Apparatus

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sensors Mode-S transponder

781F37

ICAO 24-bit transponder address · allocated to China

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

Hex
781F37
Octal
36017467
Decimal
7,872,311
Country
CN
Tail
B-32DV
Type
A21N
No current signal · last broadcast 14h ago
Flights observed
145
Distinct callsigns
20
Country
CN
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 781F37.

Country allocation

The ICAO 24-bit address 781F37 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
CSZ9073 Shenzhen Airlines 13 2026-05-28
CSZ9506 Shenzhen Airlines 10 2026-05-29
CSZ9105 Shenzhen Airlines 9 2026-05-25
CSZ9074 Shenzhen Airlines 9 2026-05-28
CSZ9505 Shenzhen Airlines 8 2026-05-29
CSZ9114 Shenzhen Airlines 8 2026-05-18
CSZ9209 Shenzhen Airlines 7 2026-05-28
CSZ9106 Shenzhen Airlines 7 2026-05-19
CSZ9802 Shenzhen Airlines 6 2026-05-28
CSZ9113 Shenzhen Airlines 6 2026-05-15
CSZ9109 Shenzhen Airlines 6 2026-05-27
CSZ9110 Shenzhen Airlines 5 2026-05-27
CSZ9801 Shenzhen Airlines 4 2026-05-27
CSZ9102 Shenzhen Airlines 4 2026-05-21
CSZ9101 Shenzhen Airlines 4 2026-05-10
CSZ9072 Shenzhen Airlines 4 2026-05-24
CSZ9071 Shenzhen Airlines 4 2026-05-24
CSZ9929 Shenzhen Airlines 3 2026-05-14
CSZ9812 Shenzhen Airlines 3 2026-05-11
CSZ9811 Shenzhen Airlines 3 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSZ9506 PVG → SZX May 29, 10:40 UTCMay 29, 10:55 UTC15m
2026-05-29 CSZ9505 SZX → PVG May 29, 05:35 UTCMay 29, 05:45 UTC10m
2026-05-28 CSZ9209 SZX → XIY May 28, 12:45 UTCMay 28, 12:55 UTC10m
2026-05-28 CSZ9074 TPE → SZX May 28, 10:00 UTCMay 28, 11:10 UTC1h 10m
2026-05-28 CSZ9073 SZX → TPE May 28, 08:00 UTCMay 28, 08:30 UTC30m
2026-05-28 CSZ9073 SZX → TPE May 28, 07:05 UTCMay 28, 07:20 UTC15m
2026-05-28 CSZ9802 PEK → SZX May 28, 05:00 UTCMay 28, 05:15 UTC15m
2026-05-27 CSZ9801 SZX → PEK May 27, 23:40 UTCMay 27, 23:55 UTC15m
2026-05-27 CSZ9110 PEK → SZX May 27, 16:00 UTCMay 27, 16:15 UTC15m
2026-05-27 CSZ9110 PEK → SZX May 27, 13:20 UTCMay 27, 13:40 UTC20m
2026-05-27 CSZ9109 SZX → PEK May 27, 08:35 UTCMay 27, 08:45 UTC10m
2026-05-27 CSZ9403 SZX → CTU May 27, 00:39 UTCMay 27, 00:55 UTC15m
2026-05-26 CSZ9410 CTU → SZX May 26, 15:54 UTCMay 26, 16:05 UTC10m
2026-05-26 CSZ9409 SZX → CTU May 26, 09:55 UTCMay 26, 10:10 UTC15m
2026-05-26 CSZ9804 WUX → SZX May 26, 07:24 UTCMay 26, 08:10 UTC45m
2026-05-25 CSZ9161 PEK → TFU May 25, 13:30 UTCMay 25, 13:40 UTC10m
2026-05-25 CSZ9105 SZX → PEK May 25, 04:50 UTCMay 25, 05:05 UTC15m
2026-05-24 CSZ9109 SZX → PEK May 24, 08:35 UTCMay 24, 08:45 UTC10m
2026-05-24 CSZ9072 TPE → SZX May 24, 06:15 UTCMay 24, 06:30 UTC15m
