sensors Mode-S transponder

39CF10

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF10
Octal
16347420
Decimal
3,788,560
Country
FR
Tail
F-HTYQ
Type
A359
Broadcasting now · callsign AFR195 · 36,000 ft
Flights observed
7
Distinct callsigns
2
Country
FR
Last broadcast
22h ago

Current position

39CF10 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 39CF10 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
AFR194 Air France 4 2026-04-13
AFR191 Air France 3 2026-04-14

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR191 BLR → CDG Apr 14, 05:15 UTCApr 14, 06:50 UTC1h 35m
2026-04-13 AFR191 BLR → CDG Apr 13, 22:30 UTCApr 13, 22:40 UTC10m
2026-04-13 AFR191 BLR → CDG Apr 13, 20:45 UTCApr 13, 20:55 UTC10m
2026-04-13 AFR194 CDG → BLR Apr 13, 18:05 UTCApr 13, 18:20 UTC15m
2026-04-13 AFR194 CDG → BLR Apr 13, 16:25 UTCApr 13, 16:35 UTC10m
2026-04-13 AFR194 CDG → BLR Apr 13, 12:45 UTCApr 13, 13:25 UTC40m
2026-04-13 AFR194 CDG → BLR Apr 13, 09:05 UTCApr 13, 11:45 UTC2h 40m

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

Mode-S 39CF10 frequently asked

What is Mode-S code 39CF10?
39CF10 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYQ.
Where is Mode-S 39CF10 registered?
Mode-S code 39CF10 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF10 broadcasting right now?
Yes. Mode-S 39CF10 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF10, octal 16347420, decimal 3,788,560.
What flights does 39CF10 operate?
Mode-S 39CF10 has broadcast 2 distinct callsigns, including AFR194, AFR191.