Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 1h ago
Flights observed
125
Distinct callsigns
11
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 11 distinct

Callsign Airline Flights Last seen
FWI41D - 37 2026-07-13
FWI11B - 28 2026-07-14
FWI40J - 26 2026-07-08
FWI10A - 17 2026-07-13
FWI538 Air Caraïbes 5 2026-06-16
FWI17F - 5 2026-07-05
FWI46E - 3 2026-07-04
FWI71K Air Caraïbes 1 2026-04-25
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
2026-07-14 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
2026-06-27 FWI40J ORY → ORY Jun 27, 09:19 UTCJun 28, 04:29 UTC19h 10m
2026-06-22 FWI41D - Jun 22, 10:34 UTCJun 23, 04:35 UTC18h 0m
2026-06-22 FWI41D ORY → ORY Jun 22, 09:34 UTCJun 23, 04:35 UTC19h 0m
2026-06-21 FWI10A ORY → ORY Jun 21, 12:10 UTCJun 22, 06:10 UTC18h 0m
2026-06-20 FWI11B ORY → ORY Jun 20, 11:14 UTCJun 21, 05:44 UTC18h 30m
2026-06-19 FWI11B - Jun 19, 12:34 UTCJun 20, 06:39 UTC18h 5m
2026-06-19 FWI11B ORY → ORY Jun 19, 12:14 UTCJun 20, 06:39 UTC18h 25m
2026-06-18 FWI11B ORY → ORY Jun 18, 10:45 UTCJun 19, 05:09 UTC18h 24m
2026-06-17 FWI10A ORY → ORY Jun 17, 10:55 UTCJun 18, 05:10 UTC18h 15m
2026-06-16 FWI538 ORY → PTP Jun 16, 10:35 UTCJun 17, 06:05 UTC19h 31m
2026-06-16 FWI538 ORY → PTP Jun 16, 09:45 UTCJun 17, 06:05 UTC20h 21m
2026-06-15 FWI41D - Jun 15, 10:35 UTCJun 16, 04:45 UTC18h 10m
2026-06-15 FWI40J ORY → ORY Jun 15, 09:45 UTCJun 16, 04:45 UTC19h 0m
2026-06-14 FWI40J ORY → PTP Jun 14, 09:10 UTCJun 15, 04:20 UTC19h 10m
2026-06-13 FWI41D - Jun 13, 10:35 UTCJun 14, 05:40 UTC19h 5m
2026-06-13 FWI40J ORY → PTP Jun 13, 09:25 UTCJun 14, 05:40 UTC20h 15m
2026-06-11 FWI40J ORY → PTP Jun 11, 09:25 UTCJun 12, 04:20 UTC18h 56m
2026-06-10 FWI41D PTP → ORY Jun 10, 10:35 UTCJun 11, 05:00 UTC18h 25m
2026-06-10 FWI40J ORY → PTP Jun 10, 09:10 UTCJun 11, 05:00 UTC19h 50m
2026-06-09 FWI40J ORY → PTP Jun 9, 10:35 UTCJun 10, 05:25 UTC18h 50m

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 1h ago.
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 11 distinct callsigns, including FWI41D, FWI11B, FWI40J, FWI10A, FWI538.