Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781571

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-303Y · AIRBUS A-321neo

Hex
781571
Octal
36012561
Decimal
7,869,809
Country
CN
Tail
B-303Y
Type
A21N
No current signal · last broadcast 21h ago
Flights observed
54
Distinct callsigns
19
Country
CN
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 781571.

Country allocation

The ICAO 24-bit address 781571 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 19 distinct

Callsign Airline Flights Last seen
CSN3062 China Southern Airlines 10 2026-05-29
CSN3061 China Southern Airlines 10 2026-05-29
CSN5016 China Southern Airlines 4 2026-05-21
CSN5015 China Southern Airlines 4 2026-05-21
CSN3040 China Southern Airlines 4 2026-05-28
CSN352 China Southern Airlines 3 2026-05-27
CSN8100 China Southern Airlines 2 2026-05-26
CSN8099 China Southern Airlines 2 2026-05-26
CSN357 China Southern Airlines 2 2026-05-25
CSN340 China Southern Airlines 2 2026-05-19
CSN339 China Southern Airlines 2 2026-05-18
CSN3039 China Southern Airlines 2 2026-05-28
CSN8459 China Southern Airlines 1 2026-05-01
CSN3715 - 1 2026-04-13
CSN3675 - 1 2026-04-19
CSN364 China Southern Airlines 1 2026-05-16
CSN363 China Southern Airlines 1 2026-05-16
CSN358 China Southern Airlines 1 2026-05-25
CSN351 China Southern Airlines 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSN3062 ICN → CAN May 29, 07:55 UTCMay 29, 08:20 UTC25m
2026-05-29 CSN3061 CAN → ICN May 29, 05:20 UTCMay 29, 06:05 UTC45m
2026-05-28 CSN3040 SIN → CAN May 28, 14:05 UTCMay 28, 14:25 UTC20m
2026-05-28 CSN3040 SIN → CAN May 28, 10:45 UTCMay 28, 11:15 UTC30m
2026-05-28 CSN3039 CAN → SIN May 28, 08:50 UTCMay 28, 09:05 UTC15m
2026-05-27 CSN352 SIN → CAN May 27, 00:34 UTCMay 27, 03:54 UTC3h 20m
2026-05-26 CSN8100 BKK → CAN May 26, 06:54 UTCMay 26, 07:40 UTC45m
2026-05-26 CSN8099 CAN → BKK May 26, 03:00 UTCMay 26, 05:15 UTC2h 15m
2026-05-25 CSN358 BKK → CAN May 25, 04:45 UTCMay 25, 05:30 UTC45m
2026-05-25 CSN357 CAN → BKK May 25, 02:35 UTCMay 25, 03:15 UTC40m
2026-05-24 CSN357 CAN → BKK May 24, 06:20 UTCMay 25, 03:15 UTC20h 55m
2026-05-24 CSN352 SIN → CAN May 24, 03:30 UTCMay 24, 03:50 UTC20m
2026-05-24 CSN352 SIN → CAN May 24, 00:35 UTCMay 24, 00:45 UTC10m
2026-05-23 CSN351 CAN → SIN May 23, 11:55 UTCMay 23, 15:10 UTC3h 15m
2026-05-23 CSN8100 BKK → CAN May 23, 07:10 UTCMay 23, 07:50 UTC40m
2026-05-23 CSN8099 CAN → BKK May 23, 03:50 UTCMay 23, 05:50 UTC2h 0m
2026-05-21 CSN5016 DAC → CAN May 21, 07:15 UTCMay 21, 07:40 UTC25m
2026-05-21 CSN5015 CAN → DAC May 21, 04:55 UTCMay 21, 05:35 UTC40m
2026-05-19 CSN340 ICN → CAN May 19, 00:50 UTCMay 19, 01:20 UTC30m
