h 15m
2026-07-05 QFA686 ADL → MEL Jul 5, 05:15 UTCJul 5, 06:15 UTC1h 0m
2026-07-05 QFA884 PER → ADL Jul 5, 01:20 UTCJul 5, 03:45 UTC2h 25m
2026-07-04 QFA937 BNE → PER Jul 4, 03:35 UTCJul 4, 08:35 UTC5h 0m
2026-07-03 QFA610 MEL → BNE Jul 3, 23:30 UTCJul 4, 01:20 UTC1h 50m
2026-07-03 QFA696 ADL → MEL Jul 3, 10:25 UTCJul 3, 11:25 UTC1h 0m
2026-07-03 QFA743 SYD → ADL Jul 3, 07:35 UTCJul 3, 09:25 UTC1h 50m
2026-07-03 QFA444 MEL → SYD Jul 3, 04:50 UTCJul 3, 06:00 UTC1h 10m
2026-07-03 QFA433 SYD → MEL Jul 3, 01:00 UTCJul 3, 02:15 UTC1h 15m
2026-07-02 QFA478 MEL → SYD Jul 2, 08:25 UTCJul 2, 09:30 UTC1h 5m
2026-07-02 QFA453 - Jul 2, 05:20 UTCJul 2, 06:30 UTC1h 10m
2026-07-02 QFA523 BNE → SYD Jul 2, 01:55 UTCJul 2, 03:10 UTC1h 15m
2026-07-01 QFA512 - Jul 1, 23:50 UTCJul 2, 00:55 UTC1h 5m
2026-07-01 QFA646 PER → SYD Jul 1, 02:20 UTCJul 1, 06:10 UTC3h 50m
2026-06-30 QFA641 SYD → PER Jun 30, 20:15 UTCJul 1, 01:05 UTC4h 50m
2026-06-30 QFA545 BNE → SYD Jun 30, 07:45 UTCJun 30, 09:15 UTC1h 30m
2026-06-30 QFA536 SYD → BNE Jun 30, 05:30 UTCJun 30, 06:40 UTC1h 10m
2026-06-29 QFA124 AKL → BNE Jun 29, 21:24 UTCJun 30, 01:30 UTC4h 6m
2026-06-29 QFA123 - Jun 29, 06:40 UTCJun 29, 09:10 UTC2h 30m
2026-06-29 QFA144 - Jun 29, 02:00 UTCJun 29, 05:04 UTC3h 5m
2026-06-28 QFA151 MEL → AKL Jun 28, 20:39 UTCJun 28, 23:54 UTC3h 15m

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?
Yes. Mode-S 7C6DE8 is currently airborne.
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, QFA857, QFA171, QFA162, QFA153.