Apparatus

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sensors Mode-S transponder

7C6DD9

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C6DD9
Octal
37066731
Decimal
8,154,585
Country
AU
Tail
VH-VZF
Type
B738
Broadcasting now · callsign QFA579 · 38,000 ft
Flights observed
171
Distinct callsigns
20
Country
AU
Last broadcast
18m ago

Current position

7C6DD9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7C6DD9 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
QFA134 Qantas 5 2026-04-16
QFA166 Qantas 4 2026-05-03
QFA883 Qantas 3 2026-04-29
QFA637 Qantas 3 2026-05-15
QFA57 Qantas 3 2026-05-25
QFA500 Qantas 3 2026-05-22
QFA461 Qantas 3 2026-04-30
QFA176 Qantas 3 2026-04-13
QFA174 Qantas 3 2026-04-17
QFA167 Qantas 3 2026-04-15
QFA165 Qantas 3 2026-05-02
QFA151 Qantas 3 2026-04-17
QFA144 Qantas 3 2026-04-18
QFA132 Qantas 3 2026-04-15
QFA942 Qantas 2 2026-05-01
QFA933 Qantas 2 2026-05-03
QFA919 Qantas 2 2026-05-12
QFA860 Qantas 2 2026-05-28
QFA773 Qantas 2 2026-05-16
QFA769 Qantas 2 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 QFA579 SYD → PER May 30, 03:10 UTCMay 30, 04:15 UTC1h 5m
2026-05-30 QFA578 PER → SYD May 30, 00:05 UTCMay 30, 02:00 UTC1h 55m
2026-05-29 QFA744 ADL → SYD May 29, 07:45 UTCMay 29, 09:25 UTC1h 40m
2026-05-29 QFA739 SYD → ADL May 29, 04:55 UTCMay 29, 06:40 UTC1h 45m
2026-05-29 QFA527 BNE → SYD May 29, 02:20 UTCMay 29, 03:30 UTC1h 10m
2026-05-28 QFA860 BNE → TSV May 28, 20:45 UTCMay 29, 01:10 UTC4h 25m
2026-05-28 QFA622 MEL → BNE May 28, 05:45 UTCMay 28, 08:25 UTC2h 40m
2026-05-28 QFA623 BNE → MEL May 28, 02:50 UTCMay 28, 04:40 UTC1h 50m
2026-05-27 QFA860 BNE → TSV May 27, 20:45 UTCMay 28, 01:00 UTC4h 15m
2026-05-27 QFA546 SYD → BNE May 27, 07:50 UTCMay 27, 09:35 UTC1h 45m
2026-05-27 QFA454 MEL → SYD May 27, 05:40 UTCMay 27, 06:44 UTC1h 5m
2026-05-27 QFA443 SYD → MEL May 27, 03:09 UTCMay 27, 04:24 UTC1h 15m
2026-05-27 QFA519 BNE → SYD May 27, 00:39 UTCMay 27, 01:44 UTC1h 5m
2026-05-25 QFA57 BNE → POM May 25, 23:24 UTCMay 26, 05:54 UTC6h 30m
2026-05-25 QFA58 POM → BNE May 25, 01:55 UTCMay 25, 07:30 UTC5h 35m
2026-05-23 QFA92 NOU → SYD May 23, 23:30 UTCMay 24, 06:00 UTC6h 30m
2026-05-23 QFA140 AKL → SYD May 23, 18:25 UTCMay 23, 21:20 UTC2h 55m
2026-05-23 QFA155 MEL → AKL May 23, 03:45 UTCMay 23, 07:00 UTC3h 15m
2026-05-22 QFA615 BNE → MEL May 22, 23:20 UTCMay 23, 01:45 UTC2h 25m
2026-05-22 QFA500 SYD → BNE May 22, 20:10 UTCMay 22, 21:20 UTC1h 10m
2026-05-22 QFA148 AKL → SYD May 22, 06:20 UTCMay 22, 09:30 UTC3h 10m
2026-05-22 QFA145 SYD → AKL May 22, 04:25 UTCMay 22, 04:45 UTC20m
