Apparatus

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sensors Mode-S transponder

7C6DDE

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DDE
Octal
37066736
Decimal
8,154,590
Country
AU
Tail
VH-VZK
Type
B738
No current signal · last broadcast Jul 26, 08:35 UTC
Flights observed
388
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 08:35 UTC

Last known position

Most recent position reported by Mode-S 7C6DDE.

Country allocation

The ICAO 24-bit address 7C6DDE 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
QFA185 Qantas 9 2026-07-26
QFA186 Qantas 8 2026-07-26
QFA147 Qantas 6 2026-07-24
QFA171 - 5 2026-07-11
QFA170 Qantas 5 2026-07-17
QFA142 - 5 2026-07-18
QFA120 Qantas 5 2026-07-25
QFA935 Qantas 4 2026-07-21
QFA776 - 4 2026-06-25
QFA749 - 4 2026-06-18
QFA670 - 4 2026-06-18
QFA484 Qantas 4 2026-05-04
QFA172 - 4 2026-07-11
QFA157 - 4 2026-07-17
QFA152 - 4 2026-07-12
QFA139 - 4 2026-07-13
QFA133 - 4 2026-07-17
QFA125 Qantas 4 2026-07-23
QFA121 Qantas 4 2026-07-24
QFA942 - 3 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA186 ZQN → BNE Jul 26, 05:05 UTCJul 26, 08:35 UTC3h 31m
2026-07-26 QFA185 BNE → ZQN Jul 26, 03:20 UTCJul 26, 03:30 UTC10m
2026-07-26 QFA185 BNE → ZQN Jul 26, 00:40 UTCJul 26, 01:20 UTC40m
2026-07-25 QFA120 AKL → BNE Jul 25, 18:25 UTCJul 25, 22:05 UTC3h 40m
2026-07-25 QFA209 SIN → PER Jul 25, 04:30 UTCJul 25, 06:55 UTC2h 25m
2026-07-24 QFA210 AKL → OOL Jul 24, 23:25 UTCJul 25, 02:55 UTC3h 30m
2026-07-24 QFA147 SYD → AKL Jul 24, 08:10 UTCJul 24, 10:35 UTC2h 25m
2026-07-24 QFA122 ZQN → SYD Jul 24, 03:45 UTCJul 24, 06:30 UTC2h 45m
2026-07-24 QFA121 SYD → ZQN Jul 24, 02:05 UTCJul 24, 02:15 UTC10m
2026-07-24 QFA121 SYD → ZQN Jul 24, 00:05 UTCJul 24, 00:30 UTC25m
2026-07-23 QFA140 AKL → SYD Jul 23, 18:10 UTCJul 23, 21:45 UTC3h 35m
2026-07-23 QFA125 BNE → AKL Jul 23, 09:10 UTCJul 23, 11:35 UTC2h 25m
2026-07-23 QFA184 NLK → BNE Jul 23, 02:20 UTCJul 23, 07:35 UTC5h 15m
2026-07-22 QFA198 APW → BNE Jul 22, 11:35 UTCJul 23, 00:20 UTC12h 45m
2026-07-22 QFA186 ZQN → BNE Jul 22, 04:45 UTCJul 22, 05:05 UTC20m
2026-07-22 QFA185 BNE → ZQN Jul 22, 03:20 UTCJul 22, 03:30 UTC10m
2026-07-22 QFA185 BNE → ZQN Jul 22, 00:40 UTCJul 22, 01:25 UTC45m
2026-07-21 QFA938 PER → BNE Jul 21, 05:40 UTCJul 21, 09:35 UTC3h 55m
2026-07-21 QFA935 BNE → PER Jul 21, 00:40 UTCJul 21, 04:15 UTC3h 35m
2026-07-20 QFA935 BNE → PER Jul 20, 22:50 UTCJul 20, 23:45 UTC55m
2026-07-20 QFA942 PER → BNE Jul 20, 15:10 UTCJul 20, 19:05 UTC3h 55m
