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 1d ago
Flights observed
156
Distinct callsigns
20
Country
AU
Last broadcast
1d 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
QFA172 Qantas 4 2026-05-23
QFA171 Qantas 4 2026-05-22
QFA161 Qantas 4 2026-05-07
QFA138 Qantas 4 2026-05-25
QFA841 Qantas 3 2026-04-18
QFA196 Qantas 3 2026-04-15
QFA163 Qantas 3 2026-05-07
QFA162 Qantas 3 2026-05-07
QFA151 Qantas 3 2026-05-23
QFA122 Qantas 3 2026-05-08
QFA121 Qantas 3 2026-05-08
QFA120 Qantas 3 2026-04-15
QFA101 Qantas 3 2026-05-28
QFA941 Qantas 2 2026-05-16
QFA936 Qantas 2 2026-05-16
QFA843 Qantas 2 2026-05-14
QFA842 Qantas 2 2026-05-14
QFA763 Qantas 2 2026-05-27
QFA686 Qantas 2 2026-05-21
QFA655 Qantas 2 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 QFA1042 SYD → BME May 29, 23:10 UTCMay 29, 23:40 UTC30m
2026-05-28 QFA101 SYD → NAN May 28, 23:20 UTCMay 29, 08:30 UTC9h 10m
2026-05-28 QFA476 PER → MEL May 28, 09:10 UTCMay 28, 10:20 UTC1h 10m
2026-05-28 QFA764 ADL → SYD May 28, 05:05 UTCMay 28, 08:10 UTC3h 5m
2026-05-27 QFA763 CBR → MEL May 27, 23:35 UTCMay 28, 03:50 UTC4h 15m
2026-05-27 QFA690 ADL → MEL May 27, 07:10 UTCMay 27, 08:30 UTC1h 20m
2026-05-27 QFA687 MEL → ADL May 27, 05:04 UTCMay 27, 05:59 UTC55m
2026-05-27 QFA682 ADL → MEL May 27, 02:59 UTCMay 27, 03:59 UTC1h 0m
2026-05-27 QFA679 MEL → ADL May 27, 00:49 UTCMay 27, 01:44 UTC55m
2026-05-26 QFA429 SYD → MEL May 26, 22:20 UTCMay 26, 23:49 UTC1h 30m
2026-05-25 QFA102 NAN → SYD May 25, 23:14 UTCMay 26, 08:45 UTC9h 30m
2026-05-25 QFA138 CHC → SYD May 25, 18:10 UTCMay 25, 21:45 UTC3h 34m
2026-05-25 QFA139 SYD → CHC May 25, 09:35 UTCMay 25, 12:00 UTC2h 25m
2026-05-25 QFA136 CHC → SYD May 25, 05:00 UTCMay 25, 08:15 UTC3h 15m
2026-05-25 QFA137 SYD → CHC May 25, 03:25 UTCMay 25, 03:45 UTC20m
2026-05-24 QFA124 AKL → BNE May 24, 20:30 UTCMay 24, 23:30 UTC3h 0m
2026-05-24 QFA123 BNE → AKL May 24, 06:20 UTCMay 24, 08:45 UTC2h 25m
2026-05-24 QFA144 AKL → SYD May 24, 01:35 UTCMay 24, 04:35 UTC3h 0m
2026-05-23 QFA151 MEL → AKL May 23, 23:40 UTCMay 24, 00:15 UTC35m
2026-05-23 QFA151 MEL → AKL May 23, 20:55 UTCMay 23, 21:25 UTC30m
2026-05-23 QFA172 WLG → MEL May 23, 02:35 UTCMay 23, 06:05 UTC3h 30m
2026-05-22 QFA171 MEL → WLG May 22, 22:10 UTCMay 23, 01:20 UTC3h 10m
2026-05-22 QFA045 MEL → DPS May 22, 08:10 UTCMay 22, 20:35 UTC12h 25m
2026-05-22 QFA172 WLG → MEL May 22, 02:45 UTCMay 22, 06:15 UTC3h 30m
2026-05-21 QFA171 MEL → WLG May 21, 22:15 UTCMay 22, 01:40 UTC3h 25m
2026-05-21 QFA694 ADL → MEL May 21, 09:15 UTCMay 21, 10:20 UTC1h 5m
2026-05-21 QFA691 MEL → ADL May 21, 07:10 UTCMay 21, 08:10 UTC1h 0m
2026-05-21 QFA686 ADL → MEL May 21, 05:00 UTCMay 21, 05:55 UTC55m
2026-05-21 QFA683 MEL → ADL May 21, 03:00 UTCMay 21, 04:00 UTC1h 0m
2026-05-21 QFA678 ADL → MEL May 21, 01:05 UTCMay 21, 02:00 UTC55m
2026-05-20 QFA675 MEL → ADL May 20, 23:00 UTCMay 20, 23:55 UTC55m
2026-05-20 QFA045 MEL → DPS May 20, 08:10 UTCMay 20, 20:55 UTC12h 45m
2026-05-20 QFA172 WLG → MEL May 20, 05:30 UTCMay 20, 06:00 UTC30m
2026-05-20 QFA172 WLG → MEL May 20, 02:35 UTCMay 20, 02:45 UTC10m
2026-05-20 QFA171 MEL → WLG May 20, 01:10 UTCMay 20, 01:25 UTC15m
2026-05-19 QFA171 MEL → WLG May 19, 22:05 UTCMay 19, 22:35 UTC30m
2026-05-19 QFA770 PER → MEL May 19, 09:20 UTCMay 19, 12:35 UTC3h 15m
2026-05-19 QFA767 BNE → PER May 19, 03:25 UTCMay 19, 07:15 UTC3h 50m
2026-05-18 QFA760 PER → MEL May 18, 22:25 UTCMay 19, 01:40 UTC3h 15m
2026-05-18 QFA857 CBR → PER May 18, 10:10 UTCMay 18, 14:25 UTC4h 15m
2026-05-18 QFA856 MEL → CBR May 18, 05:45 UTCMay 18, 09:15 UTC3h 30m
2026-05-18 QFA765 SYD → ADL May 18, 00:35 UTCMay 18, 04:15 UTC3h 40m
2026-05-17 QFA415 SYD → MEL May 17, 22:05 UTCMay 17, 23:30 UTC1h 25m
2026-05-17 QFA484 MEL → SYD May 17, 09:00 UTCMay 17, 10:10 UTC1h 10m
2026-05-17 QFA629 BNE → MEL May 17, 05:35 UTCMay 17, 07:40 UTC2h 5m
2026-05-16 QFA934 PER → BNE May 16, 23:55 UTCMay 17, 04:05 UTC4h 10m
2026-05-16 QFA941 BNE → PER May 16, 08:41 UTCMay 16, 13:35 UTC4h 55m
2026-05-16 QFA936 PER → BNE May 16, 02:45 UTCMay 16, 06:45 UTC4h 1m
2026-05-15 QFA769 MEL → PER May 15, 04:50 UTCMay 15, 08:40 UTC3h 50m
2026-05-15 QFA441 SYD → MEL May 15, 02:10 UTCMay 15, 03:15 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 1d 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 QFA172, QFA171, QFA161, QFA138, QFA841.