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
No current signal · last broadcast 10h ago
Flights observed
367
Distinct callsigns
20
Country
CN
Last broadcast
10h 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 39 2026-07-08
CSN8117 - 37 2026-07-13
CSN8118 - 35 2026-07-13
CSN8353 - 29 2026-07-07
CSN5031 - 14 2026-07-11
CSN5032 - 13 2026-07-11
CSN8048 - 12 2026-06-28
CSN8047 - 10 2026-06-28
CSN5795 China Southern Airlines 8 2026-06-11
CSN3213 - 7 2026-06-15
CSN3649 China Southern Airlines 4 2026-05-28
CSN8735 China Southern Airlines 3 2026-05-15
CSN8609 - 3 2026-06-24
CSN8504 - 3 2026-07-11
CSN6497 - 3 2026-07-13
CSN5845 - 3 2026-06-25
CSN5387 China Southern Airlines 3 2026-06-14
CSN3588 China Southern Airlines 3 2026-06-16
CSN3587 - 3 2026-06-16
CSN3568 China Southern Airlines 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN3577 - Jul 14, 12:40 UTCJul 14, 12:50 UTC10m
2026-07-14 CSN8712 - Jul 14, 07:25 UTCJul 14, 07:40 UTC15m
2026-07-14 CSN8711 - Jul 14, 02:30 UTCJul 14, 02:40 UTC10m
2026-07-13 CSN6497 - Jul 13, 12:45 UTCJul 13, 12:55 UTC10m
2026-07-13 CSN8118 - Jul 13, 05:40 UTCJul 13, 06:05 UTC25m
2026-07-13 CSN8117 - Jul 13, 03:20 UTCJul 13, 03:55 UTC35m
2026-07-13 CSN8117 - Jul 13, 00:35 UTCJul 13, 00:45 UTC10m
2026-07-12 CSN8098 - Jul 12, 12:55 UTCJul 12, 13:05 UTC10m
2026-07-12 CSN8098 - Jul 12, 09:30 UTCJul 12, 09:45 UTC15m
2026-07-12 CSN8097 - Jul 12, 07:05 UTCJul 12, 07:40 UTC35m
2026-07-12 CSN8097 - Jul 12, 04:20 UTCJul 12, 04:30 UTC10m
2026-07-12 CSN8578 - Jul 12, 01:25 UTCJul 12, 01:45 UTC20m
2026-07-11 CSN8577 - Jul 11, 13:35 UTCJul 11, 13:50 UTC15m
2026-07-11 CSN5032 - Jul 11, 11:10 UTCJul 11, 11:25 UTC15m
2026-07-11 CSN5032 - Jul 11, 07:55 UTCJul 11, 08:10 UTC15m
2026-07-11 CSN5031 - Jul 11, 05:50 UTCJul 11, 06:15 UTC25m
2026-07-11 CSN5031 - Jul 11, 02:55 UTCJul 11, 03:15 UTC20m
2026-07-11 CSN8504 - Jul 11, 00:05 UTCJul 11, 00:25 UTC20m
2026-07-10 CSN8503 - Jul 10, 14:25 UTCJul 10, 14:35 UTC10m
2026-07-10 CSN5634 - Jul 10, 10:05 UTCJul 10, 10:30 UTC25m
2026-07-10 CSN5633 - Jul 10, 04:10 UTCJul 10, 04:20 UTC10m
2026-07-10 CSN8504 - Jul 10, 02:20 UTCJul 10, 02:30 UTC10m
2026-07-09 CSN3552 - Jul 9, 12:10 UTCJul 9, 12:45 UTC35m
2026-07-09 CSN3551 - Jul 9, 04:25 UTCJul 9, 04:35 UTC10m
2026-07-09 CSN3590 - Jul 9, 02:20 UTCJul 9, 02:30 UTC10m
2026-07-08 CSN3589 - Jul 8, 13:10 UTCJul 8, 13:20 UTC10m
2026-07-08 CSN8084 - Jul 8, 08:50 UTCJul 8, 09:10 UTC20m
2026-07-08 CSN8083 - Jul 8, 05:55 UTCJul 8, 07:20 UTC1h 25m
2026-07-08 CSN8354 CGK → SZX Jul 8, 02:25 UTCJul 8, 02:50 UTC25m
2026-07-07 CSN8354 CGK → SZX Jul 7, 21:55 UTCJul 7, 23:20 UTC1h 25m
2026-07-07 CSN8353 - Jul 7, 20:05 UTCJul 7, 20:25 UTC20m
2026-07-07 CSN8353 - Jul 7, 16:05 UTCJul 7, 16:15 UTC10m
2026-07-07 CSN6592 - Jul 7, 07:25 UTCJul 7, 08:05 UTC40m
2026-07-06 CSN3172 - Jul 6, 13:25 UTCJul 6, 13:40 UTC15m
2026-07-06 CSN3169 - Jul 6, 04:35 UTCJul 6, 04:45 UTC10m
2026-07-06 CSN8504 - Jul 6, 01:35 UTCJul 6, 02:00 UTC25m
2026-07-05 CSN8503 - Jul 5, 16:10 UTCJul 5, 16:25 UTC15m
2026-07-05 CSN6480 - Jul 5, 13:40 UTCJul 5, 14:00 UTC20m
2026-07-05 CSN6479 - Jul 5, 06:55 UTCJul 5, 07:05 UTC10m
2026-07-05 CSN3570 - Jul 5, 05:20 UTCJul 5, 05:30 UTC10m
2026-07-04 CSN8354 CGK → SZX Jul 4, 22:00 UTCJul 4, 22:20 UTC20m
2026-07-04 CSN8354 CGK → SZX Jul 4, 17:40 UTCJul 4, 19:10 UTC1h 30m
2026-07-04 CSN8353 - Jul 4, 15:30 UTCJul 4, 15:50 UTC20m
2026-07-04 CSN8353 - Jul 4, 11:35 UTCJul 4, 11:45 UTC10m
2026-07-04 CSN8118 - Jul 4, 09:40 UTCJul 4, 09:50 UTC10m
2026-07-04 CSN8118 - Jul 4, 06:15 UTCJul 4, 06:40 UTC25m
2026-07-04 CSN8117 - Jul 4, 04:20 UTCJul 4, 04:40 UTC20m
2026-07-04 CSN8117 - Jul 4, 01:15 UTCJul 4, 01:25 UTC10m
2026-07-03 CSN8700 - Jul 3, 20:30 UTCJul 3, 20:40 UTC10m
2026-07-03 CSN8699 - Jul 3, 11:50 UTCJul 3, 12:00 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 10h 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, CSN8117, CSN8118, CSN8353, CSN5031.