Apparatus

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sensors Mode-S transponder

781949

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30F9 · AIRBUS A-350-900

Hex
781949
Octal
36014511
Decimal
7,870,793
Country
CN
Tail
B-30F9
Type
A359
Broadcasting now · callsign CSN308 · 37,000 ft
Flights observed
84
Distinct callsigns
12
Country
CN
Last broadcast
1h ago

Current position

781949 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781949 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 12 distinct

Callsign Airline Flights Last seen
CSN326 China Southern Airlines 21 2026-05-27
CSN382 China Southern Airlines 17 2026-05-13
CSN325 China Southern Airlines 12 2026-05-26
CSN381 China Southern Airlines 11 2026-05-12
CSN308 China Southern Airlines 6 2026-05-30
CSN307 China Southern Airlines 6 2026-05-29
CSN322 China Southern Airlines 4 2026-04-13
CSN348 China Southern Airlines 2 2026-05-23
CSN347 China Southern Airlines 2 2026-05-22
CSN3906 China Southern Airlines 1 2026-04-19
CSN350 China Southern Airlines 1 2026-05-11
CSN349 China Southern Airlines 1 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN308 AMS → CAN May 30, 12:05 UTCMay 30, 12:15 UTC10m
2026-05-29 CSN307 CAN → AMS May 29, 21:35 UTCMay 30, 04:05 UTC6h 30m
2026-05-28 CSN308 AMS → CAN May 28, 12:05 UTCMay 28, 18:15 UTC6h 10m
2026-05-28 CSN307 CAN → AMS May 28, 01:55 UTCMay 28, 08:10 UTC6h 15m
2026-05-27 CSN326 SYD → CAN May 27, 08:40 UTCMay 27, 09:00 UTC20m
2026-05-27 CSN326 SYD → CAN May 27, 00:19 UTCMay 27, 07:50 UTC7h 31m
2026-05-26 CSN325 CAN → SYD May 26, 13:15 UTCMay 26, 21:40 UTC8h 25m
2026-05-25 CSN326 SYD → CAN May 25, 09:40 UTCMay 25, 09:55 UTC15m
2026-05-25 CSN326 SYD → CAN May 25, 08:20 UTCMay 25, 08:50 UTC30m
2026-05-24 CSN325 CAN → SYD May 24, 13:15 UTCMay 24, 21:20 UTC8h 5m
2026-05-23 CSN348 CDG → CAN May 23, 11:35 UTCMay 23, 17:50 UTC6h 15m
2026-05-22 CSN347 CAN → CDG May 22, 22:10 UTCMay 23, 05:20 UTC7h 9m
2026-05-21 CSN348 CDG → CAN May 21, 10:30 UTCMay 21, 15:15 UTC4h 45m
2026-05-20 CSN347 CAN → CDG May 20, 22:00 UTCMay 21, 05:05 UTC7h 5m
2026-05-20 CSN326 SYD → CAN May 20, 08:45 UTCMay 20, 09:05 UTC20m
2026-05-20 CSN326 SYD → CAN May 20, 00:25 UTCMay 20, 08:00 UTC7h 36m
2026-05-19 CSN325 CAN → SYD May 19, 13:20 UTCMay 19, 21:30 UTC8h 10m
2026-05-19 CSN326 SYD → CAN May 19, 09:15 UTCMay 19, 09:30 UTC15m
2026-05-19 CSN326 SYD → CAN May 19, 00:35 UTCMay 19, 08:20 UTC7h 45m
2026-05-18 CSN325 CAN → SYD May 18, 13:10 UTCMay 18, 21:20 UTC8h 9m
2026-05-18 CSN326 SYD → CAN May 18, 09:35 UTCMay 18, 09:45 UTC10m
