Apparatus

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sensors Mode-S transponder

781973

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30FP · AIRBUS A-321neo

Hex
781973
Octal
36014563
Decimal
7,870,835
Country
CN
Tail
B-30FP
Type
A21N
No current signal · last broadcast Jul 25, 14:55 UTC
Flights observed
73
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 14:55 UTC

Last known position

Most recent position reported by Mode-S 781973.

Country allocation

The ICAO 24-bit address 781973 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
CSZ9624 - 5 2026-07-04
CSZ9723 - 4 2026-07-16
CSZ9623 - 4 2026-07-06
CSZ9748 - 3 2026-06-29
CSZ9747 - 3 2026-06-29
CSZ9235 - 3 2026-07-05
CSZ9233 Shenzhen Airlines 3 2026-07-21
CSZ9765 - 2 2026-07-04
CSZ9526 - 2 2026-07-10
CSZ9453 Shenzhen Airlines 2 2026-07-22
CSZ9317 Shenzhen Airlines 2 2026-07-21
CSZ9239 - 2 2026-07-01
CSZ9234 Shenzhen Airlines 2 2026-07-21
CSZ9224 Shenzhen Airlines 2 2026-07-24
CSZ9203 Shenzhen Airlines 2 2026-07-23
CSZ9126 - 2 2026-07-05
CSZ9125 - 2 2026-07-05
CSZ9994 Shenzhen Airlines 1 2026-04-23
CSZ9962 - 1 2026-04-18
CSZ9932 - 1 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CSZ9671 CAN → HRB Jul 25, 00:30 UTCJul 25, 14:55 UTC14h 25m
2026-07-24 CSZ9224 XIY → CAN Jul 24, 16:20 UTCJul 24, 16:30 UTC10m
2026-07-23 CSZ9213 SZX → XIY Jul 23, 11:35 UTCJul 23, 11:50 UTC15m
2026-07-23 CSZ9204 - Jul 23, 09:10 UTCJul 23, 09:20 UTC10m
2026-07-23 CSZ9203 SZX → XIY Jul 23, 02:35 UTCJul 23, 02:50 UTC15m
2026-07-22 CSZ9458 KMG → SZX Jul 22, 15:05 UTCJul 22, 15:15 UTC10m
2026-07-22 CSZ9453 SZX → KMG Jul 22, 01:50 UTCJul 22, 02:10 UTC20m
2026-07-21 CSZ9316 HAK → SZX Jul 21, 23:40 UTCJul 22, 00:00 UTC20m
2026-07-21 CSZ9317 SZX → CGO Jul 21, 18:00 UTCJul 21, 18:15 UTC15m
2026-07-21 CSZ9234 XNN → SZX Jul 21, 16:05 UTCJul 21, 16:15 UTC10m
2026-07-21 CSZ9233 SZX → XNN Jul 21, 09:10 UTCJul 21, 09:20 UTC10m
2026-07-20 CSZ9237 - Jul 20, 23:35 UTCJul 20, 23:50 UTC15m
2026-07-20 CSZ8984 - Jul 20, 16:05 UTCJul 20, 16:15 UTC10m
2026-07-20 CSZ8983 - Jul 20, 10:30 UTCJul 20, 10:45 UTC15m
2026-07-20 CSZ9453 SZX → KMG Jul 20, 02:30 UTCJul 20, 02:45 UTC15m
2026-07-19 CSZ9876 HAK → SZX Jul 19, 01:15 UTCJul 19, 01:25 UTC10m
2026-07-18 CSZ9652 - Jul 18, 01:20 UTCJul 18, 01:34 UTC15m
2026-07-16 CSZ9723 - Jul 16, 02:05 UTCJul 16, 11:40 UTC9h 35m
2026-07-15 CSZ9723 - Jul 15, 09:35 UTCJul 16, 02:50 UTC17h 15m
2026-07-15 CSZ9723 - Jul 15, 06:00 UTCJul 16, 02:50 UTC20h 50m
