Apparatus

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sensors Mode-S transponder

781C2D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-325J · AIRBUS A-350-900

Hex
781C2D
Octal
36016055
Decimal
7,871,533
Country
CN
Tail
B-325J
Type
A359
No current signal · last broadcast Jul 26, 14:10 UTC
Flights observed
178
Distinct callsigns
15
Country
CN
Last broadcast
Jul 26, 14:10 UTC

Last known position

Most recent position reported by Mode-S 781C2D.

Country allocation

The ICAO 24-bit address 781C2D 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
CSC3887 Sichuan Airlines 39 2026-07-24
CSC3815 - 18 2026-06-24
CSC3838 - 17 2026-07-13
CSC3837 - 17 2026-07-12
CSC3804 Sichuan Airlines 15 2026-07-26
CSC3803 Sichuan Airlines 14 2026-07-25
CSC3896 Sichuan Airlines 12 2026-07-23
CSC3895 Sichuan Airlines 9 2026-07-22
CSC3860 Sichuan Airlines 9 2026-07-21
CSC3816 Sichuan Airlines 9 2026-06-25
CSC3888 - 7 2026-07-15
CSC3859 Sichuan Airlines 6 2026-07-20
CSC8894 Sichuan Airlines 4 2026-07-22
CSC8891 - 1 2026-07-20
CSC6871 Sichuan Airlines 1 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSC3804 MAD → TFU Jul 26, 09:35 UTCJul 26, 14:10 UTC4h 35m
2026-07-25 CSC3803 TFU → MAD Jul 25, 21:30 UTCJul 26, 05:55 UTC8h 25m
2026-07-24 CSC3887 TFU → SVO Jul 24, 13:10 UTCJul 24, 13:30 UTC20m
2026-07-23 CSC3887 TFU → SVO Jul 23, 18:10 UTCJul 24, 13:30 UTC19h 20m
2026-07-23 CSC3896 FCO → TFU Jul 23, 15:20 UTCJul 24, 13:30 UTC22h 10m
2026-07-23 CSC3896 FCO → TFU Jul 23, 13:20 UTCJul 24, 13:15 UTC23h 55m
2026-07-23 CSC3896 FCO → TFU Jul 23, 12:20 UTCJul 23, 18:20 UTC6h 0m
2026-07-22 CSC3895 TFU → FCO Jul 22, 12:45 UTCJul 23, 05:00 UTC16h 15m
2026-07-22 CSC8894 PEK → CTU Jul 22, 04:05 UTCJul 22, 04:25 UTC20m
2026-07-21 CSC3860 YVR → TFU Jul 21, 07:55 UTCJul 21, 17:55 UTC10h 0m
2026-07-20 CSC3859 TFU → YVR Jul 20, 12:55 UTCJul 21, 05:15 UTC16h 20m
2026-07-20 CSC8891 - Jul 20, 10:10 UTCJul 20, 10:30 UTC20m
2026-07-20 CSC8894 PEK → CTU Jul 20, 03:55 UTCJul 20, 04:20 UTC25m
2026-07-19 CSC3896 - Jul 19, 11:35 UTCJul 19, 14:50 UTC3h 15m
2026-07-18 CSC3895 - Jul 18, 12:30 UTCJul 19, 05:25 UTC16h 55m
2026-07-18 CSC8894 PEK → CTU Jul 18, 04:10 UTCJul 18, 04:20 UTC10m
2026-07-18 CSC6871 TFU → PEK Jul 18, 02:25 UTCJul 18, 02:40 UTC15m
2026-07-17 CSC3804 - Jul 17, 09:45 UTCJul 17, 14:30 UTC4h 45m
2026-07-16 CSC3803 TFU → MAD Jul 16, 21:35 UTCJul 17, 05:39 UTC8h 5m
