Apparatus

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sensors Mode-S transponder

39CD4E

ICAO 24-bit transponder address · allocated to France

Hex
39CD4E
Octal
16346516
Decimal
3,788,110
Country
FR
No current signal · last broadcast 1d ago
Flights observed
106
Distinct callsigns
5
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 39CD4E.

Country allocation

The ICAO 24-bit address 39CD4E 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 5 distinct

Callsign Airline Flights Last seen
SAMU63 - 67 2026-07-10
SAMU42 - 28 2026-04-21
FHTKO - 8 2026-07-16
SAMUCON - 1 2026-07-12
SAMU - 1 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 FHTKO - Jul 16, 15:00 UTCJul 16, 15:25 UTC25m
2026-07-16 FHTKO - Jul 16, 12:25 UTCJul 16, 14:20 UTC1h 55m
2026-07-16 FHTKO - Jul 16, 09:25 UTCJul 16, 10:59 UTC1h 35m
2026-07-16 FHTKO - Jul 16, 07:20 UTCJul 16, 08:50 UTC1h 30m
2026-07-15 FHTKO - Jul 15, 10:15 UTCJul 15, 11:35 UTC1h 20m
2026-07-15 FHTKO - Jul 15, 07:40 UTCJul 15, 09:10 UTC1h 30m
2026-07-12 SAMUCON - Jul 12, 11:45 UTCJul 12, 12:20 UTC35m
2026-07-12 SAMU - Jul 12, 10:45 UTCJul 12, 11:10 UTC25m
2026-07-10 SAMU63 - Jul 10, 16:00 UTCJul 10, 16:20 UTC20m
2026-07-10 SAMU63 - Jul 10, 14:10 UTCJul 10, 14:30 UTC20m
2026-07-10 SAMU63 - Jul 10, 11:05 UTCJul 10, 11:20 UTC15m
2026-07-10 SAMU63 - Jul 10, 08:10 UTCJul 10, 08:25 UTC15m
2026-07-09 SAMU63 - Jul 9, 12:50 UTCJul 9, 13:00 UTC10m
2026-07-08 SAMU63 - Jul 8, 15:10 UTCJul 8, 15:35 UTC25m
2026-07-08 SAMU63 - Jul 8, 14:05 UTCJul 8, 14:25 UTC20m
2026-07-07 SAMU63 - Jul 7, 15:50 UTCJul 7, 16:05 UTC15m
2026-07-07 SAMU63 - Jul 7, 14:50 UTCJul 7, 15:20 UTC30m
2026-07-07 SAMU63 - Jul 7, 13:45 UTCJul 7, 13:55 UTC10m
2026-07-07 SAMU63 - Jul 7, 12:35 UTCJul 7, 13:00 UTC25m
2026-07-07 SAMU63 - Jul 7, 11:20 UTCJul 7, 11:30 UTC10m
2026-07-07 SAMU63 - Jul 7, 10:25 UTCJul 7, 10:40 UTC15m
2026-07-06 SAMU63 - Jul 6, 15:15 UTCJul 6, 15:30 UTC15m
2026-07-06 SAMU63 - Jul 6, 14:10 UTCJul 6, 14:20 UTC10m
2026-07-06 SAMU63 - Jul 6, 11:40 UTCJul 6, 11:55 UTC15m
2026-07-06 SAMU63 - Jul 6, 10:30 UTCJul 6, 10:45 UTC15m
2026-07-05 SAMU63 - Jul 5, 18:05 UTCJul 5, 18:15 UTC10m
2026-07-05 SAMU63 - Jul 5, 13:50 UTCJul 5, 14:00 UTC10m
2026-07-03 SAMU63 - Jul 3, 16:10 UTCJul 3, 16:35 UTC25m
2026-07-02 SAMU63 - Jul 2, 15:40 UTCJul 2, 15:55 UTC15m
2026-07-02 SAMU63 - Jul 2, 14:00 UTCJul 2, 14:20 UTC20m
2026-07-02 SAMU63 - Jul 2, 12:30 UTCJul 2, 12:45 UTC15m
2026-07-02 SAMU63 - Jul 2, 10:50 UTCJul 2, 11:05 UTC15m
2026-07-01 SAMU63 - Jul 1, 16:50 UTCJul 1, 17:05 UTC15m
2026-07-01 SAMU63 - Jul 1, 14:05 UTCJul 1, 14:15 UTC10m
2026-07-01 SAMU63 - Jul 1, 11:05 UTCJul 1, 11:15 UTC10m
2026-07-01 SAMU63 - Jul 1, 10:10 UTCJul 1, 10:20 UTC10m
2026-06-30 SAMU63 - Jun 30, 12:40 UTCJun 30, 12:50 UTC10m
2026-06-30 SAMU63 - Jun 30, 11:45 UTCJun 30, 11:55 UTC10m
2026-06-29 SAMU63 - Jun 29, 12:55 UTCJun 29, 13:09 UTC15m
2026-06-29 SAMU63 - Jun 29, 11:55 UTCJun 29, 12:05 UTC10m
2026-06-29 SAMU63 - Jun 29, 10:44 UTCJun 29, 10:55 UTC10m
2026-06-29 SAMU63 - Jun 29, 08:50 UTCJun 29, 09:14 UTC25m
2026-06-29 SAMU63 - Jun 29, 07:40 UTCJun 29, 07:50 UTC10m
2026-06-27 SAMU63 - Jun 27, 17:34 UTCJun 27, 18:04 UTC30m
2026-06-27 SAMU63 - Jun 27, 16:30 UTCJun 27, 16:44 UTC15m
2026-06-27 SAMU63 - Jun 27, 12:55 UTCJun 27, 13:35 UTC40m
2026-06-27 SAMU63 - Jun 27, 11:44 UTCJun 27, 11:59 UTC15m
2026-06-26 SAMU63 - Jun 26, 16:05 UTCJun 26, 16:30 UTC25m
2026-06-26 - - Jun 26, 14:55 UTCJun 26, 15:05 UTC10m
2026-06-17 SAMU63 - Jun 17, 17:20 UTCJun 17, 17:45 UTC25m

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 39CD4E frequently asked

What is Mode-S code 39CD4E?
39CD4E is an ICAO 24-bit transponder address. Allocated to France.
Where is Mode-S 39CD4E registered?
Mode-S code 39CD4E is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CD4E broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CD4E, octal 16346516, decimal 3,788,110.
What flights does 39CD4E operate?
Mode-S 39CD4E has broadcast 5 distinct callsigns, including SAMU63, SAMU42, FHTKO, SAMUCON, SAMU.