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 3h ago
Flights observed
294
Distinct callsigns
20
Country
CN
Last broadcast
3h 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
CSZ9105 - 20 2026-07-13
CSZ9109 - 19 2026-07-07
CSZ9073 - 19 2026-07-12
CSZ9114 - 17 2026-07-13
CSZ9106 - 17 2026-07-13
CSZ9110 - 14 2026-07-02
CSZ9074 - 14 2026-07-12
CSZ9113 - 11 2026-07-12
CSZ9506 Shenzhen Airlines 10 2026-05-29
CSZ9802 - 8 2026-07-10
CSZ9505 Shenzhen Airlines 8 2026-05-29
CSZ9514 - 7 2026-07-11
CSZ9403 - 7 2026-07-07
CSZ9209 Shenzhen Airlines 7 2026-05-28
CSZ9810 Shenzhen Airlines 6 2026-06-17
CSZ9801 - 6 2026-07-10
CSZ9513 - 6 2026-07-11
CSZ9071 Shenzhen Airlines 6 2026-06-21
CSZ9947 Shenzhen Airlines 5 2026-06-10
CSZ9929 Shenzhen Airlines 5 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSZ9881 - Jul 13, 23:30 UTCJul 13, 23:40 UTC10m
2026-07-13 CSZ9313 - Jul 13, 13:45 UTCJul 13, 13:55 UTC10m
2026-07-13 CSZ9106 - Jul 13, 11:50 UTCJul 13, 12:00 UTC10m
2026-07-13 CSZ9106 - Jul 13, 09:10 UTCJul 13, 09:30 UTC20m
2026-07-13 CSZ9105 - Jul 13, 04:40 UTCJul 13, 04:55 UTC15m
2026-07-13 CSZ9114 - Jul 13, 00:20 UTCJul 13, 00:40 UTC20m
2026-07-12 CSZ9113 - Jul 12, 13:01 UTCJul 12, 13:15 UTC15m
2026-07-12 CSZ9074 - Jul 12, 09:50 UTCJul 12, 11:10 UTC1h 20m
2026-07-12 CSZ9073 - Jul 12, 06:45 UTCJul 12, 08:20 UTC1h 35m
2026-07-11 CSZ9922 - Jul 11, 14:00 UTCJul 11, 14:15 UTC15m
2026-07-11 CSZ9921 - Jul 11, 07:40 UTCJul 11, 07:55 UTC15m
2026-07-11 CSZ9514 - Jul 11, 05:50 UTCJul 11, 06:10 UTC20m
2026-07-11 CSZ9513 - Jul 11, 00:50 UTCJul 11, 01:05 UTC15m
2026-07-10 CSZ9530 - Jul 10, 15:20 UTCJul 10, 15:40 UTC20m
2026-07-10 CSZ9529 - Jul 10, 10:25 UTCJul 10, 10:35 UTC10m
2026-07-10 CSZ9802 - Jul 10, 07:50 UTCJul 10, 08:10 UTC20m
2026-07-10 CSZ9801 - Jul 10, 02:40 UTCJul 10, 03:25 UTC45m
2026-07-09 CSZ9106 - Jul 9, 11:35 UTCJul 9, 11:45 UTC10m
2026-07-09 CSZ9105 - Jul 9, 07:40 UTCJul 9, 07:50 UTC10m
2026-07-09 CSZ9105 - Jul 9, 05:05 UTCJul 9, 05:20 UTC15m
2026-07-09 CSZ9114 PEK → SZX Jul 9, 00:25 UTCJul 9, 00:40 UTC15m
2026-07-08 CSZ9113 - Jul 8, 15:55 UTCJul 8, 16:05 UTC10m
2026-07-08 CSZ9106 - Jul 8, 11:45 UTCJul 8, 11:55 UTC10m
2026-07-08 CSZ9105 - Jul 8, 06:10 UTCJul 8, 06:20 UTC10m
2026-07-08 CSZ9114 PEK → SZX Jul 8, 03:40 UTCJul 8, 04:10 UTC30m
2026-07-08 CSZ9114 PEK → SZX Jul 8, 00:30 UTCJul 8, 00:50 UTC20m
2026-07-07 CSZ9109 - Jul 7, 15:10 UTCJul 7, 15:20 UTC10m
2026-07-07 - - Jul 7, 09:55 UTCJul 7, 10:05 UTC10m
2026-07-07 CSZ9403 - Jul 7, 01:15 UTCJul 7, 01:25 UTC10m
2026-07-06 CSZ9106 - Jul 6, 12:00 UTCJul 6, 12:20 UTC20m
2026-07-06 CSZ9105 - Jul 6, 06:40 UTCJul 6, 06:50 UTC10m
2026-07-06 CSZ9114 PEK → SZX Jul 6, 00:25 UTCJul 6, 00:45 UTC20m
2026-07-05 CSZ9109 - Jul 5, 10:45 UTCJul 5, 10:55 UTC10m
2026-07-05 CSZ9884 - Jul 5, 07:30 UTCJul 5, 07:55 UTC25m
2026-07-05 CSZ9883 - Jul 5, 02:00 UTCJul 5, 02:10 UTC10m
2026-07-04 CSZ9106 - Jul 4, 11:10 UTCJul 4, 11:20 UTC10m
2026-07-04 CSZ9105 - Jul 4, 08:45 UTCJul 4, 08:55 UTC10m
2026-07-04 CSZ9105 - Jul 4, 06:15 UTCJul 4, 06:25 UTC10m
2026-07-04 CSZ9114 PEK → SZX Jul 4, 00:25 UTCJul 4, 00:45 UTC20m
2026-07-03 CSZ9113 - Jul 3, 16:40 UTCJul 3, 16:50 UTC10m
2026-07-03 CSZ9074 - Jul 3, 11:20 UTCJul 3, 11:40 UTC20m
2026-07-03 CSZ9074 - Jul 3, 10:20 UTCJul 3, 10:45 UTC25m
2026-07-03 CSZ9073 - Jul 3, 07:30 UTCJul 3, 07:45 UTC15m
2026-07-02 CSZ9110 - Jul 2, 13:30 UTCJul 2, 13:50 UTC20m
2026-07-02 CSZ9109 - Jul 2, 11:10 UTCJul 2, 11:20 UTC10m
2026-07-02 CSZ9109 - Jul 2, 08:35 UTCJul 2, 08:45 UTC10m
2026-07-02 CSZ9944 - Jul 2, 06:20 UTCJul 2, 06:30 UTC10m
2026-07-02 CSZ9943 - Jul 2, 01:35 UTCJul 2, 01:45 UTC10m
2026-07-01 CSZ9409 - Jul 1, 10:15 UTCJul 1, 10:30 UTC15m
2026-07-01 CSZ9884 - Jul 1, 08:40 UTCJul 1, 09:00 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-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 3h 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 CSZ9105, CSZ9109, CSZ9073, CSZ9114, CSZ9106.