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sensors Mode-S transponder

781BF7

ICAO 24-bit transponder address · allocated to China

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

Hex
781BF7
Octal
36015767
Decimal
7,871,479
Country
CN
Tail
B-324S
Type
A359
Broadcasting now · callsign CSN673 · 36,000 ft
Flights observed
209
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 21:45 UTC

Current position

781BF7 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781BF7 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 China Southern Airlines 21 2026-07-23
CSN302 China Southern Airlines 20 2026-07-07
CSN674 China Southern Airlines 19 2026-06-26
CSN346 China Southern Airlines 16 2026-07-26
CSN321 China Southern Airlines 16 2026-07-22
CSN306 - 15 2026-07-16
CSN305 - 13 2026-07-16
CSN673 - 11 2026-06-25
CSN350 - 11 2026-06-17
CSN301 - 11 2026-07-07
CSN382 - 10 2026-07-13
CSN349 - 10 2026-06-17
CSN345 China Southern Airlines 10 2026-07-26
CSN347 China Southern Airlines 6 2026-06-15
CSN381 - 5 2026-07-12
CSN348 China Southern Airlines 4 2026-06-16
CSN6909 - 2 2026-07-09
CSN6902 - 2 2026-07-09
CSN6901 - 2 2026-06-28
CSN6916 China Southern Airlines 1 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN346 AMS → PKX Jul 26, 20:10 UTCJul 26, 21:45 UTC1h 35m
2026-07-26 CSN345 PEK → AMS Jul 26, 06:40 UTCJul 26, 16:05 UTC9h 25m
2026-07-25 CSN3903 PKX → CTU Jul 25, 08:10 UTCJul 25, 08:20 UTC10m
2026-07-25 CSN346 AMS → PKX Jul 25, 04:30 UTCJul 25, 04:50 UTC20m
2026-07-24 CSN346 AMS → PKX Jul 24, 20:05 UTCJul 25, 02:00 UTC5h 55m
2026-07-24 CSN345 PEK → AMS Jul 24, 09:45 UTCJul 24, 16:05 UTC6h 20m
2026-07-24 CSN345 PEK → AMS Jul 24, 06:40 UTCJul 24, 06:50 UTC10m
2026-07-23 CSN322 MEL → CAN Jul 23, 09:35 UTCJul 23, 09:55 UTC20m
2026-07-23 CSN322 MEL → CAN Jul 23, 00:40 UTCJul 23, 08:45 UTC8h 5m
2026-07-22 CSN321 CAN → MEL Jul 22, 13:45 UTCJul 22, 21:50 UTC8h 5m
2026-07-22 CSN322 MEL → CAN Jul 22, 00:30 UTCJul 22, 04:40 UTC4h 10m
2026-07-21 CSN321 CAN → MEL Jul 21, 14:20 UTCJul 21, 22:25 UTC8h 5m
2026-07-21 CSN322 MEL → CAN Jul 21, 09:10 UTCJul 21, 09:25 UTC15m
2026-07-21 CSN322 MEL → CAN Jul 21, 00:30 UTCJul 21, 08:20 UTC7h 50m
2026-07-20 CSN321 CAN → MEL Jul 20, 14:00 UTCJul 20, 22:15 UTC8h 15m
2026-07-20 CSN3106 PEK → CAN Jul 20, 07:40 UTCJul 20, 07:50 UTC10m
2026-07-16 CSN306 - Jul 16, 21:00 UTCJul 16, 21:19 UTC20m
2026-07-16 CSN306 - Jul 16, 13:10 UTCJul 16, 20:15 UTC7h 5m
2026-07-16 CSN306 - Jul 16, 10:20 UTCJul 16, 10:35 UTC15m
