Apparatus

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sensors Mode-S transponder

781851

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30CU · AIRBUS A-320neo

Hex
781851
Octal
36014121
Decimal
7,870,545
Country
CN
Tail
B-30CU
Type
A20N
No current signal · last broadcast 6d ago
Flights observed
50
Distinct callsigns
20
Country
CN
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 781851.

Country allocation

The ICAO 24-bit address 781851 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
CSZ8565 - 7 2026-05-17
CSZ9606 Shenzhen Airlines 5 2026-05-29
CSZ9723 - 3 2026-04-25
CSZ9126 Shenzhen Airlines 3 2026-05-29
CSZ9125 Shenzhen Airlines 3 2026-05-29
CSZ9849 Shenzhen Airlines 2 2026-05-27
CSZ9724 - 2 2026-04-25
CSZ9605 Shenzhen Airlines 2 2026-05-28
CSZ9962 - 1 2026-04-17
CSZ9943 Shenzhen Airlines 1 2026-05-30
CSZ9876 Shenzhen Airlines 1 2026-05-03
CSZ9854 Shenzhen Airlines 1 2026-05-19
CSZ9727 Shenzhen Airlines 1 2026-05-24
CSZ9533 Shenzhen Airlines 1 2026-04-15
CSZ9465 Shenzhen Airlines 1 2026-05-22
CSZ9456 Shenzhen Airlines 1 2026-05-20
CSZ9455 Shenzhen Airlines 1 2026-05-20
CSZ9404 Shenzhen Airlines 1 2026-05-23
CSZ9403 Shenzhen Airlines 1 2026-05-23
CSZ9240 Shenzhen Airlines 1 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSZ9943 SZX → HFE May 30, 00:40 UTCMay 30, 00:50 UTC10m
2026-05-29 CSZ9126 TSN → SZX May 29, 15:25 UTCMay 29, 15:35 UTC10m
2026-05-29 CSZ9125 SZX → TSN May 29, 07:05 UTCMay 29, 07:20 UTC15m
2026-05-29 CSZ9606 JDZ → CAN May 29, 05:25 UTCMay 29, 05:45 UTC20m
2026-05-28 CSZ9606 JDZ → CAN May 28, 13:40 UTCMay 29, 03:05 UTC13h 25m
2026-05-28 CSZ9605 CAN → JDZ May 28, 11:20 UTCMay 28, 11:35 UTC15m
2026-05-28 CSZ9240 URC → SZX May 28, 09:10 UTCMay 28, 09:20 UTC10m
2026-05-28 CSZ9239 SZX → URC May 28, 02:10 UTCMay 28, 02:20 UTC10m
2026-05-27 CSZ9849 SZX → NKG May 27, 08:35 UTCMay 27, 08:45 UTC10m
2026-05-26 CSZ9235 SZX → XNN May 26, 23:45 UTCMay 26, 23:54 UTC10m
2026-05-26 CSZ9126 TSN → SZX May 26, 13:34 UTCMay 26, 13:54 UTC20m
2026-05-26 CSZ9125 SZX → TSN May 26, 06:39 UTCMay 26, 06:49 UTC10m
2026-05-26 CSZ9606 JDZ → CAN May 26, 05:05 UTCMay 26, 05:15 UTC10m
2026-05-25 CSZ9606 JDZ → CAN May 25, 13:10 UTCMay 26, 02:39 UTC13h 29m
2026-05-24 CSZ9727 CGO → HAK May 24, 06:45 UTCMay 24, 07:00 UTC15m
2026-05-23 CSZ9605 CAN → JDZ May 23, 11:20 UTCMay 23, 11:30 UTC10m
2026-05-23 CSZ9404 CTU → SZX May 23, 08:20 UTCMay 23, 08:30 UTC10m
2026-05-23 CSZ9403 SZX → CTU May 23, 00:40 UTCMay 23, 00:55 UTC15m
2026-05-22 CSZ9465 SZX → CKG May 22, 09:05 UTCMay 22, 09:15 UTC10m
