Apparatus

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sensors Mode-S transponder

781F74

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32EE · AIRBUS A-350-900

Hex
781F74
Octal
36017564
Decimal
7,872,372
Country
CN
Tail
B-32EE
Type
A359
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
173
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S 781F74.

Country allocation

The ICAO 24-bit address 781F74 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
CSN302 - 35 2026-07-18
CSN301 China Southern Airlines 21 2026-07-18
CSN322 China Southern Airlines 16 2026-07-26
CSN349 China Southern Airlines 13 2026-06-05
CSN321 China Southern Airlines 12 2026-07-26
CSN350 China Southern Airlines 11 2026-06-05
CSN346 - 11 2026-06-14
CSN306 - 9 2026-07-09
CSN345 China Southern Airlines 7 2026-06-20
CSN347 China Southern Airlines 5 2026-06-24
CSN305 - 5 2026-07-08
CSN674 China Southern Airlines 4 2026-05-08
CSN8050 China Southern Airlines 3 2026-07-19
CSN8049 - 3 2026-07-19
CSN6902 China Southern Airlines 2 2026-06-12
CSN6901 China Southern Airlines 2 2026-06-13
CSN673 China Southern Airlines 2 2026-05-07
CSN382 - 2 2026-07-07
CSN348 China Southern Airlines 2 2026-06-25
CSN346D - 2 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN321 CAN → MEL Jul 26, 15:20 UTCJul 26, 22:35 UTC7h 15m
2026-07-26 CSN322 MEL → CAN Jul 26, 09:25 UTCJul 26, 09:35 UTC10m
2026-07-26 CSN322 MEL → CAN Jul 26, 00:45 UTCJul 26, 08:25 UTC7h 41m
2026-07-25 CSN321 CAN → MEL Jul 25, 14:40 UTCJul 25, 22:55 UTC8h 15m
2026-07-25 CSN322 MEL → CAN Jul 25, 00:25 UTCJul 25, 08:25 UTC8h 0m
2026-07-24 CSN321 CAN → MEL Jul 24, 14:10 UTCJul 24, 22:15 UTC8h 5m
2026-07-24 CSN322 MEL → CAN Jul 24, 01:15 UTCJul 24, 10:25 UTC9h 10m
2026-07-23 CSN321 CAN → MEL Jul 23, 14:50 UTCJul 23, 23:05 UTC8h 15m
2026-07-23 CSN316 ICN → PKX Jul 23, 00:55 UTCJul 23, 01:20 UTC25m
2026-07-22 CSN315 PKX → ICN Jul 22, 12:35 UTCJul 22, 12:55 UTC20m
2026-07-19 CSN8050 MEL → PKX Jul 19, 21:20 UTCJul 20, 00:00 UTC2h 40m
2026-07-19 CSN8049 - Jul 19, 11:55 UTCJul 19, 18:55 UTC7h 0m
2026-07-18 CSN302 - Jul 18, 20:10 UTCJul 18, 20:30 UTC20m
2026-07-18 CSN302 - Jul 18, 11:55 UTCJul 18, 19:20 UTC7h 25m
2026-07-18 CSN301 CAN → SYD Jul 18, 00:29 UTCJul 18, 09:05 UTC8h 36m
2026-07-17 CSN302 - Jul 17, 20:00 UTCJul 17, 20:20 UTC20m
2026-07-17 CSN302 - Jul 17, 11:55 UTCJul 17, 19:15 UTC7h 20m
2026-07-17 CSN301 - Jul 17, 00:30 UTCJul 17, 09:40 UTC9h 10m
2026-07-15 CSN322 - Jul 15, 09:20 UTCJul 15, 09:45 UTC25m
2026-07-15 CSN322 - Jul 15, 01:15 UTCJul 15, 08:25 UTC7h 10m
2026-07-14 CSN321 - Jul 14, 14:15 UTCJul 14, 23:05 UTC8h 49m
2026-07-14 CSN322 - Jul 14, 09:10 UTCJul 14, 09:25 UTC15m
2026-07-14 CSN322 - Jul 14, 00:50 UTCJul 14, 08:15 UTC7h 25m
2026-07-13 CSN321 - Jul 13, 13:50 UTCJul 13, 22:45 UTC8h 55m
2026-07-12 CSN8050 - Jul 12, 21:35 UTCJul 13, 04:00 UTC6h 25m
2026-07-12 CSN8049 - Jul 12, 11:30 UTCJul 12, 18:55 UTC7h 25m
2026-07-11 CSN302 - Jul 11, 20:45 UTCJul 11, 21:05 UTC20m
2026-07-11 CSN302 - Jul 11, 11:50 UTCJul 11, 20:00 UTC8h 10m
2026-07-11 CSN301 - Jul 11, 00:45 UTCJul 11, 09:05 UTC8h 20m
2026-07-10 CSN302 - Jul 10, 21:00 UTCJul 10, 21:40 UTC40m
2026-07-10 CSN302 - Jul 10, 12:25 UTCJul 10, 19:50 UTC7h 25m
2026-07-10 CSN301 - Jul 10, 01:20 UTCJul 10, 10:10 UTC8h 50m
2026-07-09 CSN306 - Jul 9, 21:40 UTCJul 9, 22:05 UTC25m
2026-07-09 CSN306 - Jul 9, 10:10 UTCJul 9, 20:55 UTC10h 45m
2026-07-08 CSN305 - Jul 8, 17:30 UTCJul 9, 03:30 UTC10h 0m
2026-07-08 CSN322 - Jul 8, 09:45 UTCJul 8, 09:55 UTC10m
2026-07-08 CSN322 - Jul 8, 00:45 UTCJul 8, 08:50 UTC8h 5m
2026-07-07 CSN321 CAN → MEL Jul 7, 14:50 UTCJul 7, 21:35 UTC6h 45m
2026-07-07 CSN321 CAN → MEL Jul 7, 13:30 UTCJul 7, 13:50 UTC20m
2026-07-07 CSN382 - Jul 7, 08:35 UTCJul 7, 08:50 UTC15m
2026-07-07 CSN382 - Jul 7, 00:35 UTCJul 7, 07:50 UTC7h 15m
2026-07-06 CSN381 - Jul 6, 14:00 UTCJul 6, 22:00 UTC8h 0m
2026-07-05 CSN8050 LGW → ABA Jul 5, 21:30 UTCJul 6, 04:05 UTC6h 35m
2026-07-05 CSN8049 - Jul 5, 11:45 UTCJul 5, 18:45 UTC7h 0m
2026-07-02 CSN302 SYD → CAN Jul 2, 20:55 UTCJul 2, 21:15 UTC20m
2026-07-02 CSN302 SYD → CAN Jul 2, 12:15 UTCJul 2, 20:05 UTC7h 50m
2026-07-02 CSN301 - Jul 2, 00:40 UTCJul 2, 08:55 UTC8h 15m
2026-06-27 CSN322 - Jun 27, 12:09 UTCJun 27, 12:29 UTC20m
2026-06-27 CSN322 - Jun 27, 03:44 UTCJun 27, 11:20 UTC7h 35m
2026-06-26 CSN321 CAN → MEL Jun 26, 18:04 UTCJun 27, 01:19 UTC7h 15m

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-32EE page for operator, model, and routing details .

Mode-S 781F74 frequently asked

What is Mode-S code 781F74?
781F74 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32EE.
Where is Mode-S 781F74 registered?
Mode-S code 781F74 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F74 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F74, octal 36017564, decimal 7,872,372.
What flights does 781F74 operate?
Mode-S 781F74 has broadcast 20 distinct callsigns, including CSN302, CSN301, CSN322, CSN349, CSN321.