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 10h ago
Flights observed
85
Distinct callsigns
14
Country
CN
Last broadcast
10h 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 14 distinct

Callsign Airline Flights Last seen
CSN382 China Southern Airlines 14 2026-05-14
CSN326 China Southern Airlines 11 2026-06-02
CSN8003 China Southern Airlines 9 2026-05-31
CSN308 China Southern Airlines 8 2026-05-24
CSN307 China Southern Airlines 7 2026-05-23
CSN8004 China Southern Airlines 6 2026-05-31
CSN381 China Southern Airlines 6 2026-05-13
CSN325 China Southern Airlines 6 2026-06-01
CSN655 China Southern Airlines 5 2026-05-27
CSN348 China Southern Airlines 4 2026-05-29
CSN656 China Southern Airlines 3 2026-05-27
CSN8028 China Southern Airlines 2 2026-05-30
CSN8027 China Southern Airlines 2 2026-05-29
CSN347 China Southern Airlines 2 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CSN326 SYD → CAN Jun 2, 08:45 UTCJun 2, 09:00 UTC15m
2026-06-02 CSN326 SYD → CAN Jun 2, 00:10 UTCJun 2, 07:55 UTC7h 45m
2026-06-01 CSN325 CAN → SYD Jun 1, 13:15 UTCJun 1, 21:40 UTC8h 25m
2026-05-31 CSN8004 SVO → WUH May 31, 18:35 UTCMay 31, 22:20 UTC3h 45m
2026-05-31 CSN8003 WUH → SVO May 31, 11:45 UTCMay 31, 16:00 UTC4h 15m
2026-05-30 CSN8003 WUH → SVO May 30, 16:35 UTCMay 31, 16:00 UTC23h 25m
2026-05-30 CSN8028 SVO → CAN May 30, 14:20 UTCMay 31, 14:05 UTC23h 45m
2026-05-30 CSN8028 SVO → CAN May 30, 13:30 UTCMay 31, 12:15 UTC22h 45m
2026-05-29 CSN8027 CAN → SVO May 29, 16:25 UTCMay 30, 10:50 UTC18h 25m
2026-05-29 CSN8027 CAN → SVO May 29, 14:20 UTCMay 30, 10:50 UTC20h 30m
2026-05-29 CSN348 CDG → CAN May 29, 12:20 UTCMay 30, 10:50 UTC22h 30m
2026-05-29 CSN348 CDG → CAN May 29, 10:30 UTCMay 30, 10:15 UTC23h 45m
2026-05-28 CSN347 CAN → CDG May 28, 22:05 UTCMay 29, 04:40 UTC6h 35m
2026-05-27 CSN656 SVO → CAN May 27, 18:30 UTCMay 27, 20:20 UTC1h 50m
2026-05-27 CSN655 CAN → SVO May 27, 11:15 UTCMay 27, 12:00 UTC45m
2026-05-25 CSN656 SVO → CAN May 25, 18:35 UTCMay 25, 22:15 UTC3h 39m
2026-05-25 CSN655 CAN → SVO May 25, 11:00 UTCMay 25, 15:10 UTC4h 10m
2026-05-24 CSN655 CAN → SVO May 24, 16:50 UTCMay 25, 15:10 UTC22h 20m
2026-05-24 CSN655 CAN → SVO May 24, 15:05 UTCMay 25, 14:15 UTC23h 10m
2026-05-24 CSN308 AMS → CAN May 24, 12:20 UTCMay 25, 11:25 UTC23h 5m
2026-05-24 CSN308 AMS → CAN May 24, 11:50 UTCMay 24, 17:35 UTC5h 45m
2026-05-23 CSN307 CAN → AMS May 23, 21:30 UTCMay 24, 04:05 UTC6h 35m
2026-05-22 CSN308 AMS → CAN May 22, 11:40 UTCMay 22, 17:35 UTC5h 55m
2026-05-21 CSN307 CAN → AMS May 21, 21:30 UTCMay 22, 04:10 UTC6h 40m
2026-05-21 CSN326 SYD → CAN May 21, 08:45 UTCMay 21, 09:05 UTC20m
2026-05-21 CSN326 SYD → CAN May 21, 00:25 UTCMay 21, 07:55 UTC7h 30m
2026-05-20 CSN325 CAN → SYD May 20, 13:40 UTCMay 20, 22:20 UTC8h 40m
2026-05-19 CSN308 AMS → CAN May 19, 11:40 UTCMay 19, 17:40 UTC6h 0m
2026-05-18 CSN307 CAN → AMS May 18, 22:45 UTCMay 19, 05:15 UTC6h 30m
2026-05-17 CSN8004 SVO → WUH May 17, 18:50 UTCMay 17, 22:35 UTC3h 45m
2026-05-17 CSN8003 WUH → SVO May 17, 11:10 UTCMay 17, 15:25 UTC4h 15m
2026-05-16 CSN8003 WUH → SVO May 16, 14:20 UTCMay 17, 14:15 UTC23h 55m
2026-05-16 CSN348 CDG → CAN May 16, 12:21 UTCMay 17, 11:50 UTC23h 30m
2026-05-16 CSN348 CDG → CAN May 16, 10:35 UTCMay 16, 16:55 UTC6h 20m
2026-05-15 CSN347 CAN → CDG May 15, 21:50 UTCMay 16, 04:45 UTC6h 55m
2026-05-15 CSN326 SYD → CAN May 15, 00:15 UTCMay 15, 09:15 UTC9h 0m
2026-05-14 CSN325 CAN → SYD May 14, 13:25 UTCMay 14, 22:10 UTC8h 45m
2026-05-14 CSN382 BNE → CAN May 14, 00:25 UTCMay 14, 07:45 UTC7h 20m
2026-05-13 CSN381 CAN → BNE May 13, 13:45 UTCMay 13, 21:30 UTC7h 45m
2026-05-11 CSN656 SVO → CAN May 11, 18:40 UTCMay 11, 22:15 UTC3h 35m
2026-05-11 CSN655 CAN → SVO May 11, 11:00 UTCMay 11, 15:25 UTC4h 25m
2026-05-10 CSN326 SYD → CAN May 10, 09:20 UTCMay 10, 09:50 UTC30m
2026-05-10 CSN326 SYD → CAN May 10, 00:34 UTCMay 10, 08:30 UTC7h 55m
2026-05-09 CSN325 CAN → SYD May 9, 13:15 UTCMay 9, 21:30 UTC8h 15m
2026-05-09 CSN326 SYD → CAN May 9, 09:05 UTCMay 9, 09:15 UTC10m
2026-05-09 CSN326 SYD → CAN May 9, 00:20 UTCMay 9, 08:10 UTC7h 50m
2026-05-08 CSN325 CAN → SYD May 8, 13:20 UTCMay 8, 21:30 UTC8h 10m
2026-05-08 CSN382 BNE → CAN May 8, 08:55 UTCMay 8, 09:25 UTC30m
2026-05-08 CSN382 BNE → CAN May 8, 00:34 UTCMay 8, 08:09 UTC7h 35m
2026-05-07 CSN381 CAN → BNE May 7, 14:05 UTCMay 7, 21:50 UTC7h 45m

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 10h 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 14 distinct callsigns, including CSN382, CSN326, CSN8003, CSN308, CSN307.