sensors Mode-S transponder

39D2A5

ICAO 24-bit transponder address · allocated to France

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

Hex
39D2A5
Octal
16351245
Decimal
3,789,477
Country
FR
Tail
F-HUVF
Type
A359
No current signal · last broadcast 16h ago
Flights observed
8
Distinct callsigns
3
Country
FR
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 39D2A5.

Country allocation

The ICAO 24-bit address 39D2A5 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
AFR98G Air France 4 2026-04-13
AFR185 - 2 2026-04-13
AFR099 - 2 2026-04-14

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR099 - Apr 14, 05:15 UTCApr 14, 06:25 UTC1h 10m
2026-04-13 AFR099 - Apr 13, 21:30 UTCApr 13, 23:40 UTC2h 10m
2026-04-13 AFR98G CDG → IAH Apr 13, 16:15 UTCApr 13, 18:55 UTC2h 40m
2026-04-13 AFR98G CDG → IAH Apr 13, 15:50 UTCApr 13, 18:55 UTC3h 5m
2026-04-13 AFR98G CDG → IAH Apr 13, 14:15 UTCApr 13, 16:15 UTC2h 0m
2026-04-13 AFR98G CDG → IAH Apr 13, 08:40 UTCApr 13, 10:20 UTC1h 40m
2026-04-13 AFR185 - Apr 13, 01:10 UTCApr 13, 03:40 UTC2h 30m
2026-04-12 AFR185 - Apr 12, 23:55 UTCApr 13, 03:40 UTC3h 45m

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

Mode-S 39D2A5 frequently asked

What is Mode-S code 39D2A5?
39D2A5 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HUVF.
Where is Mode-S 39D2A5 registered?
Mode-S code 39D2A5 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39D2A5 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39D2A5, octal 16351245, decimal 3,789,477.
What flights does 39D2A5 operate?
Mode-S 39D2A5 has broadcast 3 distinct callsigns, including AFR98G, AFR185, AFR099.