Apparatus

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sensors Mode-S transponder

7C2431

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-HFN · ROBINSON R-44 Raven · operated by E R HELI CHARTER PTY LTD

Hex
7C2431
Octal
37022061
Decimal
8,135,729
Country
AU
Tail
VH-HFN
Type
R44
No current signal · last broadcast 3d ago
Flights observed
46
Distinct callsigns
1
Country
AU
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 7C2431.

Country allocation

The ICAO 24-bit address 7C2431 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 1 distinct

Callsign Airline Flights Last seen
HFN - 46 2026-05-30

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-05-30 HFN MBW → MBW May 30, 06:00 UTCMay 30, 07:00 UTC1h 0m
2026-05-29 HFN MBW → MBW May 29, 23:50 UTCMay 30, 01:20 UTC1h 30m
2026-05-23 HFN MBW → MBW May 23, 05:00 UTCMay 23, 05:40 UTC40m
2026-05-23 HFN - May 23, 01:45 UTCMay 23, 02:25 UTC40m
2026-05-23 HFN MBW → MBW May 23, 00:00 UTCMay 23, 01:10 UTC1h 10m
2026-05-22 HFN MBW → MBW May 22, 06:05 UTCMay 22, 07:00 UTC55m
2026-05-18 HFN MBW → MBW May 18, 01:30 UTCMay 18, 02:35 UTC1h 5m
2026-05-16 HFN - May 16, 05:00 UTCMay 16, 05:20 UTC20m
2026-05-16 HFN - May 16, 01:15 UTCMay 16, 01:50 UTC35m
2026-05-15 HFN - May 15, 04:10 UTCMay 15, 04:45 UTC35m
2026-05-15 HFN - May 15, 02:35 UTCMay 15, 03:15 UTC40m
2026-05-14 HFN MBW → MBW May 14, 23:40 UTCMay 15, 00:05 UTC25m
2026-05-11 HFN MBW → MBW May 11, 06:15 UTCMay 11, 06:35 UTC20m
2026-05-09 HFN MBW → MBW May 9, 03:15 UTCMay 9, 04:30 UTC1h 15m
2026-05-06 HFN MBW → MBW May 6, 04:35 UTCMay 6, 05:45 UTC1h 10m
2026-05-05 HFN - May 5, 05:05 UTCMay 5, 05:25 UTC20m
2026-05-04 HFN - May 4, 05:55 UTCMay 4, 06:15 UTC20m
2026-05-03 HFN - May 3, 21:35 UTCMay 3, 22:09 UTC35m
2026-05-02 HFN - May 2, 00:55 UTCMay 2, 02:00 UTC1h 5m
2026-04-30 HFN - Apr 30, 06:45 UTCApr 30, 07:55 UTC1h 10m
2026-04-30 HFN MBW → MBW Apr 30, 03:40 UTCApr 30, 03:50 UTC10m
2026-04-30 HFN MBW → MBW Apr 30, 02:55 UTCApr 30, 03:05 UTC10m
2026-04-28 HFN MBW → MBW Apr 28, 07:05 UTCApr 28, 07:55 UTC50m
2026-04-27 HFN - Apr 27, 06:20 UTCApr 27, 06:35 UTC15m
2026-04-27 HFN - Apr 27, 02:05 UTCApr 27, 02:25 UTC20m
2026-04-26 HFN - Apr 26, 06:30 UTCApr 26, 07:50 UTC1h 20m
2026-04-26 HFN - Apr 26, 03:15 UTCApr 26, 04:15 UTC1h 0m
2026-04-26 HFN - Apr 26, 01:15 UTCApr 26, 02:10 UTC55m
2026-04-25 HFN MBW → MBW Apr 25, 03:55 UTCApr 25, 05:20 UTC1h 25m
2026-04-25 HFN MBW → MBW Apr 25, 01:05 UTCApr 25, 01:40 UTC35m
2026-04-24 HFN MBW → MBW Apr 24, 23:25 UTCApr 25, 00:10 UTC45m
2026-04-24 HFN - Apr 24, 04:45 UTCApr 24, 05:00 UTC15m
2026-04-24 HFN - Apr 24, 02:55 UTCApr 24, 03:15 UTC20m
2026-04-23 HFN MBW → MBW Apr 23, 03:00 UTCApr 23, 03:55 UTC55m
2026-04-23 HFN MBW → MBW Apr 23, 00:20 UTCApr 23, 01:10 UTC50m
2026-04-22 HFN MBW → MBW Apr 22, 00:30 UTCApr 22, 01:50 UTC1h 20m
2026-04-21 HFN MBW → MBW Apr 21, 01:00 UTCApr 21, 02:15 UTC1h 15m
2026-04-19 HFN - Apr 19, 04:40 UTCApr 19, 05:55 UTC1h 15m
2026-04-19 HFN MBW → MBW Apr 19, 01:35 UTCApr 19, 02:40 UTC1h 5m
2026-04-18 HFN - Apr 18, 04:45 UTCApr 18, 05:05 UTC20m
2026-04-18 HFN MBW → MBW Apr 18, 04:05 UTCApr 18, 05:05 UTC1h 0m
2026-04-18 HFN MBW → MBW Apr 18, 00:30 UTCApr 18, 01:15 UTC45m
2026-04-17 HFN - Apr 17, 06:20 UTCApr 17, 06:55 UTC35m
2026-04-16 HFN - Apr 16, 23:45 UTCApr 17, 00:15 UTC30m
2026-04-15 HFN KAH → MBW Apr 15, 21:05 UTCApr 15, 21:35 UTC30m
2026-04-15 HFN MBW → KAH Apr 15, 20:50 UTCApr 15, 21:00 UTC10m

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

Mode-S 7C2431 frequently asked

What is Mode-S code 7C2431?
7C2431 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-HFN.
Where is Mode-S 7C2431 registered?
Mode-S code 7C2431 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C2431 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C2431, octal 37022061, decimal 8,135,729.
What flights does 7C2431 operate?
Mode-S 7C2431 has broadcast 1 distinct callsign, including HFN.