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
Transponder active on ground
Flights observed
324
Distinct callsigns
20
Country
AU
Last broadcast
1h 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
QFA138 - 10 2026-07-12
QFA933 Qantas 6 2026-05-24
QFA156 - 6 2026-06-18
QFA135 - 6 2026-07-08
QFA169 - 5 2026-06-23
QFA143 - 5 2026-07-13
QFA140 - 5 2026-07-13
QFA134 Qantas 5 2026-06-08
QFA132 Qantas 5 2026-04-22
QFA936 Qantas 4 2026-05-25
QFA733 Qantas 4 2026-06-04
QFA157 Qantas 4 2026-06-07
QFA133 Qantas 4 2026-06-07
QFA125 - 4 2026-07-14
QFA120 - 4 2026-07-14
QFA888 Qantas 3 2026-06-03
QFA840 Qantas 3 2026-05-17
QFA836 - 3 2026-07-02
QFA744 Qantas 3 2026-06-10
QFA739 Qantas 3 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QFA120 - Jul 14, 18:40 UTCJul 14, 22:10 UTC3h 30m
2026-07-14 QFA125 BNE → AKL Jul 14, 09:05 UTCJul 14, 11:50 UTC2h 45m
2026-07-14 QFA126 - Jul 14, 04:05 UTCJul 14, 07:20 UTC3h 15m
2026-07-13 QFA143 - Jul 13, 23:35 UTCJul 14, 02:05 UTC2h 30m
2026-07-13 QFA140 - Jul 13, 18:15 UTCJul 13, 21:35 UTC3h 20m
2026-07-13 QFA125 - Jul 13, 09:40 UTCJul 13, 12:15 UTC2h 35m
2026-07-13 QFA203 SYD → BNE Jul 13, 00:40 UTCJul 13, 08:10 UTC7h 30m
2026-07-12 QFA138 - Jul 12, 18:15 UTCJul 12, 21:20 UTC3h 5m
2026-07-12 QFA139 - Jul 12, 12:45 UTCJul 12, 13:01 UTC15m
2026-07-12 QFA139 - Jul 12, 10:30 UTCJul 12, 10:55 UTC25m
2026-07-12 QFA136 - Jul 12, 05:35 UTCJul 12, 08:55 UTC3h 20m
2026-07-12 QFA137 - Jul 12, 04:01 UTCJul 12, 04:20 UTC20m
2026-07-12 QFA137 - Jul 12, 01:40 UTCJul 12, 02:15 UTC35m
2026-07-11 QFA144 - Jul 11, 01:45 UTCJul 11, 04:45 UTC3h 0m
2026-07-10 QFA141 - Jul 10, 21:35 UTCJul 11, 00:20 UTC2h 45m
2026-07-09 QFA102 - Jul 9, 23:10 UTCJul 10, 08:55 UTC9h 45m
2026-07-09 QFA102 SYD → SYD Jul 9, 00:30 UTCJul 9, 09:55 UTC9h 25m
2026-07-08 QFA138 - Jul 8, 20:25 UTCJul 8, 21:15 UTC50m
2026-07-08 QFA138 - Jul 8, 18:10 UTCJul 8, 18:20 UTC10m
2026-07-08 QFA135 - Jul 8, 09:15 UTCJul 8, 12:20 UTC3h 5m
2026-07-08 QFA825 - Jul 8, 06:05 UTCJul 8, 06:40 UTC35m
2026-07-08 QFA825 - Jul 8, 03:25 UTCJul 8, 03:35 UTC10m
2026-07-07 QFA824 - Jul 7, 22:30 UTCJul 7, 23:00 UTC30m
2026-07-07 QFA540 SYD → BNE Jul 7, 07:15 UTCJul 7, 08:20 UTC1h 5m
2026-07-07 QFA450 MEL → SYD Jul 7, 05:10 UTCJul 7, 06:10 UTC1h 0m
2026-07-07 QFA437 SYD → MEL Jul 7, 02:35 UTCJul 7, 04:00 UTC1h 25m
2026-07-06 QFA418 MEL → SYD Jul 6, 22:40 UTCJul 6, 23:40 UTC1h 0m
2026-07-06 QFA158 AKL → MEL Jul 6, 08:50 UTCJul 6, 12:20 UTC3h 30m
2026-07-06 QFA155 MEL → AKL Jul 6, 03:55 UTCJul 6, 07:20 UTC3h 25m
2026-07-06 QFA433 SYD → MEL Jul 6, 00:55 UTCJul 6, 02:00 UTC1h 5m
2026-07-05 QFA414 MEL → SYD Jul 5, 22:20 UTCJul 5, 23:30 UTC1h 10m
2026-07-05 QFA772 PER → MEL Jul 5, 10:15 UTCJul 5, 13:20 UTC3h 5m
2026-07-05 QFA769 MEL → PER Jul 5, 04:55 UTCJul 5, 08:30 UTC3h 35m
2026-07-05 QFA762 PER → MEL Jul 5, 00:20 UTCJul 5, 03:35 UTC3h 15m
2026-07-04 QFA857 - Jul 4, 05:25 UTCJul 4, 09:20 UTC3h 55m
2026-07-04 QFA856 - Jul 4, 00:35 UTCJul 4, 04:15 UTC3h 40m
2026-07-03 QFA891 - Jul 3, 09:40 UTCJul 3, 12:30 UTC2h 50m
2026-07-03 QFA886 PER → ADL Jul 3, 06:15 UTCJul 3, 08:55 UTC2h 40m
2026-07-03 QFA887 ADL → PER Jul 3, 01:30 UTCJul 3, 04:20 UTC2h 50m
2026-07-02 QFA882 PER → ADL Jul 2, 21:55 UTCJul 3, 00:30 UTC2h 35m
2026-07-02 QFA849 - Jul 2, 11:30 UTCJul 2, 12:00 UTC30m
2026-07-02 QFA836 - Jul 2, 02:05 UTCJul 2, 02:40 UTC35m
2026-07-01 QFA837 - Jul 1, 23:50 UTCJul 2, 00:25 UTC35m
2026-07-01 QFA47 - Jul 1, 12:45 UTCJul 1, 12:55 UTC10m
2026-07-01 QFA836 - Jul 1, 02:15 UTCJul 1, 02:50 UTC35m
2026-06-30 QFA674 ADL → MEL Jun 30, 22:40 UTCJun 30, 23:50 UTC1h 10m
2026-06-30 QFA671 MEL → ADL Jun 30, 20:30 UTCJun 30, 21:35 UTC1h 5m
2026-06-30 QFA631 BNE → MEL Jun 30, 06:30 UTCJun 30, 08:35 UTC2h 5m
2026-06-30 QFA616 MEL → BNE Jun 30, 02:45 UTCJun 30, 04:40 UTC1h 55m
2026-06-30 QFA837 - Jun 30, 00:09 UTCJun 30, 00:49 UTC40m

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?
Mode-S 7C6DDF is currently broadcasting from the ground.
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 QFA138, QFA933, QFA156, QFA135, QFA169.