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 Jul 26, 15:55 UTC
Flights observed
397
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 15:55 UTC

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 Shenzhen Airlines 39 2026-07-26
CSZ9101 Shenzhen Airlines 32 2026-06-29
CSZ9109 Shenzhen Airlines 23 2026-07-26
CSZ9812 Shenzhen Airlines 19 2026-06-15
CSZ9811 - 14 2026-06-15
CSZ9104 Shenzhen Airlines 14 2026-07-25
CSZ9108 Shenzhen Airlines 13 2026-07-24
CSZ9103 Shenzhen Airlines 11 2026-07-25
CSZ9948 - 10 2026-07-11
CSZ9947 - 9 2026-07-11
CSZ9107 Shenzhen Airlines 9 2026-07-24
CSZ9467 - 8 2026-07-19
CSZ9929 - 7 2026-06-22
CSZ9810 - 7 2026-06-30
CSZ9514 - 7 2026-07-20
CSZ9468 Shenzhen Airlines 7 2026-07-19
CSZ9809 - 6 2026-06-30
CSZ9513 - 6 2026-07-20
CSZ9502 - 6 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSZ9110 PEK → SZX Jul 26, 15:45 UTCJul 26, 15:55 UTC10m
2026-07-26 CSZ9110 PEK → SZX Jul 26, 13:20 UTCJul 26, 13:30 UTC10m
2026-07-26 CSZ9109 SZX → PEK Jul 26, 08:20 UTCJul 26, 08:30 UTC10m
2026-07-25 CSZ9104 PEK → SZX Jul 25, 10:55 UTCJul 25, 11:10 UTC15m
2026-07-25 CSZ9104 PEK → SZX Jul 25, 07:00 UTCJul 25, 07:25 UTC25m
2026-07-25 CSZ9103 SZX → PEK Jul 25, 04:00 UTCJul 25, 04:40 UTC40m
2026-07-25 CSZ9103 SZX → PEK Jul 25, 02:05 UTCJul 25, 02:20 UTC15m
2026-07-24 CSZ9108 PEK → SZX Jul 24, 14:00 UTCJul 24, 14:10 UTC10m
2026-07-24 CSZ9108 PEK → SZX Jul 24, 11:20 UTCJul 24, 12:00 UTC40m
2026-07-24 CSZ9107 SZX → PEK Jul 24, 08:20 UTCJul 24, 08:50 UTC30m
2026-07-24 CSZ9107 SZX → PEK Jul 24, 06:30 UTCJul 24, 06:45 UTC15m
2026-07-24 CSZ9802 PEK → SZX Jul 24, 04:20 UTCJul 24, 05:05 UTC45m
2026-07-23 CSZ9801 SZX → PEK Jul 23, 23:30 UTCJul 23, 23:40 UTC10m
2026-07-23 CSZ9108 PEK → SZX Jul 23, 14:35 UTCJul 23, 14:45 UTC10m
2026-07-23 CSZ9108 PEK → SZX Jul 23, 11:45 UTCJul 23, 12:00 UTC15m
2026-07-23 CSZ9107 SZX → PEK Jul 23, 09:05 UTCJul 23, 09:15 UTC10m
2026-07-23 CSZ9107 SZX → PEK Jul 23, 06:40 UTCJul 23, 06:55 UTC15m
2026-07-23 CSZ9882 HGH → SZX Jul 23, 04:05 UTCJul 23, 04:20 UTC15m
2026-07-22 CSZ9881 SZX → HGH Jul 22, 23:30 UTCJul 22, 23:40 UTC10m
2026-07-22 CSZ9108 PEK → SZX Jul 22, 15:30 UTCJul 22, 15:50 UTC20m
2026-07-22 CSZ9108 PEK → SZX Jul 22, 12:40 UTCJul 22, 13:05 UTC25m
2026-07-22 CSZ9882 HGH → SZX Jul 22, 03:35 UTCJul 22, 04:20 UTC45m
2026-07-21 CSZ9881 SZX → HGH Jul 21, 23:20 UTCJul 21, 23:30 UTC10m
2026-07-21 CSZ9108 PEK → SZX Jul 21, 15:10 UTCJul 21, 15:40 UTC30m
2026-07-21 CSZ9108 PEK → SZX Jul 21, 12:40 UTCJul 21, 13:00 UTC20m
2026-07-21 CSZ9107 SZX → PEK Jul 21, 06:45 UTCJul 21, 06:55 UTC10m
2026-07-21 CSZ9882 HGH → SZX Jul 21, 03:45 UTCJul 21, 04:30 UTC45m
2026-07-20 CSZ9881 SZX → HGH Jul 20, 23:30 UTCJul 20, 23:40 UTC10m
2026-07-20 CSZ9110 - Jul 20, 20:30 UTCJul 20, 20:50 UTC20m
2026-07-20 CSZ9110 - Jul 20, 17:30 UTCJul 20, 17:45 UTC15m
2026-07-20 CSZ9109 - Jul 20, 11:35 UTCJul 20, 12:15 UTC40m
2026-07-20 CSZ9109 - Jul 20, 09:05 UTCJul 20, 09:20 UTC15m
2026-07-20 CSZ9514 - Jul 20, 05:30 UTCJul 20, 06:30 UTC1h 0m
2026-07-20 CSZ9513 - Jul 20, 00:50 UTCJul 20, 01:05 UTC15m
2026-07-19 CSZ9468 CKG → SZX Jul 19, 17:15 UTCJul 19, 17:25 UTC10m
2026-07-19 CSZ9467 - Jul 19, 11:15 UTCJul 19, 11:30 UTC15m
2026-07-19 CSZ9104 - Jul 19, 07:20 UTCJul 19, 07:30 UTC10m
2026-07-19 CSZ9103 SZX → PEK Jul 19, 04:40 UTCJul 19, 04:50 UTC10m
2026-07-19 CSZ9103 SZX → PEK Jul 19, 02:05 UTCJul 19, 02:20 UTC15m
2026-07-18 CSZ9110 - Jul 18, 16:40 UTCJul 18, 17:05 UTC25m
2026-07-18 CSZ9110 - Jul 18, 14:10 UTCJul 18, 14:30 UTC20m
2026-07-18 CSZ9514 - Jul 18, 06:45 UTCJul 18, 07:05 UTC20m
2026-07-18 CSZ9513 - Jul 18, 00:45 UTCJul 18, 00:55 UTC10m
2026-07-17 CSZ9108 - Jul 17, 13:45 UTCJul 17, 14:10 UTC25m
2026-07-17 CSZ9108 - Jul 17, 11:25 UTCJul 17, 11:39 UTC15m
2026-07-17 CSZ9107 - Jul 17, 09:10 UTCJul 17, 09:20 UTC10m
2026-07-17 CSZ9107 - Jul 17, 06:35 UTCJul 17, 06:54 UTC20m
2026-07-17 CSZ9882 - Jul 17, 03:45 UTCJul 17, 04:25 UTC40m
2026-07-16 CSZ9881 - Jul 16, 23:15 UTCJul 16, 23:25 UTC10m
2026-07-16 CSZ9467 - Jul 16, 12:09 UTCJul 16, 12:30 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-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 Jul 26, 15:55 UTC.
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.