Apparatus

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sensors Mode-S transponder

39C423

ICAO 24-bit transponder address · allocated to France

Currently assigned to F-HRBD · BOEING 787-9 Dreamliner

Hex
39C423
Octal
16342043
Decimal
3,785,763
Country
FR
Tail
F-HRBD
Type
B789
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
185
Distinct callsigns
20
Country
FR
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S 39C423.

Country allocation

The ICAO 24-bit address 39C423 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
AFR75K Air France 13 2026-06-10
AFR202 Air France 12 2026-07-23
AFR074 Air France 12 2026-06-10
AFR343 Air France 11 2026-07-24
AFR342T - 11 2026-07-24
AFR201 Air France 9 2026-07-23
AFR468 - 8 2026-07-14
AFR926 - 7 2026-07-05
AFR902 Air France 7 2026-04-16
AFR570 Air France 7 2026-07-26
AFR754 Air France 6 2026-07-25
AFR551 - 6 2026-07-16
AFR415 Air France 6 2026-05-03
AFR988 Air France 5 2026-04-30
AFR923 - 5 2026-07-06
AFR471 - 5 2026-07-15
AFR416 Air France 5 2026-05-03
AFR292 - 5 2026-07-07
AFR194 - 5 2026-07-04
AFR989 - 4 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AFR570 CDG → CAI Jul 26, 18:40 UTCJul 26, 21:30 UTC2h 50m
2026-07-25 AFR754 CDG → BZV Jul 25, 10:50 UTCJul 26, 05:20 UTC18h 30m
2026-07-24 AFR343 YUL → CDG Jul 24, 21:30 UTCJul 25, 03:35 UTC6h 5m
2026-07-24 AFR342T - Jul 24, 09:05 UTCJul 24, 15:50 UTC6h 45m
2026-07-23 AFR201 PEK → CDG Jul 23, 16:00 UTCJul 24, 03:45 UTC11h 45m
2026-07-23 AFR202 CDG → BOM Jul 23, 06:40 UTCJul 23, 07:05 UTC25m
2026-07-22 AFR202 CDG → BOM Jul 22, 21:05 UTCJul 23, 00:55 UTC3h 50m
2026-07-21 AFR754 CDG → BZV Jul 21, 10:55 UTCJul 22, 05:25 UTC18h 30m
2026-07-20 AFR343 YUL → CDG Jul 20, 21:20 UTCJul 21, 03:30 UTC6h 9m
2026-07-20 AFR342T - Jul 20, 09:10 UTCJul 20, 15:45 UTC6h 35m
2026-07-19 AFR343 YUL → CDG Jul 19, 21:15 UTCJul 20, 03:30 UTC6h 15m
2026-07-19 AFR342T - Jul 19, 09:00 UTCJul 19, 16:00 UTC7h 0m
2026-07-18 AFR343 YUL → CDG Jul 18, 22:25 UTCJul 19, 04:30 UTC6h 5m
2026-07-18 AFR342T - Jul 18, 09:30 UTCJul 18, 16:05 UTC6h 35m
2026-07-16 AFR343 YUL → CDG Jul 16, 21:55 UTCJul 17, 03:59 UTC6h 5m
2026-07-16 AFR342T - Jul 16, 09:15 UTCJul 16, 16:00 UTC6h 45m
2026-07-16 AFR551 - Jul 16, 01:20 UTCJul 16, 05:30 UTC4h 10m
2026-07-15 AFR570 - Jul 15, 19:25 UTCJul 15, 23:00 UTC3h 35m
2026-07-15 AFR471 - Jul 15, 03:20 UTCJul 15, 15:40 UTC12h 20m
2026-07-14 AFR468 - Jul 14, 23:30 UTCJul 15, 01:15 UTC1h 45m
2026-07-14 AFR468 - Jul 14, 12:20 UTCJul 14, 23:25 UTC11h 4m
2026-07-13 AFR471A - Jul 13, 04:10 UTCJul 13, 16:10 UTC12h 0m
2026-07-12 AFR468 - Jul 12, 13:01 UTCJul 13, 02:10 UTC13h 10m
2026-07-09 AFR201 - Jul 9, 15:45 UTCJul 10, 03:40 UTC11h 55m
2026-07-09 AFR202 - Jul 9, 09:20 UTCJul 9, 09:40 UTC20m
2026-07-08 AFR202 - Jul 8, 23:55 UTCJul 9, 03:55 UTC4h 0m
2026-07-08 AFR291 KIX → CDG Jul 8, 06:15 UTCJul 8, 20:35 UTC14h 20m
2026-07-07 AFR292 - Jul 7, 17:15 UTCJul 8, 04:10 UTC10h 55m
2026-07-07 AFR292 - Jul 7, 16:05 UTCJul 7, 17:10 UTC1h 5m
2026-07-07 AFR4191 LHR → PEK Jul 7, 00:50 UTCJul 7, 13:10 UTC12h 20m
2026-07-06 AFR4190 - Jul 6, 09:50 UTCJul 6, 22:45 UTC12h 55m
2026-07-06 AFR923 - Jul 6, 01:05 UTCJul 6, 03:30 UTC2h 25m
2026-07-05 AFR926 - Jul 5, 09:25 UTCJul 5, 15:55 UTC6h 30m
2026-07-05 AFR191 - Jul 5, 03:00 UTCJul 5, 06:25 UTC3h 25m
2026-07-04 AFR191 - Jul 4, 20:40 UTCJul 5, 02:55 UTC6h 15m
2026-07-04 AFR194 - Jul 4, 18:20 UTCJul 4, 18:30 UTC10m
2026-07-04 AFR194 - Jul 4, 09:40 UTCJul 4, 16:40 UTC7h 0m
2026-07-04 AFR551 - Jul 4, 00:50 UTCJul 4, 04:45 UTC3h 55m
2026-07-03 AFR570 - Jul 3, 18:30 UTCJul 3, 22:10 UTC3h 40m
2026-07-03 AFR471 - Jul 3, 03:05 UTCJul 3, 15:30 UTC12h 25m
2026-07-02 AFR468 - Jul 2, 12:00 UTCJul 3, 00:50 UTC12h 50m
2026-07-01 AFR191 - Jul 1, 20:50 UTCJul 2, 06:20 UTC9h 30m
2026-07-01 AFR194 - Jul 1, 18:25 UTCJul 1, 18:45 UTC20m
2026-07-01 AFR194 - Jul 1, 09:35 UTCJul 1, 16:55 UTC7h 20m
2026-06-30 AFR926 - Jun 30, 09:35 UTCJul 1, 03:40 UTC18h 5m
2026-06-29 AFR736 - Jun 29, 10:50 UTCJun 30, 05:10 UTC18h 20m
2026-06-29 AFR736 - Jun 29, 09:34 UTCJun 30, 05:10 UTC19h 35m
2026-06-28 AFR722 - Jun 28, 10:55 UTCJun 29, 05:54 UTC19h 0m
2026-06-26 AFR191 - Jun 26, 20:50 UTCJun 27, 06:15 UTC9h 25m
2026-06-26 AFR194 - Jun 26, 09:35 UTCJun 26, 18:44 UTC9h 10m

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

Mode-S 39C423 frequently asked

What is Mode-S code 39C423?
39C423 is an ICAO 24-bit transponder address. Allocated to France. Assigned to F-HRBD.
Where is Mode-S 39C423 registered?
Mode-S code 39C423 is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 39C423 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 39C423, octal 16342043, decimal 3,785,763.
What flights does 39C423 operate?
Mode-S 39C423 has broadcast 20 distinct callsigns, including AFR75K, AFR202, AFR074, AFR343, AFR342T.