Apparatus

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sensors Mode-S transponder

781C2A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-325F · AIRBUS A-321neo

Hex
781C2A
Octal
36016052
Decimal
7,871,530
Country
CN
Tail
B-325F
Type
A21N
No current signal · last broadcast 3h ago
Flights observed
82
Distinct callsigns
15
Country
CN
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 781C2A.

Country allocation

The ICAO 24-bit address 781C2A 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 15 distinct

Callsign Airline Flights Last seen
CSC3961 Sichuan Airlines 21 2026-06-02
CSC3962 Sichuan Airlines 13 2026-06-05
CSC3909 Sichuan Airlines 12 2026-05-31
CSC3923 Sichuan Airlines 8 2026-06-04
CSC3910 Sichuan Airlines 7 2026-06-01
CSC3924 Sichuan Airlines 5 2026-06-02
CSC3995 Sichuan Airlines 3 2026-05-01
CSC6788 Sichuan Airlines 2 2026-04-30
CSC3996 Sichuan Airlines 2 2026-05-01
CSC3993 Sichuan Airlines 2 2026-05-07
CSC3122 Sichuan Airlines 2 2026-05-28
CSC3121 Sichuan Airlines 2 2026-05-28
CSC3994 Sichuan Airlines 1 2026-05-07
CSC3986 - 1 2026-05-27
CSC3985 Sichuan Airlines 1 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-07 CSC3985 TFU → DPS Jun 7, 08:55 UTCJun 7, 09:35 UTC40m
2026-06-05 CSC3962 NRT → TFU Jun 5, 08:00 UTCJun 5, 09:35 UTC1h 35m
2026-06-04 CSC3923 TFU → MLE Jun 4, 10:35 UTCJun 5, 05:25 UTC18h 50m
2026-06-03 CSC3923 TFU → MLE Jun 3, 14:35 UTCJun 4, 13:55 UTC23h 20m
2026-06-03 CSC3962 NRT → TFU Jun 3, 13:30 UTCJun 4, 12:10 UTC22h 40m
2026-06-02 CSC3961 TFU → NRT Jun 2, 16:35 UTCJun 3, 11:35 UTC19h 0m
2026-06-02 CSC3924 MLE → TFU Jun 2, 16:10 UTCJun 3, 11:35 UTC19h 25m
2026-06-02 CSC3924 MLE → TFU Jun 2, 12:40 UTCJun 3, 11:35 UTC22h 55m
2026-06-02 CSC3923 TFU → MLE Jun 2, 10:35 UTCJun 3, 10:30 UTC23h 55m
2026-06-02 CSC3923 TFU → MLE Jun 2, 10:25 UTCJun 2, 19:45 UTC9h 20m
2026-06-01 CSC3910 SIN → TFU Jun 1, 10:35 UTCJun 2, 10:30 UTC23h 55m
2026-06-01 CSC3910 SIN → TFU Jun 1, 09:05 UTCJun 1, 11:35 UTC2h 30m
2026-05-31 CSC3909 TFU → SIN May 31, 19:50 UTCJun 1, 07:00 UTC11h 10m
2026-05-31 CSC3909 TFU → SIN May 31, 09:10 UTCJun 1, 07:00 UTC21h 50m
2026-05-30 CSC3924 MLE → TFU May 30, 16:25 UTCMay 31, 09:50 UTC17h 25m
2026-05-30 CSC3924 MLE → TFU May 30, 13:00 UTCMay 31, 09:50 UTC20h 50m
2026-05-30 CSC3924 MLE → TFU May 30, 10:35 UTCMay 31, 09:50 UTC23h 15m
2026-05-30 CSC3923 TFU → MLE May 30, 10:20 UTCMay 30, 19:55 UTC9h 35m
2026-05-28 CSC3121 PEK → URC May 28, 13:05 UTCMay 28, 13:25 UTC20m
2026-05-28 CSC3122 URC → PEK May 28, 11:00 UTCMay 28, 11:20 UTC20m
2026-05-27 CSC3986 - May 27, 19:40 UTCMay 27, 20:15 UTC35m
