Apparatus

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sensors Mode-S transponder

39B4A2

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HNFC · PILATUS PC-12

Hex
39B4A2
Octal
16332242
Decimal
3,781,794
Country
FR
Tail
F-HNFC
Type
PC12
No current signal · last broadcast 1d ago
Flights observed
41
Distinct callsigns
1
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 39B4A2.

Country allocation

The ICAO 24-bit address 39B4A2 falls within the block assigned to France (FR) by ICAO Annex 10, Volume III. Every aircraft registered in France 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
FHNFC - 41 2026-05-28

Recent flights last 41

DateFlightRouteTakeoffLandingDuration
2026-05-28 FHNFC - May 28, 06:05 UTCMay 28, 06:45 UTC40m
2026-05-28 FHNFC - May 28, 04:55 UTCMay 28, 05:35 UTC40m
2026-05-26 FHNFC DTM → VAF May 26, 14:45 UTCMay 26, 16:45 UTC2h 0m
2026-05-26 FHNFC - May 26, 05:59 UTCMay 26, 07:45 UTC1h 45m
2026-05-25 FHNFC - May 25, 15:00 UTCMay 25, 15:45 UTC45m
2026-05-25 FHNFC - May 25, 13:40 UTCMay 25, 14:25 UTC45m
2026-05-23 FHNFC - May 23, 17:20 UTCMay 23, 18:00 UTC40m
2026-05-23 FHNFC VAF → CEQ May 23, 16:10 UTCMay 23, 17:00 UTC50m
2026-05-22 FHNFC - May 22, 17:00 UTCMay 22, 17:40 UTC40m
2026-05-22 FHNFC VAF → CEQ May 22, 15:30 UTCMay 22, 16:25 UTC55m
2026-05-18 FHNFC DTM → VAF May 18, 14:05 UTCMay 18, 15:55 UTC1h 50m
2026-05-18 FHNFC VAF → DTM May 18, 05:05 UTCMay 18, 06:50 UTC1h 45m
2026-05-07 FHNFC - May 7, 09:45 UTCMay 7, 11:30 UTC1h 45m
2026-05-07 FHNFC - May 7, 04:55 UTCMay 7, 06:15 UTC1h 20m
2026-05-06 FHNFC - May 6, 15:00 UTCMay 6, 15:10 UTC10m
2026-05-06 FHNFC - May 6, 13:40 UTCMay 6, 14:25 UTC45m
2026-05-06 FHNFC - May 6, 11:10 UTCMay 6, 13:10 UTC2h 0m
2026-05-06 FHNFC - May 6, 07:01 UTCMay 6, 09:25 UTC2h 25m
2026-04-30 FHNFC - Apr 30, 13:10 UTCApr 30, 15:00 UTC1h 50m
2026-04-30 FHNFC - Apr 30, 12:20 UTCApr 30, 12:35 UTC15m
2026-04-30 FHNFC - Apr 30, 09:00 UTCApr 30, 11:10 UTC2h 10m
2026-04-30 FHNFC - Apr 30, 07:40 UTCApr 30, 07:50 UTC10m
2026-04-18 FHNFC - Apr 18, 16:15 UTCApr 18, 16:55 UTC40m
2026-04-18 FHNFC - Apr 18, 14:00 UTCApr 18, 15:45 UTC1h 45m
2026-04-18 FHNFC - Apr 18, 07:25 UTCApr 18, 07:45 UTC20m
2026-04-18 FHNFC - Apr 18, 06:10 UTCApr 18, 07:20 UTC1h 10m
2026-04-17 FHNFC - Apr 17, 12:05 UTCApr 17, 13:00 UTC55m
2026-04-16 FHNFC - Apr 16, 07:29 UTCApr 16, 08:15 UTC45m
2026-04-16 FHNFC - Apr 16, 06:29 UTCApr 16, 07:05 UTC35m
2026-04-15 FHNFC - Apr 15, 15:05 UTCApr 15, 15:55 UTC50m
2026-04-15 FHNFC - Apr 15, 14:05 UTCApr 15, 14:55 UTC49m
2026-04-15 FHNFC - Apr 15, 07:01 UTCApr 15, 08:05 UTC1h 4m
2026-04-15 FHNFC - Apr 15, 06:10 UTCApr 15, 06:55 UTC45m
2026-04-14 FHNFC - Apr 14, 12:50 UTCApr 14, 13:05 UTC15m
2026-04-14 FHNFC - Apr 14, 10:50 UTCApr 14, 12:45 UTC1h 55m
2026-04-14 FHNFC - Apr 14, 10:00 UTCApr 14, 11:05 UTC1h 5m
2026-04-13 FHNFC - Apr 13, 16:15 UTCApr 13, 16:25 UTC10m
2026-04-13 FHNFC - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 FHNFC - Apr 13, 09:10 UTCApr 13, 11:30 UTC2h 20m
2026-04-12 FHNFC - Apr 12, 19:20 UTCApr 12, 20:15 UTC55m
2026-04-12 FHNFC - Apr 12, 17:15 UTCApr 12, 18:20 UTC1h 5m

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 F-HNFC page for operator, model, and routing details .

Mode-S 39B4A2 frequently asked

What is Mode-S code 39B4A2?
39B4A2 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HNFC.
Where is Mode-S 39B4A2 registered?
Mode-S code 39B4A2 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39B4A2 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 39B4A2, octal 16332242, decimal 3,781,794.
What flights does 39B4A2 operate?
Mode-S 39B4A2 has broadcast 1 distinct callsign, including FHNFC.