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sensors Mode-S transponder

39844C

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HBCM · ATR-72-600

Hex
39844C
Octal
16302114
Decimal
3,769,420
Country
FR
Tail
F-HBCM
Type
AT76
Transponder active on ground
Flights observed
327
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 19:00 UTC

Last known position

Most recent position reported by Mode-S 39844C.

Country allocation

The ICAO 24-bit address 39844C 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 20 distinct

Callsign Airline Flights Last seen
CLG1936 Chalair Aviation 82 2026-07-26
CLG1935 Chalair Aviation 82 2026-07-26
CLG1931 Chalair Aviation 58 2026-07-24
CLG1932 Chalair Aviation 56 2026-07-24
CLG1942 - 6 2026-07-25
CLG1941 Chalair Aviation 6 2026-07-25
CLG1978 Chalair Aviation 5 2026-07-26
CLG1977 Chalair Aviation 5 2026-07-26
CLG6422 - 4 2026-07-25
CLG6421 Chalair Aviation 4 2026-07-25
CLG1954 - 3 2026-07-24
CLG1953 - 3 2026-07-24
CLG907N Chalair Aviation 2 2026-05-17
CLG907M - 2 2026-05-15
CLG5052 Chalair Aviation 2 2026-05-16
CLG5051 - 2 2026-05-15
CLG907U - 1 2026-06-19
CLG907T - 1 2026-06-19
CLG907P Chalair Aviation 1 2026-05-08
CLG907O - 1 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CLG1936 ORY → BVE Jul 26, 18:10 UTCJul 26, 19:00 UTC50m
2026-07-26 CLG1935 BVE → ORY Jul 26, 16:15 UTCJul 26, 17:20 UTC1h 5m
2026-07-26 CLG1978 KIR → BVE Jul 26, 11:35 UTCJul 26, 13:45 UTC2h 10m
2026-07-26 CLG1977 BVE → KIR Jul 26, 07:35 UTCJul 26, 10:25 UTC2h 50m
2026-07-25 CLG1942 - Jul 25, 16:00 UTCJul 25, 17:40 UTC1h 40m
2026-07-25 CLG6422 - Jul 25, 13:25 UTCJul 25, 15:00 UTC1h 35m
2026-07-25 CLG6421 AJA → PUF Jul 25, 10:35 UTCJul 25, 12:35 UTC2h 0m
2026-07-25 CLG1941 BVE → AJA Jul 25, 08:10 UTCJul 25, 09:35 UTC1h 25m
2026-07-24 CLG1936 ORY → BVE Jul 24, 20:40 UTCJul 24, 21:40 UTC1h 0m
2026-07-24 CLG1935 BVE → ORY Jul 24, 18:35 UTCJul 24, 19:30 UTC55m
2026-07-24 CLG1954 - Jul 24, 16:00 UTCJul 24, 17:25 UTC1h 25m
2026-07-24 CLG1953 - Jul 24, 10:50 UTCJul 24, 12:00 UTC1h 10m
2026-07-24 CLG1932 ORY → BVE Jul 24, 07:20 UTCJul 24, 08:15 UTC55m
2026-07-24 CLG1931 BVE → ORY Jul 24, 05:10 UTCJul 24, 06:20 UTC1h 10m
2026-07-23 CLG1936 ORY → BVE Jul 23, 17:55 UTCJul 23, 18:50 UTC55m
2026-07-23 CLG1935 BVE → ORY Jul 23, 16:05 UTCJul 23, 17:05 UTC1h 0m
2026-07-22 CLG1936 ORY → BVE Jul 22, 18:00 UTCJul 22, 18:55 UTC55m
2026-07-22 CLG1935 BVE → ORY Jul 22, 16:00 UTCJul 22, 17:00 UTC1h 0m
