sensors Mode-S transponder

39CF0A

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF0A
Octal
16347412
Decimal
3,788,554
Country
FR
Tail
F-HTYK
Type
A359
No current signal · last broadcast 47m ago
Flights observed
97
Distinct callsigns
20
Country
FR
Last broadcast
47m ago

Last known position

Most recent position reported by Mode-S 39CF0A.

Country allocation

The ICAO 24-bit address 39CF0A 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
AFR174 Air France 11 2026-05-25
AFR173 Air France 10 2026-05-26
AFR722 Air France 6 2026-05-15
AFR407 Air France 6 2026-05-22
AFR995 Air France 5 2026-04-28
AFR375G Air France 5 2026-05-03
AFR374F Air France 5 2026-05-03
AFR990 Air France 4 2026-04-27
AFR491 Air France 3 2026-05-20
AFR436 Air France 3 2026-05-07
AFR406 Air France 3 2026-05-21
AFR871 Air France 2 2026-04-20
AFR754 Air France 2 2026-05-09
AFR579 Air France 2 2026-04-16
AFR52X Air France 2 2026-05-24
AFR435 Air France 2 2026-05-08
AFR431 Air France 2 2026-05-23
AFR199 Air France 2 2026-05-21
AFR198 Air France 2 2026-05-20
AFR191 Air France 2 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AFR258 CDG → SGN May 30, 12:40 UTCMay 30, 20:30 UTC7h 50m
2026-05-28 AFR029 LAX → CDG May 28, 04:20 UTCMay 28, 14:35 UTC10h 15m
2026-05-27 AFR029 LAX → CDG May 27, 18:00 UTCMay 28, 01:25 UTC7h 25m
2026-05-27 AFR028 LAX → PPT May 27, 07:45 UTCMay 27, 15:30 UTC7h 45m
2026-05-26 AFR028 LAX → PPT May 26, 17:50 UTCMay 27, 04:55 UTC11h 5m
2026-05-26 AFR173 MEX → CDG May 26, 04:35 UTCMay 26, 14:55 UTC10h 20m
2026-05-25 AFR174 CDG → MEX May 25, 14:30 UTCMay 26, 01:34 UTC11h 4m
2026-05-25 AFR53M IAD → CDG May 25, 02:00 UTCMay 25, 09:00 UTC7h 0m
2026-05-24 AFR52X CDG → IAD May 24, 23:00 UTCMay 24, 23:15 UTC15m
2026-05-24 AFR52X CDG → IAD May 24, 15:35 UTCMay 24, 21:45 UTC6h 10m
2026-05-23 AFR431 SJO → CDG May 23, 21:25 UTCMay 24, 11:15 UTC13h 50m
2026-05-23 AFR431 SJO → CDG May 23, 12:35 UTCMay 24, 11:15 UTC22h 40m
2026-05-23 AFR430 CDG → SJO May 23, 11:55 UTCMay 24, 10:30 UTC22h 35m
2026-05-22 AFR407 SCL → CDG May 22, 17:00 UTCMay 23, 04:00 UTC11h 0m
2026-05-22 AFR407 SCL → CDG May 22, 15:15 UTCMay 22, 15:25 UTC10m
2026-05-21 AFR406 CDG → SCL May 21, 22:15 UTCMay 22, 10:20 UTC12h 4m
2026-05-21 AFR199 BKK → CDG May 21, 06:00 UTCMay 21, 17:40 UTC11h 40m
2026-05-20 AFR198 CDG → BKK May 20, 16:15 UTCMay 21, 00:30 UTC8h 15m
2026-05-20 AFR491 CDG → PUJ May 20, 04:15 UTCMay 20, 12:40 UTC8h 26m
2026-05-19 AFR491 CDG → PUJ May 19, 14:35 UTCMay 20, 12:40 UTC22h 6m
2026-05-19 AFR491 CDG → PUJ May 19, 14:05 UTCMay 20, 12:30 UTC22h 26m
