Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7C8071

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-ZNN · BOEING 787-9 Dreamliner · operated by QANTAS AIRWAYS LIMITED

Hex
7C8071
Octal
37100161
Decimal
8,159,345
Country
AU
Tail
VH-ZNN
Type
B789
No current signal · last broadcast 14h ago
Flights observed
8
Distinct callsigns
2
Country
AU
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 7C8071.

Country allocation

The ICAO 24-bit address 7C8071 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 2 distinct

Callsign Airline Flights Last seen
QFA219 Qantas 6 2026-04-14
QFA33 Qantas 2 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 QFA219 PER → SIN Apr 14, 07:10 UTCApr 14, 08:40 UTC1h 30m
2026-04-14 QFA219 PER → SIN Apr 14, 05:55 UTCApr 14, 07:10 UTC1h 15m
2026-04-13 QFA219 PER → SIN Apr 13, 22:00 UTCApr 13, 23:40 UTC1h 40m
2026-04-13 QFA219 PER → SIN Apr 13, 19:20 UTCApr 13, 19:40 UTC20m
2026-04-13 QFA219 PER → SIN Apr 13, 15:00 UTCApr 13, 15:15 UTC15m
2026-04-13 QFA219 PER → SIN Apr 13, 11:45 UTCApr 13, 12:15 UTC30m
2026-04-13 QFA33 SYD → PER Apr 13, 08:30 UTCApr 13, 09:05 UTC35m
2026-04-13 QFA33 SYD → PER Apr 13, 04:50 UTCApr 13, 06:45 UTC1h 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-ZNN page for operator, model, and routing details .

Mode-S 7C8071 frequently asked

What is Mode-S code 7C8071?
7C8071 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-ZNN.
Where is Mode-S 7C8071 registered?
Mode-S code 7C8071 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C8071 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C8071, octal 37100161, decimal 8,159,345.
What flights does 7C8071 operate?
Mode-S 7C8071 has broadcast 2 distinct callsigns, including QFA219, QFA33.