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 9h ago
Flights observed
188
Distinct callsigns
20
Country
FR
Last broadcast
9h ago

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 - 8 2026-07-11
AFR435 Air France 7 2026-06-11
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
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
AFR264 Air France 4 2026-05-23
AFR258 - 4 2026-06-20
AFR191 Air France 4 2026-05-12
AFR097 - 4 2026-06-16
AFR096 - 4 2026-06-15
AFR75K - 3 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR934 - Jul 14, 10:15 UTCJul 14, 13:55 UTC3h 40m
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
2026-07-03 AFR52X - Jul 3, 16:15 UTCJul 4, 00:15 UTC8h 0m
2026-07-03 AFR179 - Jul 3, 01:30 UTCJul 3, 11:40 UTC10h 10m
2026-07-02 AFR178 - Jul 2, 11:45 UTCJul 2, 22:50 UTC11h 5m
2026-07-01 AFR75K - Jul 1, 23:10 UTCJul 2, 06:25 UTC7h 15m
2026-07-01 AFR074 - Jul 1, 12:15 UTCJul 1, 20:20 UTC8h 5m
2026-06-30 AFR511 - Jun 30, 22:40 UTCJul 1, 09:10 UTC10h 30m
2026-06-30 AFR512 - Jun 30, 09:10 UTCJun 30, 20:00 UTC10h 50m
2026-06-29 AFR75K - Jun 29, 22:19 UTCJun 30, 05:15 UTC6h 56m
2026-06-29 AFR074 - Jun 29, 11:25 UTCJun 29, 19:29 UTC8h 5m
2026-06-28 AFR415 - Jun 28, 23:20 UTCJun 29, 07:40 UTC8h 20m
2026-06-28 AFR416 - Jun 28, 12:19 UTCJun 28, 20:59 UTC8h 40m
2026-06-27 AFR75K - Jun 27, 23:45 UTCJun 28, 06:44 UTC7h 0m
2026-06-27 AFR074 - Jun 27, 12:25 UTCJun 27, 20:34 UTC8h 10m
2026-06-26 AFR337P SEA → CDG Jun 26, 20:44 UTCJun 27, 05:59 UTC9h 15m
2026-06-26 AFR338 - Jun 26, 09:00 UTCJun 26, 18:15 UTC9h 15m
2026-06-25 AFR860 - Jun 25, 15:15 UTCJun 26, 05:50 UTC14h 35m
2026-06-24 AFR685 CDG → ATL Jun 24, 21:50 UTCJun 25, 11:50 UTC14h 0m
2026-06-24 AFR199 - Jun 24, 05:40 UTCJun 24, 18:09 UTC12h 30m
2026-06-23 AFR198 - Jun 23, 15:15 UTCJun 24, 00:30 UTC9h 15m
2026-06-23 AFR179 - Jun 23, 01:54 UTCJun 23, 11:45 UTC9h 50m
2026-06-22 AFR178 - Jun 22, 12:00 UTCJun 22, 23:05 UTC11h 5m
2026-06-20 AFR258 - Jun 20, 18:54 UTCJun 21, 14:24 UTC19h 30m
2026-06-20 AFR258 - Jun 20, 16:05 UTCJun 21, 14:24 UTC22h 20m
2026-06-20 AFR258 - Jun 20, 14:50 UTCJun 21, 13:59 UTC23h 10m
2026-06-20 AFR349 YUL → CDG Jun 20, 02:44 UTCJun 20, 08:49 UTC6h 5m
2026-06-19 AFR348F CDG → YUL Jun 19, 17:19 UTCJun 20, 00:04 UTC6h 45m
2026-06-19 AFR081 - Jun 19, 04:10 UTCJun 19, 14:19 UTC10h 10m
2026-06-18 AFR82M - Jun 18, 14:30 UTCJun 19, 01:10 UTC10h 39m
2026-06-18 AFR65F EWR → CDG Jun 18, 04:40 UTCJun 18, 11:05 UTC6h 25m

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 9h ago.
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, AFR871, AFR436.