Apparatus

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sensors Mode-S transponder

781DAC

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-329S · AIRBUS A-350-900

Hex
781DAC
Octal
36016654
Decimal
7,871,916
Country
CN
Tail
B-329S
Type
A359
Broadcasting now · callsign CSN302 · 38,000 ft
Flights observed
91
Distinct callsigns
12
Country
CN
Last broadcast
6h ago

Current position

781DAC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781DAC 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
CSN306 China Southern Airlines 13 2026-05-22
CSN302 China Southern Airlines 12 2026-06-02
CSN322 China Southern Airlines 10 2026-05-21
CSN346 China Southern Airlines 8 2026-05-30
CSN345 China Southern Airlines 8 2026-05-30
CSN305 China Southern Airlines 8 2026-05-21
CSN301 China Southern Airlines 7 2026-06-02
CSN349 China Southern Airlines 6 2026-05-20
CSN674 China Southern Airlines 5 2026-05-26
CSN350 China Southern Airlines 5 2026-05-20
CSN321 China Southern Airlines 5 2026-05-20
CSN673 China Southern Airlines 3 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CSN302 SYD → CAN Jun 2, 11:55 UTCJun 2, 12:50 UTC55m
2026-06-02 CSN301 CAN → SYD Jun 2, 00:35 UTCJun 2, 09:05 UTC8h 30m
2026-06-01 CSN302 SYD → CAN Jun 1, 11:45 UTCJun 1, 20:45 UTC9h 0m
2026-06-01 CSN301 CAN → SYD Jun 1, 00:45 UTCJun 1, 09:15 UTC8h 30m
2026-05-30 CSN346 AMS → PKX May 30, 20:20 UTCMay 30, 23:45 UTC3h 25m
2026-05-30 CSN345 PEK → AMS May 30, 06:35 UTCMay 30, 16:10 UTC9h 35m
2026-05-29 CSN346 AMS → PKX May 29, 05:15 UTCMay 29, 05:25 UTC10m
2026-05-28 CSN346 AMS → PKX May 28, 20:30 UTCMay 29, 02:50 UTC6h 20m
2026-05-28 CSN345 PEK → AMS May 28, 06:50 UTCMay 28, 16:30 UTC9h 40m
2026-05-26 CSN674 LHR → PKX May 26, 05:15 UTCMay 26, 05:25 UTC10m
2026-05-25 CSN674 LHR → PKX May 25, 20:19 UTCMay 26, 02:39 UTC6h 20m
2026-05-25 CSN673 PKX → LHR May 25, 10:00 UTCMay 25, 17:05 UTC7h 5m
2026-05-22 CSN306 AKL → CAN May 22, 09:40 UTCMay 22, 20:35 UTC10h 55m
2026-05-21 CSN305 CAN → AKL May 21, 17:50 UTCMay 22, 03:55 UTC10h 5m
2026-05-21 CSN322 MEL → CAN May 21, 08:50 UTCMay 21, 09:10 UTC20m
2026-05-21 CSN322 MEL → CAN May 21, 00:30 UTCMay 21, 08:00 UTC7h 30m
2026-05-20 CSN321 CAN → MEL May 20, 14:05 UTCMay 20, 22:35 UTC8h 30m
2026-05-20 CSN350 KUL → CAN May 20, 06:30 UTCMay 20, 06:45 UTC15m
2026-05-20 CSN349 CAN → KUL May 20, 01:30 UTCMay 20, 04:45 UTC3h 16m
2026-05-19 CSN302 SYD → CAN May 19, 20:50 UTCMay 19, 21:05 UTC15m
2026-05-19 CSN302 SYD → CAN May 19, 12:15 UTCMay 19, 20:00 UTC7h 45m
