sensors Mode-S transponder

39D2AA

ICAO 24-bit transponder address · allocated to France

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

Hex
39D2AA
Octal
16351252
Decimal
3,789,482
Country
FR
Tail
F-HUVK
Type
A359
No current signal · last broadcast 14h ago
Flights observed
6
Distinct callsigns
3
Country
FR
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 39D2AA.

Country allocation

The ICAO 24-bit address 39D2AA 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 3 distinct

Callsign Airline Flights Last seen
AFR990 - 4 2026-04-13
AFR995 - 1 2026-04-13
AFR338 - 1 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR338 - Apr 14, 09:10 UTCApr 14, 10:40 UTC1h 30m
2026-04-13 AFR995 - Apr 13, 16:35 UTCApr 13, 17:00 UTC25m
2026-04-13 AFR990 - Apr 13, 08:20 UTCApr 13, 08:35 UTC15m
2026-04-13 AFR990 - Apr 13, 08:00 UTCApr 13, 08:35 UTC35m
2026-04-13 AFR990 - Apr 13, 05:05 UTCApr 13, 08:15 UTC3h 10m
2026-04-12 AFR990 - Apr 12, 23:55 UTCApr 13, 00:20 UTC25m

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

Mode-S 39D2AA frequently asked

What is Mode-S code 39D2AA?
39D2AA is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HUVK.
Where is Mode-S 39D2AA registered?
Mode-S code 39D2AA is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39D2AA broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39D2AA, octal 16351252, decimal 3,789,482.
What flights does 39D2AA operate?
Mode-S 39D2AA has broadcast 3 distinct callsigns, including AFR990, AFR995, AFR338.