Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 16h ago
Flights observed
108
Distinct callsigns
20
Country
CN
Last broadcast
16h 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
CSZ9723 - 8 2026-06-21
CSZ8565 - 7 2026-05-17
CSZ9235 Shenzhen Airlines 6 2026-07-17
CSZ9606 Shenzhen Airlines 5 2026-05-29
CSZ9236 - 5 2026-07-13
CSZ9125 - 5 2026-07-15
CSZ9711 - 4 2026-06-29
CSZ9623 Shenzhen Airlines 4 2026-07-18
CSZ9239 - 4 2026-07-17
CSZ9126 - 4 2026-07-15
CSZ9712 - 3 2026-06-27
CSZ9605 - 3 2026-06-19
CSZ8903 - 3 2026-07-02
CSZ9849 Shenzhen Airlines 2 2026-05-27
CSZ9748 - 2 2026-07-19
CSZ9727 - 2 2026-06-22
CSZ9724 - 2 2026-04-25
CSZ9652 - 2 2026-07-10
CSZ9533 - 2 2026-07-06
CSZ9465 - 2 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 CSZ9748 - Jul 19, 06:15 UTCJul 19, 13:10 UTC6h 55m
2026-07-18 CSZ9623 SZX → HRB Jul 18, 12:20 UTCJul 19, 06:25 UTC18h 5m
2026-07-18 CSZ9623 SZX → HRB Jul 18, 10:00 UTCJul 18, 10:10 UTC10m
2026-07-17 CSZ9235 SZX → XNN Jul 17, 23:20 UTCJul 17, 23:35 UTC15m
2026-07-17 CSZ8995 - Jul 17, 12:35 UTCJul 17, 12:50 UTC15m
2026-07-17 CSZ9239 - Jul 17, 02:39 UTCJul 17, 02:54 UTC15m
2026-07-16 CSZ9306 - Jul 16, 21:45 UTCJul 16, 22:05 UTC20m
2026-07-16 CSZ9305 - Jul 16, 10:15 UTCJul 16, 10:35 UTC20m
2026-07-15 CSZ9235 - Jul 15, 23:25 UTCJul 15, 23:35 UTC10m
2026-07-15 CSZ9126 - Jul 15, 15:25 UTCJul 15, 16:00 UTC35m
2026-07-15 CSZ9125 - Jul 15, 08:20 UTCJul 15, 08:30 UTC10m
2026-07-14 CSZ9748 - Jul 14, 09:05 UTCJul 15, 02:45 UTC17h 39m
2026-07-13 CSZ9623 - Jul 13, 12:20 UTCJul 14, 09:20 UTC21h 0m
2026-07-13 CSZ9623 - Jul 13, 09:45 UTCJul 13, 10:05 UTC20m
2026-07-13 CSZ9236 - Jul 13, 06:40 UTCJul 13, 06:50 UTC10m
2026-07-12 CSZ9235 - Jul 12, 23:25 UTCJul 12, 23:35 UTC10m
2026-07-12 CSZ9240 - Jul 12, 09:25 UTCJul 12, 09:40 UTC15m
2026-07-12 CSZ9239 - Jul 12, 02:20 UTCJul 12, 02:30 UTC10m
2026-07-10 CSZ9652 - Jul 10, 03:50 UTCJul 10, 04:00 UTC10m
2026-07-06 CSZ9533 - Jul 6, 12:10 UTCJul 6, 12:20 UTC10m
2026-07-02 CSZ8903 - Jul 2, 00:30 UTCJul 2, 04:45 UTC4h 15m
2026-06-30 CSZ9652 - Jun 30, 01:25 UTCJun 30, 01:35 UTC11m
2026-06-29 CSZ9711 - Jun 29, 02:00 UTCJun 29, 13:24 UTC11h 25m
2026-06-28 CSZ9728 - Jun 28, 07:09 UTCJun 29, 02:05 UTC18h 55m
2026-06-27 CSZ9712 - Jun 27, 14:20 UTCJun 28, 14:14 UTC23h 55m
2026-06-27 CSZ9712 - Jun 27, 14:14 UTCJun 28, 07:14 UTC17h 0m
2026-06-27 CSZ9711 - Jun 27, 02:04 UTCJun 27, 14:29 UTC12h 25m
2026-06-26 CSZ9712 - Jun 26, 12:59 UTCJun 27, 02:14 UTC13h 15m
2026-06-26 CSZ9711 - Jun 26, 01:50 UTCJun 26, 13:10 UTC11h 20m
2026-06-25 CSZ9711 - Jun 25, 15:50 UTCJun 26, 13:10 UTC21h 20m
2026-06-25 CSZ9239 - Jun 25, 02:30 UTCJun 25, 02:39 UTC10m
2026-06-24 CSZ9466 - Jun 24, 15:05 UTCJun 24, 15:14 UTC10m
2026-06-24 CSZ9465 - Jun 24, 09:09 UTCJun 24, 09:24 UTC15m
2026-06-23 CSZ9235 - Jun 23, 23:29 UTCJun 23, 23:44 UTC15m
2026-06-23 CSZ9125 - Jun 23, 06:55 UTCJun 23, 07:09 UTC15m
2026-06-22 CSZ9727 - Jun 22, 06:35 UTCJun 23, 02:34 UTC20h 0m
2026-06-21 CSZ9723 - Jun 21, 01:49 UTCJun 21, 10:25 UTC8h 35m
2026-06-20 CSZ9723 - Jun 20, 10:04 UTCJun 21, 06:44 UTC20h 40m
2026-06-20 CSZ9723 - Jun 20, 06:19 UTCJun 21, 02:15 UTC19h 55m
2026-06-20 CSZ9723 - Jun 20, 02:29 UTCJun 20, 10:09 UTC7h 40m
2026-06-19 CSZ9723 - Jun 19, 13:50 UTCJun 20, 10:09 UTC20h 20m
2026-06-19 CSZ9605 - Jun 19, 11:34 UTCJun 19, 11:45 UTC10m
2026-06-19 CSZ9236 - Jun 19, 07:45 UTCJun 19, 07:54 UTC10m
2026-06-19 CSZ9236 - Jun 19, 06:49 UTCJun 19, 07:04 UTC15m
2026-06-18 CSZ9394 SHE → CGO Jun 18, 19:40 UTCJun 18, 20:00 UTC20m
2026-06-18 CSZ9393 CGO → SHE Jun 18, 13:15 UTCJun 18, 13:30 UTC15m
2026-06-18 CSZ9236 - Jun 18, 10:20 UTCJun 18, 10:30 UTC10m
2026-06-17 CSZ9235 - Jun 17, 23:35 UTCJun 17, 23:50 UTC15m
2026-06-17 CSZ8984 - Jun 17, 15:35 UTCJun 17, 15:46 UTC10m
2026-06-17 CSZ8983 - Jun 17, 09:25 UTCJun 17, 14:40 UTC5h 15m

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 16h 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 CSZ9723, CSZ8565, CSZ9235, CSZ9606, CSZ9236.