2026-05-17 AFR407 SCL → CDG May 17, 16:20 UTCMay 18, 03:25 UTC11h 5m
2026-05-17 AFR407 SCL → CDG May 17, 14:30 UTCMay 17, 14:40 UTC10m
2026-05-16 AFR406 CDG → SCL May 16, 21:35 UTCMay 16, 23:15 UTC1h 40m
2026-05-15 AFR722 CDG → FIH May 15, 10:35 UTCMay 16, 04:50 UTC18h 14m
2026-05-15 AFR722 CDG → FIH May 15, 09:00 UTCMay 16, 04:50 UTC19h 49m
2026-05-10 AFR722 CDG → FIH May 10, 10:35 UTCMay 11, 05:25 UTC18h 50m
2026-05-10 AFR722 CDG → FIH May 10, 09:55 UTCMay 11, 05:25 UTC19h 30m
2026-05-09 AFR754 CDG → BZV May 9, 10:35 UTCMay 10, 05:10 UTC18h 35m
2026-05-09 AFR754 CDG → BZV May 9, 09:15 UTCMay 10, 05:10 UTC19h 55m
2026-05-08 AFR594 CKY → CDG May 8, 16:35 UTCMay 9, 04:30 UTC11h 55m
2026-05-08 AFR435 MEX → CDG May 8, 11:55 UTCMay 8, 13:20 UTC1h 25m
2026-05-07 AFR436 CDG → BOG May 7, 14:45 UTCMay 7, 23:49 UTC9h 4m
2026-05-06 AFR185 HKG → CDG May 6, 22:50 UTCMay 7, 03:25 UTC4h 35m
2026-05-06 AFR185 HKG → CDG May 6, 14:40 UTCMay 6, 15:00 UTC20m
2026-05-05 AFR188 CDG → HKG May 5, 21:55 UTCMay 6, 09:25 UTC11h 30m
2026-05-05 AFR199 BKK → CDG May 5, 05:00 UTCMay 5, 06:05 UTC1h 5m
2026-05-04 AFR198 CDG → BKK May 4, 15:10 UTCMay 5, 01:45 UTC10h 36m
2026-05-03 AFR375G YVR → CDG May 3, 20:40 UTCMay 4, 05:45 UTC9h 5m
2026-05-03 AFR374F CDG → YVR May 3, 09:00 UTCMay 3, 18:14 UTC9h 15m
2026-05-02 AFR407 SCL → CDG May 2, 17:30 UTCMay 3, 03:35 UTC10h 4m
2026-05-02 AFR407 SCL → CDG May 2, 14:35 UTCMay 2, 14:45 UTC10m
2026-05-01 AFR406 CDG → SCL May 1, 21:40 UTCMay 1, 23:05 UTC1h 25m
2026-05-01 AFR435A MEX → CDG May 1, 02:20 UTCMay 1, 17:10 UTC14h 50m
2026-04-30 AFR436 CDG → BOG Apr 30, 18:35 UTCMay 1, 17:10 UTC22h 35m
2026-04-30 AFR435 MEX → CDG Apr 30, 11:15 UTCApr 30, 13:05 UTC1h 50m
2026-04-29 AFR436 CDG → BOG Apr 29, 14:10 UTCApr 29, 23:25 UTC9h 14m
2026-04-28 AFR995 JNB → CDG Apr 28, 16:15 UTCApr 29, 04:10 UTC11h 55m
2026-04-27 AFR990 CDG → JNB Apr 27, 21:40 UTCApr 28, 08:10 UTC10h 30m
2026-04-27 AFR477 CDG → PTY Apr 27, 03:45 UTCApr 27, 16:10 UTC12h 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-HTYK page for operator, model, and routing details .

Mode-S 39CF0A frequently asked

What is Mode-S code 39CF0A?
39CF0A is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYK.
Where is Mode-S 39CF0A registered?
Mode-S code 39CF0A is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF0A broadcasting right now?
No active broadcast right now. Last signal was 47m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF0A, octal 16347412, decimal 3,788,554.
What flights does 39CF0A operate?
Mode-S 39CF0A has broadcast 20 distinct callsigns, including AFR174, AFR173, AFR722, AFR407, AFR995.