Apparatus

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sensors Mode-S transponder

399966

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HGLG · LEARJET 75

Hex
399966
Octal
16314546
Decimal
3,774,822
Country
FR
Tail
F-HGLG
Type
LJ75
No current signal · last broadcast 1d ago
Flights observed
54
Distinct callsigns
1
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 399966.

Country allocation

The ICAO 24-bit address 399966 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
FHGLG - 54 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 FHGLG CFE → LBG Jul 20, 17:05 UTCJul 20, 17:45 UTC40m
2026-07-20 FHGLG - Jul 20, 09:00 UTCJul 20, 10:00 UTC1h 0m
2026-07-20 FHGLG - Jul 20, 06:50 UTCJul 20, 08:00 UTC1h 10m
2026-07-20 FHGLG CFE → LYN Jul 20, 06:05 UTCJul 20, 06:40 UTC35m
2026-07-07 FHGLG - Jul 7, 16:15 UTCJul 7, 16:50 UTC35m
2026-07-06 FHGLG CFE → LBG Jul 6, 05:00 UTCJul 6, 05:40 UTC40m
2026-07-02 FHGLG - Jul 2, 14:50 UTCJul 2, 16:40 UTC1h 50m
2026-07-02 FHGLG CFE → CAT Jul 2, 11:30 UTCJul 2, 13:25 UTC1h 55m
2026-07-01 FHGLG LBG → CFE Jul 1, 04:45 UTCJul 1, 05:20 UTC35m
2026-06-29 FHGLG CFE → LBG Jun 29, 15:04 UTCJun 29, 15:45 UTC40m
2026-06-29 FHGLG - Jun 29, 08:29 UTCJun 29, 10:20 UTC1h 50m
2026-06-29 FHGLG - Jun 29, 05:24 UTCJun 29, 07:15 UTC1h 50m
2026-06-25 FHGLG - Jun 25, 06:09 UTCJun 25, 06:50 UTC40m
2026-06-25 FHGLG CFE → LBG Jun 25, 04:45 UTCJun 25, 05:25 UTC40m
2026-06-24 FHGLG - Jun 24, 08:55 UTCJun 24, 10:30 UTC1h 35m
2026-06-24 FHGLG - Jun 24, 06:35 UTCJun 24, 08:14 UTC1h 40m
2026-06-24 FHGLG - Jun 24, 05:05 UTCJun 24, 05:49 UTC45m
2026-06-23 FHGLG - Jun 23, 17:39 UTCJun 23, 18:14 UTC35m
2026-06-23 FHGLG CFE → LBG Jun 23, 07:09 UTCJun 23, 07:55 UTC45m
2026-06-22 FHGLG - Jun 22, 12:44 UTCJun 22, 14:29 UTC1h 45m
2026-06-22 FHGLG CFE → KRK Jun 22, 09:04 UTCJun 22, 11:00 UTC1h 55m
2026-06-18 FHGLG - Jun 18, 15:30 UTCJun 18, 17:15 UTC1h 45m
2026-06-18 FHGLG CFE → CAT Jun 18, 05:40 UTCJun 18, 07:45 UTC2h 5m
2026-06-15 FHGLG - Jun 15, 13:54 UTCJun 15, 14:30 UTC35m
2026-06-15 FHGLG - Jun 15, 09:35 UTCJun 15, 10:24 UTC50m
2026-06-11 FHGLG - Jun 11, 13:05 UTCJun 11, 13:35 UTC30m
2026-06-10 FHGLG CFE → TLS Jun 10, 17:00 UTCJun 10, 17:30 UTC30m
2026-06-10 FHGLG - Jun 10, 06:25 UTCJun 10, 06:55 UTC30m
2026-06-10 FHGLG CFE → LBG Jun 10, 05:05 UTCJun 10, 05:45 UTC40m
2026-06-04 FHGLG - Jun 4, 12:50 UTCJun 4, 16:00 UTC3h 10m
2026-06-01 FHGLG - Jun 1, 11:35 UTCJun 1, 14:15 UTC2h 40m
2026-05-28 FHGLG - May 28, 09:55 UTCMay 28, 10:30 UTC35m
2026-05-28 FHGLG - May 28, 04:10 UTCMay 28, 04:55 UTC45m
2026-05-12 FHGLG - May 12, 16:25 UTCMay 12, 17:50 UTC1h 25m
2026-05-11 FHGLG - May 11, 04:25 UTCMay 11, 06:00 UTC1h 35m
2026-05-07 FHGLG - May 7, 09:05 UTCMay 7, 10:55 UTC1h 50m
2026-05-07 FHGLG NCL → EDI May 7, 07:45 UTCMay 7, 08:10 UTC25m
2026-05-06 FHGLG HUY → NCL May 6, 07:05 UTCMay 6, 07:35 UTC30m
2026-05-05 FHGLG - May 5, 05:55 UTCMay 5, 06:50 UTC55m
2026-05-05 FHGLG VHY → LBG May 5, 04:40 UTCMay 5, 05:20 UTC40m
2026-05-04 FHGLG - May 4, 16:30 UTCMay 4, 17:00 UTC30m
2026-05-04 FHGLG - May 4, 06:05 UTCMay 4, 06:35 UTC30m
2026-04-29 FHGLG - Apr 29, 17:30 UTCApr 29, 17:45 UTC15m
2026-04-29 FHGLG - Apr 29, 11:35 UTCApr 29, 12:10 UTC35m
2026-04-28 FHGLG RTM → ANE Apr 28, 15:50 UTCApr 28, 16:45 UTC55m
2026-04-28 FHGLG - Apr 28, 05:40 UTCApr 28, 06:40 UTC1h 0m
2026-04-23 FHGLG - Apr 23, 16:25 UTCApr 23, 16:50 UTC25m
2026-04-23 FHGLG - Apr 23, 15:10 UTCApr 23, 15:40 UTC30m
2026-04-23 FHGLG - Apr 23, 14:20 UTCApr 23, 14:35 UTC15m
2026-04-23 FHGLG - Apr 23, 06:15 UTCApr 23, 06:30 UTC15m

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

Mode-S 399966 frequently asked

What is Mode-S code 399966?
399966 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HGLG.
Where is Mode-S 399966 registered?
Mode-S code 399966 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 399966 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 399966, octal 16314546, decimal 3,774,822.
What flights does 399966 operate?
Mode-S 399966 has broadcast 1 distinct callsign, including FHGLG.