2026-07-20 QFA653 SYD → PER Jul 20, 09:15 UTCJul 20, 13:50 UTC4h 35m
2026-07-20 QFA462 MEL → SYD Jul 20, 06:05 UTCJul 20, 07:10 UTC1h 5m
2026-07-20 QFA919 KTA → PER Jul 20, 02:50 UTCJul 20, 04:55 UTC2h 5m
2026-07-19 QFA918 PER → KTA Jul 19, 23:35 UTCJul 20, 01:25 UTC1h 50m
2026-07-19 QFA401 SYD → MEL Jul 19, 20:15 UTCJul 19, 21:25 UTC1h 10m
2026-07-19 QFA182 AKL → SYD Jul 19, 06:50 UTCJul 19, 09:25 UTC2h 35m
2026-07-19 QFA181 SYD → AKL Jul 19, 02:30 UTCJul 19, 05:05 UTC2h 35m
2026-07-18 QFA142 - Jul 18, 22:50 UTCJul 18, 23:25 UTC35m
2026-07-18 QFA142 - Jul 18, 20:25 UTCJul 18, 20:40 UTC15m
2026-07-18 QFA209 - Jul 18, 04:25 UTCJul 18, 07:05 UTC2h 40m
2026-07-17 QFA210 - Jul 17, 23:25 UTCJul 18, 02:29 UTC3h 5m
2026-07-17 QFA157 MEL → AKL Jul 17, 09:15 UTCJul 17, 12:35 UTC3h 20m
2026-07-17 QFA170 CHC → MEL Jul 17, 04:14 UTCJul 17, 07:35 UTC3h 20m
2026-07-17 QFA133 - Jul 17, 02:39 UTCJul 17, 02:59 UTC20m
2026-07-16 QFA133 - Jul 16, 23:44 UTCJul 17, 00:30 UTC45m
2026-07-16 QFA186 - Jul 16, 05:25 UTCJul 16, 08:30 UTC3h 5m
2026-07-16 QFA185 - Jul 16, 00:35 UTCJul 16, 04:00 UTC3h 25m
2026-07-15 QFA120 - Jul 15, 18:35 UTCJul 15, 21:50 UTC3h 15m
2026-07-15 QFA149 SYD → AKL Jul 15, 09:40 UTCJul 15, 12:25 UTC2h 45m
2026-07-15 QFA92 - Jul 15, 04:25 UTCJul 15, 05:40 UTC1h 15m
2026-07-14 QFA91 - Jul 14, 23:00 UTCJul 15, 00:05 UTC1h 5m
2026-07-14 QFA549 BNE → SYD Jul 14, 08:30 UTCJul 14, 09:45 UTC1h 15m
2026-07-13 QFA57 BNE → BNE Jul 13, 23:45 UTCJul 14, 06:35 UTC6h 50m
2026-07-13 QFA132 - Jul 13, 18:20 UTCJul 13, 21:55 UTC3h 35m
2026-07-13 QFA139 SYD → CHC Jul 13, 10:45 UTCJul 13, 13:20 UTC2h 35m
2026-07-13 QFA146 - Jul 13, 04:30 UTCJul 13, 07:50 UTC3h 20m
2026-07-13 QFA153 - Jul 13, 02:50 UTCJul 13, 03:05 UTC15m
2026-07-13 QFA153 - Jul 13, 00:10 UTCJul 13, 00:35 UTC25m
2026-07-12 QFA152 - Jul 12, 18:45 UTCJul 12, 22:40 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-VZK page for operator, model, and routing details .

Mode-S 7C6DDE frequently asked

What is Mode-S code 7C6DDE?
7C6DDE is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZK.
Where is Mode-S 7C6DDE registered?
Mode-S code 7C6DDE is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DDE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 08:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DDE, octal 37066736, decimal 8,154,590.
What flights does 7C6DDE operate?
Mode-S 7C6DDE has broadcast 20 distinct callsigns, including QFA185, QFA186, QFA147, QFA171, QFA170.