Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

39CDCE

ICAO 24-bit transponder address · allocated to France

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

Hex
39CDCE
Octal
16346716
Decimal
3,788,238
Country
FR
Tail
F-HTOO
Type
A35K
No current signal · last broadcast 1h ago
Flights observed
131
Distinct callsigns
10
Country
FR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 39CDCE.

Country allocation

The ICAO 24-bit address 39CDCE 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
FWI41D - 52 2026-07-14
FWI11B - 22 2026-07-11
FWI40J - 18 2026-07-13
FWI10A - 18 2026-07-10
FWI57Q - 5 2026-07-09
FWI17F - 5 2026-07-13
FWI537 Air Caraïbes 4 2026-04-18
FWI538 Air Caraïbes 3 2026-06-13
FWI46E - 3 2026-07-12
FWI5617 Air Caraïbes 1 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FWI41D - Jul 14, 04:50 UTCJul 14, 05:30 UTC40m
2026-07-13 FWI40J - Jul 13, 09:25 UTCJul 13, 10:35 UTC1h 10m
2026-07-13 FWI17F - Jul 13, 02:15 UTCJul 13, 04:10 UTC1h 55m
2026-07-12 FWI46E - Jul 12, 09:20 UTCJul 12, 10:25 UTC1h 5m
2026-07-11 FWI41D - Jul 11, 09:35 UTCJul 12, 04:25 UTC18h 50m
2026-07-11 FWI11B - Jul 11, 03:55 UTCJul 11, 05:15 UTC1h 20m
2026-07-10 FWI10A - Jul 10, 10:45 UTCJul 10, 12:10 UTC1h 25m
2026-07-09 FWI57Q ORY → ORY Jul 9, 11:50 UTCJul 10, 06:45 UTC18h 55m
2026-07-08 FWI57Q - Jul 8, 12:35 UTCJul 9, 07:05 UTC18h 30m
2026-07-07 FWI17F ORY → ORY Jul 7, 09:25 UTCJul 8, 04:30 UTC19h 5m
2026-07-07 FWI17F - Jul 7, 03:40 UTCJul 7, 05:40 UTC2h 0m
2026-07-06 FWI17F ORY → ORY Jul 6, 09:45 UTCJul 7, 05:40 UTC19h 55m
2026-07-05 FWI41D ORY → ORY Jul 5, 09:35 UTCJul 6, 04:35 UTC19h 0m
2026-07-04 FWI41D - Jul 4, 09:35 UTCJul 5, 05:25 UTC19h 50m
2026-07-03 FWI40J ORY → ORY Jul 3, 11:05 UTCJul 4, 05:25 UTC18h 20m
2026-07-02 FWI11B - Jul 2, 13:35 UTCJul 3, 07:40 UTC18h 5m
2026-07-02 FWI10A - Jul 2, 12:45 UTCJul 3, 07:40 UTC18h 55m
2026-06-29 FWI41D - Jun 29, 09:34 UTCJun 30, 04:15 UTC18h 41m
2026-06-29 FWI40J ORY → ORY Jun 29, 09:25 UTCJun 30, 04:15 UTC18h 51m
2026-06-28 FWI41D - Jun 28, 09:34 UTCJun 29, 04:04 UTC18h 30m
2026-06-28 FWI40J ORY → ORY Jun 28, 09:25 UTCJun 29, 04:04 UTC18h 40m
2026-06-27 FWI17F - Jun 27, 09:34 UTCJun 28, 05:09 UTC19h 35m
2026-06-27 FWI46E ORY → ORY Jun 27, 09:04 UTCJun 28, 05:09 UTC20h 5m
2026-06-26 FWI41D - Jun 26, 09:35 UTCJun 27, 05:29 UTC19h 55m
2026-06-25 FWI11B - Jun 25, 11:35 UTCJun 26, 05:39 UTC18h 5m
2026-06-25 FWI11B ORY → ORY Jun 25, 10:55 UTCJun 26, 05:39 UTC18h 45m
2026-06-24 FWI41D ORY → ORY Jun 24, 10:35 UTCJun 25, 04:45 UTC18h 10m
2026-06-23 FWI41D - Jun 23, 09:34 UTCJun 24, 04:24 UTC18h 50m
2026-06-23 FWI40J ORY → ORY Jun 23, 09:20 UTCJun 24, 04:24 UTC19h 5m
2026-06-22 FWI10A ORY → ORY Jun 22, 10:44 UTCJun 23, 05:09 UTC18h 25m
2026-06-21 FWI40J - Jun 21, 09:35 UTCJun 22, 04:15 UTC18h 40m
2026-06-21 FWI40J ORY → ORY Jun 21, 09:24 UTCJun 22, 04:15 UTC18h 50m
2026-06-20 FWI41D - Jun 20, 09:34 UTCJun 21, 04:24 UTC18h 50m
2026-06-20 FWI41D ORY → ORY Jun 20, 09:14 UTCJun 21, 04:24 UTC19h 10m
2026-06-19 FWI41D ORY → ORY Jun 19, 09:59 UTCJun 20, 04:29 UTC18h 30m
2026-06-18 FWI41D - Jun 18, 09:35 UTCJun 19, 04:39 UTC19h 4m
2026-06-17 FWI41D - Jun 17, 09:35 UTCJun 18, 04:45 UTC19h 10m
2026-06-17 FWI40J ORY → ORY Jun 17, 09:20 UTCJun 18, 04:45 UTC19h 25m
2026-06-15 FWI10A ORY → ORY Jun 15, 12:19 UTCJun 16, 07:09 UTC18h 50m
2026-06-14 FWI10A ORY → ORY Jun 14, 10:40 UTCJun 15, 05:30 UTC18h 50m
2026-06-13 FWI11B - Jun 13, 11:35 UTCJun 14, 06:30 UTC18h 56m
2026-06-13 FWI538 ORY → PTP Jun 13, 04:30 UTCJun 13, 06:05 UTC1h 35m
2026-06-12 FWI538 ORY → PTP Jun 12, 09:35 UTCJun 13, 06:05 UTC20h 29m
2026-06-12 FWI538 ORY → PTP Jun 12, 09:20 UTCJun 13, 06:05 UTC20h 44m
2026-06-11 FWI10A ORY → FDF Jun 11, 10:40 UTCJun 12, 05:25 UTC18h 46m
2026-06-10 FWI10A ORY → FDF Jun 10, 10:40 UTCJun 11, 05:15 UTC18h 35m
2026-06-07 FWI11B FDF → ORY Jun 7, 11:35 UTCJun 8, 05:35 UTC18h 0m
2026-06-07 FWI10A ORY → FDF Jun 7, 10:50 UTCJun 8, 05:35 UTC18h 45m
2026-06-06 FWI10A ORY → FDF Jun 6, 10:50 UTCJun 7, 05:10 UTC18h 20m
2026-06-05 FWI10A ORY → FDF Jun 5, 10:35 UTCJun 6, 05:10 UTC18h 35m

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

Mode-S 39CDCE frequently asked

What is Mode-S code 39CDCE?
39CDCE is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTOO.
Where is Mode-S 39CDCE registered?
Mode-S code 39CDCE is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CDCE 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 39CDCE, octal 16346716, decimal 3,788,238.
What flights does 39CDCE operate?
Mode-S 39CDCE has broadcast 10 distinct callsigns, including FWI41D, FWI11B, FWI40J, FWI10A, FWI57Q.