Apparatus

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sensors Mode-S transponder

781DBA

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-329Z · AIRBUS A-321neo

Hex
781DBA
Octal
36016672
Decimal
7,871,930
Country
CN
Tail
B-329Z
Type
A21N
Broadcasting now · callsign CSN8047 · 10,725 ft
Flights observed
420
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 13:30 UTC

Current position

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

Country allocation

The ICAO 24-bit address 781DBA 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
CSN8354 - 43 2026-07-18
CSN8117 China Southern Airlines 39 2026-07-25
CSN8118 China Southern Airlines 37 2026-07-25
CSN8353 - 33 2026-07-18
CSN8048 China Southern Airlines 14 2026-07-24
CSN5031 - 14 2026-07-11
CSN5032 - 13 2026-07-11
CSN8047 China Southern Airlines 12 2026-07-24
CSN5795 China Southern Airlines 8 2026-06-11
CSN3213 - 7 2026-06-15
CSN3090 - 6 2026-07-19
CSN3089 China Southern Airlines 6 2026-07-19
CSN8098 - 4 2026-07-15
CSN8097 - 4 2026-07-15
CSN3649 China Southern Airlines 4 2026-05-28
CSN8735 China Southern Airlines 3 2026-05-15
CSN8712 China Southern Airlines 3 2026-07-26
CSN8609 - 3 2026-06-24
CSN8504 - 3 2026-07-11
CSN6549 China Southern Airlines 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN6153 SZX → NGB Jul 26, 13:20 UTCJul 26, 13:30 UTC10m
2026-07-26 CSN8712 HGH → SZX Jul 26, 11:10 UTCJul 26, 11:20 UTC10m
2026-07-26 CSN8712 HGH → SZX Jul 26, 09:35 UTCJul 26, 10:30 UTC55m
2026-07-25 CSN6547 SZX → HGH Jul 25, 12:50 UTCJul 25, 13:00 UTC10m
2026-07-25 CSN8118 SIN → SZX Jul 25, 10:10 UTCJul 25, 10:40 UTC30m
2026-07-25 CSN8118 SIN → SZX Jul 25, 05:35 UTCJul 25, 06:05 UTC30m
2026-07-25 CSN8117 SZX → SIN Jul 25, 03:10 UTCJul 25, 03:35 UTC25m
2026-07-25 CSN8117 SZX → SIN Jul 25, 00:15 UTCJul 25, 00:25 UTC10m
2026-07-24 CSN8048 SIN → SZX Jul 24, 17:50 UTCJul 24, 18:10 UTC20m
2026-07-24 CSN8048 SIN → SZX Jul 24, 14:30 UTCJul 24, 14:55 UTC25m
2026-07-24 CSN8047 SZX → SIN Jul 24, 12:20 UTCJul 24, 12:45 UTC25m
2026-07-24 CSN8047 SZX → SIN Jul 24, 09:30 UTCJul 24, 09:40 UTC10m
2026-07-24 CSN6921 SZX → HIA Jul 24, 00:25 UTCJul 24, 00:35 UTC10m
2026-07-23 CSN3370 CGQ → SZX Jul 23, 13:15 UTCJul 23, 13:40 UTC25m
2026-07-23 CSN3369 SZX → CGQ Jul 23, 06:10 UTCJul 23, 10:50 UTC4h 40m
2026-07-23 CSN3369 SZX → CGQ Jul 23, 03:55 UTCJul 23, 04:05 UTC10m
2026-07-22 CSN6549 SZX → NAO Jul 22, 14:45 UTCJul 22, 15:00 UTC15m
2026-07-22 CSN8492 TSN → SZX Jul 22, 13:10 UTCJul 22, 13:25 UTC15m
