Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781031

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8640 · AIRBUS A-321

Hex
781031
Octal
36010061
Decimal
7,868,465
Country
CN
Tail
B-8640
Type
A321
No current signal · last broadcast 11h ago
Flights observed
58
Distinct callsigns
10
Country
CN
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 781031.

Country allocation

The ICAO 24-bit address 781031 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 10 distinct

Callsign Airline Flights Last seen
CSN6077 China Southern Airlines 14 2026-05-29
CSN313 China Southern Airlines 13 2026-05-21
CSN6078 China Southern Airlines 10 2026-06-02
CSN314 China Southern Airlines 9 2026-05-22
CSN6437 China Southern Airlines 4 2026-05-28
CSN6209 China Southern Airlines 3 2026-05-29
CSN6515 China Southern Airlines 2 2026-05-08
CSN6753 China Southern Airlines 1 2026-04-29
CSN6509 China Southern Airlines 1 2026-05-24
CSN6096 China Southern Airlines 1 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CSN6078 SGN → PVG Jun 2, 02:50 UTCJun 2, 08:15 UTC5h 25m
2026-05-29 CSN6077 PVG → SGN May 29, 12:40 UTCMay 30, 08:15 UTC19h 35m
2026-05-29 CSN6077 PVG → SGN May 29, 04:20 UTCMay 30, 02:55 UTC22h 35m
2026-05-29 CSN6209 HRB → PVG May 29, 03:50 UTCMay 29, 12:40 UTC8h 50m
2026-05-28 CSN6437 SYX → HGH May 28, 12:45 UTCMay 29, 04:20 UTC15h 35m
2026-05-28 CSN6437 SYX → HGH May 28, 04:25 UTCMay 29, 03:55 UTC23h 30m
2026-05-28 CSN6437 SYX → HGH May 28, 03:55 UTCMay 28, 13:30 UTC9h 35m
2026-05-26 CSN6078 SGN → PVG May 26, 04:20 UTCMay 26, 09:49 UTC5h 30m
2026-05-24 CSN6509 SHE → PVG May 24, 15:10 UTCMay 24, 15:40 UTC30m
2026-05-23 CSN6078 SGN → PVG May 23, 02:45 UTCMay 23, 09:20 UTC6h 35m
2026-05-22 CSN6078 SGN → PVG May 22, 12:50 UTCMay 23, 09:20 UTC20h 29m
2026-05-22 CSN314 ICN → PVG May 22, 04:20 UTCMay 23, 02:55 UTC22h 34m
2026-05-22 CSN314 ICN → PVG May 22, 04:10 UTCMay 22, 13:25 UTC9h 14m
2026-05-21 CSN313 PVG → ICN May 21, 12:20 UTCMay 22, 02:15 UTC13h 55m
2026-05-19 CSN6077 PVG → SGN May 19, 02:40 UTCMay 19, 08:10 UTC5h 30m
2026-05-18 CSN6209 HRB → PVG May 18, 03:50 UTCMay 18, 04:00 UTC10m
2026-05-16 CSN6437 SYX → HGH May 16, 12:40 UTCMay 16, 13:11 UTC30m
2026-05-15 CSN6077 PVG → SGN May 15, 02:35 UTCMay 15, 03:00 UTC25m
2026-05-14 CSN314 ICN → PVG May 14, 03:50 UTCMay 14, 04:10 UTC20m
2026-05-14 CSN313 PVG → ICN May 14, 01:40 UTCMay 14, 02:15 UTC35m
2026-05-11 CSN314 ICN → PVG May 11, 03:55 UTCMay 11, 04:20 UTC25m
2026-05-10 CSN313 PVG → ICN May 10, 08:05 UTCMay 11, 02:15 UTC18h 10m
