Apparatus

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sensors Mode-S transponder

39CF0B

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF0B
Octal
16347413
Decimal
3,788,555
Country
FR
Tail
F-HTYL
Type
A359
No current signal · last broadcast Jul 23, 06:55 UTC
Flights observed
189
Distinct callsigns
20
Country
FR
Last broadcast
Jul 23, 06:55 UTC

Last known position

Most recent position reported by Mode-S 39CF0B.

Country allocation

The ICAO 24-bit address 39CF0B 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 - 15 2026-07-18
AFR436 Air France 12 2026-07-17
AFR491 Air France 10 2026-07-20
AFR57J - 6 2026-07-05
AFR332 - 6 2026-06-27
AFR331E - 6 2026-06-28
AFR56T - 5 2026-07-04
AFR490 Air France 5 2026-07-20
AFR468 Air France 5 2026-04-17
AFR431 Air France 5 2026-05-30
AFR375G - 5 2026-06-29
AFR374F - 5 2026-06-29
AFR194 Air France 5 2026-04-16
AFR407 - 4 2026-07-09
AFR253 Air France 4 2026-04-28
AFR191 Air France 4 2026-04-17
AFR11E Air France 4 2026-06-04
AFR097 - 4 2026-07-12
AFR096 - 4 2026-07-11
AFR012 Air France 4 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 AFR4081 YUL → CDG Jul 23, 00:35 UTCJul 23, 06:55 UTC6h 20m
2026-07-21 AFR348F - Jul 21, 17:00 UTCJul 22, 00:00 UTC7h 0m
2026-07-20 AFR491 CDG → PUJ Jul 20, 22:00 UTCJul 21, 13:40 UTC15h 39m
2026-07-20 AFR491 CDG → PUJ Jul 20, 14:50 UTCJul 21, 13:40 UTC22h 49m
2026-07-20 AFR490 CDG → PTY Jul 20, 14:35 UTCJul 21, 12:45 UTC22h 10m
2026-07-20 AFR935 - Jul 20, 05:05 UTCJul 20, 09:00 UTC3h 55m
2026-07-19 AFR935 - Jul 19, 10:50 UTCJul 20, 09:00 UTC22h 10m
2026-07-19 AFR935 - Jul 19, 08:55 UTCJul 20, 08:45 UTC23h 50m
2026-07-18 AFR578 CDG → CKY Jul 18, 15:55 UTCJul 19, 05:50 UTC13h 55m
2026-07-18 AFR435 - Jul 18, 03:35 UTCJul 18, 13:05 UTC9h 30m
2026-07-17 AFR436 CDG → BOG Jul 17, 14:24 UTCJul 18, 00:19 UTC9h 55m
2026-07-16 AFR578 - Jul 16, 16:15 UTCJul 17, 06:29 UTC14h 15m
2026-07-16 AFR435 - Jul 16, 11:15 UTCJul 16, 12:49 UTC1h 35m
2026-07-15 AFR436 - Jul 15, 14:10 UTCJul 16, 00:15 UTC10h 5m
2026-07-15 AFR53X - Jul 15, 02:00 UTCJul 15, 09:05 UTC7h 5m
2026-07-14 AFR52X - Jul 14, 15:40 UTCJul 14, 23:10 UTC7h 29m
2026-07-14 AFR4081 YUL → CDG Jul 14, 05:50 UTCJul 14, 12:10 UTC6h 20m
2026-07-13 AFR348F - Jul 13, 21:00 UTCJul 14, 03:35 UTC6h 35m
2026-07-13 AFR199 - Jul 13, 05:45 UTCJul 13, 07:01 UTC1h 15m
2026-07-12 AFR198 - Jul 12, 15:25 UTCJul 13, 03:01 UTC11h 35m
2026-07-12 AFR097 - Jul 12, 03:25 UTCJul 12, 11:25 UTC8h 0m
