Apparatus

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sensors Mode-S transponder

39B4E3

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HNHD · TECNAM P-2006T

Hex
39B4E3
Octal
16332343
Decimal
3,781,859
Country
FR
Tail
F-HNHD
Type
P06T
No current signal · last broadcast 6h ago
Flights observed
90
Distinct callsigns
20
Country
FR
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 39B4E3.

Country allocation

The ICAO 24-bit address 39B4E3 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 20 distinct

Callsign Airline Flights Last seen
FHNHD - 61 2026-07-21
MZY047B - 3 2026-07-20
MZY027A - 3 2026-06-22
MZY974 - 2 2026-05-20
MZY035B - 2 2026-05-19
MZY034A - 2 2026-07-20
MZY031B - 2 2026-07-02
MZY027B - 2 2026-06-29
MZY021A - 2 2026-07-08
MZY069A - 1 2026-06-30
MZY047C - 1 2026-07-17
MZY045B - 1 2026-07-08
MZY045A - 1 2026-07-07
MZY044B - 1 2026-05-28
MZY044 - 1 2026-05-27
MZY031A - 1 2026-07-02
MZY026 - 1 2026-07-02
MZY017B - 1 2026-06-05
MZY017A - 1 2026-06-05
MYZ047C - 1 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 FHNHD - Jul 21, 14:55 UTCJul 21, 15:00 UTC5m
2026-07-21 FHNHD TUF → TUF Jul 21, 13:00 UTCJul 21, 14:50 UTC1h 50m
2026-07-21 FHNHD TUF → TUF Jul 21, 08:00 UTCJul 21, 10:20 UTC2h 20m
2026-07-20 MZY047B - Jul 20, 18:50 UTCJul 20, 20:40 UTC1h 50m
2026-07-20 FHNHD - Jul 20, 16:20 UTCJul 20, 17:55 UTC1h 35m
2026-07-20 FHNHD - Jul 20, 14:00 UTCJul 20, 15:45 UTC1h 45m
2026-07-20 MZY034A TUF → TUF Jul 20, 11:05 UTCJul 20, 13:00 UTC1h 55m
2026-07-20 FHNHD TUF → TUF Jul 20, 08:00 UTCJul 20, 09:15 UTC1h 15m
2026-07-20 FHNHD - Jul 20, 06:25 UTCJul 20, 07:25 UTC1h 0m
2026-07-20 FHNHD - Jul 20, 04:50 UTCJul 20, 05:50 UTC1h 0m
2026-07-17 FHNHD TUF → TUF Jul 17, 15:00 UTCJul 17, 16:34 UTC1h 35m
2026-07-17 FHNHD TUF → TUF Jul 17, 11:55 UTCJul 17, 14:24 UTC2h 30m
2026-07-17 MZY047C TUF → TUF Jul 17, 08:20 UTCJul 17, 10:00 UTC1h 40m
2026-07-17 FHNHD - Jul 17, 06:45 UTCJul 17, 07:40 UTC55m
2026-07-17 FHNHD - Jul 17, 05:20 UTCJul 17, 06:00 UTC40m
2026-07-16 FHNHD TUF → TUF Jul 16, 12:34 UTCJul 16, 13:40 UTC1h 5m
2026-07-16 FHNHD - Jul 16, 09:50 UTCJul 16, 10:55 UTC1h 5m
2026-07-16 FHNHD TUF → TUF Jul 16, 07:20 UTCJul 16, 09:15 UTC1h 55m
2026-07-10 FHNHD - Jul 10, 12:30 UTCJul 10, 13:00 UTC30m
2026-07-10 FHNHD - Jul 10, 10:20 UTCJul 10, 11:10 UTC50m
2026-07-10 FHNHD - Jul 10, 08:25 UTCJul 10, 09:25 UTC1h 0m
2026-07-10 FHNHD - Jul 10, 06:15 UTCJul 10, 07:15 UTC1h 0m
2026-07-10 FHNHD - Jul 10, 04:50 UTCJul 10, 05:40 UTC50m
2026-07-09 MYZ047C - Jul 9, 16:25 UTCJul 9, 17:55 UTC1h 30m
2026-07-09 FHNHD TUF → TUF Jul 9, 14:50 UTCJul 9, 15:50 UTC1h 0m
2026-07-09 MZY034A - Jul 9, 10:10 UTCJul 9, 14:15 UTC4h 5m
2026-07-09 FHNHD - Jul 9, 07:05 UTCJul 9, 08:10 UTC1h 5m
2026-07-09 FHNHD - Jul 9, 06:05 UTCJul 9, 06:30 UTC25m
2026-07-08 MZY045B - Jul 8, 12:50 UTCJul 8, 14:00 UTC1h 10m
2026-07-08 FHNHD - Jul 8, 11:05 UTCJul 8, 12:00 UTC55m
2026-07-08 FHNHD - Jul 8, 09:35 UTCJul 8, 10:15 UTC40m
2026-07-08 FHNHD - Jul 8, 07:50 UTCJul 8, 08:40 UTC50m
2026-07-08 MZY021A TUF → TUF Jul 8, 05:05 UTCJul 8, 06:45 UTC1h 40m
2026-07-07 MZY045A - Jul 7, 19:20 UTCJul 7, 20:45 UTC1h 25m
2026-07-07 FHNHD - Jul 7, 09:00 UTCJul 7, 10:10 UTC1h 10m
2026-07-07 FHNHD - Jul 7, 07:15 UTCJul 7, 08:15 UTC1h 0m
2026-07-07 FHNHD - Jul 7, 06:25 UTCJul 7, 06:45 UTC20m
2026-07-07 FHNHD - Jul 7, 04:20 UTCJul 7, 04:55 UTC35m
2026-07-06 FHNHD - Jul 6, 12:55 UTCJul 6, 13:40 UTC45m
2026-07-06 MZY021A TUF → TUF Jul 6, 10:10 UTCJul 6, 11:40 UTC1h 30m
2026-07-06 FHNHD - Jul 6, 07:10 UTCJul 6, 07:40 UTC30m
2026-07-06 FHNHD - Jul 6, 05:25 UTCJul 6, 06:00 UTC35m
2026-07-03 MZY047B - Jul 3, 08:10 UTCJul 3, 08:45 UTC35m
2026-07-02 MZY031B - Jul 2, 16:55 UTCJul 2, 17:55 UTC1h 0m
2026-07-02 MZY031A - Jul 2, 15:15 UTCJul 2, 15:40 UTC25m
2026-07-02 MZY026 - Jul 2, 11:40 UTCJul 2, 13:10 UTC1h 30m
2026-07-01 FHNHD - Jul 1, 09:55 UTCJul 1, 11:40 UTC1h 45m
2026-07-01 MZY047B - Jul 1, 07:40 UTCJul 1, 08:15 UTC35m
2026-06-30 FHNHD - Jun 30, 14:10 UTCJun 30, 14:40 UTC30m
2026-06-30 FHNHD - Jun 30, 11:35 UTCJun 30, 12:25 UTC50m

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

Mode-S 39B4E3 frequently asked

What is Mode-S code 39B4E3?
39B4E3 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HNHD.
Where is Mode-S 39B4E3 registered?
Mode-S code 39B4E3 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39B4E3 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39B4E3, octal 16332343, decimal 3,781,859.
What flights does 39B4E3 operate?
Mode-S 39B4E3 has broadcast 20 distinct callsigns, including FHNHD, MZY047B, MZY027A, MZY974, MZY035B.