sensors Mode-S transponder

39A2E3

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HIXD · BOEING 737-800

Hex
39A2E3
Octal
16321343
Decimal
3,777,251
Country
FR
Tail
F-HIXD
Type
B738
No current signal · last broadcast 1d ago
Flights observed
8
Distinct callsigns
5
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 39A2E3.

Country allocation

The ICAO 24-bit address 39A2E3 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 5 distinct

Callsign Airline Flights Last seen
FPO172 - 3 2026-04-13
FPO443 - 2 2026-04-13
FPO444 Europe Airpost 1 2026-04-12
FPO171 - 1 2026-04-13
FPO162 - 1 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 FPO162 - Apr 13, 18:00 UTCApr 13, 19:45 UTC1h 45m
2026-04-13 FPO171 - Apr 13, 14:05 UTCApr 13, 15:45 UTC1h 40m
2026-04-13 FPO172 - Apr 13, 12:20 UTCApr 13, 12:45 UTC25m
2026-04-13 FPO172 - Apr 13, 11:55 UTCApr 13, 12:45 UTC50m
2026-04-13 FPO172 - Apr 13, 11:00 UTCApr 13, 12:15 UTC1h 15m
2026-04-13 FPO443 - Apr 13, 07:55 UTCApr 13, 08:35 UTC40m
2026-04-13 FPO443 - Apr 13, 06:25 UTCApr 13, 08:15 UTC1h 50m
2026-04-12 FPO444 ALG → LIL Apr 12, 17:15 UTCApr 12, 18:05 UTC50m

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

Mode-S 39A2E3 frequently asked

What is Mode-S code 39A2E3?
39A2E3 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HIXD.
Where is Mode-S 39A2E3 registered?
Mode-S code 39A2E3 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39A2E3 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 39A2E3, octal 16321343, decimal 3,777,251.
What flights does 39A2E3 operate?
Mode-S 39A2E3 has broadcast 5 distinct callsigns, including FPO172, FPO443, FPO444, FPO171, FPO162.