2026-05-18 CSN339 CAN → ICN May 18, 12:00 UTCMay 18, 12:25 UTC25m
2026-05-16 CSN364 BKK → CAN May 16, 12:05 UTCMay 16, 12:40 UTC35m
2026-05-16 CSN363 CAN → BKK May 16, 09:45 UTCMay 16, 10:31 UTC45m
2026-05-15 CSN3062 ICN → CAN May 15, 07:50 UTCMay 15, 08:15 UTC25m
2026-05-15 CSN3061 CAN → ICN May 15, 05:45 UTCMay 15, 06:15 UTC30m
2026-05-15 CSN3061 CAN → ICN May 15, 03:10 UTCMay 15, 03:20 UTC10m
2026-05-14 CSN3062 ICN → CAN May 14, 07:50 UTCMay 14, 08:35 UTC45m
2026-05-14 CSN3061 CAN → ICN May 14, 05:20 UTCMay 14, 06:05 UTC45m
2026-05-13 CSN3062 ICN → CAN May 13, 07:55 UTCMay 13, 08:40 UTC45m
2026-05-13 CSN3061 CAN → ICN May 13, 05:50 UTCMay 13, 06:35 UTC45m
2026-05-10 CSN5016 DAC → CAN May 10, 07:34 UTCMay 10, 08:25 UTC50m
2026-05-10 CSN5015 CAN → DAC May 10, 02:10 UTCMay 10, 05:50 UTC3h 40m
2026-05-03 CSN5016 DAC → CAN May 3, 07:30 UTCMay 3, 08:20 UTC50m
2026-05-03 CSN5015 CAN → DAC May 3, 02:05 UTCMay 3, 05:45 UTC3h 39m
2026-05-02 CSN3062 ICN → CAN May 2, 07:45 UTCMay 2, 08:30 UTC45m
2026-05-02 CSN3061 CAN → ICN May 2, 05:15 UTCMay 2, 05:45 UTC30m
2026-05-01 CSN8459 CGQ → CAN May 1, 05:00 UTCMay 1, 10:30 UTC5h 30m
2026-04-27 CSN5016 DAC → CAN Apr 27, 07:30 UTCApr 27, 08:00 UTC30m
2026-04-27 CSN5015 CAN → DAC Apr 27, 02:00 UTCApr 27, 05:55 UTC3h 55m
2026-04-23 CSN340 ICN → CAN Apr 23, 00:50 UTCApr 23, 01:35 UTC45m
2026-04-22 CSN339 CAN → ICN Apr 22, 11:50 UTCApr 22, 12:30 UTC40m
2026-04-20 CSN3062 ICN → CAN Apr 20, 08:10 UTCApr 20, 08:55 UTC45m
2026-04-20 CSN3061 CAN → ICN Apr 20, 06:15 UTCApr 20, 06:55 UTC40m
2026-04-19 CSN3675 - Apr 19, 12:45 UTCApr 19, 12:55 UTC10m
2026-04-18 CSN3062 ICN → CAN Apr 18, 07:50 UTCApr 18, 08:40 UTC50m
2026-04-18 CSN3061 CAN → ICN Apr 18, 05:25 UTCApr 18, 05:45 UTC20m
2026-04-16 CSN3062 ICN → CAN Apr 16, 07:49 UTCApr 16, 08:35 UTC45m
2026-04-16 CSN3061 CAN → ICN Apr 16, 05:24 UTCApr 16, 06:05 UTC40m
2026-04-14 CSN3040 SIN → CAN Apr 14, 13:20 UTCApr 14, 13:40 UTC20m
2026-04-14 CSN3040 - Apr 14, 10:30 UTCApr 14, 10:45 UTC15m
2026-04-14 CSN3039 CAN → SIN Apr 14, 08:25 UTCApr 14, 08:35 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-303Y page for operator, model, and routing details .

Mode-S 781571 frequently asked

What is Mode-S code 781571?
781571 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-303Y.
Where is Mode-S 781571 registered?
Mode-S code 781571 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781571 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781571, octal 36012561, decimal 7,869,809.
What flights does 781571 operate?
Mode-S 781571 has broadcast 19 distinct callsigns, including CSN3062, CSN3061, CSN5016, CSN5015, CSN3040.