2026-05-26 CSC3121 PEK → URC May 26, 13:24 UTCMay 26, 13:40 UTC15m
2026-05-26 CSC3122 URC → PEK May 26, 10:54 UTCMay 26, 11:09 UTC15m
2026-05-25 CSC3910 SIN → TFU May 25, 09:25 UTCMay 25, 11:45 UTC2h 20m
2026-05-24 CSC3910 SIN → TFU May 24, 13:40 UTCMay 25, 06:45 UTC17h 5m
2026-05-24 CSC3909 TFU → SIN May 24, 04:35 UTCMay 24, 12:00 UTC7h 25m
2026-05-23 CSC3909 TFU → SIN May 23, 08:35 UTCMay 24, 08:25 UTC23h 50m
2026-05-23 CSC3962 NRT → TFU May 23, 07:55 UTCMay 24, 05:45 UTC21h 51m
2026-05-23 CSC3961 TFU → NRT May 23, 04:30 UTCMay 23, 05:50 UTC1h 20m
2026-05-20 CSC3962 NRT → TFU May 20, 08:05 UTCMay 20, 10:15 UTC2h 10m
2026-05-20 CSC3961 TFU → NRT May 20, 04:20 UTCMay 20, 05:50 UTC1h 31m
2026-05-19 CSC3961 TFU → NRT May 19, 08:35 UTCMay 20, 05:50 UTC21h 16m
2026-05-19 CSC3961 TFU → NRT May 19, 08:00 UTCMay 20, 05:50 UTC21h 51m
2026-05-19 CSC3961 TFU → NRT May 19, 04:25 UTCMay 19, 06:05 UTC1h 40m
2026-05-15 CSC3910 SIN → TFU May 15, 09:10 UTCMay 15, 11:40 UTC2h 30m
2026-05-15 CSC3909 TFU → SIN May 15, 04:30 UTCMay 15, 07:00 UTC2h 30m
2026-05-13 CSC3962 NRT → TFU May 13, 08:05 UTCMay 13, 10:05 UTC2h 0m
2026-05-12 CSC3961 TFU → NRT May 12, 10:35 UTCMay 13, 06:00 UTC19h 25m
2026-05-12 CSC3962 NRT → TFU May 12, 08:40 UTCMay 13, 06:00 UTC21h 20m
2026-05-11 CSC3961 TFU → NRT May 11, 10:35 UTCMay 12, 05:50 UTC19h 16m
2026-05-11 CSC3961 TFU → NRT May 11, 09:20 UTCMay 12, 05:50 UTC20h 30m
2026-05-11 CSC3909 TFU → SIN May 11, 04:35 UTCMay 11, 07:15 UTC2h 40m
2026-05-09 CSC3923 TFU → MLE May 9, 10:20 UTCMay 9, 20:05 UTC9h 45m
2026-05-08 CSC3962 NRT → TFU May 8, 08:05 UTCMay 8, 10:29 UTC2h 25m
2026-05-07 CSC3961 TFU → NRT May 7, 17:30 UTCMay 8, 05:44 UTC12h 15m
2026-05-07 CSC3994 KUL → TFU May 7, 16:25 UTCMay 7, 16:40 UTC15m
2026-05-07 CSC3993 TFU → KUL May 7, 14:25 UTCMay 7, 14:45 UTC20m
2026-05-07 CSC3993 TFU → KUL May 7, 12:10 UTCMay 7, 13:25 UTC1h 15m
2026-05-06 CSC3962 NRT → TFU May 6, 07:50 UTCMay 6, 09:55 UTC2h 5m
2026-05-06 CSC3961 TFU → NRT May 6, 04:20 UTCMay 6, 05:45 UTC1h 25m

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-325F page for operator, model, and routing details .

Mode-S 781C2A frequently asked

What is Mode-S code 781C2A?
781C2A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-325F.
Where is Mode-S 781C2A registered?
Mode-S code 781C2A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C2A broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C2A, octal 36016052, decimal 7,871,530.
What flights does 781C2A operate?
Mode-S 781C2A has broadcast 15 distinct callsigns, including CSC3961, CSC3962, CSC3909, CSC3923, CSC3910.