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
No current signal · last broadcast 2d ago
Flights observed
169
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781DAC.

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 20 distinct

Callsign Airline Flights Last seen
CSN302 China Southern Airlines 25 2026-07-06
CSN306 China Southern Airlines 16 2026-06-06
CSN346 - 14 2026-06-24
CSN301 - 13 2026-07-06
CSN345 China Southern Airlines 12 2026-06-23
CSN322 - 12 2026-06-25
CSN674 - 11 2026-07-09
CSN349 - 11 2026-06-29
CSN305 China Southern Airlines 9 2026-06-05
CSN347 China Southern Airlines 8 2026-06-29
CSN673 - 6 2026-07-08
CSN350 China Southern Airlines 6 2026-06-08
CSN321 China Southern Airlines 6 2026-06-24
CSN348 China Southern Airlines 4 2026-06-30
CSN655 - 3 2026-07-15
CSN303 - 3 2026-07-04
CSN656 - 2 2026-07-15
CSN316 - 2 2026-07-13
CSN315 - 2 2026-07-12
CSN6902 China Southern Airlines 1 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 CSN656 - Jul 15, 18:30 UTCJul 15, 22:20 UTC3h 50m
2026-07-15 CSN655 - Jul 15, 11:15 UTCJul 15, 15:40 UTC4h 25m
2026-07-14 CSN3523 - Jul 14, 01:15 UTCJul 14, 01:45 UTC30m
2026-07-13 CSN316 - Jul 13, 00:45 UTCJul 13, 01:10 UTC25m
2026-07-12 CSN315 - Jul 12, 13:10 UTCJul 12, 13:30 UTC20m
2026-07-11 CSN316 - Jul 11, 00:50 UTCJul 11, 01:05 UTC15m
2026-07-10 CSN315 - Jul 10, 12:45 UTCJul 10, 13:10 UTC25m
2026-07-09 CSN674 - Jul 9, 05:20 UTCJul 9, 05:30 UTC10m
2026-07-08 CSN674 - Jul 8, 20:35 UTCJul 9, 03:00 UTC6h 25m
2026-07-08 CSN673 - Jul 8, 09:55 UTCJul 8, 16:30 UTC6h 35m
2026-07-06 CSN302 SYD → CAN Jul 6, 20:20 UTCJul 6, 20:40 UTC20m
2026-07-06 CSN302 SYD → CAN Jul 6, 11:55 UTCJul 6, 19:30 UTC7h 35m
2026-07-06 CSN301 - Jul 6, 00:45 UTCJul 6, 09:05 UTC8h 20m
2026-07-04 CSN304 - Jul 4, 22:00 UTCJul 5, 04:15 UTC6h 15m
2026-07-04 CSN303 - Jul 4, 13:05 UTCJul 4, 20:00 UTC6h 55m
2026-07-03 CSN303 - Jul 3, 20:25 UTCJul 4, 19:00 UTC22h 35m
2026-07-03 CSN303 - Jul 3, 18:35 UTCJul 4, 16:50 UTC22h 15m
2026-07-03 CSN655 - Jul 3, 15:15 UTCJul 3, 15:45 UTC30m
2026-07-02 CSN656 - Jul 2, 18:40 UTCJul 3, 11:55 UTC17h 15m
2026-07-02 CSN655 - Jul 2, 11:05 UTCJul 2, 15:15 UTC4h 10m
2026-07-01 CSN302 SYD → CAN Jul 1, 20:40 UTCJul 1, 21:05 UTC25m
2026-07-01 CSN302 SYD → CAN Jul 1, 12:00 UTCJul 1, 19:45 UTC7h 45m
2026-07-01 CSN301 - Jul 1, 00:45 UTCJul 1, 09:10 UTC8h 25m
2026-06-30 CSN348 CDG → CAN Jun 30, 11:15 UTCJun 30, 17:35 UTC6h 20m
2026-06-29 CSN347 CAN → CDG Jun 29, 22:05 UTCJun 30, 05:25 UTC7h 21m
2026-06-29 CSN347 CAN → CDG Jun 29, 09:10 UTCJun 30, 05:25 UTC20h 16m
2026-06-29 CSN347 CAN → CDG Jun 29, 06:34 UTCJun 30, 05:00 UTC22h 26m
2026-06-29 CSN349 - Jun 29, 03:49 UTCJun 29, 05:04 UTC1h 15m
2026-06-29 CSN349 - Jun 29, 01:14 UTCJun 29, 01:25 UTC10m
2026-06-28 CSN348 CDG → CAN Jun 28, 10:35 UTCJun 28, 17:00 UTC6h 25m
2026-06-27 CSN347 CAN → CDG Jun 27, 23:34 UTCJun 28, 06:34 UTC7h 0m
2026-06-27 CSN347 CAN → CDG Jun 27, 09:04 UTCJun 28, 06:34 UTC21h 30m
2026-06-27 CSN347 CAN → CDG Jun 27, 06:40 UTCJun 28, 04:59 UTC22h 20m
2026-06-27 CSN349 - Jun 27, 04:29 UTCJun 27, 05:04 UTC35m
2026-06-27 CSN349 - Jun 27, 01:54 UTCJun 27, 02:04 UTC10m
2026-06-26 CSN348 CDG → CAN Jun 26, 12:24 UTCJun 26, 19:00 UTC6h 35m
2026-06-25 CSN347 CAN → CDG Jun 25, 22:14 UTCJun 26, 04:59 UTC6h 45m
2026-06-25 CSN322 - Jun 25, 09:05 UTCJun 25, 09:25 UTC20m
2026-06-25 CSN322 - Jun 25, 00:35 UTCJun 25, 08:14 UTC7h 40m
2026-06-24 CSN321 CAN → MEL Jun 24, 14:04 UTCJun 24, 22:19 UTC8h 15m
2026-06-24 CSN346 - Jun 24, 04:39 UTCJun 24, 04:50 UTC10m
2026-06-23 CSN346 - Jun 23, 20:04 UTCJun 24, 02:09 UTC6h 5m
2026-06-23 CSN345 PEK → AMS Jun 23, 06:34 UTCJun 23, 15:59 UTC9h 25m
2026-06-22 CSN674 LHR → PKX Jun 22, 05:10 UTCJun 22, 05:24 UTC15m
2026-06-21 CSN674 LHR → PKX Jun 21, 20:24 UTCJun 22, 02:40 UTC6h 15m
2026-06-21 CSN673 - Jun 21, 06:50 UTCJun 21, 16:54 UTC10h 5m
2026-06-20 CSN674 LHR → PKX Jun 20, 05:24 UTCJun 20, 05:34 UTC10m
2026-06-19 CSN674 LHR → PKX Jun 19, 20:40 UTCJun 20, 02:54 UTC6h 15m
2026-06-19 CSN673 - Jun 19, 10:09 UTCJun 19, 16:59 UTC6h 50m
2026-06-17 CSN346 - Jun 17, 20:00 UTCJun 18, 02:00 UTC6h 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-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?
No active broadcast right now. Last signal was 2d ago.
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 20 distinct callsigns, including CSN302, CSN306, CSN346, CSN301, CSN345.