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 56m ago
Flights observed
89
Distinct callsigns
20
Country
FR
Last broadcast
56m ago

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 11 2026-05-10
AFR074 Air France 10 2026-05-10
AFR902 Air France 7 2026-04-16
AFR415 Air France 6 2026-05-03
AFR988 Air France 5 2026-04-30
AFR416 Air France 5 2026-05-03
AFR989 - 4 2026-05-01
AFR926 Air France 4 2026-04-25
AFR32J Air France 4 2026-05-24
AFR202 Air France 4 2026-05-02
AFR923 Air France 3 2026-04-25
AFR343 Air France 3 2026-05-21
AFR342T Air France 3 2026-05-21
AFR33J Air France 3 2026-05-25
AFR201 Air France 3 2026-05-02
AFR598 Air France 2 2026-05-28
AFR182 Air France 2 2026-05-04
AFR181 Air France 2 2026-05-05
AFR159X Air France 2 2026-05-26
AFR158M Air France 2 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AFR088 CDG → SFO May 29, 14:35 UTCMay 29, 22:40 UTC8h 5m
2026-05-28 AFR598 NKC → CDG May 28, 22:25 UTCMay 29, 06:45 UTC8h 20m
2026-05-28 AFR598 NKC → CDG May 28, 14:55 UTCMay 28, 20:00 UTC5h 5m
2026-05-26 AFR159X DFW → CDG May 26, 22:25 UTCMay 27, 07:10 UTC8h 45m
2026-05-26 AFR158M CDG → DFW May 26, 09:04 UTCMay 26, 18:50 UTC9h 45m
2026-05-25 AFR578 CDG → CKY May 25, 15:55 UTCMay 26, 05:59 UTC14h 4m
2026-05-25 AFR33J ATL → CDG May 25, 03:45 UTCMay 25, 11:30 UTC7h 45m
2026-05-24 AFR32J CDG → ATL May 24, 12:45 UTCMay 24, 21:45 UTC9h 0m
2026-05-24 AFR33J ATL → CDG May 24, 00:35 UTCMay 24, 08:30 UTC7h 55m
2026-05-23 AFR32J CDG → ATL May 23, 18:25 UTCMay 23, 21:40 UTC3h 15m
2026-05-23 AFR32J CDG → ATL May 23, 12:45 UTCMay 23, 18:20 UTC5h 36m
2026-05-23 AFR33J ATL → CDG May 23, 00:20 UTCMay 23, 07:50 UTC7h 30m
2026-05-22 AFR32J CDG → ATL May 22, 12:40 UTCMay 22, 21:30 UTC8h 50m
2026-05-21 AFR343 YUL → CDG May 21, 21:20 UTCMay 22, 03:15 UTC5h 55m
2026-05-21 AFR342T CDG → YUL May 21, 09:10 UTCMay 21, 16:05 UTC6h 55m
2026-05-10 AFR75K RDU → CDG May 10, 22:20 UTCMay 11, 05:35 UTC7h 15m
2026-05-10 AFR074 CDG → RDU May 10, 11:40 UTCMay 10, 19:35 UTC7h 55m
2026-05-09 AFR75K RDU → CDG May 9, 22:25 UTCMay 10, 05:50 UTC7h 25m
2026-05-09 AFR074 CDG → RDU May 9, 11:35 UTCMay 9, 19:35 UTC8h 0m
2026-05-08 AFR343 YUL → CDG May 8, 21:15 UTCMay 9, 03:30 UTC6h 15m
2026-05-08 AFR342T CDG → YUL May 8, 09:54 UTCMay 8, 16:50 UTC6h 55m
2026-05-07 AFR75K RDU → CDG May 7, 22:25 UTCMay 8, 05:20 UTC6h 54m
2026-05-07 AFR074 CDG → RDU May 7, 11:25 UTCMay 7, 19:55 UTC8h 30m
2026-05-06 AFR159X DFW → CDG May 6, 21:40 UTCMay 7, 06:05 UTC8h 25m
2026-05-06 AFR158M CDG → DFW May 6, 09:00 UTCMay 6, 19:05 UTC10h 4m
2026-05-05 AFR181 SIN → CDG May 5, 03:05 UTCMay 5, 16:00 UTC12h 55m
2026-05-04 AFR182 CDG → SIN May 4, 12:30 UTCMay 5, 00:15 UTC11h 46m
2026-05-03 AFR415 FOR → CDG May 3, 23:15 UTCMay 4, 07:00 UTC7h 45m
2026-05-03 AFR416 CDG → FOR May 3, 12:15 UTCMay 3, 21:05 UTC8h 50m
2026-05-02 AFR201 PEK → CDG May 2, 22:15 UTCMay 3, 03:10 UTC4h 55m
2026-05-02 AFR201 PEK → CDG May 2, 15:25 UTCMay 2, 15:35 UTC10m
2026-05-02 AFR202 CDG → BOM May 2, 07:30 UTCMay 2, 07:50 UTC20m
2026-05-01 AFR202 CDG → BOM May 1, 21:20 UTCMay 2, 01:35 UTC4h 15m
2026-05-01 AFR989 - May 1, 02:05 UTCMay 1, 03:55 UTC1h 50m
2026-04-30 AFR988 POB → POB Apr 30, 15:35 UTCApr 30, 15:45 UTC10m
2026-04-30 AFR988 POB → POB Apr 30, 09:20 UTCApr 30, 10:55 UTC1h 35m
2026-04-29 AFR201 PEK → CDG Apr 29, 15:25 UTCApr 30, 03:25 UTC11h 59m
2026-04-29 AFR202 CDG → BOM Apr 29, 07:05 UTCApr 29, 07:29 UTC25m
2026-04-28 AFR202 CDG → BOM Apr 28, 21:10 UTCApr 29, 01:10 UTC4h 0m
2026-04-28 AFR181 SIN → CDG Apr 28, 03:15 UTCApr 28, 16:30 UTC13h 15m
2026-04-27 AFR182 CDG → SIN Apr 27, 12:10 UTCApr 28, 00:15 UTC12h 5m
2026-04-26 AFR415 FOR → CDG Apr 26, 23:15 UTCApr 27, 07:20 UTC8h 5m
2026-04-26 AFR416 CDG → FOR Apr 26, 12:00 UTCApr 26, 20:30 UTC8h 30m
2026-04-25 AFR923 LBV → CDG Apr 25, 15:50 UTCApr 26, 05:15 UTC13h 25m
2026-04-25 AFR926 CDG → LBV Apr 25, 09:10 UTCApr 25, 14:25 UTC5h 15m
2026-04-24 AFR343 YUL → CDG Apr 24, 21:20 UTCApr 25, 03:55 UTC6h 35m
2026-04-24 AFR342T CDG → YUL Apr 24, 09:20 UTCApr 24, 15:30 UTC6h 10m
2026-04-22 AFR291 KIX → CDG Apr 22, 02:45 UTCApr 22, 17:15 UTC14h 30m
2026-04-21 AFR292 CDG → KIX Apr 21, 12:10 UTCApr 21, 23:45 UTC11h 35m
2026-04-20 AFR926 CDG → LBV Apr 20, 09:00 UTCApr 21, 04:00 UTC19h 1m

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 56m ago.
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, AFR074, AFR902, AFR415, AFR988.