Apparatus

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sensors Mode-S transponder

7C431C

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-NJI · BRITISH AEROSPACE 146-300 · operated by NATIONAL JET EXPRESS PTY LTD

Hex
7C431C
Octal
37041434
Decimal
8,143,644
Country
AU
Tail
VH-NJI
Type
B463
No current signal · last broadcast 1d ago
Flights observed
7
Distinct callsigns
4
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C431C.

Country allocation

The ICAO 24-bit address 7C431C 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 4 distinct

Callsign Airline Flights Last seen
JTE7484 National Jet Express 3 2026-04-13
JTE7448 National Jet Express 2 2026-04-13
JTE7440 - 1 2026-04-13
JTE7404 - 1 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 JTE7448 SYD → ADL Apr 13, 20:35 UTCApr 13, 20:55 UTC20m
2026-04-13 JTE7448 SYD → ADL Apr 13, 19:05 UTCApr 13, 19:45 UTC40m
2026-04-13 JTE7404 BNE → SYD Apr 13, 16:45 UTCApr 13, 18:10 UTC1h 25m
2026-04-13 JTE7440 SYD → BNE Apr 13, 14:20 UTCApr 13, 15:40 UTC1h 20m
2026-04-13 JTE7484 ADL → SYD Apr 13, 12:20 UTCApr 13, 13:05 UTC45m
2026-04-13 JTE7484 ADL → SYD Apr 13, 12:00 UTCApr 13, 13:05 UTC1h 5m
2026-04-13 JTE7484 ADL → SYD Apr 13, 11:20 UTCApr 13, 12:15 UTC55m

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

Mode-S 7C431C frequently asked

What is Mode-S code 7C431C?
7C431C is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-NJI.
Where is Mode-S 7C431C registered?
Mode-S code 7C431C is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C431C broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C431C, octal 37041434, decimal 8,143,644.
What flights does 7C431C operate?
Mode-S 7C431C has broadcast 4 distinct callsigns, including JTE7484, JTE7448, JTE7440, JTE7404.