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 6h ago
Flights observed
305
Distinct callsigns
20
Country
AU
Last broadcast
6h ago

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
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
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
QFA777 - 3 2026-07-14
QFA744 Qantas 3 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QFA768 PER → MEL Jul 14, 08:15 UTCJul 14, 11:30 UTC3h 15m
2026-07-14 QFA777 MEL → PER Jul 14, 02:35 UTCJul 14, 06:10 UTC3h 35m
2026-07-14 QFA837 - Jul 14, 00:05 UTCJul 14, 00:45 UTC40m
2026-07-13 QFA48 - Jul 13, 14:20 UTCJul 13, 14:30 UTC10m
2026-07-13 QFA47 - Jul 13, 12:15 UTCJul 13, 12:25 UTC10m
2026-07-13 QFA836 - Jul 13, 02:55 UTCJul 13, 03:55 UTC1h 0m
2026-07-13 QFA429 SYD → MEL Jul 13, 00:05 UTCJul 13, 01:30 UTC1h 25m
2026-07-12 QFA410 MEL → SYD Jul 12, 21:05 UTCJul 12, 22:10 UTC1h 5m
2026-07-12 QFA770 PER → MEL Jul 12, 09:10 UTCJul 12, 12:20 UTC3h 10m
2026-07-12 QFA78 - Jul 12, 02:45 UTCJul 12, 07:20 UTC4h 35m
2026-07-11 QFA77 - Jul 11, 15:40 UTCJul 11, 20:50 UTC5h 10m
2026-07-11 QFA651 SYD → PER Jul 11, 06:35 UTCJul 11, 11:15 UTC4h 40m
2026-07-11 QFA644 PER → SYD Jul 11, 01:20 UTCJul 11, 05:05 UTC3h 45m
2026-07-10 QFA769 MEL → PER Jul 10, 05:00 UTCJul 10, 08:45 UTC3h 45m
2026-07-10 QFA762 PER → MEL Jul 10, 00:25 UTCJul 10, 03:30 UTC3h 5m
2026-07-09 QFA651 SYD → PER Jul 9, 06:35 UTCJul 9, 11:20 UTC4h 45m
2026-07-09 QFA450 MEL → SYD Jul 9, 04:15 UTCJul 9, 05:25 UTC1h 10m
2026-07-09 QFA435 SYD → MEL Jul 9, 01:25 UTCJul 9, 02:25 UTC1h 0m
2026-07-08 QFA841 - Jul 8, 06:30 UTCJul 8, 07:10 UTC40m
2026-07-07 QFA840 - Jul 7, 22:15 UTCJul 7, 23:10 UTC55m
2026-07-07 QFA841 - Jul 7, 06:20 UTCJul 7, 07:20 UTC1h 0m
2026-07-07 QFA840 - Jul 7, 02:35 UTCJul 7, 02:45 UTC10m
2026-07-06 QFA840 - Jul 6, 22:20 UTCJul 6, 23:15 UTC55m
2026-07-06 QFA650 PER → SYD Jul 6, 06:50 UTCJul 6, 10:45 UTC3h 55m
2026-07-06 QFA645 SYD → PER Jul 6, 01:00 UTCJul 6, 05:20 UTC4h 20m
2026-07-05 QFA410 MEL → SYD Jul 5, 21:20 UTCJul 5, 22:50 UTC1h 30m
2026-07-05 QFA694 ADL → MEL Jul 5, 09:00 UTCJul 5, 10:00 UTC1h 0m
2026-07-05 QFA691 MEL → ADL Jul 5, 07:05 UTCJul 5, 08:00 UTC55m
2026-07-04 QFA702 MEL → MEL Jul 4, 22:40 UTCJul 5, 05:45 UTC7h 5m
2026-07-04 QFA633 BNE → MEL Jul 4, 07:30 UTCJul 4, 09:30 UTC2h 0m
2026-07-04 QFA616 MEL → BNE Jul 4, 02:45 UTCJul 4, 04:30 UTC1h 45m
2026-07-03 QFA615 BNE → MEL Jul 3, 23:25 UTCJul 4, 01:40 UTC2h 15m
2026-07-03 QFA546 SYD → BNE Jul 3, 08:00 UTCJul 3, 09:20 UTC1h 20m
2026-07-03 QFA790 SYD → SYD Jul 3, 00:20 UTCJul 3, 06:50 UTC6h 30m
2026-07-02 QFA406 MEL → SYD Jul 2, 20:40 UTCJul 2, 21:45 UTC1h 5m
2026-07-02 QFA485 SYD → MEL Jul 2, 09:25 UTCJul 2, 10:40 UTC1h 15m
2026-07-02 QFA742 - Jul 2, 05:25 UTCJul 2, 06:45 UTC1h 20m
2026-07-02 QFA737 - Jul 2, 04:00 UTCJul 2, 04:35 UTC35m
2026-07-02 QFA737 - Jul 2, 02:35 UTCJul 2, 03:15 UTC40m
2026-07-01 QFA736 ADL → SYD Jul 1, 23:55 UTCJul 2, 01:20 UTC1h 25m
2026-07-01 QFA731 SYD → ADL Jul 1, 20:45 UTCJul 1, 22:50 UTC2h 5m
2026-07-01 QFA650 PER → SYD Jul 1, 08:15 UTCJul 1, 11:55 UTC3h 40m
2026-07-01 QFA645 SYD → PER Jul 1, 02:30 UTCJul 1, 07:15 UTC4h 45m
2026-06-30 QFA446 MEL → SYD Jun 30, 03:25 UTCJun 30, 04:30 UTC1h 5m
2026-06-29 QFA760 PER → MEL Jun 29, 22:35 UTCJun 30, 01:45 UTC3h 11m
2026-06-29 QFA651 SYD → PER Jun 29, 06:34 UTCJun 29, 11:25 UTC4h 50m
2026-06-29 QFA450 MEL → SYD Jun 29, 04:20 UTCJun 29, 05:20 UTC1h 0m
2026-06-29 QFA439 SYD → MEL Jun 29, 02:05 UTCJun 29, 03:14 UTC1h 10m
2026-06-28 QFA509 BNE → SYD Jun 28, 22:15 UTCJun 28, 23:29 UTC1h 15m
2026-06-28 QFA942 PER → BNE Jun 28, 14:59 UTCJun 28, 18:55 UTC3h 55m

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 6h ago.
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, QFA941, QFA731, QFA942.