2026-07-11 AFR096 - Jul 11, 15:20 UTCJul 11, 23:55 UTC8h 35m
2026-07-11 AFR179 - Jul 11, 01:40 UTCJul 11, 11:45 UTC10h 5m
2026-07-10 AFR178 - Jul 10, 11:50 UTCJul 10, 22:45 UTC10h 55m
2026-07-09 AFR407 - Jul 9, 17:40 UTCJul 10, 03:45 UTC10h 5m
2026-07-09 AFR407 - Jul 9, 14:50 UTCJul 9, 15:00 UTC10m
2026-07-08 AFR406 - Jul 8, 22:00 UTCJul 9, 01:15 UTC3h 15m
2026-07-08 AFR199 - Jul 8, 06:00 UTCJul 8, 18:25 UTC12h 25m
2026-07-07 AFR198 - Jul 7, 15:45 UTCJul 8, 03:25 UTC11h 40m
2026-07-07 AFR435 - Jul 7, 11:25 UTCJul 7, 12:55 UTC1h 30m
2026-07-06 AFR436 - Jul 6, 14:00 UTCJul 6, 23:40 UTC9h 40m
2026-07-06 AFR097 - Jul 6, 02:55 UTCJul 6, 10:55 UTC8h 0m
2026-07-05 AFR096 - Jul 5, 15:00 UTCJul 5, 23:45 UTC8h 45m
2026-07-05 AFR57J - Jul 5, 01:30 UTCJul 5, 11:15 UTC9h 45m
2026-07-04 AFR56T - Jul 4, 12:30 UTCJul 4, 22:50 UTC10h 20m
2026-07-03 AFR934 - Jul 3, 09:45 UTCJul 3, 13:10 UTC3h 25m
2026-07-02 AFR337P SEA → CDG Jul 2, 21:30 UTCJul 3, 06:35 UTC9h 5m
2026-07-02 AFR338 - Jul 2, 09:15 UTCJul 2, 18:35 UTC9h 20m
2026-07-01 AFR384V - Jul 1, 21:30 UTCJul 1, 22:40 UTC1h 10m
2026-06-30 AFR376V CDG → HHN Jun 30, 08:15 UTCJun 30, 09:15 UTC1h 0m
2026-06-29 AFR375G - Jun 29, 20:30 UTCJun 30, 05:30 UTC9h 1m
2026-06-29 AFR374F - Jun 29, 09:05 UTCJun 29, 17:59 UTC8h 55m
2026-06-28 AFR333F BOS → CDG Jun 28, 21:34 UTCJun 29, 03:34 UTC6h 0m
2026-06-28 AFR334M - Jun 28, 17:25 UTCJun 28, 18:49 UTC1h 25m
2026-06-28 AFR334M - Jun 28, 11:55 UTCJun 28, 13:34 UTC1h 40m
2026-06-28 AFR331E - Jun 28, 02:05 UTCJun 28, 08:05 UTC6h 0m
2026-06-27 AFR332 - Jun 27, 16:30 UTCJun 27, 23:29 UTC7h 0m
2026-06-21 AFR380V - Jun 21, 18:35 UTCJun 22, 04:44 UTC10h 10m
2026-06-18 AFR174 - Jun 18, 14:35 UTCJun 19, 01:59 UTC11h 24m
2026-06-17 AFR465 SSA → CDG Jun 17, 10:50 UTCJun 18, 06:20 UTC19h 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-HTYL page for operator, model, and routing details .

Mode-S 39CF0B frequently asked

What is Mode-S code 39CF0B?
39CF0B is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYL.
Where is Mode-S 39CF0B registered?
Mode-S code 39CF0B is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF0B broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 06:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF0B, octal 16347413, decimal 3,788,555.
What flights does 39CF0B operate?
Mode-S 39CF0B has broadcast 20 distinct callsigns, including AFR435, AFR436, AFR491, AFR57J, AFR332.