Apparatus

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sensors Mode-S transponder

7C6DD6

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DD6
Octal
37066726
Decimal
8,154,582
Country
AU
Tail
VH-VZC
Type
B738
No current signal · last broadcast 1h ago
Flights observed
329
Distinct callsigns
20
Country
AU
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 7C6DD6.

Country allocation

The ICAO 24-bit address 7C6DD6 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
QFA578 - 6 2026-07-13
QFA139 - 6 2026-07-01
QFA121 - 6 2026-06-27
QFA651 - 5 2026-06-18
QFA541 - 5 2026-07-08
QFA408 - 5 2026-07-13
QFA137 - 5 2026-07-01
QFA122 - 5 2026-06-27
QFA884 Qantas 4 2026-05-14
QFA773 Qantas 4 2026-06-05
QFA595 - 4 2026-06-24
QFA594 - 4 2026-06-24
QFA593 - 4 2026-06-24
QFA592 - 4 2026-06-23
QFA503 Qantas 4 2026-06-23
QFA185 - 4 2026-06-21
QFA178 Qantas 4 2026-04-24
QFA147 - 4 2026-06-27
QFA133 - 4 2026-07-04
QFA942 Qantas 3 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QFA578 - Jul 13, 23:50 UTCJul 14, 01:30 UTC1h 40m
2026-07-13 QFA408 MEL → SYD Jul 13, 20:45 UTCJul 13, 22:00 UTC1h 15m
2026-07-13 QFA633 BNE → MEL Jul 13, 07:40 UTCJul 13, 10:05 UTC2h 25m
2026-07-13 QFA620 MEL → BNE Jul 13, 04:50 UTCJul 13, 06:45 UTC1h 55m
2026-07-13 QFA621 BNE → MEL Jul 13, 01:25 UTCJul 13, 03:30 UTC2h 5m
2026-07-12 QFA608 MEL → BNE Jul 12, 22:10 UTCJul 13, 00:01 UTC1h 50m
2026-07-12 QFA485 SYD → MEL Jul 12, 09:40 UTCJul 12, 11:01 UTC1h 20m
2026-07-12 QFA468 MEL → SYD Jul 12, 07:10 UTCJul 12, 08:25 UTC1h 15m
2026-07-12 QFA449 - Jul 12, 04:35 UTCJul 12, 05:50 UTC1h 15m
2026-07-12 QFA436 MEL → SYD Jul 12, 01:15 UTCJul 12, 02:15 UTC1h 0m
2026-07-09 QFA1050 MEL → MEL Jul 9, 22:55 UTCJul 10, 08:35 UTC9h 40m
2026-07-09 QFA479 SYD → MEL Jul 9, 09:00 UTCJul 9, 10:00 UTC1h 0m
2026-07-09 QFA729 SYD → SYD Jul 9, 01:05 UTCJul 9, 08:00 UTC6h 55m
2026-07-08 QFA412 MEL → SYD Jul 8, 22:15 UTCJul 8, 23:25 UTC1h 10m
2026-07-08 QFA776 PER → MEL Jul 8, 16:00 UTCJul 8, 19:10 UTC3h 10m
2026-07-08 QFA653 - Jul 8, 13:10 UTCJul 8, 13:35 UTC25m
2026-07-08 QFA653 - Jul 8, 09:15 UTCJul 8, 11:10 UTC1h 55m
2026-07-08 QFA541 BNE → SYD Jul 8, 06:15 UTCJul 8, 07:30 UTC1h 15m
2026-07-08 QFA616 MEL → BNE Jul 8, 03:05 UTCJul 8, 04:55 UTC1h 50m
2026-07-08 QFA433 SYD → MEL Jul 8, 00:40 UTCJul 8, 01:50 UTC1h 10m
