Apparatus

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sensors Mode-S transponder

39D2AF

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HUVP · AIRBUS A-350-900

Hex
39D2AF
Octal
16351257
Decimal
3,789,487
Country
FR
Tail
F-HUVP
Type
A359
No current signal · last broadcast 15h ago
Flights observed
7
Distinct callsigns
2
Country
FR
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 39D2AF.

Country allocation

The ICAO 24-bit address 39D2AF 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 2 distinct

Callsign Airline Flights Last seen
AFR287 - 6 2026-04-13
AFR98G Air France 1 2026-04-14

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR98G CDG → IAH Apr 14, 09:10 UTCApr 14, 10:55 UTC1h 45m
2026-04-13 AFR287 - Apr 13, 16:15 UTCApr 13, 16:55 UTC40m
2026-04-13 AFR287 - Apr 13, 15:50 UTCApr 13, 16:55 UTC1h 5m
2026-04-13 AFR287 - Apr 13, 15:20 UTCApr 13, 16:15 UTC55m
2026-04-13 AFR287 - Apr 13, 08:20 UTCApr 13, 09:00 UTC40m
2026-04-13 AFR287 - Apr 13, 08:05 UTCApr 13, 08:15 UTC10m
2026-04-13 AFR287 - Apr 13, 03:05 UTCApr 13, 03:45 UTC40m

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

Mode-S 39D2AF frequently asked

What is Mode-S code 39D2AF?
39D2AF is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HUVP.
Where is Mode-S 39D2AF registered?
Mode-S code 39D2AF is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39D2AF broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39D2AF, octal 16351257, decimal 3,789,487.
What flights does 39D2AF operate?
Mode-S 39D2AF has broadcast 2 distinct callsigns, including AFR287, AFR98G.