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 4h ago
Flights observed
349
Distinct callsigns
20
Country
CN
Last broadcast
4h 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
CSN8158 - 21 2026-07-09
CSN8157 - 17 2026-07-09
CSN5086 China Southern Airlines 16 2026-06-05
CSN5085 China Southern Airlines 16 2026-06-04
CSN3089 - 16 2026-07-10
CSN8609 - 15 2026-07-01
CSN5079 - 13 2026-07-11
CSN3090 - 13 2026-07-10
CSN5080 - 12 2026-07-11
CSN8469 - 9 2026-07-11
CSN8085 - 9 2026-07-08
CSN8086 - 8 2026-07-08
CSN6481 - 8 2026-07-04
CSN8610 - 7 2026-07-01
CSN5795 China Southern Airlines 7 2026-06-10
CSN8470 - 6 2026-07-11
CSN6386 - 6 2026-07-06
CSN8611 - 5 2026-07-13
CSN8474 - 5 2026-06-29
CSN8473 - 4 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-14 CSN3613 - Jul 14, 03:05 UTCJul 14, 08:50 UTC5h 45m
2026-07-14 CSN3613 - Jul 14, 00:45 UTCJul 14, 01:00 UTC15m
2026-07-13 CSN8612 - Jul 13, 15:50 UTCJul 13, 16:00 UTC10m
2026-07-13 CSN8611 - Jul 13, 10:30 UTCJul 13, 10:40 UTC10m
2026-07-13 CSN5820 - Jul 13, 08:55 UTCJul 13, 09:10 UTC15m
2026-07-13 CSN5819 - Jul 13, 02:01 UTCJul 13, 02:20 UTC20m
2026-07-12 CSN6756 - Jul 12, 09:25 UTCJul 12, 14:15 UTC4h 50m
2026-07-12 CSN6755 - Jul 12, 01:50 UTCJul 12, 02:01 UTC10m
2026-07-11 CSN5080 - Jul 11, 21:10 UTCJul 11, 21:35 UTC25m
2026-07-11 CSN5080 - Jul 11, 17:55 UTCJul 11, 18:15 UTC20m
2026-07-11 CSN5079 - Jul 11, 16:00 UTCJul 11, 16:30 UTC30m
2026-07-11 CSN5079 - Jul 11, 13:05 UTCJul 11, 13:15 UTC10m
2026-07-11 CSN8470 - Jul 11, 11:20 UTCJul 11, 11:30 UTC10m
2026-07-11 CSN8470 - Jul 11, 10:15 UTCJul 11, 10:25 UTC10m
2026-07-11 CSN8469 - Jul 11, 07:50 UTCJul 11, 08:25 UTC35m
2026-07-11 CSN8469 - Jul 11, 07:05 UTCJul 11, 07:15 UTC10m
2026-07-10 CSN3173 - Jul 10, 14:35 UTCJul 10, 14:55 UTC20m
2026-07-10 CSN3173 - Jul 10, 12:00 UTCJul 10, 12:15 UTC15m
2026-07-10 CSN3090 - Jul 10, 10:05 UTCJul 10, 10:20 UTC15m
2026-07-10 CSN3090 - Jul 10, 07:10 UTCJul 10, 07:50 UTC40m
2026-07-10 CSN3089 - Jul 10, 05:15 UTCJul 10, 06:00 UTC45m
2026-07-10 CSN3089 - Jul 10, 02:55 UTCJul 10, 03:05 UTC10m
2026-07-09 CSN8158 - Jul 9, 22:55 UTCJul 9, 23:10 UTC15m
2026-07-09 CSN8158 - Jul 9, 20:45 UTCJul 9, 21:20 UTC35m
2026-07-09 CSN8157 - Jul 9, 19:05 UTCJul 9, 19:40 UTC35m
2026-07-09 CSN8157 - Jul 9, 17:25 UTCJul 9, 17:40 UTC15m
2026-07-09 CSN8820 - Jul 9, 15:20 UTCJul 9, 15:30 UTC10m
2026-07-09 CSN8819 - Jul 9, 08:05 UTCJul 9, 08:20 UTC15m
2026-07-08 CSN8086 - Jul 8, 16:15 UTCJul 8, 16:25 UTC10m
2026-07-08 CSN8086 - Jul 8, 15:00 UTCJul 8, 15:10 UTC10m
2026-07-08 CSN8085 - Jul 8, 12:10 UTCJul 8, 13:35 UTC1h 25m
2026-07-08 CSN5369 - Jul 8, 00:25 UTCJul 8, 00:35 UTC10m
2026-07-07 CSN8086 - Jul 7, 18:35 UTCJul 7, 18:45 UTC10m
2026-07-07 CSN8086 - Jul 7, 17:20 UTCJul 7, 17:40 UTC20m
2026-07-07 CSN8085 - Jul 7, 15:30 UTCJul 7, 16:05 UTC35m
2026-07-07 CSN8085 - Jul 7, 14:45 UTCJul 7, 14:55 UTC10m
2026-07-07 CSN3090 - Jul 7, 11:35 UTCJul 7, 11:50 UTC15m
2026-07-07 CSN3090 - Jul 7, 07:45 UTCJul 7, 08:30 UTC45m
2026-07-07 CSN3089 - Jul 7, 05:25 UTCJul 7, 06:10 UTC45m
2026-07-07 CSN3089 - Jul 7, 03:10 UTCJul 7, 03:20 UTC10m
2026-07-06 CSN5080 - Jul 6, 22:50 UTCJul 6, 23:05 UTC15m
2026-07-06 CSN5080 - Jul 6, 19:15 UTCJul 6, 19:30 UTC15m
2026-07-06 CSN5079 - Jul 6, 17:30 UTCJul 6, 18:00 UTC30m
2026-07-06 CSN5079 - Jul 6, 14:35 UTCJul 6, 14:45 UTC10m
2026-07-06 CSN6386 - Jul 6, 10:10 UTCJul 6, 10:35 UTC25m
2026-07-06 CSN6386 - Jul 6, 03:25 UTCJul 6, 07:45 UTC4h 20m
2026-07-06 CSN6385 - Jul 6, 01:10 UTCJul 6, 01:30 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 4h 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 CSN8158, CSN8157, CSN5086, CSN5085, CSN3089.