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 13h ago
Flights observed
154
Distinct callsigns
13
Country
CN
Last broadcast
13h ago

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 13 distinct

Callsign Airline Flights Last seen
CSC3887 - 36 2026-07-11
CSC3815 - 18 2026-06-24
CSC3837 - 17 2026-07-12
CSC3838 - 15 2026-07-13
CSC3804 - 13 2026-06-26
CSC3803 - 11 2026-06-25
CSC3816 Sichuan Airlines 9 2026-06-25
CSC3896 - 8 2026-07-05
CSC3860 - 8 2026-07-10
CSC3895 - 7 2026-07-04
CSC3888 - 6 2026-07-11
CSC3859 - 5 2026-07-09
CSC8894 - 1 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-25 CSC3803 - Jun 25, 21:10 UTCJun 26, 04:59 UTC7h 50m
2026-06-25 CSC3816 LED → TFU Jun 25, 00:59 UTCJun 25, 21:15 UTC20h 15m
2026-06-24 CSC3815 - Jun 24, 12:54 UTCJun 25, 01:30 UTC12h 35m
2026-06-23 CSC3815 - Jun 23, 17:20 UTCJun 24, 13:24 UTC20h 5m
2026-06-23 CSC3860 - Jun 23, 17:09 UTCJun 24, 13:14 UTC20h 5m
2026-06-23 CSC3860 - Jun 23, 07:45 UTCJun 23, 17:34 UTC9h 50m
2026-06-23 CSC3859 - Jun 23, 01:20 UTCJun 23, 05:20 UTC4h 0m
2026-06-21 CSC3887 - Jun 21, 12:55 UTCJun 21, 13:20 UTC25m
2026-06-20 CSC3838 - Jun 20, 17:19 UTCJun 21, 13:20 UTC20h 0m
2026-06-20 CSC3838 - Jun 20, 16:19 UTCJun 21, 13:20 UTC21h 0m
2026-06-20 CSC3838 - Jun 20, 06:24 UTCJun 20, 18:34 UTC12h 10m
2026-06-19 CSC3837 - Jun 19, 17:09 UTCJun 20, 03:44 UTC10h 35m
2026-06-18 CSC3837 - Jun 18, 17:40 UTCJun 19, 17:14 UTC23h 34m
2026-06-18 CSC3896 - Jun 18, 11:25 UTCJun 18, 17:40 UTC6h 15m
2026-06-17 CSC3895 - Jun 17, 21:25 UTCJun 18, 04:35 UTC7h 10m
2026-06-15 CSC3838 - Jun 15, 06:35 UTCJun 15, 18:55 UTC12h 20m
2026-06-14 CSC3837 - Jun 14, 16:50 UTCJun 15, 03:00 UTC10h 9m
2026-06-14 CSC3837 - Jun 14, 00:00 UTCJun 14, 18:30 UTC18h 31m
2026-06-13 CSC3888 SVO → SVO Jun 13, 20:35 UTCJun 13, 21:05 UTC30m
2026-06-12 CSC3887 TFU → SVO Jun 12, 23:10 UTCJun 13, 13:05 UTC13h 54m
2026-06-12 CSC3887 TFU → SVO Jun 12, 12:50 UTCJun 12, 23:30 UTC10h 40m
2026-06-11 CSC3887 TFU → SVO Jun 11, 16:05 UTCJun 12, 13:10 UTC21h 6m
2026-06-11 CSC3815 TFU → LED Jun 11, 13:20 UTCJun 12, 13:10 UTC23h 51m
2026-06-11 CSC3815 TFU → LED Jun 11, 13:05 UTCJun 11, 16:15 UTC3h 10m

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 13h ago.
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 13 distinct callsigns, including CSC3887, CSC3815, CSC3837, CSC3838, CSC3804.