Apparatus

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sensors Mode-S transponder

39CA81

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HSUB · AIRBUS HELICOPTERS EC-145

Hex
39CA81
Octal
16345201
Decimal
3,787,393
Country
FR
Tail
F-HSUB
Type
EC45
No current signal · last broadcast 14h ago
Flights observed
258
Distinct callsigns
1
Country
FR
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 39CA81.

Country allocation

The ICAO 24-bit address 39CA81 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
SAMU49 - 258 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SAMU49 - Jul 13, 12:30 UTCJul 13, 12:40 UTC10m
2026-07-13 SAMU49 - Jul 13, 10:30 UTCJul 13, 10:40 UTC10m
2026-07-13 SAMU49 - Jul 13, 05:10 UTCJul 13, 05:40 UTC30m
2026-07-13 SAMU49 - Jul 13, 04:10 UTCJul 13, 04:35 UTC25m
2026-07-12 SAMU49 - Jul 12, 13:15 UTCJul 12, 13:30 UTC15m
2026-07-11 SAMU49 - Jul 11, 09:05 UTCJul 11, 09:25 UTC20m
2026-07-11 SAMU49 - Jul 11, 07:50 UTCJul 11, 08:05 UTC15m
2026-07-11 SAMU49 - Jul 11, 06:30 UTCJul 11, 06:40 UTC10m
2026-07-11 SAMU49 - Jul 11, 05:35 UTCJul 11, 05:50 UTC15m
2026-07-10 SAMU49 - Jul 10, 23:50 UTCJul 11, 00:05 UTC15m
2026-07-10 SAMU49 - Jul 10, 23:00 UTCJul 10, 23:15 UTC15m
2026-07-10 SAMU49 - Jul 10, 21:10 UTCJul 10, 21:25 UTC15m
2026-07-10 SAMU49 - Jul 10, 19:55 UTCJul 10, 20:10 UTC15m
2026-07-10 SAMU49 - Jul 10, 14:45 UTCJul 10, 14:55 UTC10m
2026-07-10 SAMU49 - Jul 10, 11:25 UTCJul 10, 11:45 UTC20m
2026-07-10 SAMU49 - Jul 10, 10:00 UTCJul 10, 10:25 UTC25m
2026-07-10 SAMU49 - Jul 10, 07:30 UTCJul 10, 07:40 UTC10m
2026-07-10 SAMU49 - Jul 10, 06:05 UTCJul 10, 06:15 UTC10m
2026-07-10 SAMU49 - Jul 10, 03:35 UTCJul 10, 03:55 UTC20m
2026-07-10 SAMU49 - Jul 10, 01:40 UTCJul 10, 02:05 UTC25m
2026-07-10 SAMU49 - Jul 10, 00:05 UTCJul 10, 00:30 UTC25m
2026-07-09 SAMU49 - Jul 9, 22:45 UTCJul 9, 23:15 UTC30m
2026-07-08 SAMU49 - Jul 8, 15:50 UTCJul 8, 16:00 UTC10m
2026-07-07 SAMU49 - Jul 7, 17:00 UTCJul 7, 17:10 UTC10m
2026-07-07 SAMU49 - Jul 7, 16:00 UTCJul 7, 16:15 UTC15m
2026-07-07 SAMU49 - Jul 7, 12:35 UTCJul 7, 14:00 UTC1h 25m
2026-07-06 SAMU49 - Jul 6, 19:15 UTCJul 6, 20:35 UTC1h 20m
2026-07-05 SAMU49 - Jul 5, 17:50 UTCJul 5, 18:00 UTC10m
2026-07-05 SAMU49 - Jul 5, 16:50 UTCJul 5, 17:00 UTC10m
2026-07-04 SAMU49 - Jul 4, 15:15 UTCJul 4, 15:30 UTC15m
2026-07-04 SAMU49 - Jul 4, 13:25 UTCJul 4, 13:50 UTC25m
2026-07-04 SAMU49 - Jul 4, 10:35 UTCJul 4, 10:45 UTC10m
2026-07-04 SAMU49 - Jul 4, 09:25 UTCJul 4, 09:35 UTC10m
2026-07-04 SAMU49 - Jul 4, 07:25 UTCJul 4, 08:15 UTC50m
2026-07-03 SAMU49 - Jul 3, 16:15 UTCJul 3, 16:35 UTC20m
2026-07-03 SAMU49 - Jul 3, 15:25 UTCJul 3, 15:40 UTC15m
2026-07-02 SAMU49 - Jul 2, 17:20 UTCJul 2, 17:30 UTC10m
2026-07-02 SAMU49 - Jul 2, 16:25 UTCJul 2, 16:35 UTC10m
2026-07-01 SAMU49 - Jul 1, 11:20 UTCJul 1, 11:50 UTC30m
2026-07-01 SAMU49 - Jul 1, 10:20 UTCJul 1, 10:35 UTC15m
2026-07-01 SAMU49 - Jul 1, 08:05 UTCJul 1, 09:45 UTC1h 40m
2026-07-01 SAMU49 - Jul 1, 06:45 UTCJul 1, 07:00 UTC15m
2026-07-01 SAMU49 - Jul 1, 05:30 UTCJul 1, 05:45 UTC15m
2026-06-30 SAMU49 - Jun 30, 17:05 UTCJun 30, 17:15 UTC10m
2026-06-30 SAMU49 - Jun 30, 16:10 UTCJun 30, 16:25 UTC15m
2026-06-30 SAMU49 - Jun 30, 13:15 UTCJun 30, 13:35 UTC20m
2026-06-30 SAMU49 - Jun 30, 12:00 UTCJun 30, 12:40 UTC40m
2026-06-30 SAMU49 - Jun 30, 11:00 UTCJun 30, 11:10 UTC10m
2026-06-29 SAMU49 - Jun 29, 19:20 UTCJun 29, 20:19 UTC1h 0m
2026-06-29 SAMU49 - Jun 29, 09:50 UTCJun 29, 10:00 UTC10m

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

Mode-S 39CA81 frequently asked

What is Mode-S code 39CA81?
39CA81 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HSUB.
Where is Mode-S 39CA81 registered?
Mode-S code 39CA81 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CA81 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CA81, octal 16345201, decimal 3,787,393.
What flights does 39CA81 operate?
Mode-S 39CA81 has broadcast 1 distinct callsign, including SAMU49.