Apparatus

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sensors Mode-S transponder

781F38

ICAO 24-bit transponder address · allocated to China

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

Hex
781F38
Octal
36017470
Decimal
7,872,312
Country
CN
Tail
B-32DU
Type
A21N
Broadcasting now · callsign CSZ9809 · 17,775 ft
Flights observed
340
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 14:20 UTC

Current position

781F38 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781F38 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
CSZ9110 Shenzhen Airlines 20 2026-07-21
CSZ9106 Shenzhen Airlines 18 2026-07-24
CSZ9074 Shenzhen Airlines 18 2026-07-23
CSZ9073 Shenzhen Airlines 17 2026-07-23
CSZ9105 Shenzhen Airlines 16 2026-07-24
CSZ9114 Shenzhen Airlines 15 2026-07-24
CSZ9109 Shenzhen Airlines 12 2026-07-21
CSZ9802 Shenzhen Airlines 11 2026-07-23
CSZ9801 Shenzhen Airlines 11 2026-07-20
CSZ9947 - 10 2026-06-15
CSZ9102 Shenzhen Airlines 10 2026-06-13
CSZ9505 - 8 2026-07-17
CSZ9209 - 8 2026-07-14
CSZ9812 Shenzhen Airlines 7 2026-06-14
CSZ9811 Shenzhen Airlines 7 2026-06-14
CSZ9514 - 7 2026-07-21
CSZ9512 - 7 2026-06-30
CSZ9506 - 7 2026-07-17
CSZ9113 Shenzhen Airlines 7 2026-07-23
CSZ9108 Shenzhen Airlines 7 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSZ9108 PEK → SZX Jul 26, 14:00 UTCJul 26, 14:20 UTC20m
2026-07-26 CSZ9108 PEK → SZX Jul 26, 11:25 UTCJul 26, 11:40 UTC15m
2026-07-26 CSZ9107 SZX → PEK Jul 26, 09:15 UTCJul 26, 09:25 UTC10m
2026-07-26 CSZ9107 SZX → PEK Jul 26, 06:40 UTCJul 26, 06:50 UTC10m
2026-07-25 CSZ9108 PEK → SZX Jul 25, 11:50 UTCJul 25, 12:10 UTC20m
2026-07-25 CSZ9107 SZX → PEK Jul 25, 10:15 UTCJul 25, 10:25 UTC10m
2026-07-25 CSZ9107 SZX → PEK Jul 25, 07:20 UTCJul 25, 07:35 UTC15m
2026-07-25 CSZ9882 HGH → SZX Jul 25, 04:05 UTCJul 25, 04:25 UTC20m
2026-07-24 CSZ9318 CGO → SZX Jul 24, 16:40 UTCJul 24, 16:50 UTC10m
2026-07-24 CSZ9313 SZX → HAK Jul 24, 13:45 UTCJul 24, 13:55 UTC10m
2026-07-24 CSZ9106 PEK → SZX Jul 24, 12:10 UTCJul 24, 12:20 UTC10m
2026-07-24 CSZ9106 PEK → SZX Jul 24, 09:30 UTCJul 24, 10:10 UTC40m
2026-07-24 CSZ9105 SZX → PEK Jul 24, 06:50 UTCJul 24, 07:25 UTC35m
2026-07-24 CSZ9105 SZX → PEK Jul 24, 05:00 UTCJul 24, 05:15 UTC15m
2026-07-24 CSZ9114 PEK → SZX Jul 24, 00:25 UTCJul 24, 00:45 UTC20m
2026-07-23 CSZ9113 SZX → PEK Jul 23, 13:05 UTCJul 23, 13:15 UTC10m
2026-07-23 CSZ9074 TPE → SZX Jul 23, 09:50 UTCJul 23, 11:10 UTC1h 20m
2026-07-23 CSZ9073 SZX → TPE Jul 23, 06:55 UTCJul 23, 08:25 UTC1h 30m
2026-07-23 CSZ9802 PEK → SZX Jul 23, 04:40 UTCJul 23, 05:20 UTC40m