2026-05-18 CSN326 SYD → CAN May 18, 00:45 UTCMay 18, 08:35 UTC7h 50m
2026-05-17 CSN325 CAN → SYD May 17, 13:15 UTCMay 17, 21:20 UTC8h 5m
2026-05-14 CSN326 SYD → CAN May 14, 00:10 UTCMay 14, 07:40 UTC7h 30m
2026-05-13 CSN325 CAN → SYD May 13, 13:20 UTCMay 13, 21:45 UTC8h 25m
2026-05-13 CSN382 BNE → CAN May 13, 09:05 UTCMay 13, 09:20 UTC15m
2026-05-13 CSN382 BNE → CAN May 13, 00:55 UTCMay 13, 08:20 UTC7h 25m
2026-05-12 CSN381 CAN → BNE May 12, 13:30 UTCMay 12, 21:15 UTC7h 45m
2026-05-12 CSN382 BNE → CAN May 12, 08:30 UTCMay 12, 08:45 UTC15m
2026-05-12 CSN382 BNE → CAN May 12, 06:55 UTCMay 12, 07:45 UTC50m
2026-05-11 CSN381 CAN → BNE May 11, 13:30 UTCMay 11, 21:15 UTC7h 45m
2026-05-11 CSN350 KUL → CAN May 11, 06:15 UTCMay 11, 06:40 UTC25m
2026-05-11 CSN349 CAN → KUL May 11, 04:10 UTCMay 11, 04:40 UTC30m
2026-05-10 CSN308 AMS → CAN May 10, 11:55 UTCMay 10, 17:40 UTC5h 45m
2026-05-09 CSN307 CAN → AMS May 9, 21:40 UTCMay 10, 04:19 UTC6h 40m
2026-05-08 CSN326 SYD → CAN May 8, 10:25 UTCMay 8, 10:54 UTC30m
2026-05-08 CSN326 SYD → CAN May 8, 01:45 UTCMay 8, 09:34 UTC7h 50m
2026-05-07 CSN325 CAN → SYD May 7, 13:30 UTCMay 7, 21:45 UTC8h 15m
2026-05-06 CSN308 AMS → CAN May 6, 11:45 UTCMay 6, 17:20 UTC5h 35m
2026-05-05 CSN307 CAN → AMS May 5, 23:00 UTCMay 6, 04:10 UTC5h 10m
2026-05-02 CSN308 AMS → CAN May 2, 11:40 UTCMay 2, 17:30 UTC5h 50m
2026-05-01 CSN307 CAN → AMS May 1, 21:25 UTCMay 2, 04:05 UTC6h 41m
2026-05-01 CSN326 SYD → CAN May 1, 08:40 UTCMay 1, 08:55 UTC15m
2026-05-01 CSN326 SYD → CAN May 1, 00:25 UTCMay 1, 07:45 UTC7h 20m
2026-04-30 CSN325 CAN → SYD Apr 30, 13:20 UTCApr 30, 21:45 UTC8h 25m
2026-04-29 CSN382 BNE → CAN Apr 29, 08:40 UTCApr 29, 09:05 UTC26m
2026-04-29 CSN382 BNE → CAN Apr 29, 00:40 UTCApr 29, 07:40 UTC7h 0m
2026-04-28 CSN381 CAN → BNE Apr 28, 14:15 UTCApr 28, 22:15 UTC8h 0m
2026-04-28 CSN382 BNE → CAN Apr 28, 08:20 UTCApr 28, 08:50 UTC30m
2026-04-28 CSN382 BNE → CAN Apr 28, 00:30 UTCApr 28, 07:30 UTC7h 0m

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-30F9 page for operator, model, and routing details .

Mode-S 781949 frequently asked

What is Mode-S code 781949?
781949 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30F9.
Where is Mode-S 781949 registered?
Mode-S code 781949 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781949 broadcasting right now?
Yes. Mode-S 781949 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781949, octal 36014511, decimal 7,870,793.
What flights does 781949 operate?
Mode-S 781949 has broadcast 12 distinct callsigns, including CSN326, CSN382, CSN325, CSN381, CSN308.