Apparatus

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sensors Mode-S transponder

398CE2

ICAO 24-bit transponder address · allocated to France

Hex
398CE2
Octal
16306342
Decimal
3,771,618
Country
FR
No current signal · last broadcast 7h ago
Flights observed
54
Distinct callsigns
1
Country
FR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 398CE2.

Country allocation

The ICAO 24-bit address 398CE2 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
FHDHC - 54 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 FHDHC - Jul 25, 08:40 UTCJul 25, 09:00 UTC20m
2026-07-25 FHDHC - Jul 25, 07:30 UTCJul 25, 07:45 UTC15m
2026-07-24 FHDHC - Jul 24, 09:25 UTCJul 24, 09:55 UTC30m
2026-07-23 FHDHC - Jul 23, 09:35 UTCJul 23, 10:15 UTC40m
2026-07-22 FHDHC - Jul 22, 15:55 UTCJul 22, 16:10 UTC15m
2026-07-20 FHDHC - Jul 20, 06:30 UTCJul 20, 06:45 UTC15m
2026-07-19 FHDHC - Jul 19, 15:35 UTCJul 19, 15:50 UTC15m
2026-07-18 FHDHC - Jul 18, 09:10 UTCJul 18, 09:25 UTC15m
2026-07-18 FHDHC - Jul 18, 07:15 UTCJul 18, 07:45 UTC30m
2026-07-17 FHDHC - Jul 17, 08:40 UTCJul 17, 09:04 UTC25m
2026-07-17 FHDHC - Jul 17, 06:15 UTCJul 17, 06:35 UTC20m
2026-07-16 FHDHC - Jul 16, 14:29 UTCJul 16, 15:14 UTC45m
2026-07-16 FHDHC - Jul 16, 09:35 UTCJul 16, 09:55 UTC20m
2026-07-16 FHDHC - Jul 16, 07:50 UTCJul 16, 08:05 UTC15m
2026-07-14 FHDHC - Jul 14, 14:35 UTCJul 14, 15:45 UTC1h 10m
2026-07-14 FHDHC - Jul 14, 07:15 UTCJul 14, 07:35 UTC20m
2026-07-09 FHDHC - Jul 9, 16:35 UTCJul 9, 16:45 UTC10m
2026-07-09 FHDHC - Jul 9, 15:10 UTCJul 9, 15:25 UTC15m
2026-07-09 FHDHC - Jul 9, 09:40 UTCJul 9, 09:55 UTC15m
2026-07-09 FHDHC - Jul 9, 08:55 UTCJul 9, 09:10 UTC15m
2026-07-07 FHDHC - Jul 7, 07:20 UTCJul 7, 07:30 UTC10m
2026-07-06 FHDHC - Jul 6, 16:25 UTCJul 6, 16:40 UTC15m
2026-07-05 FHDHC - Jul 5, 13:35 UTCJul 5, 14:55 UTC1h 20m
2026-07-01 FHDHC - Jul 1, 06:40 UTCJul 1, 07:00 UTC20m
2026-06-30 FHDHC - Jun 30, 13:15 UTCJun 30, 13:35 UTC20m
2026-06-29 FHDHC - Jun 29, 08:44 UTCJun 29, 10:00 UTC1h 15m
2026-06-28 FHDHC - Jun 28, 12:05 UTCJun 28, 12:19 UTC15m
2026-06-28 FHDHC - Jun 28, 08:29 UTCJun 28, 08:44 UTC15m
2026-06-26 FHDHC - Jun 26, 14:35 UTCJun 26, 15:15 UTC40m
2026-06-19 FHDHC - Jun 19, 15:29 UTCJun 19, 15:39 UTC10m
2026-06-18 FHDHC - Jun 18, 15:35 UTCJun 18, 15:55 UTC20m
2026-06-01 FHDHC - Jun 1, 08:55 UTCJun 1, 09:05 UTC10m
2026-05-27 FHDHC - May 27, 09:25 UTCMay 27, 10:30 UTC1h 5m
2026-05-24 FHDHC - May 24, 10:15 UTCMay 24, 10:25 UTC10m
2026-05-24 FHDHC - May 24, 09:05 UTCMay 24, 09:25 UTC20m
2026-05-17 FHDHC - May 17, 09:40 UTCMay 17, 10:00 UTC20m
2026-05-17 FHDHC - May 17, 08:20 UTCMay 17, 08:35 UTC15m
2026-05-15 FHDHC - May 15, 14:10 UTCMay 15, 14:30 UTC20m
2026-05-15 FHDHC - May 15, 08:35 UTCMay 15, 08:55 UTC20m
2026-05-14 FHDHC - May 14, 09:00 UTCMay 14, 09:15 UTC15m
2026-05-08 FHDHC - May 8, 13:15 UTCMay 8, 13:30 UTC15m
2026-05-08 FHDHC - May 8, 08:34 UTCMay 8, 08:49 UTC15m
2026-05-07 FHDHC - May 7, 17:00 UTCMay 7, 17:10 UTC10m
2026-05-07 FHDHC - May 7, 15:55 UTCMay 7, 16:20 UTC25m
2026-05-03 FHDHC - May 3, 14:00 UTCMay 3, 14:15 UTC15m
2026-05-03 FHDHC - May 3, 09:20 UTCMay 3, 09:35 UTC15m
2026-05-01 FHDHC - May 1, 07:35 UTCMay 1, 07:50 UTC15m
2026-04-30 FHDHC - Apr 30, 13:25 UTCApr 30, 13:35 UTC10m
2026-04-27 FHDHC - Apr 27, 08:50 UTCApr 27, 09:25 UTC35m
2026-04-26 FHDHC - Apr 26, 09:10 UTCApr 26, 09:45 UTC35m

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 398CE2 frequently asked

What is Mode-S code 398CE2?
398CE2 is an ICAO 24-bit transponder address. Allocated to France.
Where is Mode-S 398CE2 registered?
Mode-S code 398CE2 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 398CE2 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 398CE2, octal 16306342, decimal 3,771,618.
What flights does 398CE2 operate?
Mode-S 398CE2 has broadcast 1 distinct callsign, including FHDHC.