Apparatus

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sensors Mode-S transponder

781BF6

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-324R · AIRBUS A-350-900

Hex
781BF6
Octal
36015766
Decimal
7,871,478
Country
CN
Tail
B-324R
Type
A359
No current signal · last broadcast 4h ago
Flights observed
161
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 781BF6.

Country allocation

The ICAO 24-bit address 781BF6 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
CSN322 - 31 2026-06-29
CSN302 China Southern Airlines 22 2026-07-05
CSN321 China Southern Airlines 17 2026-06-28
CSN301 - 12 2026-07-05
CSN655 - 10 2026-07-13
CSN656 - 8 2026-07-13
CSN306 China Southern Airlines 8 2026-06-01
CSN346 China Southern Airlines 7 2026-05-16
CSN674 China Southern Airlines 6 2026-05-29
CSN350 - 6 2026-06-25
CSN345 China Southern Airlines 6 2026-05-16
CSN673 China Southern Airlines 5 2026-05-28
CSN349 - 5 2026-06-25
CSN305 China Southern Airlines 5 2026-05-31
CSN338 - 3 2026-06-30
CSN6902 China Southern Airlines 2 2026-06-11
CSN6901 China Southern Airlines 2 2026-06-12
CSN348 China Southern Airlines 2 2026-06-27
CSN347 China Southern Airlines 2 2026-06-26
CSN337 - 1 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSN656 - Jul 13, 20:20 UTCJul 13, 22:20 UTC2h 0m
2026-07-13 CSN656 - Jul 13, 18:40 UTCJul 13, 18:55 UTC15m
2026-07-13 CSN655 - Jul 13, 15:10 UTCJul 13, 15:50 UTC40m
2026-07-13 CSN655 - Jul 13, 11:15 UTCJul 13, 13:35 UTC2h 20m
2026-07-11 CSN656 - Jul 11, 19:00 UTCJul 11, 22:50 UTC3h 50m
2026-07-11 CSN655 - Jul 11, 11:10 UTCJul 11, 15:10 UTC4h 0m
2026-07-10 CSN656 - Jul 10, 18:45 UTCJul 10, 22:35 UTC3h 50m
2026-07-10 CSN655 - Jul 10, 15:25 UTCJul 10, 15:35 UTC10m
2026-07-09 CSN656 - Jul 9, 19:25 UTCJul 10, 11:50 UTC16h 25m
2026-07-09 CSN655 - Jul 9, 16:40 UTCJul 9, 16:55 UTC15m
2026-07-09 CSN655 - Jul 9, 12:25 UTCJul 9, 14:40 UTC2h 15m
2026-07-08 CSN656 - Jul 8, 18:45 UTCJul 8, 22:40 UTC3h 55m
2026-07-08 CSN655 - Jul 8, 11:55 UTCJul 8, 16:20 UTC4h 25m
2026-07-06 CSN656 - Jul 6, 18:40 UTCJul 6, 22:40 UTC4h 0m
2026-07-06 CSN655 - Jul 6, 15:30 UTCJul 6, 15:40 UTC10m
2026-07-06 CSN655 - Jul 6, 11:10 UTCJul 6, 11:55 UTC45m
2026-07-05 CSN302 SYD → CAN Jul 5, 20:15 UTCJul 5, 20:35 UTC20m
2026-07-05 CSN302 SYD → CAN Jul 5, 12:00 UTCJul 5, 19:25 UTC7h 25m
2026-07-05 CSN301 - Jul 5, 00:45 UTCJul 5, 09:20 UTC8h 35m
2026-07-04 CSN302 SYD → CAN Jul 4, 20:35 UTCJul 4, 20:45 UTC10m
