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
Broadcasting now · callsign QFA184 · 17,675 ft
Flights observed
362
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 21:45 UTC

Current position

7C6DDF is currently broadcasting. Map zoomed to live position.

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
QFA132 - 6 2026-07-16
QFA169 - 5 2026-06-23
QFA157 - 5 2026-07-15
QFA143 - 5 2026-07-13
QFA140 - 5 2026-07-13
QFA134 Qantas 5 2026-06-08
QFA133 - 5 2026-07-15
QFA936 Qantas 4 2026-05-25
QFA733 Qantas 4 2026-06-04
QFA185 Qantas 4 2026-07-25
QFA141 Qantas 4 2026-07-17
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA730 ADL → SYD Jul 26, 20:35 UTCJul 26, 21:45 UTC1h 10m
2026-07-26 QFA743 SYD → ADL Jul 26, 07:40 UTCJul 26, 09:20 UTC1h 40m
2026-07-26 QFA454 MEL → SYD Jul 26, 05:35 UTCJul 26, 06:40 UTC1h 6m
2026-07-26 QFA443 SYD → MEL Jul 26, 03:20 UTCJul 26, 04:35 UTC1h 15m
2026-07-26 QFA519 BNE → SYD Jul 26, 00:30 UTCJul 26, 01:55 UTC1h 25m
2026-07-25 QFA186 ZQN → BNE Jul 25, 07:05 UTCJul 25, 10:40 UTC3h 35m
2026-07-25 QFA185 BNE → ZQN Jul 25, 02:40 UTCJul 25, 05:25 UTC2h 45m
2026-07-24 QFA608 MEL → BNE Jul 24, 22:10 UTCJul 24, 23:55 UTC1h 45m
2026-07-24 QFA1051 BME → MEL Jul 24, 06:30 UTCJul 24, 07:45 UTC1h 15m
2026-07-23 QFA1050 MEL → BME Jul 23, 23:00 UTCJul 24, 00:05 UTC1h 5m
2026-07-23 QFA772 PER → MEL Jul 23, 10:05 UTCJul 23, 13:20 UTC3h 15m
2026-07-23 QFA769 MEL → PER Jul 23, 05:00 UTCJul 23, 08:30 UTC3h 30m
2026-07-22 QFA760 PER → MEL Jul 22, 22:30 UTCJul 23, 01:40 UTC3h 10m
2026-07-22 QFA651 BNE → PER Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 QFA579 SYD → PER Jul 22, 03:10 UTCJul 22, 05:15 UTC2h 5m
2026-07-22 QFA578 PER → SYD Jul 22, 00:05 UTCJul 22, 02:05 UTC2h 0m
2026-07-21 QFA730 ADL → SYD Jul 21, 20:40 UTCJul 21, 22:05 UTC1h 25m
2026-07-21 QFA697 MEL → ADL Jul 21, 09:15 UTCJul 21, 10:20 UTC1h 5m
2026-07-21 QFA465 - Jul 21, 06:55 UTCJul 21, 08:05 UTC1h 10m
2026-07-21 QFA450 MEL → SYD Jul 21, 04:15 UTCJul 21, 05:20 UTC1h 5m
2026-07-21 QFA437 SYD → MEL Jul 21, 01:25 UTCJul 21, 02:35 UTC1h 10m
2026-07-20 QFA511 BNE → SYD Jul 20, 22:55 UTCJul 21, 00:10 UTC1h 14m
2026-07-20 QFA500 SYD → BNE Jul 20, 20:15 UTCJul 20, 21:30 UTC1h 15m
2026-07-20 QFA179 SYD → NLK Jul 20, 01:00 UTCJul 20, 07:20 UTC6h 20m
2026-07-18 QFA101 SYD → SYD Jul 18, 23:10 UTCJul 19, 08:15 UTC9h 5m
2026-07-18 QFA162 WLG → SYD Jul 18, 18:05 UTCJul 18, 21:20 UTC3h 15m
2026-07-18 QFA163 SYD → WLG Jul 18, 08:45 UTCJul 18, 11:30 UTC2h 45m
2026-07-18 QFA144 - Jul 18, 02:05 UTCJul 18, 05:00 UTC2h 56m
2026-07-17 QFA141 SYD → AKL Jul 17, 21:44 UTCJul 18, 00:35 UTC2h 50m
2026-07-16 QFA204 POM → SYD Jul 16, 23:44 UTCJul 17, 07:30 UTC7h 45m
2026-07-16 QFA132 - Jul 16, 18:19 UTCJul 16, 21:35 UTC3h 15m
2026-07-16 QFA139 SYD → CHC Jul 16, 10:10 UTCJul 16, 13:05 UTC2h 55m
2026-07-16 QFA146 - Jul 16, 04:50 UTCJul 16, 07:35 UTC2h 45m
2026-07-15 QFA153 MEL → AKL Jul 15, 23:55 UTCJul 16, 03:30 UTC3h 35m
2026-07-15 QFA152 - Jul 15, 18:55 UTCJul 15, 22:30 UTC3h 35m
2026-07-15 QFA157 MEL → AKL Jul 15, 09:30 UTCJul 15, 13:00 UTC3h 30m
2026-07-15 QFA170 - Jul 15, 04:45 UTCJul 15, 08:00 UTC3h 15m
2026-07-15 QFA133 - Jul 15, 00:30 UTCJul 15, 03:30 UTC3h 0m
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

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?
Yes. Mode-S 7C6DDF is currently airborne.
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, QFA132.