2026-05-24 CSZ9072 TPE → SZX May 24, 05:05 UTCMay 24, 05:35 UTC30m
2026-05-24 CSZ9071 SZX → TPE May 24, 02:55 UTCMay 24, 03:30 UTC35m
2026-05-24 CSZ9071 SZX → TPE May 24, 02:00 UTCMay 24, 02:10 UTC10m
2026-05-23 CSZ9105 SZX → PEK May 23, 04:50 UTCMay 23, 05:00 UTC10m
2026-05-22 CSZ9209 SZX → XIY May 22, 12:50 UTCMay 22, 13:00 UTC10m
2026-05-22 CSZ9074 TPE → SZX May 22, 09:55 UTCMay 22, 11:15 UTC1h 20m
2026-05-22 CSZ9073 SZX → TPE May 22, 08:05 UTCMay 22, 08:40 UTC35m
2026-05-22 CSZ9073 SZX → TPE May 22, 07:15 UTCMay 22, 07:30 UTC15m
2026-05-22 CSZ9802 PEK → SZX May 22, 05:30 UTCMay 22, 05:50 UTC20m
2026-05-21 CSZ9801 SZX → PEK May 21, 23:50 UTCMay 22, 00:00 UTC10m
2026-05-21 CSZ9947 SZX → WUH May 21, 14:30 UTCMay 21, 14:40 UTC10m
2026-05-21 CSZ9102 PEK → SZX May 21, 12:55 UTCMay 21, 13:05 UTC10m
2026-05-21 CSZ9102 PEK → SZX May 21, 10:05 UTCMay 21, 10:20 UTC15m
2026-05-20 CSZ9109 SZX → PEK May 20, 11:15 UTCMay 20, 11:25 UTC10m
2026-05-20 CSZ9109 SZX → PEK May 20, 08:45 UTCMay 20, 08:55 UTC10m
2026-05-20 CSZ9403 SZX → CTU May 20, 01:05 UTCMay 20, 01:15 UTC10m
2026-05-19 CSZ9106 PEK → SZX May 19, 12:15 UTCMay 19, 12:30 UTC15m
2026-05-19 CSZ9106 PEK → SZX May 19, 09:30 UTCMay 19, 09:50 UTC20m
2026-05-19 CSZ9105 SZX → PEK May 19, 04:50 UTCMay 19, 05:05 UTC15m
2026-05-18 CSZ9114 PEK → SZX May 18, 23:50 UTCMay 19, 00:10 UTC20m
2026-05-18 CSZ9074 TPE → SZX May 18, 10:50 UTCMay 18, 11:10 UTC20m
2026-05-18 CSZ9074 TPE → SZX May 18, 09:50 UTCMay 18, 10:15 UTC25m
2026-05-18 CSZ9073 SZX → TPE May 18, 08:01 UTCMay 18, 08:25 UTC25m
2026-05-18 CSZ9073 SZX → TPE May 18, 07:10 UTCMay 18, 07:20 UTC10m
2026-05-18 CSZ9802 PEK → SZX May 18, 05:20 UTCMay 18, 05:45 UTC25m
2026-05-17 CSZ9801 SZX → PEK May 17, 23:40 UTCMay 17, 23:50 UTC10m
2026-05-17 CSZ9110 PEK → SZX May 17, 16:05 UTCMay 17, 16:20 UTC15m
2026-05-17 CSZ9110 PEK → SZX May 17, 13:15 UTCMay 17, 13:40 UTC25m
2026-05-17 CSZ9072 TPE → SZX May 17, 06:20 UTCMay 17, 06:35 UTC15m
2026-05-17 CSZ9072 TPE → SZX May 17, 05:20 UTCMay 17, 05:50 UTC30m
2026-05-17 CSZ9071 SZX → TPE May 17, 03:10 UTCMay 17, 03:35 UTC25m

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-32DV page for operator, model, and routing details .

Mode-S 781F37 frequently asked

What is Mode-S code 781F37?
781F37 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32DV.
Where is Mode-S 781F37 registered?
Mode-S code 781F37 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F37 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F37, octal 36017467, decimal 7,872,311.
What flights does 781F37 operate?
Mode-S 781F37 has broadcast 20 distinct callsigns, including CSZ9073, CSZ9506, CSZ9105, CSZ9074, CSZ9505.