Apparatus

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sensors Mode-S transponder

39CF01

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF01
Octal
16347401
Decimal
3,788,545
Country
FR
Tail
F-HTYB
Type
A359
No current signal · last broadcast Jul 26, 05:25 UTC
Flights observed
190
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 05:25 UTC

Last known position

Most recent position reported by Mode-S 39CF01.

Country allocation

The ICAO 24-bit address 39CF01 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
AFR191 Air France 12 2026-06-04
AFR435 Air France 11 2026-06-07
AFR194 Air France 10 2026-06-04
AFR491 - 8 2026-07-12
AFR436 Air France 8 2026-06-06
AFR468 Air France 6 2026-05-22
AFR430 Air France 6 2026-05-05
AFR407 Air France 6 2026-07-20
AFR173 Air France 6 2026-05-17
AFR174 Air France 5 2026-05-16
AFR57J - 4 2026-07-12
AFR56T - 4 2026-07-11
AFR52X Air France 4 2026-07-17
AFR477 Air France 4 2026-05-23
AFR465 Air France 4 2026-07-22
AFR249 Air France 4 2026-04-16
AFR248 Air France 4 2026-04-15
AFR871 - 3 2026-04-13
AFR53X - 3 2026-07-18
AFR431 Air France 3 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR199 BKK → CDG Jul 26, 04:50 UTCJul 26, 05:25 UTC35m
2026-07-25 AFR198 CDG → BKK Jul 25, 14:35 UTCJul 26, 01:00 UTC10h 25m
2026-07-25 AFR179 MEX → CDG Jul 25, 01:40 UTCJul 25, 11:50 UTC10h 10m
2026-07-24 AFR178 CDG → MEX Jul 24, 11:50 UTCJul 24, 22:10 UTC10h 20m
2026-07-23 AFR75K RDU → CDG Jul 23, 23:00 UTCJul 24, 06:00 UTC7h 0m
2026-07-23 AFR074 CDG → RDU Jul 23, 12:10 UTCJul 23, 20:10 UTC8h 0m
2026-07-22 AFR465 SSA → CDG Jul 22, 12:20 UTCJul 23, 06:25 UTC18h 5m
2026-07-22 AFR465 SSA → CDG Jul 22, 10:20 UTCJul 23, 06:25 UTC20h 5m
2026-07-22 AFR465 SSA → CDG Jul 22, 04:35 UTCJul 23, 04:15 UTC23h 40m
2026-07-21 AFR337P - Jul 21, 21:20 UTCJul 22, 12:40 UTC15h 20m
2026-07-21 AFR338 - Jul 21, 08:40 UTCJul 21, 18:25 UTC9h 45m
2026-07-20 AFR407 SCL → CDG Jul 20, 16:25 UTCJul 21, 03:25 UTC10h 59m
2026-07-20 AFR407 SCL → CDG Jul 20, 14:35 UTCJul 20, 14:45 UTC10m
2026-07-19 AFR406 CDG → SCL Jul 19, 21:35 UTCJul 19, 23:00 UTC1h 25m
2026-07-18 AFR253 SGN → CDG Jul 18, 16:20 UTCJul 19, 11:35 UTC19h 15m
2026-07-18 AFR258 - Jul 18, 14:20 UTCJul 19, 11:35 UTC21h 15m
2026-07-18 AFR258 - Jul 18, 12:30 UTCJul 19, 11:35 UTC23h 5m
2026-07-18 AFR53X - Jul 18, 01:54 UTCJul 18, 08:50 UTC6h 56m
2026-07-17 AFR52X CDG → IAD Jul 17, 15:29 UTCJul 17, 23:05 UTC7h 35m
2026-07-16 AFR935 - Jul 16, 12:25 UTCJul 17, 08:10 UTC19h 45m
