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
Transponder active on ground
Flights observed
60
Distinct callsigns
10
Country
FR
Last broadcast
1h ago

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 10 distinct

Callsign Airline Flights Last seen
FWI11B Air Caraïbes 19 2026-05-28
FWI41D Air Caraïbes 16 2026-05-26
FWI10A Air Caraïbes 10 2026-05-29
FWI40J Air Caraïbes 7 2026-05-23
FWI17F Air Caraïbes 3 2026-05-09
FWI71K Air Caraïbes 1 2026-04-25
FWI46E Air Caraïbes 1 2026-05-03
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
2026-05-29 FWI10A ORY → FDF May 29, 10:55 UTCMay 30, 04:30 UTC17h 35m
2026-05-28 FWI11B FDF → ORY May 28, 10:45 UTCMay 29, 05:40 UTC18h 55m
2026-05-27 FWI11B FDF → ORY May 27, 10:35 UTCMay 28, 05:20 UTC18h 45m
2026-05-26 FWI41D PTP → ORY May 26, 09:25 UTCMay 27, 04:30 UTC19h 5m
2026-05-25 FWI41D PTP → ORY May 25, 09:15 UTCMay 26, 04:24 UTC19h 9m
2026-05-24 FWI41D PTP → ORY May 24, 09:20 UTCMay 25, 04:25 UTC19h 5m
2026-05-23 FWI41D PTP → ORY May 23, 10:35 UTCMay 24, 04:45 UTC18h 11m
2026-05-23 FWI40J ORY → PTP May 23, 09:10 UTCMay 24, 04:45 UTC19h 36m
2026-05-22 FWI40J ORY → PTP May 22, 09:05 UTCMay 23, 04:10 UTC19h 4m
2026-05-21 FWI11B FDF → ORY May 21, 10:50 UTCMay 22, 05:40 UTC18h 50m
2026-05-20 FWI41D PTP → ORY May 20, 09:05 UTCMay 21, 04:30 UTC19h 25m
2026-05-19 FWI40J ORY → PTP May 19, 09:05 UTCMay 20, 04:25 UTC19h 20m
2026-05-18 FWI40J ORY → PTP May 18, 09:10 UTCMay 19, 04:10 UTC18h 59m
2026-05-17 FWI40J ORY → PTP May 17, 09:35 UTCMay 18, 04:25 UTC18h 50m
2026-05-16 FWI40J ORY → PTP May 16, 09:21 UTCMay 17, 04:30 UTC19h 10m
2026-05-15 FWI10A ORY → FDF May 15, 10:35 UTCMay 16, 05:40 UTC19h 4m
2026-05-14 FWI10A ORY → FDF May 14, 10:50 UTCMay 15, 06:05 UTC19h 15m
2026-05-13 FWI11B FDF → ORY May 13, 11:30 UTCMay 14, 06:25 UTC18h 55m
2026-05-11 FWI11B FDF → ORY May 11, 10:35 UTCMay 12, 05:40 UTC19h 6m
2026-05-10 FWI11B FDF → ORY May 10, 11:00 UTCMay 11, 05:45 UTC18h 45m
2026-05-09 FWI17F FDF → ORY May 9, 08:40 UTCMay 10, 04:29 UTC19h 50m
2026-05-08 FWI11B FDF → ORY May 8, 10:44 UTCMay 9, 05:05 UTC18h 20m
2026-05-07 FWI11B FDF → ORY May 7, 10:40 UTCMay 8, 05:14 UTC18h 35m
2026-05-06 FWI41D PTP → ORY May 6, 09:10 UTCMay 7, 04:15 UTC19h 4m
2026-05-05 FWI40J ORY → PTP May 5, 09:15 UTCMay 6, 04:15 UTC19h 0m
2026-05-04 FWI11B FDF → ORY May 4, 10:40 UTCMay 5, 05:55 UTC19h 16m
2026-05-04 FWI17F FDF → ORY May 4, 02:50 UTCMay 4, 04:34 UTC1h 45m
2026-05-03 FWI46E ORY → FDF May 3, 08:30 UTCMay 3, 09:40 UTC1h 10m
2026-05-02 FWI41D PTP → ORY May 2, 09:05 UTCMay 3, 04:30 UTC19h 24m
2026-05-01 FWI41D PTP → ORY May 1, 09:15 UTCMay 2, 04:15 UTC19h 0m
2026-04-30 FWI41D PTP → ORY Apr 30, 09:20 UTCMay 1, 04:10 UTC18h 50m
2026-04-29 FWI41D PTP → ORY Apr 29, 09:05 UTCApr 30, 04:15 UTC19h 9m
2026-04-29 FWI41D PTP → ORY Apr 29, 03:24 UTCApr 29, 04:49 UTC1h 25m
2026-04-28 FWI41D PTP → ORY Apr 28, 09:10 UTCApr 29, 04:49 UTC19h 40m
2026-04-27 FWI41D PTP → ORY Apr 27, 09:05 UTCApr 28, 04:20 UTC19h 15m
2026-04-26 FWI11B FDF → ORY Apr 26, 11:30 UTCApr 27, 06:00 UTC18h 30m
2026-04-25 FWI71K FDF → ORY Apr 25, 14:35 UTCApr 26, 08:50 UTC18h 15m
2026-04-25 FWI14J ORY → FDF Apr 25, 14:00 UTCApr 26, 08:50 UTC18h 50m
2026-04-25 FBU92K EWR → ORY Apr 25, 04:40 UTCApr 25, 11:20 UTC6h 40m
2026-04-24 FBU72J ORY → EWR Apr 24, 19:15 UTCApr 25, 02:05 UTC6h 50m
2026-04-24 FWI11B FDF → ORY Apr 24, 04:10 UTCApr 24, 05:40 UTC1h 30m
2026-04-23 FWI10A ORY → FDF Apr 23, 10:50 UTCApr 23, 12:15 UTC1h 25m
2026-04-22 FWI10A ORY → FDF Apr 22, 10:40 UTCApr 23, 05:15 UTC18h 35m
2026-04-21 FWI41D PTP → ORY Apr 21, 09:05 UTCApr 22, 04:10 UTC19h 5m
2026-04-20 FWI17F FDF → ORY Apr 20, 08:40 UTCApr 21, 04:05 UTC19h 25m
2026-04-19 FWI41D PTP → ORY Apr 19, 09:05 UTCApr 20, 04:05 UTC19h 0m
2026-04-18 FWI41D PTP → ORY Apr 18, 09:25 UTCApr 19, 04:30 UTC19h 5m
2026-04-18 FWI11B FDF → ORY Apr 18, 04:45 UTCApr 18, 05:25 UTC40m
2026-04-18 FWI11B FDF → ORY Apr 18, 04:05 UTCApr 18, 05:20 UTC1h 15m
2026-04-17 FWI10A ORY → FDF Apr 17, 11:20 UTCApr 17, 11:55 UTC35m

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?
Mode-S 39C912 is currently broadcasting from the ground.
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 10 distinct callsigns, including FWI11B, FWI41D, FWI10A, FWI40J, FWI17F.