Apparatus

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sensors Mode-S transponder

781799

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30A9 · AIRBUS A-350-900

Hex
781799
Octal
36013631
Decimal
7,870,361
Country
CN
Tail
B-30A9
Type
A359
No current signal · last broadcast 56m ago
Flights observed
187
Distinct callsigns
20
Country
CN
Last broadcast
56m ago

Last known position

Most recent position reported by Mode-S 781799.

Country allocation

The ICAO 24-bit address 781799 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
CSN326 - 15 2026-07-05
CSN382 China Southern Airlines 14 2026-05-14
CSN308 - 14 2026-07-03
CSN655 - 13 2026-06-29
CSN307 - 13 2026-07-02
CSN8027 - 11 2026-06-27
CSN8003 China Southern Airlines 11 2026-06-16
CSN8032 China Southern Airlines 8 2026-07-17
CSN8028 - 8 2026-06-28
CSN8004 - 8 2026-06-23
CSN656 - 8 2026-06-29
CSN325 - 8 2026-07-04
CSN8031 - 7 2026-07-17
CSN8371 - 6 2026-07-11
CSN381 China Southern Airlines 6 2026-05-13
CSN354 - 4 2026-07-04
CSN348 China Southern Airlines 4 2026-05-29
CSN306 China Southern Airlines 4 2026-06-25
CSN8372 - 3 2026-07-11
CSN353 - 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CSN8032 TIJ → SZX Jul 17, 13:50 UTCJul 18, 01:50 UTC12h 0m
2026-07-17 CSN8032 TIJ → SZX Jul 17, 08:40 UTCJul 17, 11:30 UTC2h 50m
2026-07-17 CSN8031 - Jul 17, 06:25 UTCJul 17, 06:40 UTC15m
2026-07-16 CSN8031 - Jul 16, 16:49 UTCJul 17, 04:49 UTC12h 0m
2026-07-16 CSN8032 - Jul 16, 03:40 UTCJul 16, 03:50 UTC10m
2026-07-15 CSN8032 - Jul 15, 13:45 UTCJul 16, 01:30 UTC11h 45m
2026-07-15 CSN8032 - Jul 15, 08:05 UTCJul 15, 10:55 UTC2h 50m
2026-07-15 CSN8031 - Jul 15, 06:20 UTCJul 15, 06:25 UTC5m
2026-07-14 CSN8031 - Jul 14, 16:20 UTCJul 15, 04:35 UTC12h 14m
2026-07-14 CSN8031 - Jul 14, 14:15 UTCJul 14, 14:25 UTC10m
2026-07-13 CSN3564 - Jul 13, 09:25 UTCJul 13, 13:40 UTC4h 15m
2026-07-13 CSN3563 - Jul 13, 08:10 UTCJul 13, 08:20 UTC10m
2026-07-13 CSN3966 - Jul 13, 05:25 UTCJul 13, 06:10 UTC45m
2026-07-12 CSN3558 - Jul 12, 17:25 UTCJul 12, 17:45 UTC20m
2026-07-12 CSN3557 - Jul 12, 07:25 UTCJul 12, 07:35 UTC10m
2026-07-11 CSN8372 - Jul 11, 20:40 UTCJul 12, 03:05 UTC6h 25m
2026-07-11 CSN8371 - Jul 11, 16:25 UTCJul 11, 16:55 UTC30m
2026-07-11 CSN8371 - Jul 11, 12:50 UTCJul 11, 13:15 UTC25m
2026-07-11 CSN8371 - Jul 11, 08:01 UTCJul 11, 08:10 UTC10m
2026-07-11 CSN3576 - Jul 11, 04:05 UTCJul 11, 04:45 UTC40m
2026-07-10 CSN3568 - Jul 10, 23:15 UTCJul 10, 23:25 UTC10m
2026-07-10 CSN3558 SHA → SZX Jul 10, 13:00 UTCJul 10, 13:45 UTC45m
2026-07-10 CSN8372 - Jul 10, 05:00 UTCJul 10, 05:15 UTC15m
2026-07-09 CSN8372 - Jul 9, 20:30 UTCJul 10, 02:50 UTC6h 20m
2026-07-09 CSN8371 - Jul 9, 17:40 UTCJul 9, 17:50 UTC10m
2026-07-09 CSN8371 - Jul 9, 13:25 UTCJul 9, 15:40 UTC2h 15m
2026-07-09 CSN8371 - Jul 9, 08:10 UTCJul 9, 08:20 UTC10m
2026-07-09 CSN8032 - Jul 9, 04:55 UTCJul 9, 05:10 UTC15m
2026-07-08 CSN8032 - Jul 8, 14:45 UTCJul 9, 02:45 UTC12h 0m
2026-07-08 CSN8032 - Jul 8, 09:35 UTCJul 8, 12:30 UTC2h 55m
2026-07-08 CSN8031 - Jul 8, 07:40 UTCJul 8, 07:45 UTC5m
2026-07-07 CSN8031 - Jul 7, 18:25 UTCJul 8, 06:05 UTC11h 40m
2026-07-07 CSN3256 - Jul 7, 09:15 UTCJul 7, 12:50 UTC3h 35m
2026-07-07 CSN3255 - Jul 7, 08:05 UTCJul 7, 08:15 UTC10m
2026-07-06 CSN3564 - Jul 6, 18:00 UTCJul 6, 18:10 UTC10m
2026-07-06 CSN3563 - Jul 6, 09:45 UTCJul 6, 10:00 UTC15m
2026-07-06 CSN3966 - Jul 6, 01:15 UTCJul 6, 07:25 UTC6h 10m
2026-07-05 CSN326 - Jul 5, 09:40 UTCJul 5, 10:00 UTC20m
2026-07-05 CSN326 - Jul 5, 01:15 UTCJul 5, 08:55 UTC7h 40m
2026-07-04 CSN325 - Jul 4, 15:05 UTCJul 4, 23:20 UTC8h 15m
2026-07-04 CSN354 - Jul 4, 11:35 UTCJul 4, 11:50 UTC15m
2026-07-04 CSN354 - Jul 4, 08:30 UTCJul 4, 08:55 UTC25m
2026-07-04 CSN353 - Jul 4, 03:35 UTCJul 4, 06:45 UTC3h 10m
2026-07-03 CSN308 - Jul 3, 12:10 UTCJul 3, 17:45 UTC5h 35m
2026-07-02 CSN307 - Jul 2, 21:25 UTCJul 3, 04:10 UTC6h 45m
2026-07-02 CSN354 - Jul 2, 09:10 UTCJul 2, 09:30 UTC20m
2026-07-02 CSN354 - Jul 2, 06:15 UTCJul 2, 06:41 UTC26m
2026-07-02 CSN353 - Jul 2, 03:55 UTCJul 2, 04:25 UTC30m
2026-07-02 CSN353 - Jul 2, 01:20 UTCJul 2, 01:30 UTC10m
2026-07-01 CSN308 - Jul 1, 12:10 UTCJul 1, 18:00 UTC5h 50m

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-30A9 page for operator, model, and routing details .

Mode-S 781799 frequently asked

What is Mode-S code 781799?
781799 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30A9.
Where is Mode-S 781799 registered?
Mode-S code 781799 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781799 broadcasting right now?
No active broadcast right now. Last signal was 56m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781799, octal 36013631, decimal 7,870,361.
What flights does 781799 operate?
Mode-S 781799 has broadcast 20 distinct callsigns, including CSN326, CSN382, CSN308, CSN655, CSN307.