2026-07-16 AFR934 - Jul 16, 10:20 UTCJul 17, 08:10 UTC21h 50m
2026-07-16 AFR934 - Jul 16, 09:15 UTCJul 17, 08:10 UTC22h 55m
2026-07-15 AFR337P SEA → CDG Jul 15, 21:05 UTCJul 16, 05:55 UTC8h 50m
2026-07-15 AFR338 CDG → SEA Jul 15, 09:10 UTCJul 15, 18:40 UTC9h 30m
2026-07-14 AFR337P SEA → CDG Jul 14, 21:05 UTCJul 15, 06:05 UTC8h 59m
2026-07-14 AFR338 CDG → SEA Jul 14, 08:55 UTCJul 14, 18:30 UTC9h 35m
2026-07-12 AFR491 - Jul 12, 22:45 UTCJul 13, 13:25 UTC14h 40m
2026-07-12 AFR491 - Jul 12, 16:20 UTCJul 13, 13:25 UTC21h 5m
2026-07-12 AFR491 - Jul 12, 15:15 UTCJul 13, 13:25 UTC22h 10m
2026-07-12 AFR57J LAS → CDG Jul 12, 02:01 UTCJul 12, 11:45 UTC9h 45m
2026-07-11 AFR56T - Jul 11, 13:00 UTCJul 11, 23:25 UTC10h 25m
2026-07-09 AFR491 - Jul 9, 23:15 UTCJul 10, 13:55 UTC14h 40m
2026-07-09 AFR491 - Jul 9, 15:20 UTCJul 10, 13:55 UTC22h 35m
2026-06-26 AFR75K - Jun 26, 22:25 UTCJun 27, 05:19 UTC6h 55m
2026-06-26 AFR074 - Jun 26, 11:49 UTCJun 26, 19:55 UTC8h 5m
2026-06-25 AFR415 FOR → CDG Jun 25, 23:19 UTCJun 26, 07:20 UTC8h 0m
2026-06-25 AFR416 - Jun 25, 12:25 UTCJun 25, 20:59 UTC8h 35m
2026-06-25 AFR349 YUL → CDG Jun 25, 02:54 UTCJun 25, 08:55 UTC6h 0m
2026-06-24 AFR348F CDG → YUL Jun 24, 16:54 UTCJun 24, 23:45 UTC6h 50m
2026-06-23 AFR491 - Jun 23, 22:29 UTCJun 24, 13:24 UTC14h 55m
2026-06-23 AFR490 CDG → CDG Jun 23, 14:55 UTCJun 24, 13:24 UTC22h 30m
2026-06-23 AFR57J LAS → CDG Jun 23, 02:20 UTCJun 23, 11:54 UTC9h 35m
2026-06-22 AFR56T - Jun 22, 12:05 UTCJun 22, 22:30 UTC10h 25m
2026-06-21 AFR375G - Jun 21, 20:40 UTCJun 22, 05:34 UTC8h 55m
2026-06-21 AFR374F - Jun 21, 08:49 UTCJun 21, 17:54 UTC9h 5m
2026-06-19 AFR407 - Jun 19, 00:29 UTCJun 19, 03:34 UTC3h 5m
2026-06-18 AFR407 - Jun 18, 14:20 UTCJun 18, 14:30 UTC10m
2026-06-17 AFR406 - Jun 17, 21:40 UTCJun 18, 08:30 UTC10h 50m
2026-06-17 AFR199 - Jun 17, 04:50 UTCJun 17, 17:05 UTC12h 15m
2026-06-16 AFR198 - Jun 16, 15:09 UTCJun 16, 23:50 UTC8h 41m

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

Mode-S 39CF01 frequently asked

What is Mode-S code 39CF01?
39CF01 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYB.
Where is Mode-S 39CF01 registered?
Mode-S code 39CF01 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF01 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF01, octal 16347401, decimal 3,788,545.
What flights does 39CF01 operate?
Mode-S 39CF01 has broadcast 20 distinct callsigns, including AFR191, AFR435, AFR194, AFR491, AFR436.