2026-05-10 CSN313 PVG → ICN May 10, 02:34 UTCMay 11, 02:15 UTC23h 40m
2026-05-09 CSN6077 PVG → SGN May 9, 04:55 UTCMay 10, 02:50 UTC21h 55m
2026-05-08 CSN6515 SHE → PVG May 8, 12:49 UTCMay 9, 05:00 UTC16h 10m
2026-05-08 CSN314 ICN → PVG May 8, 03:55 UTCMay 8, 04:04 UTC10m
2026-05-08 CSN313 PVG → ICN May 8, 01:29 UTCMay 8, 01:59 UTC30m
2026-05-07 CSN313 PVG → ICN May 7, 04:20 UTCMay 8, 01:59 UTC21h 40m
2026-05-07 CSN313 PVG → ICN May 7, 04:10 UTCMay 8, 01:59 UTC21h 50m
2026-05-06 CSN313 PVG → ICN May 6, 08:15 UTCMay 7, 02:10 UTC17h 54m
2026-05-06 CSN313 PVG → ICN May 6, 02:35 UTCMay 7, 02:10 UTC23h 34m
2026-05-05 CSN6077 PVG → SGN May 5, 04:30 UTCMay 6, 02:55 UTC22h 25m
2026-05-05 CSN314 ICN → PVG May 5, 04:05 UTCMay 5, 04:30 UTC25m
2026-05-05 CSN313 PVG → ICN May 5, 01:40 UTCMay 5, 02:10 UTC30m
2026-05-03 CSN6096 SGN → SZX May 3, 16:09 UTCMay 3, 22:05 UTC5h 55m
2026-05-01 CSN6078 SGN → PVG May 1, 08:20 UTCMay 2, 03:50 UTC19h 30m
2026-05-01 CSN6078 SGN → PVG May 1, 08:10 UTCMay 2, 03:50 UTC19h 40m
2026-05-01 CSN6077 PVG → SGN May 1, 02:45 UTCMay 1, 08:20 UTC5h 35m
2026-04-30 CSN6077 PVG → SGN Apr 30, 04:20 UTCMay 1, 03:05 UTC22h 45m
2026-04-30 CSN314 ICN → PVG Apr 30, 04:00 UTCApr 30, 04:25 UTC25m
2026-04-29 CSN313 PVG → ICN Apr 29, 12:50 UTCApr 30, 02:15 UTC13h 24m
2026-04-29 CSN6753 SYX → PVG Apr 29, 01:30 UTCApr 29, 12:50 UTC11h 21m
2026-04-28 CSN6078 SGN → PVG Apr 28, 07:50 UTCApr 29, 01:35 UTC17h 45m
2026-04-28 CSN6077 PVG → SGN Apr 28, 02:35 UTCApr 29, 01:35 UTC23h 0m
2026-04-27 CSN6077 PVG → SGN Apr 27, 12:20 UTCApr 28, 08:10 UTC19h 50m
2026-04-27 CSN6077 PVG → SGN Apr 27, 05:00 UTCApr 28, 02:55 UTC21h 55m
2026-04-24 CSN6209 HRB → PVG Apr 24, 12:55 UTCApr 25, 04:15 UTC15h 20m
2026-04-24 CSN6515 SHE → PVG Apr 24, 04:55 UTCApr 25, 04:15 UTC23h 20m
2026-04-21 CSN314 ICN → PVG Apr 21, 04:20 UTCApr 21, 04:50 UTC30m
2026-04-20 CSN313 PVG → ICN Apr 20, 07:55 UTCApr 21, 02:05 UTC18h 10m

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-8640 page for operator, model, and routing details .

Mode-S 781031 frequently asked

What is Mode-S code 781031?
781031 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8640.
Where is Mode-S 781031 registered?
Mode-S code 781031 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781031 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781031, octal 36010061, decimal 7,868,465.
What flights does 781031 operate?
Mode-S 781031 has broadcast 10 distinct callsigns, including CSN6077, CSN313, CSN6078, CSN314, CSN6437.