Apparatus

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sensors Mode-S transponder

39CF04

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF04
Octal
16347404
Decimal
3,788,548
Country
FR
Tail
F-HTYE
Type
A359
Transponder active on ground
Flights observed
132
Distinct callsigns
20
Country
FR
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S 39CF04.

Country allocation

The ICAO 24-bit address 39CF04 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
AFR435 Air France 11 2026-07-26
AFR935 - 9 2026-07-08
AFR436 Air France 9 2026-07-25
AFR407 - 5 2026-06-22
AFR338 - 4 2026-07-19
AFR337P - 4 2026-07-19
AFR258 Air France 4 2026-05-26
AFR53X - 3 2026-07-11
AFR52X - 3 2026-07-10
AFR406 - 3 2026-06-21
AFR348F Air France 3 2026-07-26
AFR253 Air France 3 2026-05-23
AFR174 - 3 2026-06-28
AFR173 - 3 2026-06-29
AFR064 - 3 2026-07-15
AFR934 Air France 2 2026-07-23
AFR75K Air France 2 2026-07-20
AFR754 Air France 2 2026-05-28
AFR57J - 2 2026-07-14
AFR579 - 2 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR348F CDG → YUL Jul 26, 17:00 UTCJul 26, 23:00 UTC6h 0m
2026-07-26 AFR435 MEX → CDG Jul 26, 03:00 UTCJul 26, 12:40 UTC9h 41m
2026-07-25 AFR436 CDG → BOG Jul 25, 23:15 UTCJul 25, 23:35 UTC20m
2026-07-25 AFR436 CDG → BOG Jul 25, 14:05 UTCJul 25, 22:20 UTC8h 15m
2026-07-24 AFR415 FOR → CDG Jul 24, 23:55 UTCJul 25, 08:05 UTC8h 10m
2026-07-24 AFR416 CDG → FOR Jul 24, 13:15 UTCJul 24, 21:45 UTC8h 30m
2026-07-23 AFR934 CDG → TNR Jul 23, 09:45 UTCJul 23, 12:25 UTC2h 40m
2026-07-22 AFR333F BOS → CDG Jul 22, 21:55 UTCJul 23, 04:10 UTC6h 15m
2026-07-22 AFR334M CDG → BOS Jul 22, 11:40 UTCJul 22, 18:35 UTC6h 55m
2026-07-21 AFR375G YVR → CDG Jul 21, 21:50 UTCJul 22, 05:25 UTC7h 35m
2026-07-21 AFR374F CDG → YVR Jul 21, 10:10 UTCJul 21, 19:45 UTC9h 35m
2026-07-20 AFR75K RDU → CDG Jul 20, 22:40 UTCJul 21, 05:55 UTC7h 15m
2026-07-20 AFR074 - Jul 20, 11:55 UTCJul 20, 20:15 UTC8h 20m
2026-07-19 AFR337P - Jul 19, 20:50 UTCJul 20, 05:50 UTC9h 0m
2026-07-19 AFR338 - Jul 19, 08:45 UTCJul 19, 18:20 UTC9h 35m
2026-07-18 AFR375G YVR → CDG Jul 18, 20:35 UTCJul 19, 05:10 UTC8h 35m
2026-07-18 AFR374F CDG → YVR Jul 18, 08:50 UTCJul 18, 18:25 UTC9h 35m
2026-07-17 AFR199 - Jul 17, 05:25 UTCJul 17, 16:55 UTC11h 30m
2026-07-16 AFR198 - Jul 16, 15:00 UTCJul 17, 02:54 UTC11h 55m
2026-07-16 AFR65F EWR → CDG Jul 16, 04:50 UTCJul 16, 11:15 UTC6h 25m
2026-07-15 AFR064 - Jul 15, 18:00 UTCJul 16, 01:25 UTC7h 25m
