Apparatus

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sensors Mode-S transponder

781C9C

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-326Q · AIRBUS A-321neo

Hex
781C9C
Octal
36016234
Decimal
7,871,644
Country
CN
Tail
B-326Q
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
96
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781C9C.

Country allocation

The ICAO 24-bit address 781C9C 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
CQH8955 - 9 2026-06-27
CQH8956 Spring Airlines 8 2026-05-29
CQH8882 - 8 2026-06-28
CQH8881 - 8 2026-06-28
CQH8918 - 7 2026-07-16
CQH8776 - 7 2026-07-15
CQH8775 - 7 2026-07-15
CQH8950 Spring Airlines 6 2026-06-05
CQH8917 - 6 2026-07-16
CQH8949 Spring Airlines 4 2026-06-03
CQH6566 - 3 2026-06-24
CQH8816 - 2 2026-06-13
CQH8815 - 2 2026-07-09
CQH6575 - 2 2026-06-23
CQH6223 - 2 2026-05-20
CQH895U - 1 2026-05-21
CQH8929 Spring Airlines 1 2026-04-18
CQH8856 Spring Airlines 1 2026-05-31
CQH8835 Spring Airlines 1 2026-05-03
CQH8756 - 1 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CQH8918 - Jul 16, 02:50 UTCJul 16, 03:00 UTC10m
2026-07-16 CQH8917 - Jul 16, 00:25 UTCJul 16, 00:45 UTC20m
2026-07-15 CQH8776 - Jul 15, 12:40 UTCJul 15, 13:45 UTC1h 5m
2026-07-15 CQH8775 - Jul 15, 09:30 UTCJul 15, 09:50 UTC20m
2026-07-09 CQH8815 - Jul 9, 00:35 UTCJul 9, 00:50 UTC15m
2026-07-07 CQH8776 - Jul 7, 15:20 UTCJul 7, 15:35 UTC15m
2026-07-07 CQH8775 - Jul 7, 11:15 UTCJul 7, 11:30 UTC15m
2026-07-07 CQH8917 - Jul 7, 00:40 UTCJul 7, 01:00 UTC20m
2026-06-28 CQH8882 - Jun 28, 08:34 UTCJun 28, 08:50 UTC15m
2026-06-28 CQH8881 - Jun 28, 04:55 UTCJun 28, 05:15 UTC20m
2026-06-27 CQH8955 - Jun 27, 16:39 UTCJun 27, 17:04 UTC25m
2026-06-27 CQH8955 - Jun 27, 15:05 UTCJun 27, 16:04 UTC1h 0m
2026-06-24 CQH6566 - Jun 24, 06:10 UTCJun 24, 11:09 UTC5h 0m
2026-06-23 CQH8756 - Jun 23, 20:10 UTCJun 24, 04:44 UTC8h 35m
2026-06-23 CQH6582 - Jun 23, 10:35 UTCJun 23, 18:45 UTC8h 10m
2026-06-23 CQH6576 KIX → KIX Jun 23, 03:25 UTCJun 23, 09:20 UTC5h 55m
2026-06-23 CQH6575 - Jun 23, 01:10 UTCJun 23, 02:09 UTC1h 0m
2026-06-21 CQH8918 - Jun 21, 02:15 UTCJun 21, 02:30 UTC15m
2026-06-21 CQH8917 - Jun 21, 00:29 UTCJun 21, 00:40 UTC10m
2026-06-16 CQH8776 - Jun 16, 12:00 UTCJun 16, 12:10 UTC10m
2026-06-16 CQH8775 - Jun 16, 10:09 UTCJun 16, 10:30 UTC20m
2026-06-13 CQH8816 - Jun 13, 02:35 UTCJun 13, 03:10 UTC35m
2026-06-06 CQH8776 SZX → SHA Jun 6, 14:40 UTCJun 6, 14:50 UTC10m
2026-06-06 CQH8775 SHA → SZX Jun 6, 05:40 UTCJun 6, 13:30 UTC7h 50m
2026-06-06 CQH8918 SZX → SHA Jun 6, 04:20 UTCJun 6, 04:35 UTC15m
2026-06-05 CQH8950 SZX → SHA Jun 5, 14:15 UTCJun 5, 14:30 UTC15m
2026-06-03 CQH8950 SZX → SHA Jun 3, 13:30 UTCJun 3, 13:45 UTC15m
2026-06-03 CQH8949 SHA → SZX Jun 3, 11:15 UTCJun 3, 11:50 UTC35m
2026-06-02 CQH6720 CAN → SHA Jun 2, 10:15 UTCJun 2, 10:25 UTC10m
2026-05-31 CQH8856 CAN → SHA May 31, 09:55 UTCMay 31, 10:05 UTC10m
2026-05-30 CQH8950 SZX → SHA May 30, 13:35 UTCMay 30, 13:55 UTC20m
2026-05-30 CQH8882 SZX → SHA May 30, 06:25 UTCMay 30, 06:50 UTC25m
2026-05-30 CQH8881 SHA → SZX May 30, 04:30 UTCMay 30, 04:55 UTC25m
2026-05-29 CQH8956 SZX → SHA May 29, 23:20 UTCMay 29, 23:30 UTC10m
2026-05-29 CQH8955 SHA → SZX May 29, 17:55 UTCMay 29, 18:25 UTC30m
2026-05-26 - - May 26, 04:15 UTCMay 26, 04:24 UTC10m
2026-05-22 CQH8882 SZX → SHA May 22, 06:40 UTCMay 22, 06:55 UTC15m
2026-05-22 CQH8881 SHA → SZX May 22, 04:35 UTCMay 22, 05:30 UTC55m
2026-05-21 CQH8950 SZX → SHA May 21, 15:50 UTCMay 21, 16:05 UTC15m
2026-05-21 CQH8949 SHA → SZX May 21, 13:10 UTCMay 21, 13:30 UTC20m
2026-05-21 CQH8918 SZX → SHA May 21, 06:10 UTCMay 21, 06:20 UTC10m
2026-05-21 CQH895U - May 21, 03:05 UTCMay 21, 04:10 UTC1h 5m
2026-05-20 CQH6223 - May 20, 10:35 UTCMay 20, 10:55 UTC20m
2026-05-19 CQH8776 SZX → SHA May 19, 11:25 UTCMay 19, 11:40 UTC15m
2026-05-19 CQH8775 SHA → SZX May 19, 09:55 UTCMay 19, 10:20 UTC25m
2026-05-18 CQH8881 SHA → SZX May 18, 04:55 UTCMay 18, 05:05 UTC10m
2026-05-17 CQH8956 SZX → SHA May 17, 23:35 UTCMay 17, 23:50 UTC15m
2026-05-17 CQH8955 SHA → SZX May 17, 15:35 UTCMay 17, 15:55 UTC20m
2026-05-17 CQH8816 - May 17, 02:20 UTCMay 17, 02:35 UTC15m
2026-05-16 CQH7682 - May 16, 12:55 UTCMay 16, 13:05 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-326Q page for operator, model, and routing details .

Mode-S 781C9C frequently asked

What is Mode-S code 781C9C?
781C9C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-326Q.
Where is Mode-S 781C9C registered?
Mode-S code 781C9C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C9C broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C9C, octal 36016234, decimal 7,871,644.
What flights does 781C9C operate?
Mode-S 781C9C has broadcast 20 distinct callsigns, including CQH8955, CQH8956, CQH8882, CQH8881, CQH8918.