2026-05-22 CSZ9236 XNN → SZX May 22, 07:20 UTCMay 22, 07:30 UTC10m
2026-05-21 CSZ8984 - May 21, 18:45 UTCMay 21, 18:55 UTC10m
2026-05-21 CSZ8983 - May 21, 12:35 UTCMay 21, 12:55 UTC20m
2026-05-20 CSZ9456 KMG → SZX May 20, 10:20 UTCMay 20, 10:30 UTC10m
2026-05-20 CSZ9455 SZX → KMG May 20, 03:10 UTCMay 20, 03:25 UTC15m
2026-05-19 CSZ9134 TYN → SZX May 19, 13:05 UTCMay 19, 13:15 UTC10m
2026-05-19 CSZ9133 SZX → TYN May 19, 06:45 UTCMay 19, 06:55 UTC10m
2026-05-19 CSZ9854 NKG → SZX May 19, 04:10 UTCMay 19, 04:30 UTC20m
2026-05-17 CSZ8565 - May 17, 02:10 UTCMay 17, 05:50 UTC3h 40m
2026-05-16 CSZ8565 - May 16, 02:05 UTCMay 16, 02:30 UTC25m
2026-05-15 CSZ8565 - May 15, 07:05 UTCMay 16, 02:30 UTC19h 24m
2026-05-15 CSZ8565 - May 15, 04:50 UTCMay 16, 02:30 UTC21h 39m
2026-05-15 CSZ8565 - May 15, 02:15 UTCMay 15, 02:35 UTC20m
2026-05-03 CSZ9876 HAK → SZX May 3, 01:55 UTCMay 3, 02:15 UTC20m
2026-05-02 CSZ8565 - May 2, 02:15 UTCMay 2, 02:40 UTC25m
2026-04-30 CSZ8565 - Apr 30, 02:55 UTCApr 30, 03:15 UTC20m
2026-04-28 CSZ9849 SZX → NKG Apr 28, 08:50 UTCApr 28, 09:05 UTC15m
2026-04-27 CSZ8979 SZX → YNT Apr 27, 23:35 UTCApr 27, 23:55 UTC20m
2026-04-27 CSZ8970 - Apr 27, 15:05 UTCApr 27, 15:55 UTC50m
2026-04-27 CSZ8969 - Apr 27, 11:35 UTCApr 27, 11:45 UTC10m
2026-04-27 CSZ9203 SZX → XIY Apr 27, 02:45 UTCApr 27, 02:55 UTC10m
2026-04-26 CSZ9126 TSN → SZX Apr 26, 13:35 UTCApr 26, 13:50 UTC15m
2026-04-26 CSZ9125 SZX → TSN Apr 26, 06:40 UTCApr 26, 06:55 UTC15m
2026-04-26 CSZ9606 JDZ → CAN Apr 26, 04:55 UTCApr 26, 05:05 UTC10m
2026-04-25 CSZ9724 - Apr 25, 11:05 UTCApr 26, 02:30 UTC15h 25m
2026-04-25 CSZ9723 - Apr 25, 07:05 UTCApr 26, 02:30 UTC19h 25m
2026-04-24 CSZ9724 - Apr 24, 11:35 UTCApr 25, 02:30 UTC14h 55m
2026-04-24 CSZ9723 - Apr 24, 06:50 UTCApr 25, 02:30 UTC19h 40m
2026-04-24 CSZ9723 - Apr 24, 02:40 UTCApr 24, 02:55 UTC15m
2026-04-17 CSZ9962 - Apr 17, 00:25 UTCApr 17, 00:50 UTC25m
2026-04-15 CSZ9533 WUX → ZUH Apr 15, 09:00 UTCApr 15, 09:15 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-30CU page for operator, model, and routing details .

Mode-S 781851 frequently asked

What is Mode-S code 781851?
781851 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30CU.
Where is Mode-S 781851 registered?
Mode-S code 781851 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781851 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781851, octal 36014121, decimal 7,870,545.
What flights does 781851 operate?
Mode-S 781851 has broadcast 20 distinct callsigns, including CSZ8565, CSZ9606, CSZ9723, CSZ9126, CSZ9125.