Apparatus

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sensors Mode-S transponder

7C6DDD

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DDD
Octal
37066735
Decimal
8,154,589
Country
AU
Tail
VH-VZJ
Type
B738
No current signal · last broadcast 2h ago
Flights observed
316
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7C6DDD.

Country allocation

The ICAO 24-bit address 7C6DDD 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
QFA133 - 8 2026-07-05
QFA120 - 8 2026-07-11
QFA138 - 6 2026-06-29
QFA135 - 6 2026-07-01
QFA134 - 6 2026-07-05
QFA170 - 5 2026-06-21
QFA941 Qantas 4 2026-06-04
QFA196 Qantas 4 2026-06-05
QFA177 Qantas 4 2026-06-19
QFA172 Qantas 4 2026-05-23
QFA171 Qantas 4 2026-05-22
QFA161 Qantas 4 2026-05-07
QFA125 - 4 2026-07-05
QFA122 - 4 2026-06-18
QFA121 - 4 2026-06-18
QFA841 Qantas 3 2026-04-18
QFA836 - 3 2026-06-15
QFA765 - 3 2026-07-09
QFA613 - 3 2026-06-24
QFA210 - 3 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 QFA938 - Jul 15, 05:15 UTCJul 15, 05:40 UTC25m
2026-07-14 QFA935 BNE → PER Jul 14, 22:50 UTCJul 15, 04:10 UTC5h 20m
2026-07-14 QFA500 SYD → BNE Jul 14, 20:20 UTCJul 14, 21:25 UTC1h 5m
2026-07-14 QFA148 - Jul 14, 06:30 UTCJul 14, 09:40 UTC3h 10m
2026-07-14 QFA145 SYD → AKL Jul 14, 02:15 UTCJul 14, 04:50 UTC2h 35m
2026-07-13 QFA418 MEL → SYD Jul 13, 22:15 UTCJul 13, 23:15 UTC1h 0m
2026-07-13 QFA704 MEL → MEL Jul 13, 03:40 UTCJul 13, 10:40 UTC7h 0m
2026-07-12 QFA760 PER → MEL Jul 12, 23:10 UTCJul 13, 02:15 UTC3h 5m
2026-07-12 QFA769 MEL → PER Jul 12, 05:01 UTCJul 12, 08:50 UTC3h 50m
2026-07-12 QFA619 BNE → MEL Jul 12, 00:10 UTCJul 12, 02:30 UTC2h 20m
2026-07-11 QFA120 - Jul 11, 18:40 UTCJul 11, 21:50 UTC3h 10m
2026-07-11 QFA209 - Jul 11, 04:20 UTCJul 11, 06:55 UTC2h 35m
2026-07-11 QFA210 - Jul 11, 01:35 UTCJul 11, 02:20 UTC45m
2026-07-10 QFA210 - Jul 10, 23:20 UTCJul 10, 23:30 UTC10m
2026-07-10 QFA149 SYD → AKL Jul 10, 10:05 UTCJul 10, 12:40 UTC2h 35m
2026-07-10 QFA595 - Jul 10, 06:15 UTCJul 10, 07:30 UTC1h 15m
2026-07-10 QFA594 SYD → OOL Jul 10, 04:10 UTCJul 10, 05:10 UTC1h 0m
2026-07-10 QFA593 - Jul 10, 01:50 UTCJul 10, 02:50 UTC1h 0m
2026-07-09 QFA592 - Jul 9, 23:45 UTCJul 10, 00:50 UTC1h 5m
2026-07-09 QFA408 MEL → SYD Jul 9, 20:55 UTCJul 9, 22:30 UTC1h 35m
2026-07-09 QFA694 ADL → MEL Jul 9, 09:10 UTCJul 9, 10:10 UTC1h 0m
2026-07-09 QFA886 PER → ADL Jul 9, 05:20 UTCJul 9, 07:50 UTC2h 30m
2026-07-09 QFA765 MEL → PER Jul 9, 00:15 UTCJul 9, 04:15 UTC4h 0m
2026-07-08 QFA415 SYD → MEL Jul 8, 21:50 UTCJul 8, 22:55 UTC1h 5m
2026-07-08 QFA180 - Jul 8, 05:15 UTCJul 8, 05:50 UTC35m
2026-07-08 QFA179 - Jul 8, 00:15 UTCJul 8, 00:40 UTC25m
2026-07-07 QFA597 - Jul 7, 08:00 UTCJul 7, 09:10 UTC1h 10m
2026-07-07 QFA596 - Jul 7, 06:05 UTCJul 7, 07:00 UTC55m
2026-07-07 QFA740 ADL → SYD Jul 7, 03:30 UTCJul 7, 05:00 UTC1h 30m
2026-07-07 QFA735 SYD → ADL Jul 7, 00:40 UTCJul 7, 02:25 UTC1h 45m
2026-07-06 QFA507 BNE → SYD Jul 6, 21:50 UTCJul 6, 23:05 UTC1h 15m
2026-07-06 QFA203 SYD → BNE Jul 6, 00:20 UTCJul 6, 07:50 UTC7h 30m
2026-07-05 QFA140 AKL → SYD Jul 5, 18:35 UTCJul 5, 21:40 UTC3h 5m
2026-07-05 QFA125 BNE → AKL Jul 5, 09:00 UTCJul 5, 11:35 UTC2h 35m
2026-07-05 QFA134 - Jul 5, 06:35 UTCJul 5, 07:30 UTC55m
2026-07-05 QFA134 - Jul 5, 04:05 UTCJul 5, 04:15 UTC10m
2026-07-05 QFA133 - Jul 5, 02:20 UTCJul 5, 02:35 UTC15m
2026-07-04 QFA133 - Jul 4, 23:40 UTCJul 5, 00:20 UTC40m
2026-07-04 QFA120 - Jul 4, 18:45 UTCJul 4, 22:10 UTC3h 25m
2026-07-04 QFA209 - Jul 4, 04:25 UTCJul 4, 06:55 UTC2h 30m
2026-07-03 QFA210 - Jul 3, 23:35 UTCJul 4, 03:05 UTC3h 30m
2026-07-03 QFA117 BNE → AKL Jul 3, 04:30 UTCJul 3, 07:05 UTC2h 35m
2026-07-02 QFA118 - Jul 2, 23:30 UTCJul 3, 03:00 UTC3h 30m
2026-07-02 QFA144 - Jul 2, 06:35 UTCJul 2, 21:55 UTC15h 20m
2026-07-02 QFA117 - Jul 2, 02:15 UTCJul 2, 04:55 UTC2h 40m
2026-07-01 QFA132 - Jul 1, 21:00 UTCJul 1, 22:15 UTC1h 15m
2026-07-01 QFA132 - Jul 1, 18:25 UTCJul 1, 18:35 UTC10m
2026-07-01 QFA135 - Jul 1, 12:00 UTCJul 1, 12:15 UTC15m
2026-07-01 QFA135 - Jul 1, 09:15 UTCJul 1, 10:00 UTC45m
2026-07-01 QFA538 SYD → BNE Jul 1, 06:05 UTCJul 1, 07:10 UTC1h 5m

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

Mode-S 7C6DDD frequently asked

What is Mode-S code 7C6DDD?
7C6DDD is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZJ.
Where is Mode-S 7C6DDD registered?
Mode-S code 7C6DDD is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DDD broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DDD, octal 37066735, decimal 8,154,589.
What flights does 7C6DDD operate?
Mode-S 7C6DDD has broadcast 20 distinct callsigns, including QFA133, QFA120, QFA138, QFA135, QFA134.