Apparatus

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sensors Mode-S transponder

39CF09

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF09
Octal
16347411
Decimal
3,788,553
Country
FR
Tail
F-HTYJ
Type
A359
No current signal · last broadcast 3h ago
Flights observed
153
Distinct callsigns
20
Country
FR
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 39CF09.

Country allocation

The ICAO 24-bit address 39CF09 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 20 distinct

Callsign Airline Flights Last seen
AFR431 Air France 8 2026-05-25
AFR579 - 6 2026-06-15
AFR407 - 6 2026-07-08
AFR253 - 6 2026-06-28
AFR430 Air France 5 2026-05-13
AFR406 - 5 2026-07-07
AFR578 - 4 2026-06-25
AFR468 Air France 4 2026-05-21
AFR416 - 4 2026-06-26
AFR258 - 4 2026-06-27
AFR199 - 4 2026-07-11
AFR194 Air France 4 2026-05-29
AFR179 - 4 2026-07-10
AFR178 - 4 2026-07-09
AFR097 Air France 4 2026-06-13
AFR096 Air France 4 2026-06-12
AFR722 Air France 3 2026-05-24
AFR435 - 3 2026-06-17
AFR415 - 3 2026-06-26
AFR198 - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AFR490 - Jul 13, 15:15 UTCJul 13, 23:45 UTC8h 30m
2026-07-12 AFR459 - Jul 12, 23:00 UTCJul 13, 09:25 UTC10h 25m
2026-07-12 AFR460 - Jul 12, 09:25 UTCJul 12, 20:40 UTC11h 15m
2026-07-11 AFR199 - Jul 11, 07:25 UTCJul 11, 17:20 UTC9h 55m
2026-07-11 AFR199 - Jul 11, 05:10 UTCJul 11, 05:55 UTC45m
2026-07-10 AFR198 - Jul 10, 15:15 UTCJul 11, 02:55 UTC11h 41m
2026-07-10 AFR179 - Jul 10, 01:45 UTCJul 10, 11:45 UTC10h 0m
2026-07-09 AFR178 - Jul 9, 11:50 UTCJul 9, 23:15 UTC11h 25m
2026-07-08 AFR407 - Jul 8, 17:30 UTCJul 9, 03:50 UTC10h 20m
2026-07-08 AFR407 - Jul 8, 14:40 UTCJul 8, 14:50 UTC10m
2026-07-07 AFR406 - Jul 7, 21:40 UTCJul 7, 23:05 UTC1h 25m
2026-07-07 AFR199 - Jul 7, 04:30 UTCJul 7, 16:20 UTC11h 50m
2026-07-06 AFR198 - Jul 6, 15:10 UTCJul 7, 01:40 UTC10h 30m
2026-07-06 AFR179 - Jul 6, 01:50 UTCJul 6, 11:50 UTC10h 0m
2026-07-05 AFR178 - Jul 5, 11:55 UTCJul 5, 23:00 UTC11h 5m
2026-07-04 AFR75K - Jul 4, 22:15 UTCJul 5, 05:20 UTC7h 5m
2026-07-04 AFR074 - Jul 4, 11:35 UTCJul 4, 19:45 UTC8h 10m
2026-07-01 AFR832 - Jul 1, 12:10 UTCJul 2, 05:35 UTC17h 25m
2026-06-30 AFR357E - Jun 30, 22:30 UTCJul 1, 05:10 UTC6h 40m
2026-06-30 AFR356G - Jun 30, 12:15 UTCJun 30, 19:45 UTC7h 30m
2026-06-29 AFR465 - Jun 29, 10:20 UTCJun 30, 06:00 UTC19h 41m
2026-06-29 AFR465 - Jun 29, 09:05 UTCJun 30, 06:00 UTC20h 56m
2026-06-28 AFR253 - Jun 28, 06:49 UTCJun 28, 16:35 UTC9h 45m
2026-06-27 AFR253 - Jun 27, 20:19 UTCJun 28, 16:35 UTC20h 15m
2026-06-27 AFR253 - Jun 27, 19:24 UTCJun 28, 16:35 UTC21h 10m
2026-06-27 AFR258 - Jun 27, 14:20 UTCJun 28, 13:19 UTC23h 0m
2026-06-27 AFR258 - Jun 27, 12:55 UTCJun 28, 12:15 UTC23h 20m
2026-06-26 AFR415 - Jun 26, 23:00 UTCJun 27, 07:10 UTC8h 10m
2026-06-26 AFR416 - Jun 26, 12:29 UTCJun 26, 20:44 UTC8h 15m
2026-06-25 AFR578 - Jun 25, 18:15 UTCJun 26, 08:00 UTC13h 45m
2026-06-25 AFR4081 YUL → CDG Jun 25, 06:30 UTCJun 25, 12:40 UTC6h 10m
2026-06-25 AFR064 CDG → EWR Jun 25, 01:40 UTCJun 25, 03:10 UTC1h 30m
2026-06-24 AFR064 CDG → EWR Jun 24, 19:34 UTCJun 25, 01:35 UTC6h 0m
2026-06-23 AFR253 - Jun 23, 22:19 UTCJun 24, 16:24 UTC18h 5m
2026-06-23 AFR253 - Jun 23, 20:19 UTCJun 24, 16:24 UTC20h 5m
2026-06-23 AFR253 - Jun 23, 19:59 UTCJun 24, 16:24 UTC20h 25m
2026-06-23 AFR258 - Jun 23, 14:19 UTCJun 24, 14:15 UTC23h 55m
2026-06-23 AFR258 - Jun 23, 13:29 UTCJun 24, 12:14 UTC22h 45m
2026-06-23 AFR349 YUL → CDG Jun 23, 04:09 UTCJun 23, 10:15 UTC6h 5m
2026-06-22 AFR348F CDG → YUL Jun 22, 18:04 UTCJun 23, 00:50 UTC6h 45m
2026-06-22 AFR173 - Jun 22, 04:30 UTCJun 22, 14:19 UTC9h 50m
2026-06-21 AFR174 - Jun 21, 14:34 UTCJun 22, 01:35 UTC11h 0m
2026-06-20 AFR971 LAD → CDG Jun 20, 20:20 UTCJun 21, 04:49 UTC8h 30m
2026-06-20 AFR972 CDG → LAD Jun 20, 09:29 UTCJun 20, 17:34 UTC8h 5m
2026-06-19 AFR159X DFW → CDG Jun 19, 21:49 UTCJun 20, 06:24 UTC8h 35m
2026-06-19 AFR158M - Jun 19, 08:34 UTCJun 19, 18:20 UTC9h 45m
2026-06-18 AFR331E BOS → CDG Jun 18, 02:00 UTCJun 18, 07:55 UTC5h 55m
2026-06-17 AFR332 - Jun 17, 16:00 UTCJun 17, 23:05 UTC7h 5m
2026-06-17 AFR435 - Jun 17, 04:10 UTCJun 17, 13:00 UTC8h 50m
2026-06-16 AFR436 - Jun 16, 14:09 UTCJun 16, 15:40 UTC1h 30m

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

Mode-S 39CF09 frequently asked

What is Mode-S code 39CF09?
39CF09 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYJ.
Where is Mode-S 39CF09 registered?
Mode-S code 39CF09 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF09 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF09, octal 16347411, decimal 3,788,553.
What flights does 39CF09 operate?
Mode-S 39CF09 has broadcast 20 distinct callsigns, including AFR431, AFR579, AFR407, AFR253, AFR430.