sensors Mode-S transponder

39CF11

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF11
Octal
16347421
Decimal
3,788,561
Country
FR
Tail
F-HTYR
Type
A359
No current signal · last broadcast 12h ago
Flights observed
6
Distinct callsigns
3
Country
FR
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 39CF11.

Country allocation

The ICAO 24-bit address 39CF11 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
AFR267 - 4 2026-04-13
AFR264 Air France 1 2026-04-13
AFR194 Air France 1 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR194 CDG → BLR Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-13 AFR267 - Apr 13, 15:50 UTCApr 13, 16:15 UTC25m
2026-04-13 AFR267 - Apr 13, 12:20 UTCApr 13, 16:15 UTC3h 55m
2026-04-13 AFR267 - Apr 13, 12:00 UTCApr 13, 12:15 UTC15m
2026-04-13 AFR267 - Apr 13, 02:55 UTCApr 13, 03:05 UTC10m
2026-04-13 AFR264 CDG → ICN Apr 13, 00:05 UTCApr 13, 00:25 UTC20m

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

Mode-S 39CF11 frequently asked

What is Mode-S code 39CF11?
39CF11 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYR.
Where is Mode-S 39CF11 registered?
Mode-S code 39CF11 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF11 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF11, octal 16347421, decimal 3,788,561.
What flights does 39CF11 operate?
Mode-S 39CF11 has broadcast 3 distinct callsigns, including AFR267, AFR264, AFR194.