Apparatus

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sensors Mode-S transponder

781F3A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32DS · AIRBUS A-321neo

Hex
781F3A
Octal
36017472
Decimal
7,872,314
Country
CN
Tail
B-32DS
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
339
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781F3A.

Country allocation

The ICAO 24-bit address 781F3A 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
CSZ9102 - 48 2026-06-30
CSZ9110 - 32 2026-07-14
CSZ9101 Shenzhen Airlines 32 2026-06-29
CSZ9109 - 20 2026-07-14
CSZ9812 Shenzhen Airlines 19 2026-06-15
CSZ9811 - 14 2026-06-15
CSZ9948 - 10 2026-07-11
CSZ9947 - 9 2026-07-11
CSZ9104 - 8 2026-07-10
CSZ9929 - 7 2026-06-22
CSZ9810 - 7 2026-06-30
CSZ9809 - 6 2026-06-30
CSZ9502 - 6 2026-06-24
CSZ9514 - 5 2026-07-14
CSZ9501 - 5 2026-06-24
CSZ9468 - 5 2026-07-09
CSZ9467 - 5 2026-07-10
CSZ9106 Shenzhen Airlines 5 2026-06-03
CSZ9103 - 5 2026-07-10
CSZ9930 - 4 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSZ9110 - Jul 14, 13:15 UTCJul 14, 13:40 UTC25m
2026-07-14 CSZ9109 - Jul 14, 08:25 UTCJul 14, 08:45 UTC20m
2026-07-14 CSZ9514 - Jul 14, 05:30 UTCJul 14, 06:20 UTC50m
2026-07-13 CSZ9108 - Jul 13, 11:40 UTCJul 13, 12:00 UTC20m
2026-07-13 CSZ9107 - Jul 13, 06:35 UTCJul 13, 06:50 UTC15m
2026-07-13 CSZ9802 - Jul 13, 04:15 UTCJul 13, 05:01 UTC45m
2026-07-12 CSZ9801 - Jul 12, 23:35 UTCJul 12, 23:50 UTC15m
2026-07-12 CSZ9108 - Jul 12, 13:55 UTCJul 12, 14:05 UTC10m
2026-07-12 CSZ9108 - Jul 12, 11:20 UTCJul 12, 11:40 UTC20m
2026-07-12 CSZ9107 - Jul 12, 06:30 UTCJul 12, 06:50 UTC20m
2026-07-11 CSZ9948 - Jul 11, 13:35 UTCJul 11, 13:55 UTC20m
2026-07-11 CSZ9947 - Jul 11, 09:15 UTCJul 11, 09:25 UTC10m
2026-07-11 CSZ9944 - Jul 11, 07:00 UTCJul 11, 07:15 UTC15m
2026-07-11 CSZ9943 - Jul 11, 00:45 UTCJul 11, 00:55 UTC10m
2026-07-10 CSZ9467 - Jul 10, 11:40 UTCJul 10, 11:55 UTC15m
2026-07-10 CSZ9104 - Jul 10, 09:55 UTCJul 10, 10:10 UTC15m
2026-07-10 CSZ9104 - Jul 10, 07:15 UTCJul 10, 07:35 UTC20m
2026-07-10 CSZ9103 - Jul 10, 02:30 UTCJul 10, 02:40 UTC10m
2026-07-09 CSZ9468 - Jul 9, 19:00 UTCJul 9, 19:15 UTC15m
2026-07-09 CSZ9104 - Jul 9, 11:10 UTCJul 9, 11:20 UTC10m
2026-07-09 CSZ9104 - Jul 9, 08:40 UTCJul 9, 08:55 UTC15m
2026-07-09 CSZ9103 - Jul 9, 04:55 UTCJul 9, 05:05 UTC10m
2026-07-09 CSZ9103 - Jul 9, 02:25 UTCJul 9, 02:35 UTC10m
2026-07-08 CSZ9468 - Jul 8, 19:20 UTCJul 8, 19:50 UTC30m
2026-07-08 CSZ9467 - Jul 8, 13:05 UTCJul 8, 13:15 UTC10m
2026-07-08 CSZ9103 - Jul 8, 02:20 UTCJul 8, 02:35 UTC15m
2026-07-07 CSZ9074 - Jul 7, 17:20 UTCJul 7, 18:45 UTC1h 25m
2026-07-07 CSZ9073 - Jul 7, 14:05 UTCJul 7, 15:30 UTC1h 25m
2026-07-07 CSZ9944 - Jul 7, 10:05 UTCJul 7, 10:20 UTC15m
2026-07-07 CSZ9943 - Jul 7, 01:05 UTCJul 7, 01:20 UTC15m
2026-07-06 CSZ9110 - Jul 6, 20:55 UTCJul 6, 21:20 UTC25m
2026-07-06 CSZ9110 - Jul 6, 17:45 UTCJul 6, 18:05 UTC20m
2026-07-06 CSZ9109 - Jul 6, 10:45 UTCJul 6, 11:00 UTC15m
2026-07-06 CSZ9514 - Jul 6, 08:30 UTCJul 6, 08:45 UTC15m
2026-07-06 CSZ9513 - Jul 6, 01:35 UTCJul 6, 08:00 UTC6h 25m
2026-07-06 CSZ9513 - Jul 6, 00:35 UTCJul 6, 00:45 UTC10m
2026-07-05 CSZ9468 - Jul 5, 17:25 UTCJul 5, 17:45 UTC20m
2026-07-05 CSZ9467 - Jul 5, 12:30 UTCJul 5, 12:50 UTC20m
2026-07-05 CSZ9104 - Jul 5, 10:05 UTCJul 5, 10:15 UTC10m
2026-07-05 CSZ9104 - Jul 5, 07:15 UTCJul 5, 07:35 UTC20m
2026-07-04 CSZ9468 - Jul 4, 20:10 UTCJul 4, 20:30 UTC20m
2026-07-04 CSZ9467 - Jul 4, 13:35 UTCJul 4, 13:50 UTC15m
2026-07-04 CSZ9104 - Jul 4, 11:35 UTCJul 4, 12:10 UTC35m
2026-07-04 CSZ9104 - Jul 4, 09:05 UTCJul 4, 09:20 UTC15m
2026-07-04 CSZ9103 - Jul 4, 02:15 UTCJul 4, 02:30 UTC15m
2026-07-03 CSZ9468 - Jul 3, 22:05 UTCJul 3, 22:15 UTC10m
2026-07-03 CSZ9467 - Jul 3, 13:05 UTCJul 3, 13:20 UTC15m
2026-07-03 - - Jul 3, 11:25 UTCJul 3, 11:35 UTC10m
2026-07-03 CSZ9203 - Jul 3, 02:55 UTCJul 3, 03:05 UTC10m
2026-07-02 CSZ9522 - Jul 2, 13:05 UTCJul 2, 13:20 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-32DS page for operator, model, and routing details .

Mode-S 781F3A frequently asked

What is Mode-S code 781F3A?
781F3A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32DS.
Where is Mode-S 781F3A registered?
Mode-S code 781F3A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F3A broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F3A, octal 36017472, decimal 7,872,314.
What flights does 781F3A operate?
Mode-S 781F3A has broadcast 20 distinct callsigns, including CSZ9102, CSZ9110, CSZ9101, CSZ9109, CSZ9812.