Apparatus

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sensors Mode-S transponder

39C912

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HSIS · AIRBUS A-350-1000

Hex
39C912
Octal
16344422
Decimal
3,787,026
Country
FR
Tail
F-HSIS
Type
A35K
No current signal · last broadcast Jul 26, 20:45 UTC
Flights observed
145
Distinct callsigns
14
Country
FR
Last broadcast
Jul 26, 20:45 UTC

Last known position

Most recent position reported by Mode-S 39C912.

Country allocation

The ICAO 24-bit address 39C912 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 14 distinct

Callsign Airline Flights Last seen
FWI41D Air Caraïbes 49 2026-07-25
FWI11B - 28 2026-07-14
FWI40J - 27 2026-07-15
FWI10A - 17 2026-07-13
FWI17F Air Caraïbes 6 2026-07-26
FWI538 Air Caraïbes 5 2026-06-16
FWI46E Air Caraïbes 5 2026-07-26
FWI51W Air Caraïbes 2 2026-07-22
FWI71K Air Caraïbes 1 2026-04-25
FWI57Q Air Caraïbes 1 2026-07-21
FWI5641 Air Caraïbes 1 2026-07-18
FWI14J Air Caraïbes 1 2026-04-25
FBU92K French Bee 1 2026-04-25
FBU72J French Bee 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FWI17F FDF → ORY Jul 26, 20:35 UTCJul 26, 20:45 UTC10m
2026-07-26 FWI46E ORY → FDF Jul 26, 16:25 UTCJul 26, 16:40 UTC15m
2026-07-26 FWI46E ORY → FDF Jul 26, 08:40 UTCJul 26, 09:55 UTC1h 15m
2026-07-25 FWI41D PTP → ORY Jul 25, 10:35 UTCJul 26, 05:00 UTC18h 25m
2026-07-25 FWI41D PTP → ORY Jul 25, 10:00 UTCJul 26, 05:00 UTC19h 0m
2026-07-24 FWI41D PTP → ORY Jul 24, 09:30 UTCJul 25, 04:25 UTC18h 55m
2026-07-23 FWI41D PTP → ORY Jul 23, 09:45 UTCJul 24, 04:15 UTC18h 30m
2026-07-22 FWI41D PTP → ORY Jul 22, 10:20 UTCJul 23, 04:15 UTC17h 55m
2026-07-22 FWI41D PTP → ORY Jul 22, 04:35 UTCJul 23, 04:15 UTC23h 40m
2026-07-22 FWI51W CAY → ORY Jul 22, 04:20 UTCJul 22, 10:25 UTC6h 5m
2026-07-21 FWI51W CAY → ORY Jul 21, 12:35 UTCJul 22, 10:25 UTC21h 50m
2026-07-21 FWI57Q ORY → CAY Jul 21, 11:40 UTCJul 22, 10:25 UTC22h 45m
2026-07-20 FWI41D PTP → ORY Jul 20, 09:15 UTCJul 21, 04:30 UTC19h 14m
2026-07-19 FWI41D PTP → ORY Jul 19, 10:35 UTCJul 20, 04:40 UTC18h 5m
2026-07-19 FWI41D PTP → ORY Jul 19, 09:35 UTCJul 20, 04:40 UTC19h 5m
2026-07-18 FWI41D PTP → ORY Jul 18, 12:35 UTCJul 19, 06:45 UTC18h 10m
2026-07-18 FWI41D PTP → ORY Jul 18, 12:00 UTCJul 19, 06:45 UTC18h 45m
2026-07-18 FWI5641 PTP → ORY Jul 18, 07:20 UTCJul 18, 08:45 UTC1h 25m
2026-07-15 FWI40J - Jul 15, 09:30 UTCJul 15, 10:35 UTC1h 5m
2026-07-14 FWI41D ORY → ORY Jul 14, 09:35 UTCJul 15, 04:15 UTC18h 39m
