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
No current signal · last broadcast 15h ago
Flights observed
88
Distinct callsigns
20
Country
FR
Last broadcast
15h 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 - 8 2026-07-02
AFR436 - 6 2026-07-02
AFR407 - 5 2026-06-22
AFR258 Air France 4 2026-05-26
AFR935 - 3 2026-06-26
AFR406 - 3 2026-06-21
AFR338 - 3 2026-06-23
AFR337P - 3 2026-06-23
AFR253 Air France 3 2026-05-23
AFR174 - 3 2026-06-28
AFR173 - 3 2026-06-29
AFR754 Air France 2 2026-05-28
AFR579 - 2 2026-06-13
AFR578 - 2 2026-06-26
AFR53X Air France 2 2026-06-20
AFR52X - 2 2026-06-19
AFR491 - 2 2026-06-18
AFR430 Air France 2 2026-05-16
AFR264 - 2 2026-06-21
AFR11E Air France 2 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-30 AFR064 CDG → EWR Jun 30, 19:15 UTCJul 1, 02:55 UTC7h 40m
2026-06-29 AFR684 CDG → RUH Jun 29, 21:39 UTCJun 30, 11:40 UTC14h 1m
2026-06-29 AFR173 - Jun 29, 04:50 UTCJun 29, 14:54 UTC10h 5m
2026-06-28 AFR174 - Jun 28, 14:25 UTCJun 29, 01:50 UTC11h 25m
2026-06-28 AFR57J LAS → CDG Jun 28, 01:04 UTCJun 28, 10:50 UTC9h 45m
2026-06-27 AFR56T - Jun 27, 12:04 UTCJun 27, 22:15 UTC10h 10m
2026-06-26 AFR578 - Jun 26, 17:00 UTCJun 27, 07:19 UTC14h 20m
2026-06-26 AFR935 - Jun 26, 06:19 UTCJun 26, 09:20 UTC3h 0m
2026-06-25 AFR935 - Jun 25, 13:29 UTCJun 26, 09:20 UTC19h 50m
2026-06-25 AFR935 - Jun 25, 11:04 UTCJun 26, 09:20 UTC22h 15m
2026-06-25 AFR934 - Jun 25, 09:59 UTCJun 26, 09:00 UTC23h 0m
2026-06-24 AFR848 - Jun 24, 11:24 UTCJun 25, 05:25 UTC18h 0m
2026-06-23 AFR337P - Jun 23, 21:29 UTCJun 24, 06:35 UTC9h 5m
2026-06-23 AFR338 - Jun 23, 09:24 UTCJun 23, 18:45 UTC9h 20m
2026-06-22 AFR407 - Jun 22, 16:34 UTCJun 23, 03:39 UTC11h 5m
2026-06-21 AFR406 - Jun 21, 22:29 UTCJun 22, 01:35 UTC3h 5m
2026-06-21 AFR267 - Jun 21, 03:30 UTCJun 21, 16:59 UTC13h 30m
2026-06-21 AFR264 - Jun 21, 00:04 UTCJun 21, 00:34 UTC30m
2026-06-20 AFR264 - Jun 20, 13:24 UTCJun 20, 23:19 UTC9h 55m
2026-06-20 AFR53X IAD → CDG Jun 20, 02:29 UTCJun 20, 09:05 UTC6h 35m
2026-06-19 AFR52X - Jun 19, 16:25 UTCJun 20, 00:14 UTC7h 50m
2026-06-18 AFR491 - Jun 18, 22:25 UTCJun 19, 13:04 UTC14h 39m
2026-06-18 AFR491 - Jun 18, 15:05 UTCJun 19, 13:04 UTC21h 59m
2026-06-18 AFR490 - Jun 18, 14:45 UTCJun 19, 12:59 UTC22h 14m
2026-06-17 AFR337P - Jun 17, 20:55 UTCJun 18, 06:00 UTC9h 5m
2026-06-17 AFR338 CDG → SEA Jun 17, 08:35 UTCJun 17, 17:50 UTC9h 15m
2026-06-16 AFR085 SFO → CDG Jun 16, 05:55 UTCJun 16, 16:15 UTC10h 20m
2026-06-15 AFR086 CDG → SFO Jun 15, 16:30 UTCJun 16, 02:50 UTC10h 20m
2026-06-15 AFR435 - Jun 15, 04:10 UTCJun 15, 12:39 UTC8h 30m
2026-06-14 AFR436 - Jun 14, 14:25 UTCJun 15, 00:49 UTC10h 24m
2026-06-13 AFR579 - Jun 13, 17:45 UTCJun 14, 07:40 UTC13h 55m
2026-06-13 AFR173 MEX → CDG Jun 13, 04:40 UTCJun 13, 14:50 UTC10h 10m
2026-06-12 AFR174 - Jun 12, 14:35 UTCJun 13, 01:45 UTC11h 10m
2026-06-11 AFR407 - Jun 11, 16:45 UTCJun 12, 04:00 UTC11h 15m
2026-06-11 AFR407 SCL → CDG Jun 11, 14:55 UTCJun 11, 15:05 UTC10m
2026-06-10 AFR406 CDG → SCL Jun 10, 22:25 UTCJun 11, 00:20 UTC1h 55m
2026-06-09 AFR579 CKY → CDG Jun 9, 16:45 UTCJun 10, 06:05 UTC13h 20m
2026-06-09 AFR53X IAD → CDG Jun 9, 01:45 UTCJun 9, 08:40 UTC6h 55m
2026-06-08 AFR52X CDG → IAD Jun 8, 15:35 UTCJun 8, 23:05 UTC7h 30m
2026-06-08 AFR179 MEX → CDG Jun 8, 01:45 UTCJun 8, 12:00 UTC10h 15m
2026-06-07 AFR178 CDG → MEX Jun 7, 12:05 UTCJun 7, 23:05 UTC11h 0m
2026-06-06 AFR069 PHX → CDG Jun 6, 22:30 UTCJun 7, 08:15 UTC9h 45m
2026-06-06 AFR068 CDG → PHX Jun 6, 09:24 UTCJun 6, 19:34 UTC10h 10m
2026-06-05 AFR578 CDG → CKY Jun 5, 16:40 UTCJun 6, 06:10 UTC13h 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?
No active broadcast right now. Last signal was 15h ago.
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, AFR436, AFR407, AFR258, AFR935.