Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 AFR338 · 38,000 ft
Flights observed
164
Distinct callsigns
20
Country
FR
Last broadcast
20h 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
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
AFR173 Air France 6 2026-05-17
AFR174 Air France 5 2026-05-16
AFR57J - 4 2026-07-12
AFR56T - 4 2026-07-11
AFR477 Air France 4 2026-05-23
AFR407 - 4 2026-06-19
AFR249 Air France 4 2026-04-16
AFR248 Air France 4 2026-04-15
AFR871 - 3 2026-04-13
AFR52X Air France 3 2026-06-09
AFR431 Air France 3 2026-05-05
AFR375G - 3 2026-06-21
AFR374F - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-16 AFR349 YUL → CDG Jun 16, 02:45 UTCJun 16, 08:55 UTC6h 10m
2026-06-15 AFR348F CDG → YUL Jun 15, 17:25 UTCJun 16, 00:20 UTC6h 55m
2026-06-15 AFR081 - Jun 15, 03:35 UTCJun 15, 13:34 UTC10h 0m
2026-06-14 AFR82M - Jun 14, 14:25 UTCJun 15, 00:49 UTC10h 24m
2026-06-13 AFR465 SSA → CDG Jun 13, 10:20 UTCJun 14, 06:15 UTC19h 56m
2026-06-13 AFR476 CDG → HAV Jun 13, 08:40 UTCJun 14, 06:15 UTC21h 35m
2026-06-12 AFR375G - Jun 12, 20:55 UTCJun 13, 05:55 UTC8h 59m
2026-06-12 AFR374F - Jun 12, 08:40 UTCJun 12, 17:50 UTC9h 10m
2026-06-11 AFR57J LAS → CDG Jun 11, 02:45 UTCJun 11, 12:15 UTC9h 30m
2026-06-10 AFR56T CDG → LAS Jun 10, 13:10 UTCJun 10, 23:45 UTC10h 35m
2026-06-10 AFR53X IAD → CDG Jun 10, 02:00 UTCJun 10, 09:00 UTC7h 0m
2026-06-09 AFR52X CDG → IAD Jun 9, 16:45 UTCJun 9, 23:15 UTC6h 30m
2026-06-08 AFR491 CDG → PUJ Jun 8, 23:05 UTCJun 9, 12:50 UTC13h 45m
2026-06-08 AFR491 CDG → PUJ Jun 8, 14:20 UTCJun 9, 12:50 UTC22h 30m
2026-06-08 AFR490 CDG → PTY Jun 8, 14:10 UTCJun 9, 12:15 UTC22h 5m
2026-06-08 AFR331E BOS → CDG Jun 8, 02:05 UTCJun 8, 08:05 UTC6h 0m
2026-06-07 AFR332 CDG → BOS Jun 7, 16:05 UTCJun 7, 23:00 UTC6h 55m
2026-06-07 AFR435 MEX → CDG Jun 7, 04:00 UTCJun 7, 12:10 UTC8h 10m
2026-06-07 AFR435 MEX → CDG Jun 7, 02:55 UTCJun 7, 03:10 UTC15m
2026-06-06 AFR436 CDG → BOG Jun 6, 14:09 UTCJun 7, 00:34 UTC10h 25m
2026-06-06 AFR53X IAD → CDG Jun 6, 02:00 UTCJun 6, 08:45 UTC6h 45m
2026-06-05 AFR52X CDG → IAD Jun 5, 16:15 UTCJun 5, 23:50 UTC7h 35m
2026-06-04 AFR191 BLR → CDG Jun 4, 21:25 UTCJun 5, 06:20 UTC8h 55m
2026-06-04 AFR191 BLR → CDG Jun 4, 20:15 UTCJun 4, 20:30 UTC15m
2026-06-04 AFR194 CDG → BLR Jun 4, 09:05 UTCJun 4, 18:10 UTC9h 5m
2026-06-03 AFR179 MEX → CDG Jun 3, 01:25 UTCJun 3, 11:05 UTC9h 40m

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 AFR191, AFR435, AFR194, AFR491, AFR436.