Apparatus

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sensors Mode-S transponder

398541

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HBKB · AIRBUS HELICOPTERS EC-120

Hex
398541
Octal
16302501
Decimal
3,769,665
Country
FR
Tail
F-HBKB
Type
EC20
No current signal · last broadcast 1d ago
Flights observed
94
Distinct callsigns
8
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 398541.

Country allocation

The ICAO 24-bit address 398541 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 8 distinct

Callsign Airline Flights Last seen
FHBKB - 65 2026-07-16
FMY88A5 - 9 2026-07-01
FMY88C7 - 6 2026-07-02
FMY8711 - 4 2026-06-07
FMY88S2 - 3 2026-06-25
FMY8793 - 3 2026-06-09
FMY8780 - 2 2026-06-17
FMY8733 - 2 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 FHBKB - Jul 16, 13:40 UTCJul 16, 14:25 UTC45m
2026-07-08 FHBKB - Jul 8, 17:15 UTCJul 8, 17:30 UTC15m
2026-07-07 FHBKB - Jul 7, 10:00 UTCJul 7, 10:20 UTC20m
2026-07-07 FHBKB - Jul 7, 08:35 UTCJul 7, 08:50 UTC15m
2026-07-06 FHBKB - Jul 6, 06:55 UTCJul 6, 07:10 UTC15m
2026-07-02 FMY88C7 - Jul 2, 09:25 UTCJul 2, 10:05 UTC40m
2026-07-02 FMY88C7 - Jul 2, 06:41 UTCJul 2, 07:40 UTC59m
2026-07-01 FMY88A5 - Jul 1, 20:30 UTCJul 1, 21:55 UTC1h 25m
2026-07-01 FMY88A5 - Jul 1, 18:45 UTCJul 1, 19:25 UTC40m
2026-07-01 FMY88A5 - Jul 1, 16:45 UTCJul 1, 18:00 UTC1h 15m
2026-07-01 FMY88A5 - Jul 1, 14:35 UTCJul 1, 15:10 UTC35m
2026-07-01 FMY88A5 - Jul 1, 07:45 UTCJul 1, 10:10 UTC2h 25m
2026-06-29 FHBKB - Jun 29, 15:34 UTCJun 29, 15:54 UTC20m
2026-06-29 FHBKB - Jun 29, 12:00 UTCJun 29, 12:39 UTC40m
2026-06-26 FHBKB - Jun 26, 07:35 UTCJun 26, 07:45 UTC10m
2026-06-25 FMY88S2 - Jun 25, 13:29 UTCJun 25, 15:24 UTC1h 55m
2026-06-25 FMY88S2 - Jun 25, 08:14 UTCJun 25, 09:50 UTC1h 35m
2026-06-24 FMY88S2 - Jun 24, 13:20 UTCJun 24, 15:44 UTC2h 25m
2026-06-23 FMY88C7 - Jun 23, 14:55 UTCJun 23, 16:24 UTC1h 30m
2026-06-23 FMY88C7 - Jun 23, 13:59 UTCJun 23, 14:15 UTC15m
2026-06-23 FMY88C7 - Jun 23, 08:45 UTCJun 23, 09:09 UTC25m
2026-06-23 FMY88C7 - Jun 23, 07:15 UTCJun 23, 07:55 UTC40m
2026-06-22 FHBKB - Jun 22, 21:40 UTCJun 22, 22:15 UTC35m
2026-06-22 FHBKB - Jun 22, 20:34 UTCJun 22, 21:05 UTC30m
2026-06-22 FHBKB - Jun 22, 15:20 UTCJun 22, 15:29 UTC10m
2026-06-22 FHBKB - Jun 22, 12:15 UTCJun 22, 12:25 UTC10m
2026-06-18 FMY88A5 - Jun 18, 15:40 UTCJun 18, 16:15 UTC35m
2026-06-18 FMY88A5 - Jun 18, 14:25 UTCJun 18, 14:35 UTC10m
2026-06-18 FMY88A5 - Jun 18, 10:45 UTCJun 18, 12:55 UTC2h 10m
2026-06-18 FHBKB - Jun 18, 07:25 UTCJun 18, 07:35 UTC10m
2026-06-17 FHBKB - Jun 17, 21:20 UTCJun 17, 21:55 UTC35m
2026-06-17 FHBKB - Jun 17, 20:10 UTCJun 17, 20:45 UTC35m
2026-06-17 FMY88A5 - Jun 17, 10:20 UTCJun 17, 10:50 UTC30m
2026-06-17 FMY8780 - Jun 17, 07:55 UTCJun 17, 08:35 UTC40m
2026-06-17 FMY8780 - Jun 17, 07:10 UTCJun 17, 07:20 UTC10m
2026-06-16 FHBKB - Jun 16, 06:45 UTCJun 16, 08:05 UTC1h 20m
2026-06-15 FHBKB - Jun 15, 10:55 UTCJun 15, 12:00 UTC1h 5m
2026-06-15 FHBKB - Jun 15, 08:20 UTCJun 15, 08:29 UTC10m
2026-06-10 FHBKB - Jun 10, 20:10 UTCJun 10, 22:00 UTC1h 50m
2026-06-10 FHBKB - Jun 10, 11:20 UTCJun 10, 12:35 UTC1h 15m
2026-06-09 FMY8793 - Jun 9, 11:40 UTCJun 9, 12:00 UTC20m
2026-06-09 FHBKB - Jun 9, 07:05 UTCJun 9, 07:50 UTC45m
2026-06-07 FMY8711 - Jun 7, 09:45 UTCJun 7, 10:10 UTC25m
2026-06-07 FMY8711 - Jun 7, 07:55 UTCJun 7, 08:20 UTC25m
2026-06-03 FMY8711 - Jun 3, 11:00 UTCJun 3, 11:40 UTC40m
2026-06-03 FMY8711 - Jun 3, 07:25 UTCJun 3, 08:20 UTC55m
2026-06-02 FHBKB - Jun 2, 06:55 UTCJun 2, 07:05 UTC10m
2026-06-01 FHBKB - Jun 1, 13:35 UTCJun 1, 13:45 UTC10m
2026-06-01 FHBKB - Jun 1, 12:00 UTCJun 1, 12:10 UTC10m
2026-06-01 FHBKB - Jun 1, 10:30 UTCJun 1, 10:40 UTC10m

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

Mode-S 398541 frequently asked

What is Mode-S code 398541?
398541 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HBKB.
Where is Mode-S 398541 registered?
Mode-S code 398541 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 398541 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 398541, octal 16302501, decimal 3,769,665.
What flights does 398541 operate?
Mode-S 398541 has broadcast 8 distinct callsigns, including FHBKB, FMY88A5, FMY88C7, FMY8711, FMY88S2.