2026-05-22 QFA145 SYD → AKL May 22, 02:00 UTCMay 22, 02:35 UTC35m
2026-05-21 QFA142 AKL → SYD May 21, 20:30 UTCMay 21, 23:20 UTC2h 50m
2026-05-20 QFA153 MEL → AKL May 20, 23:45 UTCMay 21, 03:10 UTC3h 25m
2026-05-20 QFA168 CHC → MEL May 20, 18:25 UTCMay 20, 21:45 UTC3h 20m
2026-05-20 QFA169 MEL → CHC May 20, 08:45 UTCMay 20, 11:45 UTC3h 0m
2026-05-20 QFA154 AKL → MEL May 20, 02:00 UTCMay 20, 05:25 UTC3h 26m
2026-05-19 QFA141 SYD → AKL May 19, 21:20 UTCMay 20, 00:00 UTC2h 40m
2026-05-19 QFA146 AKL → SYD May 19, 06:40 UTCMay 19, 07:30 UTC50m
2026-05-19 QFA146 AKL → SYD May 19, 04:15 UTCMay 19, 04:35 UTC20m
2026-05-18 QFA153 MEL → AKL May 18, 23:45 UTCMay 19, 03:00 UTC3h 15m
2026-05-18 QFA483 SYD → MEL May 18, 09:05 UTCMay 18, 10:15 UTC1h 10m
2026-05-18 QFA595 ADL → PER May 18, 06:40 UTCMay 18, 07:50 UTC1h 10m
2026-05-18 QFA594 PER → BNE May 18, 04:15 UTCMay 18, 05:15 UTC1h 0m
2026-05-18 QFA593 ADL → PER May 18, 01:50 UTCMay 18, 03:01 UTC1h 10m
2026-05-17 QFA592 PER → ADL May 17, 23:50 UTCMay 18, 00:50 UTC1h 0m
2026-05-17 QFA408 MEL → SYD May 17, 21:05 UTCMay 17, 22:10 UTC1h 5m
2026-05-17 QFA485 MEL → PER May 17, 09:20 UTCMay 17, 10:45 UTC1h 25m
2026-05-17 QFA595 ADL → PER May 17, 05:55 UTCMay 17, 07:05 UTC1h 10m
2026-05-17 QFA594 PER → BNE May 17, 03:55 UTCMay 17, 04:55 UTC1h 0m
2026-05-16 QFA642 PER → SYD May 16, 22:10 UTCMay 17, 02:05 UTC3h 55m
2026-05-16 QFA773 PER → SIN May 16, 09:25 UTCMay 16, 12:55 UTC3h 30m
2026-05-16 QFA172 WLG → MEL May 16, 02:40 UTCMay 16, 06:01 UTC3h 21m
2026-05-15 QFA171 MEL → WLG May 15, 22:20 UTCMay 16, 01:35 UTC3h 15m
2026-05-15 QFA637 BNE → MEL May 15, 09:30 UTCMay 15, 11:35 UTC2h 5m
2026-05-15 QFA624 MEL → BNE May 15, 06:15 UTCMay 15, 08:20 UTC2h 5m
2026-05-15 QFA447 SYD → MEL May 15, 03:40 UTCMay 15, 04:45 UTC1h 5m
2026-05-15 QFA438 MEL → SYD May 15, 01:20 UTCMay 15, 02:25 UTC1h 5m
2026-05-14 QFA423 SYD → MEL May 14, 23:00 UTCMay 15, 00:10 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-VZF page for operator, model, and routing details .

Mode-S 7C6DD9 frequently asked

What is Mode-S code 7C6DD9?
7C6DD9 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-VZF.
Where is Mode-S 7C6DD9 registered?
Mode-S code 7C6DD9 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6DD9 broadcasting right now?
Yes. Mode-S 7C6DD9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6DD9, octal 37066731, decimal 8,154,585.
What flights does 7C6DD9 operate?
Mode-S 7C6DD9 has broadcast 20 distinct callsigns, including QFA134, QFA166, QFA883, QFA637, QFA57.