Apparatus

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sensors Mode-S transponder

781736

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-309X · AIRBUS A-320neo

Hex
781736
Octal
36013466
Decimal
7,870,262
Country
CN
Tail
B-309X
Type
A20N
No current signal · last broadcast 12h ago
Flights observed
160
Distinct callsigns
20
Country
CN
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 781736.

Country allocation

The ICAO 24-bit address 781736 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
CSN5086 China Southern Airlines 14 2026-05-30
CSN5085 China Southern Airlines 14 2026-05-29
CSN8158 China Southern Airlines 9 2026-05-23
CSN8157 China Southern Airlines 9 2026-05-23
CSN8609 China Southern Airlines 8 2026-05-30
CSN3089 China Southern Airlines 8 2026-05-29
CSN5795 China Southern Airlines 6 2026-05-15
CSN3090 China Southern Airlines 6 2026-05-29
CSN5080 China Southern Airlines 5 2026-05-06
CSN8469 China Southern Airlines 4 2026-05-23
CSN6592 China Southern Airlines 4 2026-05-27
CSN6481 China Southern Airlines 4 2026-05-19
CSN6386 China Southern Airlines 4 2026-05-25
CSN5079 China Southern Airlines 4 2026-05-06
CSN8610 China Southern Airlines 3 2026-05-22
CSN6591 China Southern Airlines 3 2026-05-27
CSN6482 China Southern Airlines 3 2026-05-19
CSN8966 - 2 2026-04-22
CSN8598 China Southern Airlines 2 2026-05-21
CSN8597 China Southern Airlines 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN8609 SZX → URC May 30, 04:00 UTCMay 30, 04:10 UTC10m
2026-05-30 CSN5086 SIN → SZX May 30, 01:05 UTCMay 30, 01:25 UTC20m
2026-05-29 CSN5086 SIN → SZX May 29, 21:30 UTCMay 29, 22:10 UTC40m
2026-05-29 CSN5085 SZX → SIN May 29, 19:30 UTCMay 29, 19:40 UTC10m
2026-05-29 CSN5085 SZX → SIN May 29, 16:35 UTCMay 29, 16:45 UTC10m
2026-05-29 CSN3090 ICN → SZX May 29, 08:50 UTCMay 29, 09:10 UTC20m
2026-05-29 CSN3090 ICN → SZX May 29, 06:00 UTCMay 29, 06:25 UTC25m
2026-05-29 CSN3089 SZX → ICN May 29, 03:20 UTCMay 29, 03:55 UTC35m
2026-05-29 CSN3089 SZX → ICN May 29, 00:55 UTCMay 29, 01:10 UTC15m
2026-05-28 CSN6446 CGD → SZX May 28, 15:10 UTCMay 28, 15:25 UTC15m
2026-05-28 CSN6445 SZX → CGD May 28, 11:30 UTCMay 28, 11:45 UTC15m
2026-05-28 CSN6327 DLC → SZX May 28, 09:50 UTCMay 28, 10:10 UTC20m
2026-05-28 CSN6327 DLC → SZX May 28, 08:50 UTCMay 28, 09:15 UTC25m
2026-05-27 CSN6326 - May 27, 08:20 UTCMay 27, 08:35 UTC15m
2026-05-27 CSN6326 - May 27, 07:20 UTCMay 27, 07:30 UTC10m
2026-05-27 CSN6592 NGB → SZX May 27, 05:40 UTCMay 27, 06:04 UTC25m
2026-05-27 CSN6591 SZX → NGB May 27, 01:05 UTCMay 27, 01:14 UTC10m
2026-05-26 CSN8609 SZX → URC May 26, 04:00 UTCMay 26, 04:15 UTC15m
2026-05-26 CSN8578 WUH → SZX May 26, 01:14 UTCMay 26, 01:40 UTC25m
