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 2d ago
Flights observed
66
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

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
CSZ9728 - 4 2026-07-01
CSZ9727 - 4 2026-07-01
CSZ9723 - 3 2026-04-28
CSZ9711 - 3 2026-07-04
CSZ8903 Shenzhen Airlines 3 2026-06-13
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
CSZ9943 Shenzhen Airlines 1 2026-04-15
CSZ9843 Shenzhen Airlines 1 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-05-22 CSZ8945 - May 22, 10:20 UTCMay 22, 10:30 UTC10m
2026-05-13 CSZ9982 HGH → CAN May 13, 14:40 UTCMay 13, 15:20 UTC40m
2026-05-10 CSZ8946 - May 10, 16:30 UTCMay 10, 16:40 UTC10m
2026-05-10 - - May 10, 08:15 UTCMay 10, 08:25 UTC10m
2026-05-08 CSZ8903 CAN → CGO May 8, 00:09 UTCMay 8, 00:29 UTC20m
2026-05-02 CSZ9728 CGO → SHE May 2, 13:35 UTCMay 3, 04:10 UTC14h 35m
2026-05-01 CSZ9728 CGO → SHE May 1, 13:50 UTCMay 2, 13:45 UTC23h 56m
2026-05-01 CSZ9727 CGO → HAK May 1, 06:30 UTCMay 1, 13:50 UTC7h 20m
2026-04-30 CSZ9728 CGO → SHE Apr 30, 13:55 UTCMay 1, 13:45 UTC23h 50m
2026-04-30 CSZ9727 CGO → HAK Apr 30, 06:30 UTCApr 30, 14:00 UTC7h 30m
2026-04-29 CSZ9727 CGO → HAK Apr 29, 12:55 UTCApr 30, 06:45 UTC17h 49m
2026-04-29 CSZ9711 SHE → HFE Apr 29, 01:50 UTCApr 29, 12:55 UTC11h 6m
2026-04-28 CSZ9723 - Apr 28, 07:50 UTCApr 29, 01:54 UTC18h 5m
2026-04-28 CSZ9723 - Apr 28, 06:45 UTCApr 29, 01:54 UTC19h 10m
2026-04-28 CSZ9723 - Apr 28, 02:05 UTCApr 28, 07:55 UTC5h 50m
2026-04-27 CSZ9711 SHE → HFE Apr 27, 02:05 UTCApr 27, 02:15 UTC10m
2026-04-26 CSZ9302 CGO → SZX Apr 26, 05:30 UTCApr 26, 06:00 UTC30m
2026-04-26 CSZ9301 SZX → CGO Apr 26, 00:05 UTCApr 26, 00:20 UTC15m

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 2d ago.
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, CSZ9728, CSZ9727, CSZ9723.