Apparatus

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sensors Mode-S transponder

39CF00

ICAO 24-bit transponder address · allocated to France

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

Hex
39CF00
Octal
16347400
Decimal
3,788,544
Country
FR
Tail
F-HTYA
Type
A359
No current signal · last broadcast 5h ago
Flights observed
160
Distinct callsigns
20
Country
FR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 39CF00.

Country allocation

The ICAO 24-bit address 39CF00 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
AFR407 - 11 2026-07-10
AFR253 Air France 8 2026-06-12
AFR477 Air France 7 2026-05-26
AFR406 - 7 2026-07-09
AFR258 - 7 2026-07-14
AFR465 - 6 2026-07-01
AFR375G - 6 2026-07-03
AFR374F - 6 2026-07-03
AFR685 - 3 2026-07-06
AFR468 Air France 3 2026-05-25
AFR430 Air France 3 2026-04-26
AFR338 - 3 2026-06-30
AFR337P - 3 2026-06-30
AFR332 Air France 3 2026-05-23
AFR331E - 3 2026-05-24
AFR267 - 3 2026-07-09
AFR264 - 3 2026-07-09
AFR174 Air France 3 2026-06-07
AFR173 Air France 3 2026-06-08
AFR11E Air France 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AFR258 - Jul 14, 12:50 UTCJul 14, 21:25 UTC8h 35m
2026-07-14 AFR33J - Jul 14, 01:15 UTCJul 14, 09:15 UTC8h 0m
2026-07-13 AFR32J - Jul 13, 12:30 UTCJul 13, 21:15 UTC8h 45m
2026-07-12 AFR415 - Jul 12, 23:10 UTCJul 13, 07:20 UTC8h 10m
2026-07-12 AFR416 - Jul 12, 12:15 UTCJul 12, 20:50 UTC8h 35m
2026-07-11 AFR511 - Jul 11, 22:35 UTCJul 12, 08:40 UTC10h 5m
2026-07-11 AFR512 - Jul 11, 19:20 UTCJul 11, 19:35 UTC15m
2026-07-11 AFR512 - Jul 11, 08:40 UTCJul 11, 18:30 UTC9h 50m
2026-07-10 AFR407 - Jul 10, 17:45 UTCJul 11, 04:01 UTC10h 16m
2026-07-10 AFR407 - Jul 10, 14:50 UTCJul 10, 15:05 UTC15m
2026-07-09 AFR406 - Jul 9, 21:45 UTCJul 9, 22:45 UTC1h 0m
2026-07-09 AFR267 - Jul 9, 04:35 UTCJul 9, 16:35 UTC12h 0m
2026-07-09 AFR267 - Jul 9, 03:10 UTCJul 9, 03:30 UTC20m
2026-07-09 AFR264 - Jul 9, 00:10 UTCJul 9, 00:30 UTC20m
2026-07-08 AFR264 - Jul 8, 13:35 UTCJul 8, 23:20 UTC9h 45m
2026-07-08 AFR53X IAD → CDG Jul 8, 02:05 UTCJul 8, 09:05 UTC7h 0m
2026-07-07 AFR52X - Jul 7, 16:20 UTCJul 7, 23:50 UTC7h 30m
2026-07-06 AFR685 - Jul 6, 21:35 UTCJul 7, 12:00 UTC14h 25m
2026-07-06 AFR199 - Jul 6, 05:45 UTCJul 6, 17:50 UTC12h 5m
2026-07-05 AFR198 CDG → BKK Jul 5, 15:35 UTCJul 6, 03:35 UTC12h 0m
2026-07-04 AFR685 CDG → ATL Jul 4, 22:00 UTCJul 5, 12:20 UTC14h 20m
2026-07-03 AFR375G YVR → CDG Jul 3, 22:20 UTCJul 4, 07:10 UTC8h 50m
2026-07-03 AFR374F - Jul 3, 10:40 UTCJul 3, 20:05 UTC9h 25m
2026-07-01 AFR465 - Jul 1, 12:05 UTCJul 2, 06:55 UTC18h 50m
2026-07-01 AFR465 - Jul 1, 10:05 UTCJul 2, 06:55 UTC20h 50m
2026-07-01 AFR465 CDG → CDG Jul 1, 09:50 UTCJul 2, 06:55 UTC21h 5m
2026-06-30 AFR337P SEA → CDG Jun 30, 21:35 UTCJul 1, 06:35 UTC9h 0m
2026-06-30 AFR338 - Jun 30, 09:50 UTCJun 30, 19:00 UTC9h 10m
2026-06-29 AFR333F BOS → CDG Jun 29, 22:05 UTCJun 30, 04:00 UTC5h 56m
2026-06-29 AFR334M - Jun 29, 12:14 UTCJun 29, 19:09 UTC6h 55m
2026-06-28 AFR75K - Jun 28, 22:29 UTCJun 29, 05:45 UTC7h 15m
2026-06-28 AFR074 - Jun 28, 11:35 UTCJun 28, 19:40 UTC8h 5m
2026-06-27 AFR333F - Jun 27, 21:29 UTCJun 28, 03:25 UTC5h 55m
2026-06-27 AFR334M - Jun 27, 12:09 UTCJun 27, 19:05 UTC6h 55m
2026-06-26 AFR099 - Jun 26, 22:19 UTCJun 27, 07:04 UTC8h 45m
2026-06-26 AFR98G - Jun 26, 10:15 UTCJun 26, 19:55 UTC9h 40m
2026-06-25 AFR337P - Jun 25, 21:35 UTCJun 26, 06:54 UTC9h 20m
2026-06-25 AFR338 - Jun 25, 09:34 UTCJun 25, 18:50 UTC9h 15m
2026-06-24 AFR337P SEA → CDG Jun 24, 20:49 UTCJun 25, 06:00 UTC9h 10m
2026-06-24 AFR338 - Jun 24, 08:45 UTCJun 24, 17:55 UTC9h 10m
2026-06-23 AFR407 - Jun 23, 17:25 UTCJun 24, 03:40 UTC10h 15m
2026-06-23 AFR407 - Jun 23, 14:44 UTCJun 23, 14:55 UTC10m
2026-06-22 AFR406 - Jun 22, 21:40 UTCJun 22, 23:05 UTC1h 25m
2026-06-22 AFR199 - Jun 22, 05:29 UTCJun 22, 06:25 UTC55m
2026-06-21 AFR198 - Jun 21, 16:14 UTCJun 22, 01:25 UTC9h 10m
2026-06-20 AFR407 - Jun 20, 17:10 UTCJun 21, 03:40 UTC10h 30m
2026-06-20 AFR407 - Jun 20, 14:24 UTCJun 20, 14:35 UTC10m
2026-06-19 AFR406 - Jun 19, 21:39 UTCJun 20, 08:34 UTC10h 55m
2026-06-18 AFR179 - Jun 18, 01:45 UTCJun 18, 11:30 UTC9h 45m
2026-06-17 AFR178 - Jun 17, 11:25 UTCJun 17, 22:30 UTC11h 5m

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

Mode-S 39CF00 frequently asked

What is Mode-S code 39CF00?
39CF00 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HTYA.
Where is Mode-S 39CF00 registered?
Mode-S code 39CF00 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39CF00 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39CF00, octal 16347400, decimal 3,788,544.
What flights does 39CF00 operate?
Mode-S 39CF00 has broadcast 20 distinct callsigns, including AFR407, AFR253, AFR477, AFR406, AFR258.