2026-05-25 CSN8577 SZX → WUH May 25, 13:40 UTCMay 25, 13:50 UTC10m
2026-05-25 CSN6386 SHE → SZX May 25, 11:35 UTCMay 25, 11:45 UTC10m
2026-05-24 CSN3090 ICN → SZX May 24, 05:50 UTCMay 24, 06:20 UTC30m
2026-05-24 CSN3089 SZX → ICN May 24, 03:55 UTCMay 24, 04:30 UTC35m
2026-05-24 CSN3089 SZX → ICN May 24, 01:30 UTCMay 24, 01:40 UTC10m
2026-05-23 CSN8158 BKK → SZX May 23, 22:05 UTCMay 23, 22:20 UTC15m
2026-05-23 CSN8158 BKK → SZX May 23, 20:05 UTCMay 23, 20:40 UTC35m
2026-05-23 CSN8157 SZX → BKK May 23, 16:55 UTCMay 23, 17:35 UTC40m
2026-05-23 CSN8157 SZX → BKK May 23, 15:20 UTCMay 23, 15:35 UTC15m
2026-05-23 CSN8469 SZX → HAN May 23, 07:05 UTCMay 23, 07:20 UTC15m
2026-05-22 CSN5861 SZX → CTU May 22, 23:20 UTCMay 22, 23:30 UTC10m
2026-05-22 CSN8610 URC → SZX May 22, 15:15 UTCMay 22, 15:25 UTC10m
2026-05-22 CSN8609 SZX → URC May 22, 04:00 UTCMay 22, 04:10 UTC10m
2026-05-22 CSN5086 SIN → SZX May 22, 00:50 UTCMay 22, 01:00 UTC10m
2026-05-21 CSN5086 SIN → SZX May 21, 21:30 UTCMay 21, 22:05 UTC35m
2026-05-21 CSN5085 SZX → SIN May 21, 19:50 UTCMay 21, 20:05 UTC15m
2026-05-21 CSN5085 SZX → SIN May 21, 16:50 UTCMay 21, 17:00 UTC10m
2026-05-21 CSN8598 HGH → SZX May 21, 13:20 UTCMay 21, 14:05 UTC45m
2026-05-21 CSN8597 SZX → HGH May 21, 05:20 UTCMay 21, 05:35 UTC15m
2026-05-20 CSN8587 - May 20, 20:00 UTCMay 20, 20:15 UTC15m
2026-05-20 CSN8610 URC → SZX May 20, 18:20 UTCMay 20, 18:35 UTC15m
2026-05-20 CSN8609 SZX → URC May 20, 04:00 UTCMay 20, 04:10 UTC10m
2026-05-20 CSN5086 SIN → SZX May 20, 00:50 UTCMay 20, 01:05 UTC15m
2026-05-19 CSN5086 SIN → SZX May 19, 21:40 UTCMay 19, 21:55 UTC15m
2026-05-19 CSN5085 SZX → SIN May 19, 19:00 UTCMay 19, 19:15 UTC15m
2026-05-19 CSN5085 SZX → SIN May 19, 16:05 UTCMay 19, 16:15 UTC10m
2026-05-19 CSN6482 HRB → SZX May 19, 11:50 UTCMay 19, 12:10 UTC20m
2026-05-19 CSN6481 SZX → HRB May 19, 04:35 UTCMay 19, 09:25 UTC4h 50m
2026-05-19 CSN6481 SZX → HRB May 19, 02:20 UTCMay 19, 02:30 UTC10m
2026-05-18 CSN6755 SZX → PVG May 18, 02:10 UTCMay 18, 02:25 UTC15m
2026-05-17 CSN8158 BKK → SZX May 17, 22:15 UTCMay 17, 22:35 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-309X page for operator, model, and routing details .

Mode-S 781736 frequently asked

What is Mode-S code 781736?
781736 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-309X.
Where is Mode-S 781736 registered?
Mode-S code 781736 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781736 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781736, octal 36013466, decimal 7,870,262.
What flights does 781736 operate?
Mode-S 781736 has broadcast 20 distinct callsigns, including CSN5086, CSN5085, CSN8158, CSN8157, CSN8609.