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
No current signal · last broadcast 1h ago
Flights observed
188
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781949.

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 20 distinct

Callsign Airline Flights Last seen
CSN326 - 45 2026-07-14
CSN325 - 25 2026-07-14
CSN382 China Southern Airlines 17 2026-05-13
CSN306 - 14 2026-07-08
CSN308 - 13 2026-07-10
CSN307 - 12 2026-07-09
CSN381 China Southern Airlines 11 2026-05-12
CSN354 - 8 2026-07-09
CSN305 - 8 2026-07-07
CSN353 - 7 2026-07-09
CSN338 - 7 2026-06-29
CSN337 - 6 2026-06-29
CSN322 China Southern Airlines 4 2026-04-13
CSN348 China Southern Airlines 2 2026-05-23
CSN347 China Southern Airlines 2 2026-05-22
CSN303 - 2 2026-07-11
CSN3906 China Southern Airlines 1 2026-04-19
CSN3503 China Southern Airlines 1 2026-06-08
CSN350 China Southern Airlines 1 2026-05-11
CSN349 China Southern Airlines 1 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN325 - Jul 14, 13:40 UTCJul 14, 15:30 UTC1h 50m
2026-07-14 CSN326 - Jul 14, 08:35 UTCJul 14, 09:05 UTC30m
2026-07-14 CSN326 - Jul 14, 00:20 UTCJul 14, 07:45 UTC7h 25m
2026-07-13 CSN325 - Jul 13, 13:20 UTCJul 13, 22:15 UTC8h 55m
2026-07-13 CSN326 - Jul 13, 08:55 UTCJul 13, 09:25 UTC30m
2026-07-13 CSN326 - Jul 13, 00:30 UTCJul 13, 08:05 UTC7h 35m
2026-07-12 CSN325 - Jul 12, 14:01 UTCJul 12, 22:35 UTC8h 35m
2026-07-11 CSN304 - Jul 11, 21:35 UTCJul 12, 04:05 UTC6h 30m
2026-07-11 CSN303 - Jul 11, 11:10 UTCJul 11, 18:00 UTC6h 50m
2026-07-10 CSN303 - Jul 10, 17:20 UTCJul 11, 16:15 UTC22h 56m
2026-07-10 CSN308 - Jul 10, 14:20 UTCJul 11, 14:15 UTC23h 56m
2026-07-10 CSN308 - Jul 10, 12:20 UTCJul 11, 11:55 UTC23h 35m
2026-07-10 CSN308 - Jul 10, 12:00 UTCJul 10, 17:55 UTC5h 55m
2026-07-09 CSN307 - Jul 9, 21:30 UTCJul 10, 04:15 UTC6h 45m
2026-07-09 CSN354 - Jul 9, 09:10 UTCJul 9, 09:50 UTC40m
2026-07-09 CSN354 - Jul 9, 06:05 UTCJul 9, 06:35 UTC30m
2026-07-09 CSN353 - Jul 9, 04:00 UTCJul 9, 04:30 UTC30m
2026-07-09 CSN353 - Jul 9, 01:30 UTCJul 9, 01:40 UTC10m
2026-07-08 CSN306 - Jul 8, 20:30 UTCJul 8, 20:45 UTC15m
2026-07-08 CSN306 - Jul 8, 09:40 UTCJul 8, 19:40 UTC10h 0m
2026-07-07 CSN305 - Jul 7, 17:25 UTCJul 8, 03:30 UTC10h 5m
2026-07-07 CSN354 - Jul 7, 09:50 UTCJul 7, 10:15 UTC25m
2026-07-07 CSN354 - Jul 7, 06:55 UTCJul 7, 07:25 UTC30m
2026-07-07 CSN353 - Jul 7, 04:10 UTCJul 7, 04:40 UTC30m
2026-07-06 CSN326 - Jul 6, 09:25 UTCJul 6, 10:10 UTC45m
2026-07-06 CSN326 - Jul 6, 01:15 UTCJul 6, 08:40 UTC7h 25m
2026-07-05 CSN325 - Jul 5, 13:15 UTCJul 5, 21:45 UTC8h 30m
2026-07-05 CSN354 - Jul 5, 09:00 UTCJul 5, 09:20 UTC20m
2026-07-05 CSN354 - Jul 5, 06:00 UTCJul 5, 06:25 UTC25m
2026-07-05 CSN353 - Jul 5, 03:30 UTCJul 5, 04:00 UTC30m
2026-07-05 CSN353 - Jul 5, 00:55 UTCJul 5, 01:05 UTC10m
2026-07-04 CSN306 AKL → CAN Jul 4, 20:45 UTCJul 4, 20:55 UTC10m
2026-07-04 CSN306 AKL → CAN Jul 4, 09:35 UTCJul 4, 19:45 UTC10h 10m
2026-07-03 CSN305 - Jul 3, 18:15 UTCJul 4, 04:20 UTC10h 5m
2026-07-03 CSN354 - Jul 3, 09:15 UTCJul 3, 09:35 UTC20m
2026-07-03 CSN354 - Jul 3, 06:15 UTCJul 3, 06:45 UTC30m
2026-07-03 CSN353 - Jul 3, 03:50 UTCJul 3, 04:25 UTC35m
2026-07-03 CSN353 - Jul 3, 01:15 UTCJul 3, 01:25 UTC10m
2026-07-02 CSN306 AKL → CAN Jul 2, 20:25 UTCJul 2, 20:45 UTC20m
2026-07-02 CSN306 AKL → CAN Jul 2, 09:40 UTCJul 2, 19:40 UTC10h 0m
2026-07-01 CSN305 - Jul 1, 17:35 UTCJul 2, 03:45 UTC10h 10m
2026-07-01 CSN326 - Jul 1, 08:55 UTCJul 1, 09:25 UTC30m
2026-07-01 CSN326 - Jul 1, 00:25 UTCJul 1, 08:05 UTC7h 40m
2026-06-30 CSN325 - Jun 30, 13:35 UTCJun 30, 21:55 UTC8h 20m
2026-06-30 CSN326 - Jun 30, 09:00 UTCJun 30, 09:45 UTC45m
2026-06-30 CSN326 - Jun 30, 00:35 UTCJun 30, 08:15 UTC7h 41m
2026-06-29 CSN325 - Jun 29, 13:24 UTCJun 29, 21:39 UTC8h 15m
2026-06-29 CSN338 - Jun 29, 06:24 UTCJun 29, 07:09 UTC45m
2026-06-29 CSN337 - Jun 29, 04:00 UTCJun 29, 04:34 UTC35m
2026-06-28 CSN306 AKL → CAN Jun 28, 20:14 UTCJun 28, 20:50 UTC35m

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?
No active broadcast right now. Last signal was 1h ago.
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 20 distinct callsigns, including CSN326, CSN325, CSN382, CSN306, CSN308.