2026-07-22 - - Jul 22, 03:50 UTCJul 22, 04:10 UTC20m
2026-07-21 CSN3155 SZX → PEK Jul 21, 14:10 UTCJul 21, 14:25 UTC15m
2026-07-21 CSN3552 SHA → SZX Jul 21, 06:25 UTCJul 21, 12:40 UTC6h 15m
2026-07-21 CSN6552 - Jul 21, 01:40 UTCJul 21, 02:05 UTC25m
2026-07-20 CSN6551 SZX → TNA Jul 20, 12:20 UTCJul 20, 12:30 UTC10m
2026-07-20 CSN3455 - Jul 20, 06:00 UTCJul 20, 06:15 UTC15m
2026-07-20 CSN3156 - Jul 20, 04:05 UTCJul 20, 04:15 UTC10m
2026-07-19 CSN3173 - Jul 19, 10:55 UTCJul 19, 11:05 UTC10m
2026-07-19 CSN3090 - Jul 19, 08:35 UTCJul 19, 09:00 UTC25m
2026-07-19 CSN3090 - Jul 19, 05:55 UTCJul 19, 06:30 UTC35m
2026-07-19 CSN3089 SZX → ICN Jul 19, 03:15 UTCJul 19, 03:55 UTC40m
2026-07-19 CSN3089 SZX → ICN Jul 19, 00:55 UTCJul 19, 01:05 UTC10m
2026-07-18 CSN8354 - Jul 18, 22:00 UTCJul 18, 22:20 UTC20m
2026-07-18 CSN8354 - Jul 18, 17:35 UTCJul 18, 19:05 UTC1h 30m
2026-07-18 CSN8353 - Jul 18, 15:20 UTCJul 18, 15:35 UTC15m
2026-07-18 CSN8353 - Jul 18, 11:15 UTCJul 18, 11:25 UTC10m
2026-07-18 CSN3090 - Jul 18, 08:35 UTCJul 18, 08:55 UTC20m
2026-07-18 CSN3090 - Jul 18, 06:00 UTCJul 18, 06:45 UTC45m
2026-07-18 CSN3089 SZX → ICN Jul 18, 03:15 UTCJul 18, 03:55 UTC40m
2026-07-18 CSN3089 SZX → ICN Jul 18, 00:55 UTCJul 18, 01:05 UTC10m
2026-07-17 CSN8592 - Jul 17, 13:40 UTCJul 17, 13:50 UTC10m
2026-07-17 CSN8591 - Jul 17, 02:10 UTCJul 17, 02:25 UTC15m
2026-07-17 CSN8354 - Jul 17, 00:04 UTCJul 17, 00:20 UTC15m
2026-07-16 CSN8354 - Jul 16, 19:35 UTCJul 16, 21:05 UTC1h 30m
2026-07-16 CSN8353 - Jul 16, 17:35 UTCJul 16, 17:49 UTC15m
2026-07-16 CSN8353 - Jul 16, 13:20 UTCJul 16, 13:40 UTC20m
2026-07-16 CSN3090 - Jul 16, 08:45 UTCJul 16, 08:55 UTC10m
2026-07-16 CSN3090 - Jul 16, 05:55 UTCJul 16, 06:40 UTC45m
2026-07-16 CSN3089 - Jul 16, 03:20 UTCJul 16, 04:10 UTC50m
2026-07-16 CSN3089 - Jul 16, 00:55 UTCJul 16, 01:10 UTC15m
2026-07-15 CSN8098 - Jul 15, 16:35 UTCJul 15, 16:45 UTC10m
2026-07-15 CSN8098 - Jul 15, 12:40 UTCJul 15, 13:00 UTC20m

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

Mode-S 781DBA frequently asked

What is Mode-S code 781DBA?
781DBA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-329Z.
Where is Mode-S 781DBA registered?
Mode-S code 781DBA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781DBA broadcasting right now?
Yes. Mode-S 781DBA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781DBA, octal 36016672, decimal 7,871,930.
What flights does 781DBA operate?
Mode-S 781DBA has broadcast 20 distinct callsigns, including CSN8354, CSN8117, CSN8118, CSN8353, CSN8048.