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
Broadcasting now · callsign AFR595 · 40,375 ft
Flights observed
109
Distinct callsigns
20
Country
FR
Last broadcast
1h ago

Current position

39CF01 is currently broadcasting. Map zoomed to live position.

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
AFR435 Air France 9 2026-05-29
AFR194 Air France 8 2026-05-13
AFR191 Air France 8 2026-05-13
AFR436 Air France 7 2026-05-29
AFR468 Air France 6 2026-05-22
AFR430 Air France 6 2026-05-05
AFR173 Air France 6 2026-05-17
AFR174 Air France 5 2026-05-16
AFR477 Air France 4 2026-05-23
AFR249 Air France 4 2026-04-16
AFR248 Air France 4 2026-04-15
AFR871 - 3 2026-04-13
AFR431 Air France 3 2026-05-05
AFR097 Air France 3 2026-05-19
AFR096 Air France 3 2026-05-18
AFR092 Air France 3 2026-05-15
AFR598 Air France 2 2026-04-30
AFR578 Air France 2 2026-05-01
AFR407 Air France 2 2026-05-11
AFR332 Air France 2 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFR594 CKY → CDG May 29, 16:35 UTCMay 30, 02:15 UTC9h 40m
2026-05-29 AFR435 MEX → CDG May 29, 05:00 UTCMay 29, 13:30 UTC8h 30m
2026-05-29 AFR435 MEX → CDG May 29, 04:00 UTCMay 29, 04:15 UTC15m
2026-05-29 AFR436 CDG → BOG May 29, 01:15 UTCMay 29, 01:35 UTC20m
2026-05-28 AFR436 CDG → BOG May 28, 15:00 UTCMay 29, 00:25 UTC9h 25m
2026-05-28 AFR331E - May 28, 02:10 UTCMay 28, 08:25 UTC6h 15m
2026-05-27 AFR332 CDG → BOS May 27, 16:05 UTCMay 27, 22:40 UTC6h 35m
2026-05-27 AFR435 MEX → CDG May 27, 10:55 UTCMay 27, 12:45 UTC1h 50m
2026-05-27 AFR435 MEX → CDG May 27, 03:09 UTCMay 27, 03:24 UTC15m
2026-05-26 AFR436 CDG → BOG May 26, 14:50 UTCMay 26, 23:45 UTC8h 55m
2026-05-26 AFR57J LAS → CDG May 26, 01:34 UTCMay 26, 11:24 UTC9h 50m
2026-05-25 AFR56T CDG → LAS May 25, 12:50 UTCMay 25, 23:10 UTC10h 19m
2026-05-24 AFR375G YVR → CDG May 24, 23:00 UTCMay 25, 07:20 UTC8h 20m
2026-05-24 AFR374F CDG → YVR May 24, 08:45 UTCMay 24, 18:05 UTC9h 20m
2026-05-23 AFR477 CDG → PTY May 23, 04:25 UTCMay 23, 16:40 UTC12h 15m
2026-05-22 AFR468 CDG → CCS May 22, 12:45 UTCMay 23, 02:00 UTC13h 15m
2026-05-22 AFR331E BOS → CDG May 22, 01:55 UTCMay 22, 07:45 UTC5h 50m
2026-05-21 AFR332 CDG → BOS May 21, 16:15 UTCMay 21, 23:15 UTC7h 0m
2026-05-21 AFR435 MEX → CDG May 21, 04:00 UTCMay 21, 12:35 UTC8h 35m
2026-05-21 AFR435 MEX → CDG May 21, 03:00 UTCMay 21, 03:15 UTC15m
2026-05-20 AFR436 CDG → BOG May 20, 14:00 UTCMay 21, 00:25 UTC10h 25m
2026-05-20 AFR53M IAD → CDG May 20, 03:20 UTCMay 20, 10:20 UTC7h 1m
2026-05-20 AF052 - May 20, 00:55 UTCMay 20, 01:15 UTC20m
2026-05-19 AFR52X CDG → IAD May 19, 15:20 UTCMay 19, 23:10 UTC7h 50m
2026-05-19 AFR097 MCO → CDG May 19, 03:05 UTCMay 19, 11:20 UTC8h 15m
2026-05-18 AFR096 CDG → MCO May 18, 15:10 UTCMay 18, 23:40 UTC8h 29m
2026-05-18 AFR11E JFK → CDG May 18, 05:35 UTCMay 18, 12:10 UTC6h 35m
2026-05-17 AFR012 CDG → JFK May 17, 18:45 UTCMay 18, 02:15 UTC7h 30m
2026-05-17 AFR173 MEX → CDG May 17, 04:35 UTCMay 17, 14:25 UTC9h 50m
2026-05-16 AFR174 CDG → MEX May 16, 14:31 UTCMay 17, 02:10 UTC11h 40m
2026-05-16 AFR093 MIA → CDG May 16, 03:55 UTCMay 16, 11:35 UTC7h 41m
2026-05-15 AFR092 CDG → MIA May 15, 21:45 UTCMay 16, 01:25 UTC3h 40m
2026-05-15 AFR092 CDG → MIA May 15, 16:00 UTCMay 15, 17:45 UTC1h 45m
2026-05-15 AFR435 MEX → CDG May 15, 04:00 UTCMay 15, 12:55 UTC8h 55m
2026-05-15 AFR435 MEX → CDG May 15, 03:00 UTCMay 15, 03:15 UTC15m
2026-05-14 AFR436 CDG → BOG May 14, 14:20 UTCMay 15, 00:20 UTC10h 0m
2026-05-13 AFR191 BLR → CDG May 13, 22:05 UTCMay 14, 06:45 UTC8h 40m
2026-05-13 AFR191 BLR → CDG May 13, 20:50 UTCMay 13, 21:00 UTC10m
2026-05-13 AFR194 CDG → BLR May 13, 18:25 UTCMay 13, 18:40 UTC15m
2026-05-13 AFR194 CDG → BLR May 13, 09:35 UTCMay 13, 16:50 UTC7h 15m
2026-05-12 AFR579 CKY → CDG May 12, 16:45 UTCMay 13, 06:45 UTC14h 0m
2026-05-11 AFR407 SCL → CDG May 11, 16:45 UTCMay 12, 03:35 UTC10h 51m
2026-05-11 AFR407 SCL → CDG May 11, 14:55 UTCMay 11, 15:05 UTC10m
2026-05-10 AFR406 CDG → SCL May 10, 21:40 UTCMay 10, 22:35 UTC55m
2026-05-10 AFR477 CDG → PTY May 10, 03:50 UTCMay 10, 16:04 UTC12h 15m
2026-05-09 AFR468 CDG → CCS May 9, 12:00 UTCMay 10, 01:30 UTC13h 30m
2026-05-08 AFR199 BKK → CDG May 8, 04:39 UTCMay 8, 05:35 UTC55m
2026-05-07 AFR198 CDG → BKK May 7, 15:00 UTCMay 8, 01:19 UTC10h 19m
2026-05-07 AFR093 MIA → CDG May 7, 03:40 UTCMay 7, 11:55 UTC8h 15m
2026-05-06 AFR092 CDG → MIA May 6, 15:10 UTCMay 7, 00:10 UTC9h 0m

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?
Yes. Mode-S 39CF01 is currently airborne.
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 AFR435, AFR194, AFR191, AFR436, AFR468.