Apparatus

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sensors Mode-S transponder

7C6DDF

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DDF
Octal
37066737
Decimal
8,154,591
Country
AU
Tail
VH-VZL
Type
B738
No current signal · last broadcast 1d ago
Flights observed
172
Distinct callsigns
20
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C6DDF.

Country allocation

The ICAO 24-bit address 7C6DDF 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
QFA933 Qantas 6 2026-05-24
QFA135 Qantas 5 2026-04-22
QFA132 Qantas 5 2026-04-22
QFA936 Qantas 4 2026-05-25
QFA156 Qantas 4 2026-05-03
QFA134 Qantas 4 2026-04-22
QFA840 Qantas 3 2026-05-17
QFA632 Qantas 3 2026-05-24
QFA58 Qantas 3 2026-05-13
QFA509 Qantas 3 2026-05-25
QFA410 Qantas 3 2026-05-01
QFA185 Qantas 3 2026-04-15
QFA143 Qantas 3 2026-05-02
QFA140 Qantas 3 2026-04-16
QFA138 - 3 2026-04-17
QFA133 Qantas 3 2026-04-21
QFA841 Qantas 2 2026-05-18
QFA744 Qantas 2 2026-05-28
QFA739 Qantas 2 2026-05-28
QFA733 Qantas 2 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 QFA628 MEL → BNE May 29, 07:40 UTCMay 29, 09:35 UTC1h 55m
2026-05-29 QFA455 SYD → MEL May 29, 05:20 UTCMay 29, 06:30 UTC1h 10m
2026-05-29 QFA529 BNE → SYD May 29, 02:50 UTCMay 29, 04:05 UTC1h 15m
2026-05-29 QFA518 SYD → BNE May 29, 00:40 UTCMay 29, 01:50 UTC1h 10m
2026-05-28 QFA416 MEL → SYD May 28, 21:55 UTCMay 28, 23:15 UTC1h 20m
2026-05-28 QFA493 SYD → MEL May 28, 10:50 UTCMay 28, 11:50 UTC1h 0m
2026-05-28 QFA744 ADL → SYD May 28, 07:45 UTCMay 28, 09:25 UTC1h 40m
2026-05-28 QFA739 SYD → ADL May 28, 05:00 UTCMay 28, 06:40 UTC1h 40m
2026-05-28 QFA444 MEL → SYD May 28, 02:55 UTCMay 28, 04:00 UTC1h 5m
2026-05-27 QFA615 BNE → MEL May 27, 23:50 UTCMay 28, 01:45 UTC1h 55m
2026-05-27 QFA600 MEL → BNE May 27, 20:05 UTCMay 27, 22:20 UTC2h 15m
2026-05-27 QFA433 SYD → MEL May 27, 01:59 UTCMay 27, 03:04 UTC1h 5m
2026-05-26 QFA732 ADL → SYD May 26, 22:50 UTCMay 27, 00:39 UTC1h 50m
2026-05-26 QFA888 PER → ADL May 26, 09:29 UTCMay 26, 12:00 UTC2h 30m
2026-05-26 QFA645 SYD → PER May 26, 01:24 UTCMay 26, 05:59 UTC4h 35m
2026-05-25 QFA509 BNE → SYD May 25, 22:10 UTCMay 25, 23:14 UTC1h 5m
2026-05-25 QFA936 PER → BNE May 25, 02:50 UTCMay 25, 07:10 UTC4h 20m
2026-05-24 QFA933 BNE → PER May 24, 20:10 UTCMay 24, 21:10 UTC1h 0m
2026-05-24 QFA632 MEL → BNE May 24, 09:05 UTCMay 24, 10:55 UTC1h 50m
2026-05-24 QFA154 AKL → MEL May 24, 01:50 UTCMay 24, 05:25 UTC3h 35m
2026-05-23 QFA141 SYD → AKL May 23, 21:35 UTCMay 24, 00:20 UTC2h 45m
