sensors Mode-S transponder

39A208

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HIQI · BOEING 737-800

Hex
39A208
Octal
16321010
Decimal
3,777,032
Country
FR
Tail
F-HIQI
Type
B738
Broadcasting now · callsign FPO6RB · 39,000 ft
Flights observed
5
Distinct callsigns
2
Country
FR
Last broadcast
20h ago

Current position

39A208 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 39A208 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
FPO6RB - 3 2026-04-14
FPO8RB Europe Airpost 2 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-14 FPO6RB - Apr 14, 05:15 UTCApr 14, 05:35 UTC20m
2026-04-13 FPO8RB ORB → GOT Apr 13, 20:50 UTCApr 13, 22:20 UTC1h 30m
2026-04-13 FPO8RB ORB → GOT Apr 13, 18:45 UTCApr 13, 19:35 UTC50m
2026-04-12 FPO6RB - Apr 12, 19:50 UTCApr 12, 20:15 UTC25m
2026-04-12 FPO6RB - Apr 12, 17:15 UTCApr 12, 18:15 UTC1h 0m

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

Mode-S 39A208 frequently asked

What is Mode-S code 39A208?
39A208 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HIQI.
Where is Mode-S 39A208 registered?
Mode-S code 39A208 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39A208 broadcasting right now?
Yes. Mode-S 39A208 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39A208, octal 16321010, decimal 3,777,032.
What flights does 39A208 operate?
Mode-S 39A208 has broadcast 2 distinct callsigns, including FPO6RB, FPO8RB.