sensors Mode-S transponder

39CF0F

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF0F
Octal
16347417
Decimal
3,788,559
Country
FR
Tail
F-HTYP
Type
A359
No current signal · last broadcast 13h ago
Flights observed
9
Distinct callsigns
4
Country
FR
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 39CF0F.

Country allocation

The ICAO 24-bit address 39CF0F 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 4 distinct

Callsign Airline Flights Last seen
AFR096 - 4 2026-04-13
AFR191 Air France 3 2026-04-13
AFR194 Air France 1 2026-04-12
AFR097 - 1 2026-04-14

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-14 AFR097 - Apr 14, 10:00 UTCApr 14, 11:05 UTC1h 5m
2026-04-13 AFR096 - Apr 13, 23:20 UTCApr 13, 23:40 UTC20m
2026-04-13 AFR096 - Apr 13, 16:15 UTCApr 13, 16:40 UTC25m
2026-04-13 AFR096 - Apr 13, 15:50 UTCApr 13, 16:40 UTC50m
2026-04-13 AFR096 - Apr 13, 15:00 UTCApr 13, 16:15 UTC1h 15m
2026-04-13 AFR191 BLR → CDG Apr 13, 04:20 UTCApr 13, 06:25 UTC2h 5m
2026-04-13 AFR191 BLR → CDG Apr 13, 03:55 UTCApr 13, 06:25 UTC2h 30m
2026-04-13 AFR191 BLR → CDG Apr 13, 01:35 UTCApr 13, 04:15 UTC2h 40m
2026-04-12 AFR194 CDG → BLR Apr 12, 17:45 UTCApr 12, 18:05 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-HTYP page for operator, model, and routing details .

Mode-S 39CF0F frequently asked

What is Mode-S code 39CF0F?
39CF0F is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYP.
Where is Mode-S 39CF0F registered?
Mode-S code 39CF0F is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF0F broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF0F, octal 16347417, decimal 3,788,559.
What flights does 39CF0F operate?
Mode-S 39CF0F has broadcast 4 distinct callsigns, including AFR096, AFR191, AFR194, AFR097.