Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast 40m ago
Flights observed
204
Distinct callsigns
20
Country
CN
Last broadcast
40m ago

Last known position

Most recent position reported by Mode-S 781DBA.

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 China Southern Airlines 27 2026-05-27
CSN8118 China Southern Airlines 26 2026-05-30
CSN8117 China Southern Airlines 26 2026-05-30
CSN8353 China Southern Airlines 19 2026-05-30
CSN5031 China Southern Airlines 10 2026-05-13
CSN5032 China Southern Airlines 9 2026-05-13
CSN8048 China Southern Airlines 8 2026-05-29
CSN8047 China Southern Airlines 7 2026-05-29
CSN5795 China Southern Airlines 5 2026-05-28
CSN3649 China Southern Airlines 4 2026-05-28
CSN3213 China Southern Airlines 4 2026-05-24
CSN8735 China Southern Airlines 3 2026-05-15
CSN3214 China Southern Airlines 3 2026-05-24
CSN8736 China Southern Airlines 2 2026-05-15
CSN6549 China Southern Airlines 2 2026-04-24
CSN5387 China Southern Airlines 2 2026-05-24
CSN8965 - 1 2026-04-24
CSN8596 China Southern Airlines 1 2026-05-07
CSN8595 China Southern Airlines 1 2026-05-06
CSN8588 - 1 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN8353 SZX → CGK May 30, 16:05 UTCMay 30, 16:20 UTC15m
2026-05-30 CSN8353 SZX → CGK May 30, 11:55 UTCMay 30, 12:05 UTC10m
2026-05-30 CSN8118 SIN → SZX May 30, 05:40 UTCMay 30, 06:10 UTC30m
2026-05-30 CSN8117 SZX → SIN May 30, 03:20 UTCMay 30, 03:35 UTC15m
2026-05-30 CSN8117 SZX → SIN May 30, 00:15 UTCMay 30, 00:25 UTC10m
2026-05-29 CSN8048 SIN → SZX May 29, 16:50 UTCMay 29, 17:15 UTC25m
2026-05-29 CSN8048 SIN → SZX May 29, 13:35 UTCMay 29, 14:00 UTC25m
2026-05-29 CSN8047 SZX → SIN May 29, 11:30 UTCMay 29, 11:40 UTC10m
2026-05-29 CSN8047 SZX → SIN May 29, 08:35 UTCMay 29, 08:45 UTC10m
2026-05-28 CSN3649 CAN → FOC May 28, 23:25 UTCMay 28, 23:40 UTC15m
2026-05-28 CSN5795 SZX → URC May 28, 01:30 UTCMay 28, 01:40 UTC10m
2026-05-27 CSN8354 CGK → SZX May 27, 21:45 UTCMay 27, 22:00 UTC15m
2026-05-27 CSN8354 CGK → SZX May 27, 17:25 UTCMay 27, 18:45 UTC1h 20m
2026-05-27 CSN8353 SZX → CGK May 27, 11:10 UTCMay 27, 11:20 UTC10m
2026-05-27 CSN8118 SIN → SZX May 27, 09:05 UTCMay 27, 09:25 UTC20m
2026-05-27 CSN8118 SIN → SZX May 27, 05:40 UTCMay 27, 06:04 UTC25m
2026-05-27 CSN8117 SZX → SIN May 27, 03:09 UTCMay 27, 03:24 UTC15m
2026-05-27 CSN8117 SZX → SIN May 27, 00:14 UTCMay 27, 00:30 UTC15m
2026-05-26 CSN3626 KHN → CAN May 26, 12:30 UTCMay 26, 12:50 UTC20m
2026-05-26 CSN3625 CAN → KHN May 26, 06:20 UTCMay 26, 06:29 UTC10m
2026-05-26 CSN3576 SHA → SZX May 26, 03:30 UTCMay 26, 04:24 UTC55m
2026-05-25 CSN3568 SZX → SHA May 25, 23:00 UTCMay 25, 23:10 UTC10m
2026-05-25 CSN3152 PEK → SZX May 25, 07:55 UTCMay 25, 08:05 UTC10m
2026-05-24 CSN5388 NAO → SZX May 24, 14:00 UTCMay 24, 14:10 UTC10m
2026-05-24 CSN5387 SZX → NAO May 24, 08:15 UTCMay 24, 08:30 UTC15m
2026-05-24 CSN3214 XIY → SZX May 24, 06:30 UTCMay 24, 06:40 UTC10m
2026-05-24 CSN3213 SZX → XIY May 24, 00:15 UTCMay 24, 00:30 UTC15m
2026-05-23 CSN3236 CAN → KWL May 23, 16:05 UTCMay 23, 16:35 UTC30m
2026-05-23 CSN8118 SIN → SZX May 23, 09:25 UTCMay 23, 09:45 UTC20m
2026-05-23 CSN8118 SIN → SZX May 23, 06:10 UTCMay 23, 06:25 UTC15m
2026-05-23 CSN8117 SZX → SIN May 23, 03:00 UTCMay 23, 03:25 UTC25m
2026-05-23 CSN8117 SZX → SIN May 23, 00:10 UTCMay 23, 00:20 UTC10m
2026-05-22 CSN8048 SIN → SZX May 22, 16:25 UTCMay 22, 17:00 UTC35m
2026-05-22 CSN8048 SIN → SZX May 22, 13:20 UTCMay 22, 13:45 UTC25m
2026-05-22 CSN8047 SZX → SIN May 22, 11:15 UTCMay 22, 11:35 UTC20m
2026-05-22 CSN8047 SZX → SIN May 22, 08:15 UTCMay 22, 08:25 UTC10m
2026-05-22 CSN3213 SZX → XIY May 22, 00:10 UTCMay 22, 00:20 UTC10m
2026-05-21 CSN6498 SYX → SZX May 21, 20:25 UTCMay 21, 20:50 UTC25m
2026-05-21 CSN6497 SZX → SYX May 21, 16:40 UTCMay 21, 17:00 UTC20m
2026-05-21 CSN8496 XIY → SZX May 21, 13:30 UTCMay 21, 13:45 UTC15m
2026-05-21 CSN8495 SZX → XIY May 21, 05:40 UTCMay 21, 05:50 UTC10m
2026-05-21 CSN8354 CGK → SZX May 21, 02:15 UTCMay 21, 02:30 UTC15m
2026-05-20 CSN8354 CGK → SZX May 20, 21:50 UTCMay 20, 23:15 UTC1h 25m
2026-05-20 CSN8353 SZX → CGK May 20, 20:15 UTCMay 20, 20:25 UTC10m
2026-05-20 CSN8353 SZX → CGK May 20, 16:10 UTCMay 20, 16:20 UTC10m
2026-05-20 CSN8118 SIN → SZX May 20, 09:05 UTCMay 20, 09:35 UTC30m
2026-05-20 CSN8118 SIN → SZX May 20, 05:45 UTCMay 20, 06:00 UTC15m
2026-05-20 CSN8117 SZX → SIN May 20, 03:30 UTCMay 20, 03:45 UTC15m
2026-05-20 CSN8117 SZX → SIN May 20, 00:25 UTCMay 20, 00:35 UTC10m
2026-05-19 CSN5920 CKG → SZX May 19, 15:55 UTCMay 19, 16:05 UTC10m

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?
No active broadcast right now. Last signal was 40m ago.
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, CSN8118, CSN8117, CSN8353, CSN5031.