Apparatus

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sensors Mode-S transponder

39DC43

ICAO 24-bit transponder address · allocated to France

Hex
39DC43
Octal
16356103
Decimal
3,791,939
Country
FR
No current signal · last broadcast 2d ago
Flights observed
148
Distinct callsigns
1
Country
FR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 39DC43.

Country allocation

The ICAO 24-bit address 39DC43 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 1 distinct

Callsign Airline Flights Last seen
FHXCD - 148 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 FHXCD - Jul 25, 08:15 UTCJul 25, 09:40 UTC1h 25m
2026-07-25 FHXCD - Jul 25, 06:10 UTCJul 25, 07:15 UTC1h 5m
2026-07-25 FHXCD - Jul 25, 05:15 UTCJul 25, 05:35 UTC20m
2026-07-23 FHXCD - Jul 23, 09:40 UTCJul 23, 11:45 UTC2h 5m
2026-07-21 FHXCD - Jul 21, 10:45 UTCJul 21, 13:45 UTC3h 0m
2026-07-21 FHXCD - Jul 21, 07:45 UTCJul 21, 10:00 UTC2h 15m
2026-07-21 FHXCD - Jul 21, 04:15 UTCJul 21, 06:25 UTC2h 10m
2026-07-20 FHXCD - Jul 20, 14:20 UTCJul 20, 15:50 UTC1h 30m
2026-07-20 FHXCD - Jul 20, 10:45 UTCJul 20, 13:00 UTC2h 15m
2026-07-20 FHXCD - Jul 20, 04:45 UTCJul 20, 08:15 UTC3h 30m
2026-07-18 FHXCD - Jul 18, 10:50 UTCJul 18, 11:30 UTC40m
2026-07-18 FHXCD - Jul 18, 09:50 UTCJul 18, 10:10 UTC20m
2026-07-18 FHXCD - Jul 18, 08:00 UTCJul 18, 09:20 UTC1h 20m
2026-07-18 FHXCD - Jul 18, 04:30 UTCJul 18, 07:00 UTC2h 30m
2026-07-17 FHXCD - Jul 17, 12:25 UTCJul 17, 13:35 UTC1h 10m
2026-07-16 FHXCD - Jul 16, 09:40 UTCJul 16, 11:30 UTC1h 50m
2026-07-16 FHXCD - Jul 16, 05:05 UTCJul 16, 07:10 UTC2h 5m
2026-07-15 FHXCD - Jul 15, 13:35 UTCJul 15, 16:10 UTC2h 35m
2026-07-15 FHXCD - Jul 15, 11:45 UTCJul 15, 12:00 UTC15m
2026-07-15 FHXCD - Jul 15, 10:15 UTCJul 15, 10:25 UTC10m
2026-07-15 FHXCD - Jul 15, 04:30 UTCJul 15, 07:45 UTC3h 15m
2026-07-14 FHXCD - Jul 14, 15:05 UTCJul 14, 16:05 UTC1h 0m
2026-07-14 FHXCD - Jul 14, 12:50 UTCJul 14, 13:00 UTC10m
2026-07-14 FHXCD - Jul 14, 10:35 UTCJul 14, 11:55 UTC1h 20m
2026-07-14 FHXCD - Jul 14, 07:30 UTCJul 14, 09:25 UTC1h 55m
2026-07-14 FHXCD - Jul 14, 05:55 UTCJul 14, 06:05 UTC10m
2026-07-14 FHXCD - Jul 14, 04:30 UTCJul 14, 05:05 UTC35m
2026-07-13 FHXCD - Jul 13, 09:10 UTCJul 13, 09:55 UTC45m
2026-07-13 FHXCD - Jul 13, 04:25 UTCJul 13, 05:05 UTC40m
2026-07-11 FHXCD - Jul 11, 11:05 UTCJul 11, 11:40 UTC35m
2026-07-11 FHXCD - Jul 11, 04:45 UTCJul 11, 08:25 UTC3h 40m
2026-07-10 FHXCD - Jul 10, 16:00 UTCJul 10, 16:15 UTC15m
2026-07-10 FHXCD - Jul 10, 14:20 UTCJul 10, 15:05 UTC45m
2026-07-10 FHXCD - Jul 10, 05:20 UTCJul 10, 09:35 UTC4h 15m
2026-07-09 FHXCD - Jul 9, 16:45 UTCJul 9, 16:55 UTC10m
2026-07-09 FHXCD - Jul 9, 04:20 UTCJul 9, 04:40 UTC20m
2026-07-08 FHXCD - Jul 8, 13:35 UTCJul 8, 16:10 UTC2h 35m
2026-07-08 FHXCD - Jul 8, 10:15 UTCJul 8, 12:40 UTC2h 25m
2026-07-08 FHXCD - Jul 8, 07:20 UTCJul 8, 08:50 UTC1h 30m
2026-07-08 FHXCD - Jul 8, 05:05 UTCJul 8, 05:15 UTC10m
2026-07-07 FHXCD - Jul 7, 10:45 UTCJul 7, 11:15 UTC30m
2026-07-07 FHXCD - Jul 7, 06:25 UTCJul 7, 08:05 UTC1h 40m
2026-07-07 FHXCD - Jul 7, 04:40 UTCJul 7, 05:55 UTC1h 15m
2026-07-06 FHXCD - Jul 6, 15:05 UTCJul 6, 17:15 UTC2h 10m
2026-07-06 FHXCD - Jul 6, 13:25 UTCJul 6, 14:25 UTC1h 0m
2026-07-06 FHXCD - Jul 6, 10:15 UTCJul 6, 12:25 UTC2h 10m
2026-07-06 FHXCD - Jul 6, 07:15 UTCJul 6, 08:25 UTC1h 10m
2026-07-04 FHXCD - Jul 4, 04:40 UTCJul 4, 07:20 UTC2h 40m
2026-07-03 FHXCD - Jul 3, 08:15 UTCJul 3, 10:00 UTC1h 45m
2026-07-03 FHXCD - Jul 3, 04:35 UTCJul 3, 06:55 UTC2h 20m

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.

Mode-S 39DC43 frequently asked

What is Mode-S code 39DC43?
39DC43 is an ICAO 24-bit transponder address. Allocated to France.
Where is Mode-S 39DC43 registered?
Mode-S code 39DC43 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39DC43 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39DC43, octal 16356103, decimal 3,791,939.
What flights does 39DC43 operate?
Mode-S 39DC43 has broadcast 1 distinct callsign, including FHXCD.