Apparatus

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sensors Mode-S transponder

39CF08

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF08
Octal
16347410
Decimal
3,788,552
Country
FR
Tail
F-HTYI
Type
A359
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
217
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 39CF08.

Country allocation

The ICAO 24-bit address 39CF08 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
AFR407 - 12 2026-07-12
AFR406 Air France 9 2026-07-26
AFR435 Air France 7 2026-06-11
AFR258 Air France 6 2026-07-25
AFR871 Air France 5 2026-04-21
AFR436 Air France 5 2026-06-10
AFR174 - 5 2026-07-10
AFR173 - 5 2026-07-11
AFR012 Air France 5 2026-04-23
AFR868 Air France 4 2026-04-21
AFR52X - 4 2026-07-09
AFR491 Air France 4 2026-07-21
AFR477 Air France 4 2026-05-31
AFR468 Air France 4 2026-05-30
AFR378E Air France 4 2026-04-15
AFR377 Air France 4 2026-04-16
AFR33J Air France 4 2026-07-20
AFR338 - 4 2026-07-16
AFR337P - 4 2026-07-16
AFR334M - 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR406 CDG → SCL Jul 26, 21:30 UTCJul 26, 22:00 UTC30m
2026-07-25 AFR253 SGN → CDG Jul 25, 20:05 UTCJul 26, 15:30 UTC19h 26m
2026-07-25 AFR253 SGN → CDG Jul 25, 18:50 UTCJul 26, 15:30 UTC20h 41m
2026-07-25 AFR253 SGN → CDG Jul 25, 16:05 UTCJul 26, 15:30 UTC23h 26m
2026-07-25 AFR258 CDG → SGN Jul 25, 14:05 UTCJul 26, 14:00 UTC23h 56m
2026-07-25 AFR258 CDG → SGN Jul 25, 12:20 UTCJul 26, 12:00 UTC23h 41m
2026-07-25 AFR349 YUL → CDG Jul 25, 02:50 UTCJul 25, 08:55 UTC6h 5m
2026-07-24 AFR348F CDG → YUL Jul 24, 16:50 UTCJul 24, 23:30 UTC6h 40m
2026-07-24 AFR179 MEX → CDG Jul 24, 01:30 UTCJul 24, 11:45 UTC10h 15m
2026-07-23 AFR178 CDG → MEX Jul 23, 11:35 UTCJul 23, 21:55 UTC10h 20m
2026-07-23 AFR551 CAI → CDG Jul 23, 01:05 UTCJul 23, 05:25 UTC4h 20m
2026-07-22 AFR570 CDG → CAI Jul 22, 18:35 UTCJul 22, 22:10 UTC3h 35m
2026-07-21 AFR491 CDG → PUJ Jul 21, 22:00 UTCJul 22, 13:10 UTC15h 10m
2026-07-21 AFR491 CDG → PUJ Jul 21, 14:15 UTCJul 22, 13:10 UTC22h 55m
2026-07-20 AFR333F BOS → CDG Jul 20, 21:35 UTCJul 21, 03:35 UTC6h 0m
2026-07-20 AFR334M - Jul 20, 11:55 UTCJul 20, 18:55 UTC7h 0m
2026-07-20 AFR33J ATL → CDG Jul 20, 03:25 UTCJul 20, 08:45 UTC5h 20m
2026-07-20 AFR33J ATL → CDG Jul 20, 00:45 UTCJul 20, 03:20 UTC2h 35m
2026-07-19 AFR32J - Jul 19, 12:45 UTCJul 19, 21:25 UTC8h 40m
2026-07-18 AFR159X DFW → CDG Jul 18, 21:25 UTCJul 19, 06:10 UTC8h 45m
2026-07-18 AFR158M - Jul 18, 09:20 UTCJul 18, 18:35 UTC9h 15m
2026-07-17 AFR333F BOS → CDG Jul 17, 21:55 UTCJul 18, 04:05 UTC6h 11m
2026-07-17 AFR334M - Jul 17, 11:50 UTCJul 17, 18:40 UTC6h 50m
2026-07-16 AFR337P - Jul 16, 22:55 UTCJul 17, 08:00 UTC9h 5m
2026-07-16 AFR338 - Jul 16, 09:15 UTCJul 16, 18:55 UTC9h 40m
2026-07-15 AFR333F BOS → CDG Jul 15, 22:15 UTCJul 16, 04:20 UTC6h 5m
2026-07-15 AFR334M - Jul 15, 12:40 UTCJul 15, 19:30 UTC6h 50m
2026-07-15 AFR935 - Jul 15, 05:25 UTCJul 15, 09:35 UTC4h 10m
2026-07-14 AFR935 - Jul 14, 12:05 UTCJul 15, 09:35 UTC21h 29m
2026-07-14 AFR935 - Jul 14, 10:15 UTCJul 15, 09:35 UTC23h 19m
2026-07-13 AFR337P SEA → CDG Jul 13, 21:35 UTCJul 14, 06:15 UTC8h 40m
2026-07-13 AFR338 CDG → SEA Jul 13, 09:25 UTCJul 13, 19:00 UTC9h 35m
2026-07-12 AFR407 - Jul 12, 17:05 UTCJul 13, 03:25 UTC10h 20m
2026-07-12 AFR407 - Jul 12, 14:15 UTCJul 12, 14:25 UTC10m
2026-07-11 AFR406 - Jul 11, 21:45 UTCJul 11, 23:15 UTC1h 30m
2026-07-11 AFR173 - Jul 11, 04:25 UTCJul 11, 14:30 UTC10h 5m
2026-07-10 AFR174 - Jul 10, 14:45 UTCJul 11, 01:45 UTC11h 0m
2026-07-10 AFR53X IAD → CDG Jul 10, 01:55 UTCJul 10, 08:40 UTC6h 45m
2026-07-09 AFR52X - Jul 9, 15:20 UTCJul 9, 23:35 UTC8h 15m
2026-07-09 AFR65F - Jul 9, 04:35 UTCJul 9, 11:15 UTC6h 40m
2026-07-08 AFR064 - Jul 8, 18:10 UTCJul 9, 01:30 UTC7h 20m
2026-07-08 AFR173 - Jul 8, 04:25 UTCJul 8, 14:30 UTC10h 5m
2026-07-07 AFR174 - Jul 7, 14:20 UTCJul 8, 01:15 UTC10h 55m
2026-07-07 AFR57J LAS → CDG Jul 7, 01:10 UTCJul 7, 10:40 UTC9h 30m
2026-07-06 AFR56T CDG → LAS Jul 6, 12:10 UTCJul 6, 22:55 UTC10h 45m
2026-07-05 AFR337P SEA → CDG Jul 5, 20:55 UTCJul 6, 06:00 UTC9h 5m
2026-07-05 AFR338 - Jul 5, 08:50 UTCJul 5, 18:30 UTC9h 40m
2026-07-04 AFR333F - Jul 4, 22:05 UTCJul 5, 04:05 UTC6h 0m
2026-07-04 AFR334M - Jul 4, 12:20 UTCJul 4, 19:30 UTC7h 10m
2026-07-04 AFR53X - Jul 4, 02:25 UTCJul 4, 09:10 UTC6h 45m

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

Mode-S 39CF08 frequently asked

What is Mode-S code 39CF08?
39CF08 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYI.
Where is Mode-S 39CF08 registered?
Mode-S code 39CF08 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF08 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF08, octal 16347410, decimal 3,788,552.
What flights does 39CF08 operate?
Mode-S 39CF08 has broadcast 20 distinct callsigns, including AFR407, AFR406, AFR435, AFR258, AFR871.