2026-07-15 AFR097 MCO → CDG Jul 15, 03:00 UTCJul 15, 11:15 UTC8h 15m
2026-07-14 AFR096 - Jul 14, 15:25 UTCJul 15, 00:05 UTC8h 39m
2026-07-14 AFR57J - Jul 14, 02:45 UTCJul 14, 12:25 UTC9h 40m
2026-07-13 AFR56T - Jul 13, 13:25 UTCJul 13, 23:45 UTC10h 20m
2026-07-13 AFR349 YUL → CDG Jul 13, 03:25 UTCJul 13, 09:40 UTC6h 15m
2026-07-12 AFR348F - Jul 12, 16:45 UTCJul 12, 23:25 UTC6h 40m
2026-07-12 AFR435 - Jul 12, 10:45 UTCJul 12, 13:01 UTC2h 15m
2026-07-12 AFR435 - Jul 12, 03:20 UTCJul 12, 03:30 UTC10m
2026-07-11 AFR436 - Jul 11, 14:40 UTCJul 12, 00:25 UTC9h 45m
2026-07-11 AFR53X IAD → CDG Jul 11, 02:05 UTCJul 11, 09:00 UTC6h 55m
2026-07-10 AFR52X - Jul 10, 15:40 UTCJul 10, 23:55 UTC8h 15m
2026-07-10 AFR349 YUL → CDG Jul 10, 02:55 UTCJul 10, 09:00 UTC6h 5m
2026-07-09 AFR348F - Jul 9, 16:50 UTCJul 9, 23:55 UTC7h 5m
2026-07-09 AFR33J - Jul 9, 00:40 UTCJul 9, 08:30 UTC7h 50m
2026-07-08 AFR32J - Jul 8, 13:45 UTCJul 8, 22:15 UTC8h 30m
2026-07-08 AFR935 - Jul 8, 07:20 UTCJul 8, 10:30 UTC3h 10m
2026-07-07 AFR935 - Jul 7, 13:05 UTCJul 8, 10:30 UTC21h 25m
2026-07-07 AFR935 - Jul 7, 11:10 UTCJul 8, 10:30 UTC23h 20m
2026-07-07 AFR75K - Jul 7, 00:45 UTCJul 7, 07:55 UTC7h 10m
2026-07-06 AFR074 - Jul 6, 12:40 UTCJul 6, 20:55 UTC8h 15m
2026-07-06 AFR935 - Jul 6, 05:55 UTCJul 6, 09:20 UTC3h 25m
2026-07-05 AFR935 - Jul 5, 11:05 UTCJul 6, 09:20 UTC22h 15m
2026-07-05 AFR935 - Jul 5, 09:35 UTCJul 6, 09:00 UTC23h 25m
2026-07-03 AFR579A - Jul 3, 17:35 UTCJul 4, 07:40 UTC14h 5m
2026-07-02 AFR435 - Jul 2, 22:55 UTCJul 3, 14:35 UTC15h 40m
2026-07-02 AFR436 - Jul 2, 15:05 UTCJul 3, 14:35 UTC23h 30m
2026-07-02 AFR4085 JFK → CDG Jul 2, 05:50 UTCJul 2, 12:20 UTC6h 30m
2026-07-01 AFR064 - Jul 1, 19:10 UTCJul 2, 02:45 UTC7h 35m
2026-07-01 AFR4087 SEA → CDG Jul 1, 05:30 UTCJul 1, 12:00 UTC6h 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-HTYE page for operator, model, and routing details .

Mode-S 39CF04 frequently asked

What is Mode-S code 39CF04?
39CF04 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYE.
Where is Mode-S 39CF04 registered?
Mode-S code 39CF04 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF04 broadcasting right now?
Mode-S 39CF04 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF04, octal 16347404, decimal 3,788,548.
What flights does 39CF04 operate?
Mode-S 39CF04 has broadcast 20 distinct callsigns, including AFR435, AFR935, AFR436, AFR407, AFR338.