Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781B57

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-322V · AIRBUS A-320neo

Hex
781B57
Octal
36015527
Decimal
7,871,319
Country
CN
Tail
B-322V
Type
A20N
No current signal · last broadcast 4d ago
Flights observed
76
Distinct callsigns
15
Country
CN
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 781B57.

Country allocation

The ICAO 24-bit address 781B57 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 15 distinct

Callsign Airline Flights Last seen
CSN5049 - 23 2026-06-25
CSN5050 - 19 2026-06-26
CSN8360 - 7 2026-07-08
CSN8359 - 7 2026-07-08
CSN3066 - 3 2026-06-27
CSN3065 - 3 2026-06-20
CSN8088 - 2 2026-07-09
CSN8087 - 2 2026-07-09
CSN6929 - 2 2026-06-21
CSN3943 China Southern Airlines 2 2026-06-22
CSN6177 China Southern Airlines 1 2026-05-19
CSN6084 - 1 2026-06-24
CSN6083 - 1 2026-06-24
CSN5807 - 1 2026-07-08
CSN5113 China Southern Airlines 1 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 CSN8088 - Jul 9, 18:45 UTCJul 9, 22:20 UTC3h 35m
2026-07-09 CSN8087 - Jul 9, 14:00 UTCJul 9, 17:15 UTC3h 15m
2026-07-08 CSN8360 - Jul 8, 15:15 UTCJul 8, 15:30 UTC15m
2026-07-08 CSN8359 - Jul 8, 12:35 UTCJul 8, 13:10 UTC35m
2026-07-08 CSN5807 - Jul 8, 02:50 UTCJul 8, 03:10 UTC20m
2026-07-05 CSN8360 - Jul 5, 15:10 UTCJul 5, 15:25 UTC15m
2026-07-05 CSN8359 - Jul 5, 12:25 UTCJul 5, 12:50 UTC25m
2026-07-04 CSN8088 - Jul 4, 18:55 UTCJul 4, 22:25 UTC3h 30m
2026-07-04 CSN8087 - Jul 4, 14:05 UTCJul 4, 17:00 UTC2h 55m
2026-07-02 CSN8360 - Jul 2, 14:40 UTCJul 2, 15:05 UTC25m
2026-07-02 CSN8359 - Jul 2, 12:25 UTCJul 2, 13:00 UTC35m
2026-06-27 CSN3066 - Jun 27, 04:59 UTCJun 27, 05:49 UTC50m
2026-06-26 CSN5050 - Jun 26, 08:10 UTCJun 27, 02:59 UTC18h 50m
2026-06-25 CSN5049 - Jun 25, 14:55 UTCJun 26, 06:45 UTC15h 50m
2026-06-24 CSN6084 - Jun 24, 21:29 UTCJun 25, 12:35 UTC15h 5m
2026-06-24 CSN6083 - Jun 24, 16:50 UTCJun 24, 19:55 UTC3h 5m
2026-06-22 CSN3943 CSX → SYX Jun 22, 13:05 UTCJun 22, 13:14 UTC10m
2026-06-21 CSN6929 - Jun 21, 08:49 UTCJun 21, 13:34 UTC4h 45m
2026-06-20 CSN3066 - Jun 20, 05:24 UTCJun 20, 06:05 UTC40m
2026-06-20 CSN3065 - Jun 20, 02:14 UTCJun 20, 03:04 UTC50m
2026-06-18 CSN5113 CSX → SYX Jun 18, 15:45 UTCJun 19, 01:39 UTC9h 54m
2026-06-18 CSN3943 CSX → SYX Jun 18, 13:00 UTCJun 18, 13:15 UTC15m
2026-06-15 CSN5050 - Jun 15, 08:15 UTCJun 15, 11:15 UTC3h 0m
2026-06-15 CSN5049 - Jun 15, 03:05 UTCJun 15, 06:35 UTC3h 30m
2026-06-11 CSN5050 KUL → CSX Jun 11, 08:20 UTCJun 11, 11:15 UTC2h 55m
2026-06-11 CSN5049 CSX → KUL Jun 11, 03:15 UTCJun 11, 06:40 UTC3h 25m
2026-06-09 CSN8360 HAN → CSX Jun 9, 14:20 UTCJun 9, 14:35 UTC15m
2026-06-09 CSN8359 CSX → HAN Jun 9, 12:00 UTCJun 9, 12:30 UTC30m
2026-06-06 CSN8360 HAN → CSX Jun 6, 14:34 UTCJun 6, 14:54 UTC20m
2026-06-06 CSN8359 CSX → HAN Jun 6, 12:04 UTCJun 6, 12:35 UTC30m
2026-06-03 CSN5050 KUL → CSX Jun 3, 19:05 UTCJun 3, 22:05 UTC3h 0m
2026-06-03 CSN5049 CSX → KUL Jun 3, 14:25 UTCJun 3, 17:40 UTC3h 15m
2026-06-02 CSN8360 HAN → CSX Jun 2, 14:15 UTCJun 2, 14:40 UTC25m
2026-06-02 CSN8359 CSX → HAN Jun 2, 12:35 UTCJun 2, 12:50 UTC15m
2026-06-02 CSN3066 ICN → CSX Jun 2, 05:20 UTCJun 2, 05:45 UTC25m
2026-06-02 CSN3065 CSX → ICN Jun 2, 02:45 UTCJun 2, 03:15 UTC30m
2026-05-31 CSN5050 KUL → CSX May 31, 19:10 UTCMay 31, 22:00 UTC2h 50m
2026-05-31 CSN5049 CSX → KUL May 31, 17:20 UTCMay 31, 17:35 UTC15m
2026-05-31 CSN5049 CSX → KUL May 31, 14:15 UTCMay 31, 14:30 UTC15m
2026-05-29 CSN5050 KUL → CSX May 29, 21:30 UTCMay 29, 22:00 UTC30m
2026-05-29 CSN5050 KUL → CSX May 29, 19:05 UTCMay 29, 19:20 UTC15m
2026-05-29 CSN5049 CSX → KUL May 29, 17:20 UTCMay 29, 17:35 UTC15m
2026-05-29 CSN5049 CSX → KUL May 29, 14:35 UTCMay 29, 15:05 UTC30m
2026-05-28 CSN8360 HAN → CSX May 28, 14:25 UTCMay 28, 14:50 UTC25m
2026-05-28 CSN8359 CSX → HAN May 28, 12:05 UTCMay 28, 12:25 UTC20m
2026-05-25 CSN5050 KUL → CSX May 25, 20:50 UTCMay 25, 20:59 UTC10m
2026-05-25 CSN5050 KUL → CSX May 25, 19:10 UTCMay 25, 19:30 UTC20m
2026-05-25 CSN5049 CSX → KUL May 25, 14:00 UTCMay 25, 17:25 UTC3h 25m
2026-05-23 CSN5050 KUL → CSX May 23, 19:10 UTCMay 23, 19:25 UTC15m
2026-05-23 CSN5049 CSX → KUL May 23, 17:00 UTCMay 23, 17:25 UTC25m

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-322V page for operator, model, and routing details .

Mode-S 781B57 frequently asked

What is Mode-S code 781B57?
781B57 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-322V.
Where is Mode-S 781B57 registered?
Mode-S code 781B57 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B57 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B57, octal 36015527, decimal 7,871,319.
What flights does 781B57 operate?
Mode-S 781B57 has broadcast 15 distinct callsigns, including CSN5049, CSN5050, CSN8360, CSN8359, CSN3066.