Apparatus

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sensors Mode-S transponder

7C6DD4

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DD4
Octal
37066724
Decimal
8,154,580
Country
AU
Tail
VH-VZA
Type
B738
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
354
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S 7C6DD4.

Country allocation

The ICAO 24-bit address 7C6DD4 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
QFA936 - 7 2026-06-28
QFA840 - 6 2026-07-07
QFA138 Qantas 6 2026-07-21
QFA941 - 5 2026-06-28
QFA731 - 5 2026-07-01
QFA942 Qantas 4 2026-06-28
QFA932 - 4 2026-06-23
QFA841 - 4 2026-07-08
QFA768 - 4 2026-07-14
QFA737 - 4 2026-07-02
QFA651 - 4 2026-07-11
QFA633 - 4 2026-07-04
QFA579 Qantas 4 2026-05-12
QFA410 - 4 2026-07-12
QFA149 Qantas 4 2026-07-20
QFA937 - 3 2026-06-27
QFA933 Qantas 3 2026-04-17
QFA886 Qantas 3 2026-05-14
QFA857 - 3 2026-06-23
QFA856 - 3 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA408 MEL → SYD Jul 26, 20:50 UTCJul 26, 22:05 UTC1h 15m
2026-07-26 QFA475 MEL → PER Jul 26, 08:25 UTCJul 26, 09:50 UTC1h 25m
2026-07-26 QFA180 NLK → SYD Jul 26, 05:40 UTCJul 26, 06:15 UTC35m
2026-07-26 QFA179 SYD → NLK Jul 26, 00:35 UTCJul 26, 01:00 UTC25m
2026-07-25 QFA124 AKL → BNE Jul 25, 19:35 UTCJul 25, 22:15 UTC2h 40m
2026-07-25 QFA123 BNE → AKL Jul 25, 06:25 UTCJul 25, 08:45 UTC2h 20m
2026-07-25 QFA144 AKL → SYD Jul 25, 01:50 UTCJul 25, 05:15 UTC3h 25m
2026-07-24 QFA141 SYD → AKL Jul 24, 21:15 UTCJul 24, 23:45 UTC2h 30m
2026-07-24 QFA136 CHC → SYD Jul 24, 04:40 UTCJul 24, 08:00 UTC3h 20m
2026-07-24 QFA137 SYD → CHC Jul 24, 02:45 UTCJul 24, 03:00 UTC15m
2026-07-24 QFA137 SYD → CHC Jul 24, 00:35 UTCJul 24, 01:05 UTC30m
2026-07-23 QFA124 AKL → BNE Jul 23, 19:20 UTCJul 23, 22:20 UTC3h 0m
2026-07-23 QFA123 BNE → AKL Jul 23, 06:55 UTCJul 23, 09:00 UTC2h 5m
2026-07-23 QFA527 BNE → SYD Jul 23, 03:45 UTCJul 23, 04:55 UTC1h 10m
2026-07-23 QFA516 SYD → BNE Jul 23, 01:35 UTCJul 23, 02:40 UTC1h 5m
2026-07-22 QFA509 BNE → SYD Jul 22, 23:05 UTCJul 23, 00:20 UTC1h 15m
2026-07-22 QFA92 NOU → SYD Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-21 QFA91 SYD → NOU Jul 21, 23:10 UTCJul 22, 00:05 UTC55m
2026-07-21 QFA138 CHC → SYD Jul 21, 20:30 UTCJul 21, 21:20 UTC50m
2026-07-21 QFA138 CHC → SYD Jul 21, 18:10 UTCJul 21, 18:25 UTC15m
2026-07-21 QFA135 BNE → CHC Jul 21, 11:50 UTCJul 21, 12:10 UTC20m
2026-07-21 QFA135 BNE → CHC Jul 21, 09:05 UTCJul 21, 09:55 UTC50m
2026-07-21 QFA184 BNE → BNE Jul 21, 02:00 UTCJul 21, 07:05 UTC5h 5m
2026-07-20 QFA120 - Jul 20, 18:25 UTCJul 20, 21:30 UTC3h 5m
2026-07-20 QFA149 SYD → AKL Jul 20, 12:15 UTCJul 20, 12:25 UTC10m
2026-07-20 QFA149 SYD → AKL Jul 20, 09:50 UTCJul 20, 10:25 UTC35m
2026-07-20 QFA164 WLG → SYD Jul 20, 04:20 UTCJul 20, 07:30 UTC3h 10m
2026-07-20 QFA161 SYD → WLG Jul 20, 00:10 UTCJul 20, 03:05 UTC2h 55m
2026-07-19 QFA138 CHC → SYD Jul 19, 20:25 UTCJul 19, 21:10 UTC45m
2026-07-19 QFA138 CHC → SYD Jul 19, 18:20 UTCJul 19, 18:30 UTC10m
2026-07-19 QFA169 MEL → CHC Jul 19, 12:10 UTCJul 19, 12:25 UTC15m
2026-07-19 QFA169 MEL → CHC Jul 19, 09:25 UTCJul 19, 09:55 UTC30m
2026-07-19 QFA154 - Jul 19, 02:00 UTCJul 19, 05:35 UTC3h 35m
2026-07-18 QFA151 - Jul 18, 23:40 UTCJul 19, 00:00 UTC20m
2026-07-18 QFA151 - Jul 18, 20:45 UTCJul 18, 21:15 UTC30m
2026-07-18 QFA447 SYD → MEL Jul 18, 03:40 UTCJul 18, 04:45 UTC1h 5m
2026-07-18 QFA438 MEL → SYD Jul 18, 01:25 UTCJul 18, 02:29 UTC1h 5m
2026-07-17 QFA421 - Jul 17, 23:00 UTCJul 18, 00:04 UTC1h 5m
2026-07-17 QFA470 MEL → SYD Jul 17, 07:30 UTCJul 17, 08:54 UTC1h 25m
2026-07-17 QFA686 ADL → MEL Jul 17, 04:59 UTCJul 17, 06:00 UTC1h 0m
2026-07-17 QFA683 MEL → ADL Jul 17, 03:05 UTCJul 17, 04:04 UTC1h 0m
2026-07-16 QFA760 PER → MEL Jul 16, 22:30 UTCJul 17, 01:25 UTC2h 55m
2026-07-16 QFA849 - Jul 16, 12:49 UTCJul 16, 13:40 UTC50m
2026-07-16 QFA836 - Jul 16, 02:15 UTCJul 16, 03:10 UTC55m
2026-07-16 QFA837 - Jul 16, 00:10 UTCJul 16, 00:40 UTC30m
2026-07-15 QFA47 - Jul 15, 12:15 UTCJul 15, 12:25 UTC10m
2026-07-15 QFA836 - Jul 15, 02:30 UTCJul 15, 03:25 UTC55m
2026-07-14 QFA425 SYD → MEL Jul 14, 23:20 UTCJul 15, 00:30 UTC1h 10m
2026-07-14 QFA406 MEL → SYD Jul 14, 20:40 UTCJul 14, 21:45 UTC1h 5m
2026-07-14 QFA768 PER → MEL Jul 14, 08:15 UTCJul 14, 11:30 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-VZA page for operator, model, and routing details .

Mode-S 7C6DD4 frequently asked

What is Mode-S code 7C6DD4?
7C6DD4 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZA.
Where is Mode-S 7C6DD4 registered?
Mode-S code 7C6DD4 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DD4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DD4, octal 37066724, decimal 8,154,580.
What flights does 7C6DD4 operate?
Mode-S 7C6DD4 has broadcast 20 distinct callsigns, including QFA936, QFA840, QFA138, QFA941, QFA731.