2026-07-04 CSN302 SYD → CAN Jul 4, 12:05 UTCJul 4, 19:40 UTC7h 35m
2026-07-04 CSN301 - Jul 4, 00:55 UTCJul 4, 09:05 UTC8h 10m
2026-07-03 CSN302 SYD → CAN Jul 3, 20:35 UTCJul 3, 20:50 UTC15m
2026-07-03 CSN302 SYD → CAN Jul 3, 12:00 UTCJul 3, 19:40 UTC7h 40m
2026-07-03 CSN301 - Jul 3, 00:35 UTCJul 3, 09:00 UTC8h 25m
2026-07-01 CSN656 - Jul 1, 18:30 UTCJul 1, 22:20 UTC3h 50m
2026-07-01 CSN655 - Jul 1, 11:10 UTCJul 1, 15:15 UTC4h 5m
2026-06-30 CSN338 - Jun 30, 06:35 UTCJun 30, 07:20 UTC45m
2026-06-30 CSN337 - Jun 30, 04:05 UTCJun 30, 04:55 UTC50m
2026-06-29 CSN322 - Jun 29, 09:20 UTCJun 29, 09:44 UTC25m
2026-06-29 CSN322 - Jun 29, 00:44 UTCJun 29, 08:29 UTC7h 45m
2026-06-28 CSN321 CAN → MEL Jun 28, 13:55 UTCJun 28, 22:10 UTC8h 15m
2026-06-28 CSN338 - Jun 28, 07:34 UTCJun 28, 08:19 UTC45m
2026-06-27 CSN348 CDG → CAN Jun 27, 11:44 UTCJun 28, 05:15 UTC17h 30m
2026-06-26 CSN347 CAN → CDG Jun 26, 22:14 UTCJun 27, 05:04 UTC6h 50m
2026-06-25 CSN350 - Jun 25, 08:24 UTCJun 25, 11:19 UTC2h 55m
2026-06-25 CSN349 - Jun 25, 03:04 UTCJun 25, 06:35 UTC3h 30m
2026-06-23 CSN322 - Jun 23, 09:24 UTCJun 23, 09:40 UTC15m
2026-06-23 CSN322 - Jun 23, 00:50 UTCJun 23, 08:35 UTC7h 45m
2026-06-22 CSN321 CAN → MEL Jun 22, 13:44 UTCJun 22, 22:10 UTC8h 25m
2026-06-22 CSN338 - Jun 22, 06:25 UTCJun 22, 07:10 UTC45m
2026-06-21 CSN348 CDG → CAN Jun 21, 10:25 UTCJun 22, 04:44 UTC18h 20m
2026-06-20 CSN347 CAN → CDG Jun 20, 22:00 UTCJun 21, 05:10 UTC7h 10m
2026-06-12 CSN6901 URC → PKX Jun 12, 05:05 UTCJun 12, 05:15 UTC10m
2026-06-11 CSN6902 PKX → URC Jun 11, 07:25 UTCJun 11, 07:40 UTC15m
2026-06-11 CSN6901 URC → PKX Jun 11, 04:50 UTCJun 11, 05:00 UTC10m
2026-06-10 CSN6902 PKX → URC Jun 10, 07:40 UTCJun 10, 07:55 UTC15m
2026-06-02 CSN350 KUL → CAN Jun 2, 06:10 UTCJun 2, 06:25 UTC15m
2026-06-02 CSN349 CAN → KUL Jun 2, 04:05 UTCJun 2, 04:20 UTC15m
2026-06-01 CSN306 AKL → CAN Jun 1, 13:00 UTCJun 1, 20:30 UTC7h 30m

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-324R page for operator, model, and routing details .

Mode-S 781BF6 frequently asked

What is Mode-S code 781BF6?
781BF6 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-324R.
Where is Mode-S 781BF6 registered?
Mode-S code 781BF6 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781BF6 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781BF6, octal 36015766, decimal 7,871,478.
What flights does 781BF6 operate?
Mode-S 781BF6 has broadcast 20 distinct callsigns, including CSN322, CSN302, CSN321, CSN301, CSN655.