2026-07-22 CSZ9467 - Jul 22, 11:40 UTCJul 22, 11:55 UTC15m
2026-07-22 CSZ9103 SZX → PEK Jul 22, 02:05 UTCJul 22, 02:20 UTC15m
2026-07-21 CSZ9110 PEK → SZX Jul 21, 17:00 UTCJul 21, 17:25 UTC25m
2026-07-21 CSZ9110 PEK → SZX Jul 21, 14:30 UTCJul 21, 14:50 UTC20m
2026-07-21 CSZ9109 SZX → PEK Jul 21, 10:55 UTCJul 21, 11:20 UTC25m
2026-07-21 CSZ9109 SZX → PEK Jul 21, 08:25 UTCJul 21, 08:40 UTC15m
2026-07-21 CSZ9514 - Jul 21, 06:00 UTCJul 21, 07:00 UTC1h 0m
2026-07-21 CSZ9513 - Jul 21, 00:50 UTCJul 21, 01:00 UTC10m
2026-07-20 CSZ9108 PEK → SZX Jul 20, 17:10 UTCJul 20, 17:20 UTC10m
2026-07-20 CSZ9108 PEK → SZX Jul 20, 14:15 UTCJul 20, 14:40 UTC25m
2026-07-20 CSZ9107 SZX → PEK Jul 20, 07:40 UTCJul 20, 07:55 UTC15m
2026-07-20 CSZ9801 SZX → PEK Jul 20, 00:00 UTCJul 20, 00:15 UTC15m
2026-07-19 CSZ9108 PEK → SZX Jul 19, 15:50 UTCJul 19, 16:10 UTC20m
2026-07-19 CSZ9108 PEK → SZX Jul 19, 13:15 UTCJul 19, 13:35 UTC20m
2026-07-19 CSZ9107 - Jul 19, 11:10 UTCJul 19, 11:20 UTC10m
2026-07-19 CSZ9107 - Jul 19, 08:40 UTCJul 19, 09:00 UTC20m
2026-07-19 CSZ9514 - Jul 19, 04:55 UTCJul 19, 06:20 UTC1h 25m
2026-07-19 CSZ9513 - Jul 19, 00:35 UTCJul 19, 00:45 UTC10m
2026-07-18 CSZ9318 CGO → SZX Jul 18, 17:10 UTCJul 18, 17:30 UTC20m
2026-07-18 CSZ9313 - Jul 18, 14:20 UTCJul 18, 14:35 UTC15m
2026-07-18 CSZ9106 - Jul 18, 12:55 UTCJul 18, 13:05 UTC10m
2026-07-18 CSZ9106 - Jul 18, 10:20 UTCJul 18, 10:35 UTC15m
2026-07-18 CSZ9105 - Jul 18, 07:10 UTCJul 18, 07:25 UTC15m
2026-07-18 CSZ9105 - Jul 18, 04:40 UTCJul 18, 04:50 UTC10m
2026-07-18 CSZ9114 PEK → SZX Jul 18, 02:50 UTCJul 18, 03:00 UTC10m
2026-07-18 CSZ9114 PEK → SZX Jul 18, 00:15 UTCJul 18, 00:35 UTC20m
2026-07-17 CSZ9113 - Jul 17, 13:10 UTCJul 17, 13:20 UTC10m
2026-07-17 CSZ9506 - Jul 17, 10:00 UTCJul 17, 10:55 UTC55m
2026-07-17 CSZ9505 - Jul 17, 05:10 UTCJul 17, 05:25 UTC15m
2026-07-17 CSZ9114 PEK → SZX Jul 17, 02:50 UTCJul 17, 03:05 UTC15m
2026-07-17 CSZ9114 PEK → SZX Jul 17, 00:10 UTCJul 17, 00:30 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-32DU page for operator, model, and routing details .

Mode-S 781F38 frequently asked

What is Mode-S code 781F38?
781F38 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32DU.
Where is Mode-S 781F38 registered?
Mode-S code 781F38 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F38 broadcasting right now?
Yes. Mode-S 781F38 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F38, octal 36017470, decimal 7,872,312.
What flights does 781F38 operate?
Mode-S 781F38 has broadcast 20 distinct callsigns, including CSZ9110, CSZ9106, CSZ9074, CSZ9073, CSZ9105.