2026-07-15 CSC3803 - Jul 15, 23:20 UTCJul 16, 22:00 UTC22h 40m
2026-07-15 CSC3888 - Jul 15, 23:00 UTCJul 15, 23:20 UTC20m
2026-07-15 CSC3887 - Jul 15, 12:40 UTCJul 15, 15:40 UTC3h 0m
2026-07-13 CSC3838 - Jul 13, 17:55 UTCJul 14, 13:15 UTC19h 20m
2026-07-13 CSC3838 - Jul 13, 13:20 UTCJul 14, 13:15 UTC23h 55m
2026-07-13 CSC3838 - Jul 13, 07:55 UTCJul 13, 19:55 UTC12h 0m
2026-07-12 CSC3837 - Jul 12, 18:01 UTCJul 13, 05:01 UTC11h 0m
2026-07-11 CSC3837 - Jul 11, 23:30 UTCJul 12, 20:01 UTC20h 30m
2026-07-11 CSC3888 SVO → SVO Jul 11, 20:15 UTCJul 11, 20:30 UTC15m
2026-07-11 CSC3887 - Jul 11, 13:05 UTCJul 11, 13:30 UTC25m
2026-07-10 CSC3860 - Jul 10, 17:30 UTCJul 11, 13:30 UTC20h 0m
2026-07-10 CSC3860 - Jul 10, 16:05 UTCJul 11, 13:15 UTC21h 11m
2026-07-10 CSC3860 - Jul 10, 07:55 UTCJul 10, 18:10 UTC10h 15m
2026-07-09 CSC3859 - Jul 9, 19:55 UTCJul 10, 05:25 UTC9h 30m
2026-07-08 CSC3859 - Jul 8, 23:30 UTCJul 9, 21:40 UTC22h 10m
2026-07-07 CSC3887 - Jul 7, 23:40 UTCJul 8, 13:10 UTC13h 30m
2026-07-07 CSC3887 - Jul 7, 13:20 UTCJul 8, 13:10 UTC23h 50m
2026-07-07 CSC3887 - Jul 7, 13:05 UTCJul 8, 00:00 UTC10h 55m
2026-07-05 CSC3896 - Jul 5, 11:35 UTCJul 5, 14:45 UTC3h 10m
2026-07-04 CSC3895 - Jul 4, 21:25 UTCJul 5, 04:45 UTC7h 20m
2026-07-03 CSC3895 - Jul 3, 23:50 UTCJul 4, 21:50 UTC22h 0m
2026-07-03 CSC3887 - Jul 3, 12:50 UTCJul 4, 00:00 UTC11h 10m
2026-07-02 CSC3896 - Jul 2, 13:20 UTCJul 3, 13:15 UTC23h 55m
2026-07-02 CSC3896 - Jul 2, 11:55 UTCJul 2, 15:15 UTC3h 20m
2026-07-01 CSC3895 - Jul 1, 12:30 UTCJul 2, 04:40 UTC16h 10m
2026-06-30 CSC8894 - Jun 30, 04:05 UTCJun 30, 04:25 UTC20m
2026-06-29 CSC3838 - Jun 29, 06:19 UTCJun 29, 19:05 UTC12h 45m
2026-06-28 CSC3837 - Jun 28, 16:49 UTCJun 29, 02:54 UTC10h 5m
2026-06-27 CSC3887 - Jun 27, 13:15 UTCJun 27, 13:30 UTC15m
2026-06-26 CSC3804 - Jun 26, 13:19 UTCJun 27, 13:15 UTC23h 55m
2026-06-26 CSC3804 - Jun 26, 09:55 UTCJun 26, 14:55 UTC5h 0m

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

Mode-S 781C2D frequently asked

What is Mode-S code 781C2D?
781C2D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-325J.
Where is Mode-S 781C2D registered?
Mode-S code 781C2D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C2D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C2D, octal 36016055, decimal 7,871,533.
What flights does 781C2D operate?
Mode-S 781C2D has broadcast 15 distinct callsigns, including CSC3887, CSC3815, CSC3838, CSC3837, CSC3804.