Apparatus

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sensors Mode-S transponder

399993

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HGMT · CESSNA 172 Skyhawk

Hex
399993
Octal
16314623
Decimal
3,774,867
Country
FR
Tail
F-HGMT
Type
C172
No current signal · last broadcast 17d ago
Flights observed
99
Distinct callsigns
1
Country
FR
Last broadcast
17d ago

Last known position

Most recent position reported by Mode-S 399993.

Country allocation

The ICAO 24-bit address 399993 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
FHGMT - 99 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-30 FHGMT - Jun 30, 18:10 UTCJun 30, 18:30 UTC20m
2026-06-30 FHGMT - Jun 30, 16:40 UTCJun 30, 16:55 UTC15m
2026-06-27 FHGMT - Jun 27, 11:20 UTCJun 27, 12:04 UTC45m
2026-06-26 FHGMT - Jun 26, 06:00 UTCJun 26, 06:39 UTC40m
2026-06-24 FHGMT - Jun 24, 07:50 UTCJun 24, 08:35 UTC45m
2026-06-21 FHGMT - Jun 21, 09:10 UTCJun 21, 10:29 UTC1h 20m
2026-06-21 FHGMT - Jun 21, 06:40 UTCJun 21, 08:04 UTC1h 25m
2026-06-20 FHGMT - Jun 20, 07:44 UTCJun 20, 08:19 UTC35m
2026-06-17 FHGMT - Jun 17, 17:15 UTCJun 17, 18:25 UTC1h 10m
2026-06-16 FHGMT - Jun 16, 16:00 UTCJun 16, 16:45 UTC45m
2026-06-16 FHGMT - Jun 16, 14:30 UTCJun 16, 14:55 UTC25m
2026-06-15 FHGMT - Jun 15, 16:19 UTCJun 15, 16:40 UTC20m
2026-06-15 FHGMT - Jun 15, 15:19 UTCJun 15, 15:35 UTC15m
2026-06-15 FHGMT - Jun 15, 11:34 UTCJun 15, 12:30 UTC55m
2026-06-15 FHGMT - Jun 15, 10:00 UTCJun 15, 11:00 UTC1h 0m
2026-06-13 FHGMT - Jun 13, 17:50 UTCJun 13, 18:40 UTC50m
2026-06-13 FHGMT - Jun 13, 15:25 UTCJun 13, 16:25 UTC1h 0m
2026-06-13 FHGMT - Jun 13, 14:15 UTCJun 13, 14:25 UTC10m
2026-06-13 FHGMT - Jun 13, 09:00 UTCJun 13, 09:30 UTC30m
2026-06-12 FHGMT - Jun 12, 16:05 UTCJun 12, 16:35 UTC30m
2026-06-12 FHGMT - Jun 12, 13:35 UTCJun 12, 14:25 UTC50m
2026-06-11 FHGMT - Jun 11, 16:40 UTCJun 11, 17:35 UTC55m
2026-06-11 FHGMT - Jun 11, 14:30 UTCJun 11, 15:05 UTC35m
2026-06-11 FHGMT - Jun 11, 13:45 UTCJun 11, 14:00 UTC15m
2026-06-11 FHGMT - Jun 11, 08:40 UTCJun 11, 09:50 UTC1h 10m
2026-06-07 FHGMT - Jun 7, 15:05 UTCJun 7, 16:55 UTC1h 50m
2026-06-07 FHGMT - Jun 7, 13:30 UTCJun 7, 13:45 UTC15m
2026-06-07 FHGMT - Jun 7, 11:50 UTCJun 7, 12:55 UTC1h 5m
2026-06-07 FHGMT - Jun 7, 11:00 UTCJun 7, 11:15 UTC15m
2026-06-07 FHGMT - Jun 7, 10:15 UTCJun 7, 10:30 UTC15m
2026-06-06 FHGMT - Jun 6, 17:24 UTCJun 6, 18:00 UTC35m
2026-06-05 FHGMT - Jun 5, 17:05 UTCJun 5, 17:40 UTC35m
2026-06-05 FHGMT - Jun 5, 13:10 UTCJun 5, 14:05 UTC55m
2026-06-03 FHGMT - Jun 3, 15:35 UTCJun 3, 15:55 UTC20m
2026-06-03 FHGMT - Jun 3, 13:30 UTCJun 3, 13:55 UTC25m
2026-05-31 FHGMT - May 31, 16:50 UTCMay 31, 17:35 UTC45m
2026-05-31 FHGMT - May 31, 08:25 UTCMay 31, 09:20 UTC55m
2026-05-30 FHGMT - May 30, 09:20 UTCMay 30, 10:50 UTC1h 30m
2026-05-29 FHGMT - May 29, 18:10 UTCMay 29, 19:15 UTC1h 5m
2026-05-29 FHGMT - May 29, 15:25 UTCMay 29, 15:50 UTC25m
2026-05-27 FHGMT - May 27, 18:30 UTCMay 27, 20:10 UTC1h 40m
2026-05-27 FHGMT - May 27, 08:55 UTCMay 27, 10:15 UTC1h 20m
2026-05-27 FHGMT - May 27, 08:05 UTCMay 27, 08:20 UTC15m
2026-05-25 FHGMT - May 25, 16:25 UTCMay 25, 16:35 UTC10m
2026-05-25 FHGMT - May 25, 13:40 UTCMay 25, 13:55 UTC15m
2026-05-25 FHGMT - May 25, 11:45 UTCMay 25, 12:05 UTC20m
2026-05-25 FHGMT - May 25, 08:05 UTCMay 25, 08:45 UTC40m
2026-05-23 FHGMT - May 23, 17:40 UTCMay 23, 18:35 UTC55m
2026-05-23 FHGMT - May 23, 16:15 UTCMay 23, 16:50 UTC35m
2026-05-23 FHGMT - May 23, 10:00 UTCMay 23, 10:45 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-HGMT page for operator, model, and routing details .

Mode-S 399993 frequently asked

What is Mode-S code 399993?
399993 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HGMT.
Where is Mode-S 399993 registered?
Mode-S code 399993 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 399993 broadcasting right now?
No active broadcast right now. Last signal was 17d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 399993, octal 16314623, decimal 3,774,867.
What flights does 399993 operate?
Mode-S 399993 has broadcast 1 distinct callsign, including FHGMT.