2026-05-23 QFA744 ADL → SYD May 23, 07:50 UTCMay 23, 09:25 UTC1h 35m
2026-05-23 QFA739 SYD → ADL May 23, 05:00 UTCMay 23, 06:50 UTC1h 50m
2026-05-23 QFA593 ADL → PER May 23, 01:30 UTCMay 23, 02:35 UTC1h 5m
2026-05-22 QFA592 PER → ADL May 22, 23:30 UTCMay 23, 00:30 UTC1h 0m
2026-05-22 QFA180 NLK → SYD May 22, 00:05 UTCMay 22, 05:45 UTC5h 40m
2026-05-21 QFA136 CHC → SYD May 21, 04:50 UTCMay 21, 07:50 UTC3h 0m
2026-05-21 QFA137 SYD → CHC May 21, 00:40 UTCMay 21, 03:25 UTC2h 45m
2026-05-19 QFA102 NAN → SYD May 19, 23:15 UTCMay 20, 08:15 UTC9h 1m
2026-05-19 QFA444 MEL → SYD May 19, 02:50 UTCMay 19, 03:55 UTC1h 5m
2026-05-19 QFA429 SYD → MEL May 19, 00:10 UTCMay 19, 01:15 UTC1h 5m
2026-05-18 QFA589 BNE → PER May 18, 21:20 UTCMay 18, 22:30 UTC1h 10m
2026-05-18 QFA598 PER → BNE May 18, 09:35 UTCMay 18, 10:40 UTC1h 5m
2026-05-18 QFA841 DRW → SYD May 18, 07:05 UTCMay 18, 07:45 UTC40m
2026-05-17 QFA840 SYD → DRW May 17, 22:25 UTCMay 17, 23:25 UTC1h 0m
2026-05-17 QFA486 MEL → SYD May 17, 09:25 UTCMay 17, 10:30 UTC1h 5m
2026-05-17 QFA766 ADL → SYD May 17, 04:35 UTCMay 17, 07:55 UTC3h 20m
2026-05-16 QFA763 CBR → MEL May 16, 23:30 UTCMay 17, 03:00 UTC3h 30m
2026-05-16 QFA696 ADL → MEL May 16, 11:05 UTCMay 16, 12:01 UTC55m
2026-05-16 QFA693 MEL → ADL May 16, 08:20 UTCMay 16, 09:21 UTC1h 0m
2026-05-16 QFA178 ZQN → MEL May 16, 01:40 UTCMay 16, 04:35 UTC2h 55m
2026-05-15 QFA177 MEL → ZQN May 15, 21:35 UTCMay 16, 00:15 UTC2h 40m
2026-05-15 QFA764 ADL → SYD May 15, 02:50 UTCMay 15, 06:10 UTC3h 20m
2026-05-14 QFA933 BNE → PER May 14, 20:10 UTCMay 15, 01:15 UTC5h 5m
2026-05-13 QFA58 POM → BNE May 13, 23:50 UTCMay 14, 06:40 UTC6h 50m
2026-05-13 QFA632 MEL → BNE May 13, 09:10 UTCMay 13, 11:05 UTC1h 55m
2026-05-13 QFA459 SYD → MEL May 13, 05:50 UTCMay 13, 06:45 UTC55m
2026-05-13 QFA448 MEL → SYD May 13, 03:50 UTCMay 13, 04:55 UTC1h 5m
2026-05-13 QFA437 SYD → MEL May 13, 01:15 UTCMay 13, 02:15 UTC1h 0m
2026-05-12 QFA420 MEL → SYD May 12, 22:35 UTCMay 12, 23:45 UTC1h 10m

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

Mode-S 7C6DDF frequently asked

What is Mode-S code 7C6DDF?
7C6DDF is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZL.
Where is Mode-S 7C6DDF registered?
Mode-S code 7C6DDF is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DDF 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 7C6DDF, octal 37066737, decimal 8,154,591.
What flights does 7C6DDF operate?
Mode-S 7C6DDF has broadcast 20 distinct callsigns, including QFA933, QFA135, QFA132, QFA936, QFA156.