2026-07-16 CSN305 - Jul 16, 04:10 UTCJul 16, 04:25 UTC15m
2026-07-15 CSN305 - Jul 15, 18:15 UTCJul 16, 02:10 UTC7h 55m
2026-07-13 CSN382 - Jul 13, 08:50 UTCJul 13, 09:10 UTC20m
2026-07-13 CSN382 - Jul 13, 00:45 UTCJul 13, 07:55 UTC7h 10m
2026-07-12 CSN381 - Jul 12, 13:30 UTCJul 12, 21:20 UTC7h 50m
2026-07-12 CSN382 - Jul 12, 08:40 UTCJul 12, 09:00 UTC20m
2026-07-12 CSN382 - Jul 12, 00:40 UTCJul 12, 08:01 UTC7h 20m
2026-07-11 CSN381 - Jul 11, 13:40 UTCJul 11, 21:35 UTC7h 55m
2026-07-09 CSN6909 - Jul 9, 15:35 UTCJul 9, 15:45 UTC10m
2026-07-09 CSN6902 - Jul 9, 07:30 UTCJul 9, 07:45 UTC15m
2026-07-09 CSN346 - Jul 9, 04:30 UTCJul 9, 04:40 UTC10m
2026-07-08 CSN346 - Jul 8, 20:00 UTCJul 9, 02:10 UTC6h 10m
2026-07-08 CSN345 - Jul 8, 09:55 UTCJul 8, 16:10 UTC6h 15m
2026-07-07 CSN302 SYD → CAN Jul 7, 20:30 UTCJul 7, 20:55 UTC25m
2026-07-07 CSN302 SYD → CAN Jul 7, 11:55 UTCJul 7, 19:45 UTC7h 50m
2026-07-07 CSN301 - Jul 7, 01:55 UTCJul 7, 09:00 UTC7h 5m
2026-07-06 CSN382 - Jul 6, 08:25 UTCJul 6, 08:45 UTC20m
2026-07-06 CSN382 - Jul 6, 00:30 UTCJul 6, 07:40 UTC7h 10m
2026-07-05 CSN381 ZGN → BNE Jul 5, 13:35 UTCJul 5, 21:25 UTC7h 50m
2026-07-05 CSN322 - Jul 5, 08:35 UTCJul 5, 08:55 UTC20m
2026-07-05 CSN322 - Jul 5, 00:30 UTCJul 5, 07:45 UTC7h 15m
2026-07-04 CSN321 CAN → MEL Jul 4, 14:15 UTCJul 4, 22:35 UTC8h 20m
2026-07-04 CSN382 - Jul 4, 08:15 UTCJul 4, 08:35 UTC20m
2026-07-04 CSN382 - Jul 4, 00:20 UTCJul 4, 07:30 UTC7h 10m
2026-07-03 CSN381 - Jul 3, 14:25 UTCJul 3, 22:05 UTC7h 40m
2026-07-03 CSN322 - Jul 3, 00:35 UTCJul 3, 04:40 UTC4h 5m
2026-07-02 CSN321 CAN → MEL Jul 2, 14:00 UTCJul 2, 22:25 UTC8h 25m
2026-07-02 CSN382 - Jul 2, 08:25 UTCJul 2, 08:40 UTC15m
2026-07-02 CSN382 - Jul 2, 00:30 UTCJul 2, 07:40 UTC7h 10m
2026-07-01 CSN381 - Jul 1, 13:40 UTCJul 1, 21:30 UTC7h 50m
2026-06-30 CSN302 SYD → CAN Jun 30, 20:50 UTCJun 30, 21:10 UTC20m

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

Mode-S 781BF7 frequently asked

What is Mode-S code 781BF7?
781BF7 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-324S.
Where is Mode-S 781BF7 registered?
Mode-S code 781BF7 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781BF7 broadcasting right now?
Yes. Mode-S 781BF7 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781BF7, octal 36015767, decimal 7,871,479.
What flights does 781BF7 operate?
Mode-S 781BF7 has broadcast 20 distinct callsigns, including CSN322, CSN302, CSN674, CSN346, CSN321.