Apparatus

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sensors Mode-S transponder

39DE61

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HXTB · AIRBUS HELICOPTERS EC-225/725

Hex
39DE61
Octal
16357141
Decimal
3,792,481
Country
FR
Tail
F-HXTB
Type
EC25
No current signal · last broadcast 1d ago
Flights observed
76
Distinct callsigns
4
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 39DE61.

Country allocation

The ICAO 24-bit address 39DE61 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 4 distinct

Callsign Airline Flights Last seen
PUMAA - 52 2026-07-15
FHXTB - 18 2026-07-09
PUMAE - 4 2026-06-28
PUMAD - 1 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 PUMAD - Jul 16, 08:20 UTCJul 16, 09:45 UTC1h 25m
2026-07-15 PUMAA - Jul 15, 12:55 UTCJul 15, 14:10 UTC1h 15m
2026-07-15 PUMAA - Jul 15, 12:00 UTCJul 15, 12:10 UTC10m
2026-07-15 - - Jul 15, 09:35 UTCJul 15, 09:45 UTC10m
2026-07-14 PUMAA - Jul 14, 14:40 UTCJul 14, 15:45 UTC1h 5m
2026-07-14 PUMAA - Jul 14, 10:25 UTCJul 14, 10:55 UTC30m
2026-07-14 PUMAA - Jul 14, 08:50 UTCJul 14, 09:00 UTC10m
2026-07-13 PUMAA - Jul 13, 16:10 UTCJul 13, 17:10 UTC1h 0m
2026-07-13 PUMAA - Jul 13, 13:00 UTCJul 13, 14:30 UTC1h 30m
2026-07-13 PUMAA - Jul 13, 11:00 UTCJul 13, 11:40 UTC40m
2026-07-13 PUMAA - Jul 13, 08:20 UTCJul 13, 10:05 UTC1h 45m
2026-07-09 FHXTB AVN → AVN Jul 9, 09:45 UTCJul 9, 10:10 UTC25m
2026-07-05 PUMAA - Jul 5, 15:25 UTCJul 5, 17:20 UTC1h 55m
2026-07-05 PUMAA - Jul 5, 11:25 UTCJul 5, 14:55 UTC3h 30m
2026-07-05 PUMAA AVN → FNI Jul 5, 08:15 UTCJul 5, 10:55 UTC2h 40m
2026-07-04 PUMAA VAF → AVN Jul 4, 16:35 UTCJul 4, 18:40 UTC2h 5m
2026-07-04 PUMAA - Jul 4, 07:30 UTCJul 4, 09:20 UTC1h 50m
2026-07-03 PUMAA - Jul 3, 17:30 UTCJul 3, 17:55 UTC25m
2026-07-03 PUMAA - Jul 3, 11:15 UTCJul 3, 11:50 UTC35m
2026-07-03 PUMAA - Jul 3, 08:40 UTCJul 3, 09:15 UTC35m
2026-07-02 PUMAA - Jul 2, 12:35 UTCJul 2, 15:55 UTC3h 20m
2026-07-02 PUMAA - Jul 2, 08:30 UTCJul 2, 11:00 UTC2h 30m
2026-07-01 PUMAA AVN → AVN Jul 1, 18:10 UTCJul 1, 20:00 UTC1h 50m
2026-07-01 PUMAA - Jul 1, 15:10 UTCJul 1, 16:05 UTC55m
2026-06-28 PUMAE - Jun 28, 17:39 UTCJun 28, 18:29 UTC50m
2026-06-27 PUMAE - Jun 27, 18:20 UTCJun 27, 18:24 UTC5m
2026-06-27 PUMAE - Jun 27, 10:54 UTCJun 27, 11:04 UTC10m
2026-06-25 PUMAE - Jun 25, 07:59 UTCJun 25, 08:45 UTC45m
2026-06-24 PUMAA - Jun 24, 18:20 UTCJun 24, 19:10 UTC50m
2026-06-24 PUMAA - Jun 24, 17:25 UTCJun 24, 17:45 UTC20m
2026-06-24 PUMAA - Jun 24, 12:44 UTCJun 24, 13:20 UTC35m
2026-06-24 PUMAA - Jun 24, 11:14 UTCJun 24, 11:50 UTC35m
2026-06-23 PUMAA - Jun 23, 14:44 UTCJun 23, 15:09 UTC25m
2026-06-23 PUMAA - Jun 23, 08:50 UTCJun 23, 09:20 UTC30m
2026-06-22 PUMAA - Jun 22, 18:15 UTCJun 22, 18:44 UTC30m
2026-06-22 PUMAA - Jun 22, 14:45 UTCJun 22, 14:59 UTC15m
2026-06-22 PUMAA - Jun 22, 11:39 UTCJun 22, 11:50 UTC10m
2026-06-22 PUMAA - Jun 22, 08:19 UTCJun 22, 08:50 UTC30m
2026-06-21 PUMAA - Jun 21, 11:55 UTCJun 21, 12:55 UTC1h 0m
2026-06-21 PUMAA - Jun 21, 09:24 UTCJun 21, 11:10 UTC1h 45m
2026-06-20 PUMAA - Jun 20, 17:04 UTCJun 20, 18:34 UTC1h 30m
2026-06-19 PUMAA - Jun 19, 13:59 UTCJun 19, 14:24 UTC25m
2026-06-19 PUMAA CFE → CFE Jun 19, 12:29 UTCJun 19, 12:49 UTC20m
2026-06-19 PUMAA - Jun 19, 08:50 UTCJun 19, 11:04 UTC2h 15m
2026-06-18 PUMAA - Jun 18, 13:35 UTCJun 18, 14:01 UTC25m
2026-06-18 PUMAA - Jun 18, 09:35 UTCJun 18, 09:55 UTC20m
2026-06-16 PUMAA - Jun 16, 15:35 UTCJun 16, 16:39 UTC1h 5m
2026-06-16 PUMAA - Jun 16, 11:10 UTCJun 16, 11:20 UTC10m
2026-06-16 PUMAA - Jun 16, 08:35 UTCJun 16, 09:45 UTC1h 10m
2026-06-11 PUMAA - Jun 11, 15:35 UTCJun 11, 16:20 UTC45m

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

Mode-S 39DE61 frequently asked

What is Mode-S code 39DE61?
39DE61 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HXTB.
Where is Mode-S 39DE61 registered?
Mode-S code 39DE61 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39DE61 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 39DE61, octal 16357141, decimal 3,792,481.
What flights does 39DE61 operate?
Mode-S 39DE61 has broadcast 4 distinct callsigns, including PUMAA, FHXTB, PUMAE, PUMAD.