Apparatus

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sensors Mode-S transponder

7C6DDC

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DDC
Octal
37066734
Decimal
8,154,588
Country
AU
Tail
VH-VZI
Type
B738
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
370
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S 7C6DDC.

Country allocation

The ICAO 24-bit address 7C6DDC 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
QFA169 Qantas 10 2026-05-21
QFA156 Qantas 8 2026-05-21
QFA168 Qantas 7 2026-05-21
QFA132 Qantas 7 2026-04-20
QFA578 - 6 2026-07-09
QFA147 - 6 2026-07-17
QFA841 - 5 2026-07-13
QFA840 - 5 2026-07-13
QFA167 Qantas 5 2026-05-28
QFA140 - 5 2026-07-14
QFA138 Qantas 5 2026-05-19
QFA136 Qantas 5 2026-06-10
QFA942 - 4 2026-07-23
QFA58 Qantas 4 2026-07-21
QFA579 - 4 2026-07-09
QFA154 Qantas 4 2026-04-26
QFA141 Qantas 4 2026-04-25
QFA139 Qantas 4 2026-05-12
QFA137 Qantas 4 2026-06-10
QFA134 Qantas 4 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA151 MEL → AKL Jul 26, 20:40 UTCJul 26, 21:10 UTC30m
2026-07-26 QFA158 AKL → MEL Jul 26, 08:35 UTCJul 26, 12:15 UTC3h 40m
2026-07-26 QFA155 MEL → AKL Jul 26, 06:45 UTCJul 26, 07:05 UTC20m
2026-07-26 QFA155 MEL → AKL Jul 26, 04:40 UTCJul 26, 04:50 UTC10m
2026-07-26 QFA155 MEL → AKL Jul 26, 03:55 UTCJul 26, 04:25 UTC30m
2026-07-25 QFA425 SYD → MEL Jul 25, 23:45 UTCJul 26, 00:55 UTC1h 10m
2026-07-25 QFA182 AKL → SYD Jul 25, 06:40 UTCJul 25, 09:40 UTC3h 0m
2026-07-25 QFA181 SYD → AKL Jul 25, 04:55 UTCJul 25, 05:05 UTC10m
2026-07-25 QFA181 SYD → AKL Jul 25, 02:50 UTCJul 25, 03:20 UTC30m
2026-07-24 QFA418 MEL → SYD Jul 24, 22:30 UTCJul 25, 00:00 UTC1h 30m
2026-07-24 QFA479 SYD → MEL Jul 24, 08:25 UTCJul 24, 09:40 UTC1h 15m
2026-07-24 QFA595 ADL → PER Jul 24, 06:05 UTCJul 24, 07:15 UTC1h 10m
2026-07-24 QFA594 PER → BNE Jul 24, 04:05 UTCJul 24, 05:05 UTC1h 0m
2026-07-24 QFA593 ADL → PER Jul 24, 01:35 UTCJul 24, 02:45 UTC1h 10m
2026-07-23 QFA592 PER → ADL Jul 23, 23:35 UTCJul 24, 00:35 UTC1h 0m
2026-07-23 QFA503 BNE → SYD Jul 23, 20:30 UTCJul 23, 21:45 UTC1h 15m
2026-07-23 QFA942 PER → BNE Jul 23, 15:05 UTCJul 23, 19:05 UTC4h 0m
2026-07-23 QFA891 ADL → PER Jul 23, 09:35 UTCJul 23, 12:45 UTC3h 10m
2026-07-23 QFA886 PER → ADL Jul 23, 06:05 UTCJul 23, 08:35 UTC2h 30m
2026-07-23 QFA887 ADL → PER Jul 23, 01:25 UTCJul 23, 04:30 UTC3h 5m
2026-07-22 QFA882 PER → ADL Jul 22, 22:00 UTCJul 23, 00:30 UTC2h 30m
