Apparatus

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sensors Mode-S transponder

781C77

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-326F · AIRBUS A-320neo

Hex
781C77
Octal
36016167
Decimal
7,871,607
Country
CN
Tail
B-326F
Type
A20N
No current signal · last broadcast Jul 24, 17:30 UTC
Flights observed
84
Distinct callsigns
20
Country
CN
Last broadcast
Jul 24, 17:30 UTC

Last known position

Most recent position reported by Mode-S 781C77.

Country allocation

The ICAO 24-bit address 781C77 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
CSZ9748 - 8 2026-06-20
CSZ9747 - 6 2026-06-20
CSZ9672 Shenzhen Airlines 5 2026-07-24
CSZ9728 - 4 2026-07-01
CSZ9727 - 4 2026-07-01
CSZ8903 Shenzhen Airlines 4 2026-07-24
CSZ9723 - 3 2026-04-28
CSZ9711 - 3 2026-07-04
CSZ9944 Shenzhen Airlines 2 2026-04-16
CSZ9848 Shenzhen Airlines 2 2026-04-15
CSZ9847 Shenzhen Airlines 2 2026-04-15
CSZ9234 - 2 2026-04-16
CSZ9233 Shenzhen Airlines 2 2026-04-16
CSZ8309 - 2 2026-07-10
CSZ9994 - 1 2026-06-11
CSZ9982 Shenzhen Airlines 1 2026-05-13
CSZ9974 Shenzhen Airlines 1 2026-06-08
CSZ9973 Shenzhen Airlines 1 2026-05-23
CSZ9966 - 1 2026-06-06
CSZ9963 Shenzhen Airlines 1 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CSZ9672 HRB → CAN Jul 24, 17:20 UTCJul 24, 17:30 UTC10m
2026-07-24 CSZ9672 HRB → CAN Jul 24, 11:00 UTCJul 24, 15:20 UTC4h 20m
2026-07-24 CSZ9671 CAN → HRB Jul 24, 08:20 UTCJul 24, 08:30 UTC10m
2026-07-24 CSZ8903 CAN → CGO Jul 24, 01:00 UTCJul 24, 01:45 UTC45m
2026-07-23 CSZ9672 HRB → CAN Jul 23, 17:10 UTCJul 23, 17:20 UTC10m
2026-07-23 CSZ9672 HRB → CAN Jul 23, 09:25 UTCJul 23, 14:35 UTC5h 10m
2026-07-22 CSZ9963 SZX → HGH Jul 22, 03:20 UTCJul 22, 03:55 UTC35m
2026-07-21 CSZ9415 SZX → CTU Jul 21, 15:05 UTCJul 21, 15:15 UTC10m
2026-07-21 CSZ9122 HET → SZX Jul 21, 13:45 UTCJul 21, 13:55 UTC10m
2026-07-21 CSZ9121 - Jul 21, 00:00 UTCJul 21, 00:15 UTC15m
2026-07-20 CSZ8995 CAN → HAK Jul 20, 11:00 UTCJul 20, 11:15 UTC15m
2026-07-20 CSZ9203 SZX → XIY Jul 20, 02:40 UTCJul 20, 02:55 UTC15m
2026-07-19 CSZ9316 HAK → SZX Jul 19, 23:40 UTCJul 19, 23:55 UTC15m
2026-07-19 CSZ8993 CAN → HAK Jul 19, 14:10 UTCJul 19, 14:20 UTC10m
2026-07-19 CSZ9713 SHE → HFE Jul 19, 04:40 UTCJul 19, 08:20 UTC3h 40m
2026-07-17 CSZ9195 - Jul 17, 01:05 UTCJul 17, 01:29 UTC25m
2026-07-16 CSZ9196 - Jul 16, 15:40 UTCJul 16, 16:05 UTC25m
2026-07-15 CSZ8423 - Jul 15, 06:25 UTCJul 15, 10:50 UTC4h 25m
2026-07-11 CSZ8594 - Jul 11, 07:50 UTCJul 11, 08:05 UTC15m
2026-07-10 CSZ8310 - Jul 10, 13:50 UTCJul 11, 00:50 UTC11h 1m