2026-07-07 QFA507 BNE → SYD Jul 7, 21:55 UTCJul 7, 23:10 UTC1h 15m
2026-07-07 QFA558 SYD → BNE Jul 7, 12:05 UTCJul 7, 13:15 UTC1h 10m
2026-07-07 QFA1043 SYD → SYD Jul 7, 00:30 UTCJul 7, 10:05 UTC9h 35m
2026-07-06 QFA414 MEL → SYD Jul 6, 21:45 UTCJul 6, 23:00 UTC1h 15m
2026-07-05 QFA1050 MEL → MEL Jul 5, 22:35 UTCJul 6, 07:35 UTC9h 0m
2026-07-04 QFA1051 MEL → MEL Jul 4, 22:30 UTCJul 5, 07:55 UTC9h 25m
2026-07-04 QFA170 - Jul 4, 06:40 UTCJul 4, 07:20 UTC40m
2026-07-04 QFA133 - Jul 4, 02:10 UTCJul 4, 02:25 UTC15m
2026-07-03 QFA133 - Jul 3, 23:35 UTCJul 4, 00:15 UTC40m
2026-07-03 QFA132 - Jul 3, 18:15 UTCJul 3, 21:50 UTC3h 35m
2026-07-03 QFA135 - Jul 3, 12:50 UTCJul 3, 13:10 UTC20m
2026-07-03 QFA135 - Jul 3, 10:15 UTCJul 3, 11:00 UTC45m
2026-07-03 QFA196 WLG → BNE Jul 3, 03:45 UTCJul 3, 07:25 UTC3h 40m
2026-07-02 QFA195 BNE → WLG Jul 2, 23:45 UTCJul 3, 02:35 UTC2h 50m
2026-07-02 QFA126 - Jul 2, 05:35 UTCJul 2, 09:05 UTC3h 30m
2026-07-02 QFA153 MEL → AKL Jul 2, 00:50 UTCJul 2, 04:00 UTC3h 10m
2026-07-01 QFA168 - Jul 1, 22:15 UTCJul 1, 23:00 UTC45m
2026-07-01 QFA168 - Jul 1, 19:25 UTCJul 1, 19:35 UTC10m
2026-07-01 QFA139 - Jul 1, 13:55 UTCJul 1, 14:10 UTC15m
2026-07-01 QFA139 - Jul 1, 11:35 UTCJul 1, 12:15 UTC40m
2026-07-01 QFA136 - Jul 1, 08:30 UTCJul 1, 09:40 UTC1h 10m
2026-07-01 QFA137 - Jul 1, 05:05 UTCJul 1, 05:20 UTC15m
2026-07-01 QFA137 - Jul 1, 02:45 UTCJul 1, 03:10 UTC25m
2026-06-30 QFA410 MEL → SYD Jun 30, 21:05 UTCJun 30, 22:10 UTC1h 5m
2026-06-30 QFA158 AKL → MEL Jun 30, 08:40 UTCJun 30, 12:15 UTC3h 35m
2026-06-30 QFA209 - Jun 30, 04:20 UTCJun 30, 06:45 UTC2h 25m
2026-06-29 QFA210 - Jun 29, 23:19 UTCJun 30, 02:45 UTC3h 26m
2026-06-29 QFA157 MEL → AKL Jun 29, 08:44 UTCJun 29, 11:55 UTC3h 10m
2026-06-29 QFA156 - Jun 29, 03:39 UTCJun 29, 07:20 UTC3h 40m
2026-06-28 QFA143 - Jun 28, 23:50 UTCJun 29, 02:25 UTC2h 35m

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

Mode-S 7C6DD6 frequently asked

What is Mode-S code 7C6DD6?
7C6DD6 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZC.
Where is Mode-S 7C6DD6 registered?
Mode-S code 7C6DD6 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DD6 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DD6, octal 37066726, decimal 8,154,582.
What flights does 7C6DD6 operate?
Mode-S 7C6DD6 has broadcast 20 distinct callsigns, including QFA578, QFA139, QFA121, QFA651, QFA541.