2026-07-22 QFA891 ADL → PER Jul 22, 12:05 UTCJul 22, 12:40 UTC35m
2026-07-22 QFA765 SYD → ADL Jul 22, 00:50 UTCJul 22, 04:45 UTC3h 55m
2026-07-21 QFA637 BNE → MEL Jul 21, 09:20 UTCJul 21, 11:15 UTC1h 55m
2026-07-21 QFA58 POM → BNE Jul 21, 00:15 UTCJul 21, 06:55 UTC6h 40m
2026-07-20 QFA118 - Jul 20, 00:05 UTCJul 20, 03:05 UTC3h 0m
2026-07-19 QFA144 AKL → SYD Jul 19, 07:00 UTCJul 19, 22:00 UTC15h 0m
2026-07-19 QFA117 - Jul 19, 02:25 UTCJul 19, 05:15 UTC2h 50m
2026-07-17 QFA58 BNE → BNE Jul 17, 23:20 UTCJul 18, 06:20 UTC7h 1m
2026-07-17 QFA120 - Jul 17, 18:10 UTCJul 17, 21:15 UTC3h 5m
2026-07-17 QFA147 SYD → AKL Jul 17, 08:45 UTCJul 17, 11:35 UTC2h 50m
2026-07-17 QFA180 NLK → SYD Jul 17, 00:50 UTCJul 17, 06:35 UTC5h 45m
2026-07-16 QFA408 MEL → SYD Jul 16, 21:00 UTCJul 16, 22:15 UTC1h 15m
2026-07-16 QFA158 - Jul 16, 09:25 UTCJul 16, 12:49 UTC3h 25m
2026-07-16 QFA209 - Jul 16, 04:20 UTCJul 16, 07:10 UTC2h 50m
2026-07-15 QFA210 - Jul 15, 23:25 UTCJul 16, 02:20 UTC2h 55m
2026-07-15 QFA147 SYD → AKL Jul 15, 08:25 UTCJul 15, 11:40 UTC3h 15m
2026-07-15 QFA180 SYD → SYD Jul 15, 00:05 UTCJul 15, 06:00 UTC5h 55m
2026-07-14 QFA140 - Jul 14, 18:50 UTCJul 14, 22:00 UTC3h 10m
2026-07-14 QFA147 - Jul 14, 11:35 UTCJul 14, 11:55 UTC20m
2026-07-14 QFA147 - Jul 14, 09:20 UTCJul 14, 09:45 UTC25m
2026-07-14 QFA738 ADL → SYD Jul 14, 02:45 UTCJul 14, 04:15 UTC1h 30m
2026-07-14 QFA733 SYD → ADL Jul 14, 00:00 UTCJul 14, 01:50 UTC1h 50m
2026-07-13 QFA589 - Jul 13, 21:15 UTCJul 13, 22:30 UTC1h 15m
2026-07-13 QFA598 - Jul 13, 09:35 UTCJul 13, 10:35 UTC1h 0m
2026-07-13 QFA841 - Jul 13, 06:25 UTCJul 13, 07:25 UTC1h 0m
2026-07-13 QFA840 - Jul 13, 02:30 UTCJul 13, 02:40 UTC10m
2026-07-12 QFA840 - Jul 12, 22:20 UTCJul 12, 22:55 UTC35m
2026-07-12 QFA581 - Jul 12, 06:20 UTCJul 12, 08:30 UTC2h 10m
2026-07-12 QFA580 - Jul 12, 03:15 UTCJul 12, 05:15 UTC2h 0m

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

Mode-S 7C6DDC frequently asked

What is Mode-S code 7C6DDC?
7C6DDC is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZI.
Where is Mode-S 7C6DDC registered?
Mode-S code 7C6DDC is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DDC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DDC, octal 37066734, decimal 8,154,588.
What flights does 7C6DDC operate?
Mode-S 7C6DDC has broadcast 20 distinct callsigns, including QFA169, QFA156, QFA168, QFA132, QFA578.