Apparatus

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sensors Mode-S transponder

781A89

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-320Y · AIRBUS A-321neo

Hex
781A89
Octal
36015211
Decimal
7,871,113
Country
CN
Tail
B-320Y
Type
A21N
No current signal · last broadcast 15h ago
Flights observed
174
Distinct callsigns
20
Country
CN
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 781A89.

Country allocation

The ICAO 24-bit address 781A89 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
CSN388 - 21 2026-07-08
CSN626 - 15 2026-07-05
CSN625 - 15 2026-07-04
CSN8336 - 14 2026-06-18
CSN3038 - 14 2026-07-13
CSN387 China Southern Airlines 11 2026-07-07
CSN3037 - 11 2026-07-13
CSN8335 - 8 2026-06-18
CSN8482 - 7 2026-06-28
CSN8481 - 7 2026-06-27
CSN8138 - 5 2026-06-18
CSN8159 - 4 2026-06-17
CSN8137 - 4 2026-06-17
CSN8490 - 3 2026-07-11
CSN8489 - 3 2026-07-11
CSN5047 - 3 2026-07-09
CSN390 - 3 2026-07-12
CSN3086 - 3 2026-06-29
CSN3085 - 3 2026-06-28
CSN5256 - 2 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSN3038 - Jul 13, 10:55 UTCJul 13, 11:25 UTC30m
2026-07-13 CSN3038 - Jul 13, 06:45 UTCJul 13, 08:15 UTC1h 30m
2026-07-13 CSN3037 - Jul 13, 04:40 UTCJul 13, 04:55 UTC15m
2026-07-13 CSN3037 - Jul 13, 00:40 UTCJul 13, 00:55 UTC15m
2026-07-12 CSN390 - Jul 12, 07:15 UTCJul 12, 08:15 UTC1h 0m
2026-07-12 CSN389 - Jul 12, 03:50 UTCJul 12, 04:55 UTC1h 5m
2026-07-11 CSN8490 - Jul 11, 20:25 UTCJul 11, 23:50 UTC3h 25m
2026-07-11 CSN8489 - Jul 11, 18:30 UTCJul 11, 18:45 UTC15m
2026-07-11 CSN8489 - Jul 11, 15:30 UTCJul 11, 15:40 UTC10m
2026-07-11 CSN3724 - Jul 11, 02:40 UTCJul 11, 03:05 UTC25m
2026-07-09 CSN5047 - Jul 9, 11:35 UTCJul 9, 11:50 UTC15m
2026-07-09 CSN5047 - Jul 9, 08:40 UTCJul 9, 08:50 UTC10m
2026-07-09 CSN396 - Jul 9, 01:05 UTCJul 9, 01:15 UTC10m
2026-07-08 CSN395 - Jul 8, 12:05 UTCJul 8, 12:20 UTC15m
2026-07-08 CSN388 - Jul 8, 02:15 UTCJul 8, 06:35 UTC4h 20m
2026-07-07 CSN387 CAN → CGK Jul 7, 17:05 UTCJul 7, 17:20 UTC15m
2026-07-07 CSN3850 - Jul 7, 10:30 UTCJul 7, 10:50 UTC20m
2026-07-05 CSN626 - Jul 5, 00:10 UTCJul 5, 00:25 UTC15m
2026-07-04 CSN625 - Jul 4, 14:30 UTCJul 4, 22:20 UTC7h 50m
2026-07-04 CSN3038 - Jul 4, 12:10 UTCJul 4, 12:25 UTC15m
2026-07-04 CSN3038 - Jul 4, 08:05 UTCJul 4, 09:30 UTC1h 25m
2026-07-04 CSN3037 - Jul 4, 06:15 UTCJul 4, 06:30 UTC15m
2026-07-04 CSN3037 - Jul 4, 02:05 UTCJul 4, 02:15 UTC10m
2026-07-03 CSN626 - Jul 3, 21:20 UTCJul 3, 21:35 UTC15m
2026-07-03 CSN625 - Jul 3, 11:30 UTCJul 3, 19:25 UTC7h 55m
2026-07-01 CSN604 - Jul 1, 09:20 UTCJul 1, 09:35 UTC15m
2026-07-01 CSN603 - Jul 1, 07:10 UTCJul 1, 07:40 UTC30m
2026-06-29 CSN5256 - Jun 29, 15:49 UTCJun 29, 16:19 UTC30m
2026-06-29 CSN5255 - Jun 29, 08:14 UTCJun 29, 14:50 UTC6h 35m
2026-06-29 CSN3086 - Jun 29, 02:05 UTCJun 29, 03:39 UTC1h 35m
2026-06-28 CSN3085 - Jun 28, 10:00 UTCJun 28, 11:25 UTC1h 25m
2026-06-28 CSN8482 - Jun 28, 05:04 UTCJun 28, 05:24 UTC20m
2026-06-27 CSN8481 - Jun 27, 19:15 UTCJun 28, 03:14 UTC8h 0m
2026-06-27 CSN3489 - Jun 27, 11:55 UTCJun 27, 12:19 UTC25m
2026-06-26 CSN626 - Jun 26, 01:39 UTCJun 26, 01:54 UTC15m
2026-06-25 CSN625 - Jun 25, 15:50 UTCJun 26, 00:50 UTC9h 0m
2026-06-25 CSN388 - Jun 25, 06:30 UTCJun 25, 07:05 UTC35m
2026-06-25 CSN388 - Jun 25, 02:30 UTCJun 25, 03:54 UTC1h 25m
2026-06-24 CSN387 CAN → CGK Jun 24, 16:29 UTCJun 24, 16:40 UTC10m
2026-06-24 CSN387 CAN → CGK Jun 24, 12:30 UTCJun 24, 12:40 UTC10m
2026-06-23 CSN5048 PEN → CAN Jun 23, 13:34 UTCJun 23, 13:45 UTC10m
2026-06-23 CSN5048 PEN → CAN Jun 23, 11:14 UTCJun 23, 11:24 UTC10m
2026-06-23 CSN5047 - Jun 23, 09:20 UTCJun 23, 09:34 UTC15m
2026-06-22 CSN3497 CAN → KMG Jun 22, 23:39 UTCJun 23, 00:39 UTC1h 0m
2026-06-22 CSN388 - Jun 22, 06:54 UTCJun 22, 07:14 UTC20m
2026-06-22 CSN388 - Jun 22, 02:45 UTCJun 22, 04:15 UTC1h 30m
2026-06-20 CSN8490 - Jun 20, 23:14 UTCJun 20, 23:34 UTC20m
2026-06-20 CSN8490 - Jun 20, 20:09 UTCJun 20, 20:34 UTC25m
2026-06-20 CSN8489 - Jun 20, 15:24 UTCJun 20, 18:24 UTC3h 0m
2026-06-20 CSN3038 - Jun 20, 10:34 UTCJun 20, 10:49 UTC15m

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-320Y page for operator, model, and routing details .

Mode-S 781A89 frequently asked

What is Mode-S code 781A89?
781A89 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-320Y.
Where is Mode-S 781A89 registered?
Mode-S code 781A89 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781A89 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781A89, octal 36015211, decimal 7,871,113.
What flights does 781A89 operate?
Mode-S 781A89 has broadcast 20 distinct callsigns, including CSN388, CSN626, CSN625, CSN8336, CSN3038.