2026-07-14 FWI11B - Jul 14, 04:20 UTCJul 14, 05:45 UTC1h 25m
2026-07-13 FWI10A - Jul 13, 10:55 UTCJul 13, 12:00 UTC1h 5m
2026-07-13 FWI41D - Jul 13, 02:40 UTCJul 13, 04:35 UTC1h 55m
2026-07-12 FWI41D ORY → ORY Jul 12, 09:20 UTCJul 13, 04:35 UTC19h 15m
2026-07-11 FWI11B ORY → ORY Jul 11, 11:10 UTCJul 12, 05:45 UTC18h 35m
2026-07-11 FWI41D - Jul 11, 03:35 UTCJul 11, 04:55 UTC1h 20m
2026-07-10 FWI41D ORY → ORY Jul 10, 09:15 UTCJul 11, 04:55 UTC19h 40m
2026-07-09 FWI41D - Jul 9, 10:35 UTCJul 10, 05:00 UTC18h 25m
2026-07-09 FWI41D ORY → ORY Jul 9, 09:40 UTCJul 10, 05:00 UTC19h 20m
2026-07-08 FWI41D - Jul 8, 10:35 UTCJul 9, 06:05 UTC19h 30m
2026-07-08 FWI40J ORY → ORY Jul 8, 09:35 UTCJul 9, 06:05 UTC20h 30m
2026-07-07 FWI41D - Jul 7, 10:35 UTCJul 8, 04:35 UTC18h 0m
2026-07-07 FWI41D ORY → ORY Jul 7, 09:30 UTCJul 8, 04:35 UTC19h 5m
2026-07-06 FWI41D ORY → ORY Jul 6, 11:15 UTCJul 7, 05:15 UTC18h 0m
2026-07-06 FWI11B - Jul 6, 03:30 UTCJul 6, 05:35 UTC2h 5m
2026-07-05 FWI10A - Jul 5, 11:20 UTCJul 5, 12:45 UTC1h 25m
2026-07-05 FWI17F - Jul 5, 02:45 UTCJul 5, 04:15 UTC1h 30m
2026-07-04 FWI46E - Jul 4, 08:50 UTCJul 4, 10:15 UTC1h 25m
2026-07-04 FWI17F - Jul 4, 02:45 UTCJul 4, 04:15 UTC1h 30m
2026-07-03 FWI46E - Jul 3, 08:55 UTCJul 3, 10:20 UTC1h 25m
2026-07-02 FWI41D - Jul 2, 10:35 UTCJul 3, 04:45 UTC18h 10m
2026-07-02 FWI41D ORY → ORY Jul 2, 09:20 UTCJul 3, 04:45 UTC19h 25m
2026-07-01 FWI41D - Jul 1, 10:35 UTCJul 2, 04:35 UTC18h 0m
2026-07-01 FWI40J ORY → ORY Jul 1, 09:25 UTCJul 2, 04:35 UTC19h 10m
2026-06-30 FWI41D - Jun 30, 10:35 UTCJul 1, 04:40 UTC18h 5m
2026-06-30 FWI40J ORY → ORY Jun 30, 09:30 UTCJul 1, 04:40 UTC19h 10m
2026-06-30 FWI11B - Jun 30, 04:10 UTCJun 30, 05:30 UTC1h 20m
2026-06-29 FWI10A - Jun 29, 10:55 UTCJun 29, 12:24 UTC1h 30m
2026-06-29 FWI11B - Jun 29, 04:45 UTCJun 29, 05:50 UTC1h 5m
2026-06-28 FWI10A - Jun 28, 11:14 UTCJun 28, 12:19 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-HSIS page for operator, model, and routing details .

Mode-S 39C912 frequently asked

What is Mode-S code 39C912?
39C912 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HSIS.
Where is Mode-S 39C912 registered?
Mode-S code 39C912 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39C912 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39C912, octal 16344422, decimal 3,787,026.
What flights does 39C912 operate?
Mode-S 39C912 has broadcast 14 distinct callsigns, including FWI41D, FWI11B, FWI40J, FWI10A, FWI17F.