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 Jul 25, 06:50 UTC
Flights observed
396
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 06:50 UTC

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
CSN8158 - 21 2026-07-09
CSN5085 China Southern Airlines 18 2026-07-22
CSN8157 - 17 2026-07-09
CSN5086 China Southern Airlines 17 2026-07-22
CSN3089 - 16 2026-07-10
CSN8609 - 15 2026-07-01
CSN5079 China Southern Airlines 15 2026-07-24
CSN5080 China Southern Airlines 14 2026-07-24
CSN3090 - 13 2026-07-10
CSN6481 - 10 2026-07-16
CSN8469 - 9 2026-07-11
CSN8085 - 9 2026-07-08
CSN8086 - 8 2026-07-08
CSN8611 - 7 2026-07-23
CSN8610 - 7 2026-07-01
CSN5795 China Southern Airlines 7 2026-06-10
CSN8470 - 6 2026-07-11
CSN8056 - 6 2026-07-21
CSN8055 - 6 2026-07-20
CSN6386 - 6 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CSN5820 TSN → SZX Jul 25, 06:40 UTCJul 25, 06:50 UTC10m
2026-07-25 CSN5819 SZX → TSN Jul 25, 03:55 UTCJul 25, 04:20 UTC25m
2026-07-25 CSN5819 SZX → TSN Jul 25, 02:05 UTCJul 25, 02:15 UTC10m
2026-07-24 CSN5080 KUL → SZX Jul 24, 22:45 UTCJul 24, 23:10 UTC25m
2026-07-24 CSN5080 KUL → SZX Jul 24, 19:15 UTCJul 24, 19:25 UTC10m
2026-07-24 CSN5079 SZX → KUL Jul 24, 17:25 UTCJul 24, 17:55 UTC30m
2026-07-24 CSN5079 SZX → KUL Jul 24, 14:20 UTCJul 24, 14:30 UTC10m
2026-07-24 CSN8495 SZX → XIY Jul 24, 04:30 UTCJul 24, 04:45 UTC15m
2026-07-24 CSN6444 HAK → SZX Jul 24, 02:40 UTCJul 24, 02:50 UTC10m
2026-07-23 CSN6443 SZX → HAK Jul 23, 22:55 UTCJul 23, 23:10 UTC15m
2026-07-23 CSN8611 - Jul 23, 10:25 UTCJul 23, 10:40 UTC15m
2026-07-23 CSN8477 SZX → TFU Jul 23, 03:00 UTCJul 23, 03:15 UTC15m
2026-07-22 CSN5086 SIN → SZX Jul 22, 21:20 UTCJul 22, 21:50 UTC30m
2026-07-22 CSN5085 SZX → SIN Jul 22, 19:25 UTCJul 22, 19:50 UTC25m
2026-07-22 CSN5085 SZX → SIN Jul 22, 16:30 UTCJul 22, 16:40 UTC10m
2026-07-22 - - Jul 22, 13:25 UTCJul 22, 13:40 UTC15m
2026-07-21 CSN3634 HRB → SZX Jul 21, 14:30 UTCJul 21, 14:55 UTC25m
2026-07-21 CSN3634 HRB → SZX Jul 21, 11:55 UTCJul 21, 12:15 UTC20m
2026-07-21 CSN3633 SZX → HRB Jul 21, 04:25 UTCJul 21, 06:55 UTC2h 30m
2026-07-21 CSN8056 - Jul 21, 01:35 UTCJul 21, 01:50 UTC15m
2026-07-20 CSN8056 - Jul 20, 21:10 UTCJul 20, 22:35 UTC1h 25m
2026-07-20 CSN8055 - Jul 20, 19:35 UTCJul 20, 19:55 UTC20m
2026-07-20 CSN8055 - Jul 20, 15:35 UTCJul 20, 15:45 UTC10m
2026-07-20 CSN8717 - Jul 20, 01:35 UTCJul 20, 01:50 UTC15m
2026-07-19 CSN8612 JHG → SZX Jul 19, 15:55 UTCJul 19, 16:05 UTC10m
2026-07-19 CSN8612 JHG → SZX Jul 19, 14:00 UTCJul 19, 14:15 UTC15m
2026-07-19 CSN8611 - Jul 19, 10:35 UTCJul 19, 10:50 UTC15m
2026-07-19 CSN8712 - Jul 19, 07:35 UTCJul 19, 07:45 UTC10m
2026-07-19 CSN8712 - Jul 19, 06:50 UTCJul 19, 07:05 UTC15m
2026-07-19 CSN8711 - Jul 19, 02:15 UTCJul 19, 02:25 UTC10m
2026-07-19 CSN8056 - Jul 19, 00:35 UTCJul 19, 00:50 UTC15m
2026-07-18 CSN8056 - Jul 18, 19:55 UTCJul 18, 21:30 UTC1h 35m
2026-07-18 CSN8055 - Jul 18, 18:10 UTCJul 18, 18:30 UTC20m
2026-07-18 CSN8055 - Jul 18, 14:10 UTCJul 18, 14:20 UTC10m
2026-07-18 CSN8717 - Jul 18, 00:04 UTCJul 18, 00:15 UTC10m
2026-07-17 CSN8676 - Jul 17, 15:55 UTCJul 17, 16:15 UTC20m
2026-07-17 CSN8675 - Jul 17, 10:40 UTCJul 17, 10:50 UTC10m
2026-07-17 CSN3460 - Jul 17, 09:10 UTCJul 17, 09:20 UTC10m
2026-07-17 CSN3459 - Jul 17, 03:45 UTCJul 17, 03:59 UTC15m
2026-07-17 CSN8056 - Jul 17, 01:00 UTCJul 17, 01:15 UTC15m
2026-07-16 CSN8056 - Jul 16, 20:25 UTCJul 16, 21:55 UTC1h 30m
2026-07-16 CSN8055 - Jul 16, 18:55 UTCJul 16, 19:10 UTC15m
2026-07-16 CSN8055 - Jul 16, 14:50 UTCJul 16, 15:05 UTC15m
2026-07-16 CSN6481 - Jul 16, 04:40 UTCJul 16, 09:05 UTC4h 25m
2026-07-16 CSN6481 - Jul 16, 02:25 UTCJul 16, 02:40 UTC15m
2026-07-15 CSN8718 - Jul 15, 14:00 UTCJul 15, 14:25 UTC25m
2026-07-15 CSN8717 - Jul 15, 01:25 UTCJul 15, 01:40 UTC15m
2026-07-14 CSN6446 - Jul 14, 16:30 UTCJul 14, 16:55 UTC25m
2026-07-14 CSN6445 - Jul 14, 13:05 UTCJul 14, 13:20 UTC15m
2026-07-14 CSN3614 - Jul 14, 11:10 UTCJul 14, 11:25 UTC15m

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 Jul 25, 06:50 UTC.
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 CSN8158, CSN5085, CSN8157, CSN5086, CSN3089.