2026-07-22 CLG1931 - Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-21 CLG1936 ORY → BVE Jul 21, 18:00 UTCJul 21, 18:50 UTC50m
2026-07-21 CLG1935 - Jul 21, 16:05 UTCJul 21, 17:00 UTC55m
2026-07-21 CLG1932 - Jul 21, 07:10 UTCJul 21, 08:05 UTC55m
2026-07-21 CLG1931 - Jul 21, 05:10 UTCJul 21, 06:15 UTC1h 5m
2026-07-20 CLG1936 ORY → BVE Jul 20, 17:55 UTCJul 20, 18:50 UTC55m
2026-07-20 CLG1935 - Jul 20, 15:55 UTCJul 20, 16:50 UTC55m
2026-07-20 CLG1932 - Jul 20, 07:10 UTCJul 20, 08:05 UTC55m
2026-07-20 CLG1931 - Jul 20, 05:10 UTCJul 20, 06:15 UTC1h 5m
2026-07-19 CLG1936 ORY → BVE Jul 19, 18:05 UTCJul 19, 19:00 UTC55m
2026-07-19 CLG1935 - Jul 19, 16:10 UTCJul 19, 17:10 UTC1h 0m
2026-07-19 CLG1978 - Jul 19, 11:10 UTCJul 19, 13:25 UTC2h 15m
2026-07-19 CLG1977 - Jul 19, 07:40 UTCJul 19, 10:15 UTC2h 35m
2026-07-18 CLG1942 - Jul 18, 15:40 UTCJul 18, 17:20 UTC1h 40m
2026-07-18 CLG6422 - Jul 18, 13:05 UTCJul 18, 14:35 UTC1h 30m
2026-07-18 CLG6421 - Jul 18, 09:55 UTCJul 18, 11:55 UTC2h 0m
2026-07-18 CLG1941 - Jul 18, 07:35 UTCJul 18, 09:00 UTC1h 25m
2026-07-17 CLG1936 ORY → BVE Jul 17, 18:50 UTCJul 17, 19:45 UTC55m
2026-07-17 CLG1935 - Jul 17, 16:40 UTCJul 17, 17:35 UTC55m
2026-07-17 CLG1954 - Jul 17, 14:04 UTCJul 17, 15:35 UTC1h 30m
2026-07-17 CLG1953 - Jul 17, 11:04 UTCJul 17, 12:10 UTC1h 5m
2026-07-17 CLG1932 - Jul 17, 07:14 UTCJul 17, 08:10 UTC55m
2026-07-17 CLG1931 - Jul 17, 05:10 UTCJul 17, 06:10 UTC1h 0m
2026-07-16 CLG1936 ORY → BVE Jul 16, 18:10 UTCJul 16, 19:05 UTC55m
2026-07-16 CLG1935 - Jul 16, 16:09 UTCJul 16, 17:05 UTC55m
2026-07-15 CLG1936 ORY → BVE Jul 15, 18:15 UTCJul 15, 19:10 UTC55m
2026-07-15 CLG1935 - Jul 15, 16:20 UTCJul 15, 17:15 UTC55m
2026-07-15 CLG1932 - Jul 15, 07:05 UTCJul 15, 08:05 UTC1h 0m
2026-07-15 CLG1931 - Jul 15, 05:20 UTCJul 15, 06:15 UTC55m
2026-07-12 CLG1936 ORY → BVE Jul 12, 18:05 UTCJul 12, 19:05 UTC1h 0m
2026-07-12 CLG1935 BVE → ORY Jul 12, 16:01 UTCJul 12, 16:55 UTC55m
2026-07-12 CLG1978 - Jul 12, 11:40 UTCJul 12, 14:05 UTC2h 25m

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

Mode-S 39844C frequently asked

What is Mode-S code 39844C?
39844C is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HBCM.
Where is Mode-S 39844C registered?
Mode-S code 39844C is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39844C broadcasting right now?
Mode-S 39844C is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39844C, octal 16302114, decimal 3,769,420.
What flights does 39844C operate?
Mode-S 39844C has broadcast 20 distinct callsigns, including CLG1936, CLG1935, CLG1931, CLG1932, CLG1942.