2026-07-10 CSZ8309 - Jul 10, 09:35 UTCJul 10, 09:45 UTC10m
2026-07-08 CSZ830Q - Jul 8, 06:55 UTCJul 8, 10:40 UTC3h 45m
2026-07-06 CSZ9652 - Jul 6, 01:20 UTCJul 6, 01:35 UTC15m
2026-07-04 CSZ9711 - Jul 4, 03:45 UTCJul 4, 14:05 UTC10h 20m
2026-07-03 CSZ8309 - Jul 3, 11:25 UTCJul 3, 11:35 UTC10m
2026-07-01 CSZ9728 - Jul 1, 13:35 UTCJul 2, 01:35 UTC12h 0m
2026-07-01 CSZ9727 - Jul 1, 06:30 UTCJul 1, 06:45 UTC15m
2026-06-29 CSZ9651 - Jun 29, 13:39 UTCJun 29, 13:49 UTC10m
2026-06-23 CSZ9672 - Jun 23, 09:49 UTCJun 23, 14:19 UTC4h 30m
2026-06-20 CSZ9748 - Jun 20, 09:14 UTCJun 20, 13:19 UTC4h 5m
2026-06-20 CSZ9747 - Jun 20, 06:19 UTCJun 20, 06:39 UTC20m
2026-06-20 CSZ9747 - Jun 20, 01:34 UTCJun 20, 01:44 UTC10m
2026-06-19 CSZ9748 - Jun 19, 17:24 UTCJun 19, 17:34 UTC10m
2026-06-13 CSZ8903 CAN → CGO Jun 13, 00:00 UTCJun 13, 00:55 UTC55m
2026-06-11 CSZ9994 - Jun 11, 06:15 UTCJun 11, 06:30 UTC15m
2026-06-10 CSZ8991 CAN → HAK Jun 10, 09:00 UTCJun 10, 09:10 UTC10m
2026-06-09 CSZ8903 CAN → CGO Jun 9, 00:05 UTCJun 9, 00:20 UTC15m
2026-06-08 CSZ9974 CTU → SZX Jun 8, 17:25 UTCJun 8, 17:35 UTC10m
2026-06-06 CSZ9966 - Jun 6, 12:35 UTCJun 6, 13:15 UTC40m
2026-05-30 CSZ9748 YCU → HRB May 30, 06:30 UTCMay 30, 13:25 UTC6h 55m
2026-05-29 CSZ9748 YCU → HRB May 29, 13:10 UTCMay 30, 09:10 UTC20h 0m
2026-05-29 CSZ9748 YCU → HRB May 29, 09:10 UTCMay 30, 06:45 UTC21h 35m
2026-05-28 CSZ9747 YCU → SYX May 28, 06:15 UTCMay 28, 13:15 UTC7h 0m
2026-05-28 CSZ9747 YCU → SYX May 28, 01:30 UTCMay 28, 01:45 UTC15m
2026-05-27 CSZ9748 YCU → HRB May 27, 13:05 UTCMay 27, 13:25 UTC20m
2026-05-27 CSZ9747 YCU → SYX May 27, 01:39 UTCMay 27, 01:54 UTC15m
2026-05-26 CSZ9748 YCU → HRB May 26, 13:00 UTCMay 26, 13:19 UTC20m
2026-05-26 CSZ9747 YCU → SYX May 26, 01:34 UTCMay 26, 01:49 UTC15m
2026-05-25 CSZ9748 YCU → HRB May 25, 13:20 UTCMay 25, 13:35 UTC15m
2026-05-23 CSZ9973 SZX → CTU May 23, 08:55 UTCMay 23, 09:05 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-326F page for operator, model, and routing details .

Mode-S 781C77 frequently asked

What is Mode-S code 781C77?
781C77 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-326F.
Where is Mode-S 781C77 registered?
Mode-S code 781C77 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C77 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 17:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C77, octal 36016167, decimal 7,871,607.
What flights does 781C77 operate?
Mode-S 781C77 has broadcast 20 distinct callsigns, including CSZ9748, CSZ9747, CSZ9672, CSZ9728, CSZ9727.