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sensors Mode-S transponder

781FFD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32FV · AIRBUS A-320neo

Hex
781FFD
Octal
36017775
Decimal
7,872,509
Country
CN
Tail
B-32FV
Type
A20N
No current signal · last broadcast Jul 22, 16:30 UTC
Flights observed
261
Distinct callsigns
20
Country
CN
Last broadcast
Jul 22, 16:30 UTC

Last known position

Most recent position reported by Mode-S 781FFD.

Country allocation

The ICAO 24-bit address 781FFD falls within the block assigned to China (CN) by ICAO Annex 10, Volume III. Every aircraft registered in China 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
CSN8675 - 10 2026-07-18
CSN8736 - 8 2026-07-18
CSN8676 - 8 2026-07-18
CSN3613 - 8 2026-07-17
CSN8735 - 7 2026-07-18
CSN8611 - 7 2026-06-29
CSN8612 China Southern Airlines 6 2026-07-22
CSN6445 - 6 2026-07-09
CSN3090 China Southern Airlines 6 2026-06-03
CSN3089 China Southern Airlines 6 2026-06-03
CSN6621 - 5 2026-07-11
CSN6481 - 5 2026-06-26
CSN5387 China Southern Airlines 5 2026-05-14
CSN3912 - 5 2026-07-15
CSN3911 - 5 2026-07-15
CSN8158 - 4 2026-06-30
CSN6446 - 4 2026-07-09
CSN8797 - 3 2026-07-14
CSN8712 - 3 2026-07-16
CSN8157 - 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 CSN8612 JHG → SZX Jul 22, 16:20 UTCJul 22, 16:30 UTC10m
2026-07-22 CSN8612 JHG → SZX Jul 22, 14:30 UTCJul 22, 14:40 UTC10m
2026-07-21 CSN3171 - Jul 21, 23:50 UTCJul 22, 11:25 UTC11h 35m
2026-07-21 CSN6834 XNN → SZX Jul 21, 15:35 UTCJul 21, 15:45 UTC10m
2026-07-21 CSN6833 SZX → XNN Jul 21, 08:35 UTCJul 21, 08:50 UTC15m
2026-07-21 CSN8703 SZX → DLU Jul 21, 00:50 UTCJul 21, 01:10 UTC20m
2026-07-20 CSN3670 - Jul 20, 17:15 UTCJul 20, 17:30 UTC15m
2026-07-20 CSN5820 - Jul 20, 11:05 UTCJul 20, 11:15 UTC10m
2026-07-20 CSN5819 - Jul 20, 02:10 UTCJul 20, 02:20 UTC10m
2026-07-19 CSN6756 - Jul 19, 03:05 UTCJul 19, 18:15 UTC15h 10m
2026-07-19 CSN6755 SZX → PVG Jul 19, 02:00 UTCJul 19, 02:10 UTC10m
2026-07-18 CSN8676 - Jul 18, 15:50 UTCJul 18, 16:10 UTC20m
2026-07-18 CSN8675 - Jul 18, 10:10 UTCJul 18, 10:25 UTC15m
2026-07-18 CSN8736 - Jul 18, 07:35 UTCJul 18, 08:40 UTC1h 5m
2026-07-18 CSN8735 - Jul 18, 00:55 UTCJul 18, 01:05 UTC10m
2026-07-17 CSN6497 - Jul 17, 12:55 UTCJul 17, 13:15 UTC20m
2026-07-17 CSN3614 - Jul 17, 09:25 UTCJul 17, 09:35 UTC10m
2026-07-17 CSN3613 - Jul 17, 03:05 UTCJul 17, 07:00 UTC3h 55m
2026-07-17 CSN3613 - Jul 17, 00:40 UTCJul 17, 01:00 UTC20m
2026-07-16 CSN8820 - Jul 16, 15:40 UTCJul 16, 15:49 UTC10m
2026-07-16 CSN8819 - Jul 16, 10:35 UTCJul 16, 10:50 UTC15m
2026-07-16 CSN8712 - Jul 16, 07:55 UTCJul 16, 08:40 UTC45m
2026-07-16 CSN8711 - Jul 16, 03:30 UTCJul 16, 03:40 UTC10m
2026-07-15 CSN3912 - Jul 15, 18:20 UTCJul 15, 18:50 UTC30m
2026-07-15 CSN3911 - Jul 15, 00:30 UTCJul 15, 00:45 UTC15m
2026-07-14 CSN6833 - Jul 14, 09:55 UTCJul 14, 10:05 UTC10m
2026-07-14 CSN8797 - Jul 14, 00:25 UTCJul 14, 00:35 UTC10m
2026-07-13 CSN3912 - Jul 13, 15:30 UTCJul 13, 15:45 UTC15m
2026-07-13 CSN3911 - Jul 13, 00:20 UTCJul 13, 00:30 UTC10m
2026-07-12 CSN3272 - Jul 12, 13:10 UTCJul 12, 13:25 UTC15m
2026-07-12 CSN3271 - Jul 12, 08:01 UTCJul 12, 08:25 UTC25m
2026-07-11 CSN3351 - Jul 11, 23:20 UTCJul 11, 23:30 UTC10m
2026-07-11 CSN8676 - Jul 11, 15:55 UTCJul 11, 16:15 UTC20m
2026-07-11 CSN8675 - Jul 11, 10:20 UTCJul 11, 10:40 UTC20m
2026-07-11 CSN6622 - Jul 11, 08:25 UTCJul 11, 08:35 UTC10m
2026-07-11 CSN6621 - Jul 11, 02:10 UTCJul 11, 02:20 UTC10m
2026-07-10 CSN3912 - Jul 10, 16:05 UTCJul 10, 16:40 UTC35m
2026-07-10 CSN3911 - Jul 10, 01:05 UTCJul 10, 01:20 UTC15m
2026-07-09 CSN6446 - Jul 9, 17:25 UTCJul 9, 17:55 UTC30m
2026-07-09 CSN6445 - Jul 9, 12:10 UTCJul 9, 12:20 UTC10m
2026-07-09 CSN8736 - Jul 9, 09:50 UTCJul 9, 10:45 UTC55m
2026-07-09 CSN8735 - Jul 9, 01:05 UTCJul 9, 01:15 UTC10m
2026-07-08 CSN8498 - Jul 8, 16:20 UTCJul 8, 17:45 UTC1h 25m
2026-07-08 CSN8497 - Jul 8, 13:10 UTCJul 8, 13:20 UTC10m
2026-07-08 CSN8798 - Jul 8, 09:10 UTCJul 8, 09:35 UTC25m
2026-07-08 CSN8797 - Jul 8, 00:10 UTCJul 8, 00:20 UTC10m
2026-07-07 CSN3912 - Jul 7, 19:55 UTCJul 7, 20:05 UTC10m
2026-07-07 CSN3911 - Jul 7, 01:45 UTCJul 7, 02:00 UTC15m
2026-07-06 CSN3912 - Jul 6, 21:40 UTCJul 6, 22:00 UTC20m
2026-07-06 CSN3911 - Jul 6, 00:25 UTCJul 6, 00:35 UTC10m

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 B-32FV page for operator, model, and routing details .

Mode-S 781FFD frequently asked

What is Mode-S code 781FFD?
781FFD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32FV.
Where is Mode-S 781FFD registered?
Mode-S code 781FFD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FFD broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 16:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781FFD, octal 36017775, decimal 7,872,509.
What flights does 781FFD operate?
Mode-S 781FFD has broadcast 20 distinct callsigns, including CSN8675, CSN8736, CSN8676, CSN3613, CSN8735.