Apparatus

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sensors Mode-S transponder

399A6C

ICAO 24-bit transponder address · allocated to France

Hex
399A6C
Octal
16315154
Decimal
3,775,084
Country
FR
No current signal · last broadcast 2d ago
Flights observed
142
Distinct callsigns
1
Country
FR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 399A6C.

Country allocation

The ICAO 24-bit address 399A6C 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
FHGTM - 142 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 FHGTM - Jul 15, 10:05 UTCJul 15, 11:10 UTC1h 5m
2026-07-15 FHGTM - Jul 15, 08:55 UTCJul 15, 09:15 UTC20m
2026-07-14 FHGTM - Jul 14, 10:10 UTCJul 14, 11:10 UTC1h 0m
2026-07-13 FHGTM - Jul 13, 07:45 UTCJul 13, 08:40 UTC55m
2026-07-12 FHGTM - Jul 12, 10:15 UTCJul 12, 11:10 UTC55m
2026-07-11 FHGTM - Jul 11, 09:55 UTCJul 11, 10:55 UTC1h 0m
2026-07-10 FHGTM - Jul 10, 06:25 UTCJul 10, 07:10 UTC45m
2026-07-09 FHGTM - Jul 9, 10:15 UTCJul 9, 11:05 UTC50m
2026-07-09 FHGTM - Jul 9, 08:05 UTCJul 9, 08:45 UTC40m
2026-07-09 FHGTM - Jul 9, 06:00 UTCJul 9, 07:15 UTC1h 15m
2026-07-08 FHGTM - Jul 8, 10:00 UTCJul 8, 11:00 UTC1h 0m
2026-07-08 FHGTM - Jul 8, 07:50 UTCJul 8, 08:35 UTC45m
2026-07-07 FHGTM - Jul 7, 09:50 UTCJul 7, 10:30 UTC40m
2026-07-07 FHGTM - Jul 7, 09:20 UTCJul 7, 09:35 UTC15m
2026-07-07 FHGTM - Jul 7, 08:25 UTCJul 7, 09:05 UTC40m
2026-07-06 FHGTM - Jul 6, 16:30 UTCJul 6, 17:10 UTC40m
2026-07-06 FHGTM - Jul 6, 09:10 UTCJul 6, 11:15 UTC2h 5m
2026-07-05 FHGTM - Jul 5, 15:25 UTCJul 5, 16:00 UTC35m
2026-07-05 FHGTM - Jul 5, 13:35 UTCJul 5, 14:25 UTC50m
2026-07-05 FHGTM - Jul 5, 09:25 UTCJul 5, 10:35 UTC1h 10m
2026-07-03 FHGTM - Jul 3, 14:55 UTCJul 3, 15:45 UTC50m
2026-07-03 FHGTM - Jul 3, 09:35 UTCJul 3, 11:05 UTC1h 30m
2026-07-02 FHGTM - Jul 2, 14:50 UTCJul 2, 15:20 UTC30m
2026-07-02 FHGTM - Jul 2, 10:05 UTCJul 2, 10:50 UTC45m
2026-07-01 FHGTM - Jul 1, 17:10 UTCJul 1, 18:10 UTC1h 0m
2026-07-01 FHGTM - Jul 1, 14:55 UTCJul 1, 15:35 UTC40m
2026-07-01 FHGTM - Jul 1, 08:20 UTCJul 1, 08:55 UTC35m
2026-06-30 FHGTM - Jun 30, 14:35 UTCJun 30, 15:15 UTC40m
2026-06-30 FHGTM - Jun 30, 10:15 UTCJun 30, 10:45 UTC30m
2026-06-30 FHGTM - Jun 30, 07:45 UTCJun 30, 08:35 UTC50m
2026-06-29 FHGTM - Jun 29, 16:55 UTCJun 29, 17:40 UTC45m
2026-06-29 FHGTM - Jun 29, 14:34 UTCJun 29, 15:39 UTC1h 5m
2026-06-29 FHGTM - Jun 29, 11:50 UTCJun 29, 12:29 UTC40m
2026-06-26 FHGTM - Jun 26, 07:50 UTCJun 26, 08:40 UTC50m
2026-06-25 FHGTM - Jun 25, 09:55 UTCJun 25, 10:35 UTC40m
2026-06-25 FHGTM - Jun 25, 08:34 UTCJun 25, 09:05 UTC30m
2026-06-24 FHGTM - Jun 24, 08:04 UTCJun 24, 08:49 UTC45m
2026-06-24 FHGTM - Jun 24, 05:59 UTCJun 24, 06:55 UTC55m
2026-06-23 FHGTM - Jun 23, 09:40 UTCJun 23, 10:35 UTC55m
2026-06-23 FHGTM - Jun 23, 08:04 UTCJun 23, 08:45 UTC40m
2026-06-22 FHGTM - Jun 22, 08:04 UTCJun 22, 08:50 UTC45m
2026-06-20 FHGTM - Jun 20, 09:44 UTCJun 20, 10:49 UTC1h 5m
2026-06-20 FHGTM - Jun 20, 07:44 UTCJun 20, 08:34 UTC50m
2026-06-19 FHGTM - Jun 19, 10:09 UTCJun 19, 10:44 UTC35m
2026-06-19 FHGTM - Jun 19, 07:54 UTCJun 19, 08:40 UTC45m
2026-06-19 FHGTM - Jun 19, 06:59 UTCJun 19, 07:19 UTC20m
2026-06-19 FHGTM - Jun 19, 05:59 UTCJun 19, 06:24 UTC25m
2026-06-18 FHGTM - Jun 18, 10:20 UTCJun 18, 11:00 UTC40m
2026-06-18 FHGTM - Jun 18, 08:30 UTCJun 18, 09:00 UTC30m
2026-06-17 FHGTM - Jun 17, 12:45 UTCJun 17, 13:30 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.

Mode-S 399A6C frequently asked

What is Mode-S code 399A6C?
399A6C is an ICAO 24-bit transponder address. Allocated to France.
Where is Mode-S 399A6C registered?
Mode-S code 399A6C is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 399A6C 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 399A6C, octal 16315154, decimal 3,775,084.
What flights does 399A6C operate?
Mode-S 399A6C has broadcast 1 distinct callsign, including FHGTM.