Apparatus

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sensors Mode-S transponder

39D1A8

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HUNI

Hex
39D1A8
Octal
16350650
Decimal
3,789,224
Country
FR
Tail
F-HUNI
Type
DA42
No current signal · last broadcast 14d ago
Flights observed
93
Distinct callsigns
4
Country
FR
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S 39D1A8.

Country allocation

The ICAO 24-bit address 39D1A8 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 4 distinct

Callsign Airline Flights Last seen
FHUNI - 58 2026-07-01
FHUNI1 - 19 2026-07-03
FHUNI2 - 12 2026-06-25
FHUNI3 - 4 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-03 FHUNI1 - Jul 3, 07:30 UTCJul 3, 09:10 UTC1h 40m
2026-07-01 FHUNI - Jul 1, 08:30 UTCJul 1, 10:10 UTC1h 40m
2026-06-30 FHUNI CEQ → CEQ Jun 30, 07:10 UTCJun 30, 08:00 UTC50m
2026-06-29 FHUNI1 - Jun 29, 11:10 UTCJun 29, 12:55 UTC1h 45m
2026-06-29 FHUNI - Jun 29, 06:44 UTCJun 29, 08:44 UTC2h 0m
2026-06-27 FHUNI - Jun 27, 05:19 UTCJun 27, 05:59 UTC40m
2026-06-26 FHUNI1 - Jun 26, 12:24 UTCJun 26, 14:09 UTC1h 45m
2026-06-25 FHUNI1 - Jun 25, 11:54 UTCJun 25, 13:35 UTC1h 40m
2026-06-25 FHUNI2 - Jun 25, 09:25 UTCJun 25, 10:20 UTC55m
2026-06-25 FHUNI - Jun 25, 06:50 UTCJun 25, 08:09 UTC1h 20m
2026-06-23 FHUNI - Jun 23, 08:30 UTCJun 23, 09:49 UTC1h 20m
2026-06-22 FHUNI AHO → CEQ Jun 22, 13:19 UTCJun 22, 16:45 UTC3h 25m
2026-06-22 FHUNI - Jun 22, 10:15 UTCJun 22, 11:04 UTC50m
2026-06-22 FHUNI - Jun 22, 07:19 UTCJun 22, 09:19 UTC2h 0m
2026-06-19 FHUNI2 - Jun 19, 13:24 UTCJun 19, 15:44 UTC2h 20m
2026-06-19 FHUNI - Jun 19, 08:20 UTCJun 19, 10:14 UTC1h 55m
2026-06-18 FHUNI - Jun 18, 13:20 UTCJun 18, 15:10 UTC1h 50m
2026-06-18 FHUNI - Jun 18, 07:20 UTCJun 18, 09:25 UTC2h 5m
2026-06-17 FHUNI - Jun 17, 08:55 UTCJun 17, 09:40 UTC45m
2026-06-16 FHUNI - Jun 16, 12:45 UTCJun 16, 16:15 UTC3h 30m
2026-06-16 FHUNI - Jun 16, 09:50 UTCJun 16, 11:20 UTC1h 30m
2026-06-16 FHUNI - Jun 16, 07:15 UTCJun 16, 09:04 UTC1h 50m
2026-06-15 FHUNI - Jun 15, 07:25 UTCJun 15, 09:20 UTC1h 55m
2026-06-14 FHUNI3 - Jun 14, 13:25 UTCJun 14, 15:00 UTC1h 35m
2026-06-14 FHUNI - Jun 14, 12:15 UTCJun 14, 12:40 UTC25m
2026-06-14 FHUNI - Jun 14, 08:05 UTCJun 14, 10:20 UTC2h 15m
2026-06-12 FHUNI - Jun 12, 13:45 UTCJun 12, 16:15 UTC2h 30m
2026-06-12 FHUNI CEQ → CEQ Jun 12, 07:15 UTCJun 12, 09:00 UTC1h 45m
2026-06-11 FHUNI2 - Jun 11, 16:00 UTCJun 11, 16:55 UTC55m
2026-06-11 FHUNI - Jun 11, 12:55 UTCJun 11, 15:10 UTC2h 15m
2026-06-11 FHUNI - Jun 11, 09:45 UTCJun 11, 11:30 UTC1h 45m
2026-06-11 FHUNI - Jun 11, 07:15 UTCJun 11, 08:45 UTC1h 30m
2026-06-10 FHUNI1 - Jun 10, 13:10 UTCJun 10, 14:50 UTC1h 40m
2026-06-10 FHUNI1 - Jun 10, 08:10 UTCJun 10, 09:45 UTC1h 35m
2026-06-09 FHUNI - Jun 9, 16:45 UTCJun 9, 16:50 UTC5m
2026-06-09 FHUNI - Jun 9, 14:25 UTCJun 9, 15:50 UTC1h 25m
2026-06-09 FHUNI1 - Jun 9, 08:15 UTCJun 9, 09:55 UTC1h 40m
2026-06-08 FHUNI1 - Jun 8, 14:30 UTCJun 8, 16:00 UTC1h 30m
2026-06-08 FHUNI - Jun 8, 12:40 UTCJun 8, 13:40 UTC1h 0m
2026-06-08 FHUNI - Jun 8, 09:50 UTCJun 8, 11:05 UTC1h 15m
2026-06-08 FHUNI - Jun 8, 07:30 UTCJun 8, 09:05 UTC1h 35m
2026-06-04 FHUNI - Jun 4, 15:30 UTCJun 4, 17:30 UTC2h 0m
2026-06-04 FHUNI1 - Jun 4, 12:10 UTCJun 4, 13:40 UTC1h 30m
2026-06-04 FHUNI - Jun 4, 10:05 UTCJun 4, 11:20 UTC1h 15m
2026-06-03 FHUNI - Jun 3, 14:40 UTCJun 3, 17:05 UTC2h 25m
2026-06-03 FHUNI CEQ → CEQ Jun 3, 09:05 UTCJun 3, 10:55 UTC1h 50m
2026-06-02 FHUNI - Jun 2, 07:50 UTCJun 2, 10:20 UTC2h 30m
2026-05-29 FHUNI - May 29, 11:50 UTCMay 29, 12:55 UTC1h 5m
2026-05-14 FHUNI - May 14, 07:15 UTCMay 14, 09:00 UTC1h 45m
2026-05-12 FHUNI3 - May 12, 14:20 UTCMay 12, 15:25 UTC1h 5m

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

Mode-S 39D1A8 frequently asked

What is Mode-S code 39D1A8?
39D1A8 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HUNI.
Where is Mode-S 39D1A8 registered?
Mode-S code 39D1A8 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39D1A8 broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39D1A8, octal 16350650, decimal 3,789,224.
What flights does 39D1A8 operate?
Mode-S 39D1A8 has broadcast 4 distinct callsigns, including FHUNI, FHUNI1, FHUNI2, FHUNI3.