2026-05-19 CSN301 CAN → SYD May 19, 00:35 UTCMay 19, 08:45 UTC8h 10m
2026-05-18 CSN306 AKL → CAN May 18, 20:10 UTCMay 18, 20:40 UTC30m
2026-05-18 CSN306 AKL → CAN May 18, 09:35 UTCMay 18, 19:25 UTC9h 49m
2026-05-17 CSN305 CAN → AKL May 17, 17:15 UTCMay 18, 03:25 UTC10h 10m
2026-05-17 CSN350 KUL → CAN May 17, 06:15 UTCMay 17, 06:40 UTC25m
2026-05-17 CSN349 CAN → KUL May 17, 03:50 UTCMay 17, 04:10 UTC20m
2026-05-16 CSN302 SYD → CAN May 16, 20:25 UTCMay 16, 20:45 UTC20m
2026-05-16 CSN302 SYD → CAN May 16, 11:55 UTCMay 16, 19:30 UTC7h 35m
2026-05-16 CSN301 CAN → SYD May 16, 00:50 UTCMay 16, 09:06 UTC8h 16m
2026-05-15 CSN306 AKL → CAN May 15, 20:05 UTCMay 15, 20:25 UTC20m
2026-05-15 CSN306 AKL → CAN May 15, 09:35 UTCMay 15, 19:20 UTC9h 44m
2026-05-14 CSN305 CAN → AKL May 14, 17:10 UTCMay 15, 03:20 UTC10h 10m
2026-05-13 CSN674 LHR → PKX May 13, 21:05 UTCMay 14, 03:25 UTC6h 20m
2026-05-13 CSN673 PKX → LHR May 13, 08:20 UTCMay 13, 17:05 UTC8h 45m
2026-05-11 CSN346 AMS → PKX May 11, 20:00 UTCMay 11, 22:35 UTC2h 34m
2026-05-11 CSN345 PEK → AMS May 11, 08:55 UTCMay 11, 17:00 UTC8h 5m
2026-05-09 CSN350 KUL → CAN May 9, 06:10 UTCMay 9, 06:20 UTC10m
2026-05-09 CSN349 CAN → KUL May 9, 03:50 UTCMay 9, 04:15 UTC25m
2026-05-09 CSN349 CAN → KUL May 9, 01:10 UTCMay 9, 01:20 UTC10m
2026-05-08 CSN302 SYD → CAN May 8, 20:30 UTCMay 8, 20:55 UTC25m
2026-05-08 CSN302 SYD → CAN May 8, 11:49 UTCMay 8, 19:40 UTC7h 50m
2026-05-08 CSN301 CAN → SYD May 8, 01:04 UTCMay 8, 09:14 UTC8h 10m
2026-05-07 CSN322 MEL → CAN May 7, 09:10 UTCMay 7, 09:40 UTC30m
2026-05-07 CSN322 MEL → CAN May 7, 00:45 UTCMay 7, 08:15 UTC7h 30m
2026-05-06 CSN321 CAN → MEL May 6, 13:45 UTCMay 6, 22:20 UTC8h 34m
2026-05-06 CSN322 MEL → CAN May 6, 08:55 UTCMay 6, 09:25 UTC30m
2026-05-06 CSN322 MEL → CAN May 6, 00:31 UTCMay 6, 08:05 UTC7h 35m
2026-05-05 CSN321 CAN → MEL May 5, 13:50 UTCMay 5, 22:10 UTC8h 20m
2026-05-05 CSN322 MEL → CAN May 5, 09:05 UTCMay 5, 09:35 UTC30m

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-329S page for operator, model, and routing details .

Mode-S 781DAC frequently asked

What is Mode-S code 781DAC?
781DAC is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-329S.
Where is Mode-S 781DAC registered?
Mode-S code 781DAC is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781DAC broadcasting right now?
Yes. Mode-S 781DAC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781DAC, octal 36016654, decimal 7,871,916.
What flights does 781DAC operate?
Mode-S 781DAC has broadcast 12 distinct callsigns, including CSN306, CSN302, CSN322, CSN346, CSN345.