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 8h ago
Flights observed
52
Distinct callsigns
20
Country
CN
Last broadcast
8h ago

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
CSZ9623 - 4 2026-07-06
CSZ9748 - 3 2026-06-29
CSZ9747 - 3 2026-06-29
CSZ9235 - 3 2026-07-05
CSZ9765 - 2 2026-07-04
CSZ9526 - 2 2026-07-10
CSZ9239 - 2 2026-07-01
CSZ9233 - 2 2026-06-30
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
CSZ9931 - 1 2026-07-08
CSZ9867 Shenzhen Airlines 1 2026-04-13
CSZ9866 - 1 2026-07-14
CSZ9766 - 1 2026-07-03
CSZ9755 - 1 2026-06-28
CSZ9686 - 1 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-27 CSZ9748 - Jun 27, 06:09 UTCJun 27, 14:45 UTC8h 35m
2026-06-27 CSZ9747 - Jun 27, 01:35 UTCJun 27, 01:44 UTC10m
2026-06-26 CSZ9748 - Jun 26, 08:45 UTCJun 26, 13:15 UTC4h 30m
2026-06-26 CSZ9747 - Jun 26, 06:04 UTCJun 26, 06:29 UTC25m
2026-06-16 CSZ9203 - Jun 16, 03:15 UTCJun 16, 03:30 UTC15m
2026-06-15 CSZ9302 CGO → SZX Jun 15, 10:24 UTCJun 15, 10:35 UTC10m
2026-06-15 CSZ9301 - Jun 15, 00:05 UTCJun 15, 00:20 UTC15m
2026-06-14 CSZ9468 CKG → SZX Jun 14, 17:05 UTCJun 14, 17:15 UTC10m
2026-06-14 CSZ9240 URC → SZX Jun 14, 09:40 UTCJun 14, 09:50 UTC10m
2026-06-14 CSZ9239 - Jun 14, 02:25 UTCJun 14, 02:45 UTC20m
2026-06-13 CSZ9126 TSN → SZX Jun 13, 19:15 UTCJun 13, 19:35 UTC20m
2026-06-13 CSZ9125 - Jun 13, 09:15 UTCJun 13, 09:35 UTC20m
2026-06-12 CSZ9235 SZX → XNN Jun 12, 23:50 UTCJun 13, 00:05 UTC15m
2026-06-12 CSZ9233 SZX → XNN Jun 12, 09:15 UTCJun 12, 09:25 UTC10m
2026-06-12 CSZ9624 - Jun 12, 05:55 UTCJun 12, 06:15 UTC20m
2026-06-12 CSZ9624 - Jun 12, 03:20 UTCJun 12, 03:40 UTC20m
2026-04-28 - - Apr 28, 12:25 UTCApr 28, 12:35 UTC10m
2026-04-27 CSZ8565 - Apr 27, 02:10 UTCApr 27, 02:35 UTC25m
2026-04-23 CSZ9994 TAO → CAN Apr 23, 08:05 UTCApr 23, 08:15 UTC10m
2026-04-18 CSZ9686 - Apr 18, 13:25 UTCApr 18, 13:40 UTC15m
2026-04-18 CSZ9962 - Apr 18, 00:00 UTCApr 18, 00:25 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-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 8h ago.
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, CSZ9623, CSZ9748, CSZ9747, CSZ9235.