sensors Mode-S transponder

39D2B0

ICAO 24-bit transponder address · allocated to France

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

Hex
39D2B0
Octal
16351260
Decimal
3,789,488
Country
FR
Tail
F-HUVQ
Type
A359
Broadcasting now · callsign AFR490 · 40,000 ft
Flights observed
9
Distinct callsigns
3
Country
FR
Last broadcast
15h ago

Current position

39D2B0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 39D2B0 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
AFR136 - 4 2026-04-13
AFR832 - 3 2026-04-13
AFR137T Air France 2 2026-04-14

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR137T ORD → CDG Apr 14, 07:10 UTCApr 14, 07:30 UTC20m
2026-04-14 AFR137T ORD → CDG Apr 14, 06:00 UTCApr 14, 07:10 UTC1h 10m
2026-04-13 AFR136 - Apr 13, 19:50 UTCApr 13, 20:35 UTC45m
2026-04-13 AFR136 - Apr 13, 17:40 UTCApr 13, 20:10 UTC2h 30m
2026-04-13 AFR136 - Apr 13, 12:20 UTCApr 13, 13:40 UTC1h 20m
2026-04-13 AFR136 - Apr 13, 11:55 UTCApr 13, 12:15 UTC20m
2026-04-13 AFR832 - Apr 13, 04:20 UTCApr 13, 05:30 UTC1h 10m
2026-04-13 AFR832 - Apr 13, 03:55 UTCApr 13, 05:30 UTC1h 35m
2026-04-13 AFR832 - Apr 13, 02:55 UTCApr 13, 04:15 UTC1h 20m

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

Mode-S 39D2B0 frequently asked

What is Mode-S code 39D2B0?
39D2B0 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HUVQ.
Where is Mode-S 39D2B0 registered?
Mode-S code 39D2B0 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39D2B0 broadcasting right now?
Yes. Mode-S 39D2B0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39D2B0, octal 16351260, decimal 3,789,488.
What flights does 39D2B0 operate?
Mode-S 39D2B0 has broadcast 3 distinct callsigns, including AFR136, AFR832, AFR137T.