2026-07-15 CSZ9723 - Jul 15, 01:55 UTCJul 15, 10:25 UTC8h 30m
2026-07-14 CSZ9866 - Jul 14, 08:50 UTCJul 14, 09:05 UTC15m
2026-07-11 CSZ9224 - Jul 11, 16:55 UTCJul 11, 17:10 UTC15m
2026-07-10 CSZ9317 - Jul 10, 15:40 UTCJul 10, 15:50 UTC10m
2026-07-10 CSZ9526 - Jul 10, 12:20 UTCJul 10, 13:40 UTC1h 20m
2026-07-09 CSZ9526 - Jul 9, 15:05 UTCJul 10, 13:40 UTC22h 35m
2026-07-08 CSZ8903 - Jul 8, 23:55 UTCJul 9, 15:25 UTC15h 30m
2026-07-08 CSZ9931 - Jul 8, 09:00 UTCJul 8, 09:10 UTC10m
2026-07-08 CSZ9236 - Jul 8, 07:00 UTCJul 8, 07:10 UTC10m
2026-07-07 CSZ9932 - Jul 7, 17:55 UTCJul 7, 18:25 UTC30m
2026-07-06 CSZ9623 - Jul 6, 12:30 UTCJul 7, 02:40 UTC14h 10m
2026-07-06 CSZ9623 - Jul 6, 10:10 UTCJul 6, 10:30 UTC20m
2026-07-05 CSZ9235 - Jul 5, 23:30 UTCJul 5, 23:45 UTC15m
2026-07-05 CSZ9126 - Jul 5, 16:45 UTCJul 5, 17:10 UTC25m
2026-07-05 CSZ9125 - Jul 5, 09:45 UTCJul 5, 09:55 UTC10m
2026-07-04 CSZ9624 - Jul 4, 13:35 UTCJul 5, 05:05 UTC15h 30m
2026-07-04 CSZ9765 - Jul 4, 02:15 UTCJul 4, 13:45 UTC11h 30m
2026-07-03 CSZ9766 - Jul 3, 13:25 UTCJul 4, 02:25 UTC13h 0m
2026-07-03 CSZ9765 - Jul 3, 01:20 UTCJul 3, 13:35 UTC12h 15m
2026-07-02 CSZ9623 - Jul 2, 12:10 UTCJul 3, 01:30 UTC13h 20m
2026-07-02 CSZ9623 - Jul 2, 09:50 UTCJul 2, 10:05 UTC15m
2026-07-01 CSZ9235 - Jul 1, 23:30 UTCJul 1, 23:40 UTC10m
2026-07-01 CSZ9239 - Jul 1, 02:20 UTCJul 1, 02:30 UTC10m
2026-06-30 CSZ9234 - Jun 30, 13:55 UTCJun 30, 14:10 UTC15m
2026-06-30 CSZ9233 - Jun 30, 07:05 UTCJun 30, 07:15 UTC10m
2026-06-30 CSZ9624 - Jun 30, 05:00 UTCJun 30, 05:25 UTC25m
2026-06-30 CSZ9624 - Jun 30, 02:30 UTCJun 30, 02:40 UTC10m
2026-06-29 CSZ9748 - Jun 29, 08:50 UTCJun 29, 13:19 UTC4h 30m
2026-06-29 CSZ9747 - Jun 29, 02:09 UTCJun 29, 02:20 UTC10m
2026-06-28 CSZ9755 - Jun 28, 07:44 UTCJun 28, 07:54 UTC10m

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-30FP page for operator, model, and routing details .

Mode-S 781973 frequently asked

What is Mode-S code 781973?
781973 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30FP.
Where is Mode-S 781973 registered?
Mode-S code 781973 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781973 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 14:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781973, octal 36014563, decimal 7,870,835.
What flights does 781973 operate?
Mode-S 781973 has broadcast 20 distinct callsigns, including CSZ9624, CSZ9723, CSZ9623, CSZ9748, CSZ9747.