Apparatus

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sensors Mode-S transponder

781D44

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-328M · AIRBUS A-320neo

Hex
781D44
Octal
36016504
Decimal
7,871,812
Country
CN
Tail
B-328M
Type
A20N
No current signal · last broadcast 4d ago
Flights observed
83
Distinct callsigns
20
Country
CN
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 781D44.

Country allocation

The ICAO 24-bit address 781D44 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
CSC3783 - 12 2026-06-28
CSC3771 - 11 2026-07-07
CSC3784 - 8 2026-06-28
CSC3348 Sichuan Airlines 8 2026-06-02
CSC3772 - 6 2026-07-07
CSC3344 Sichuan Airlines 4 2026-06-03
CSC8786 - 3 2026-07-06
CSC8784 - 3 2026-06-25
CSC8782 - 3 2026-06-18
CSC6758 - 3 2026-05-17
CSC8783 - 2 2026-06-25
CSC8781 - 2 2026-06-18
CSC8048 - 2 2026-07-10
CSC6757 - 2 2026-05-01
CSC3704 Sichuan Airlines 2 2026-04-21
CSC3703 Sichuan Airlines 2 2026-04-21
CSC3272 Sichuan Airlines 2 2026-04-22
CSC8165 Sichuan Airlines 1 2026-06-10
CSC8005 - 1 2026-06-20
CSC8004 - 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 CSC8048 - Jul 10, 02:10 UTCJul 10, 02:25 UTC15m
2026-07-07 CSC3772 - Jul 7, 13:25 UTCJul 7, 14:50 UTC1h 25m
2026-07-07 CSC3771 - Jul 7, 01:15 UTCJul 7, 12:15 UTC11h 0m
2026-07-06 CSC8786 - Jul 6, 15:45 UTCJul 6, 15:55 UTC10m
2026-07-03 CSC3772 - Jul 3, 13:15 UTCJul 3, 14:35 UTC1h 20m
2026-07-03 CSC3771 - Jul 3, 10:20 UTCJul 3, 11:40 UTC1h 20m
2026-07-02 CSC3771 - Jul 2, 13:25 UTCJul 3, 11:40 UTC22h 15m
2026-07-02 CSC3771 - Jul 2, 01:10 UTCJul 2, 11:40 UTC10h 30m
2026-06-29 CSC3772 - Jun 29, 13:24 UTCJun 29, 14:54 UTC1h 30m
2026-06-29 CSC3771 - Jun 29, 01:10 UTCJun 29, 11:29 UTC10h 20m
2026-06-28 CSC3784 - Jun 28, 11:04 UTCJun 29, 10:59 UTC23h 55m
2026-06-28 CSC3783 - Jun 28, 08:29 UTCJun 28, 09:55 UTC1h 25m
2026-06-27 CSC3783 - Jun 27, 13:04 UTCJun 28, 09:55 UTC20h 50m
2026-06-27 CSC3771 - Jun 27, 01:19 UTCJun 27, 11:39 UTC10h 20m
2026-06-26 CSC3771 - Jun 26, 13:34 UTCJun 27, 11:39 UTC22h 5m
2026-06-26 CSC3771 - Jun 26, 11:20 UTCJun 26, 11:55 UTC35m
2026-06-25 CSC8784 - Jun 25, 08:40 UTCJun 25, 08:55 UTC15m
2026-06-25 CSC8783 - Jun 25, 06:44 UTCJun 25, 07:00 UTC15m
2026-06-21 CSC3784 - Jun 21, 11:05 UTCJun 21, 12:14 UTC1h 10m
2026-06-21 CSC3783 - Jun 21, 08:25 UTCJun 21, 09:49 UTC1h 25m
2026-06-20 CSC3783 - Jun 20, 10:44 UTCJun 21, 08:44 UTC22h 0m
2026-06-20 CSC8005 - Jun 20, 08:55 UTCJun 20, 10:44 UTC1h 50m
2026-06-19 CSC8784 - Jun 19, 10:04 UTCJun 19, 10:14 UTC10m
2026-06-19 CSC8783 - Jun 19, 08:40 UTCJun 19, 08:50 UTC10m
2026-06-18 CSC8782 - Jun 18, 04:30 UTCJun 18, 04:40 UTC10m
2026-06-18 CSC8781 - Jun 18, 01:05 UTCJun 18, 01:20 UTC15m
2026-06-17 CSC8782 - Jun 17, 02:45 UTCJun 17, 02:55 UTC10m
2026-06-17 CSC8781 - Jun 17, 00:45 UTCJun 17, 00:55 UTC10m
2026-06-16 CSC8784 - Jun 16, 11:30 UTCJun 16, 11:45 UTC15m
2026-06-14 CSC3784 - Jun 14, 11:15 UTCJun 14, 12:25 UTC1h 10m
2026-06-14 CSC3783 - Jun 14, 09:25 UTCJun 14, 10:00 UTC35m
2026-06-14 CSC3783 - Jun 14, 01:45 UTCJun 14, 08:50 UTC7h 5m
2026-06-10 CSC8165 CKG → HRB Jun 10, 01:55 UTCJun 10, 02:15 UTC20m
2026-06-08 CSC8048 ZUH → CKG Jun 8, 01:55 UTCJun 8, 02:15 UTC20m
2026-06-07 CSC8786 SZX → CKG Jun 7, 15:30 UTCJun 7, 15:40 UTC10m
2026-06-07 - - Jun 7, 14:05 UTCJun 7, 14:15 UTC10m
2026-06-05 CSC3784 TSA → CKG Jun 5, 11:00 UTCJun 5, 12:20 UTC1h 20m
2026-06-05 CSC3783 CKG → TSA Jun 5, 09:20 UTCJun 5, 09:50 UTC30m
2026-06-05 CSC3783 CKG → TSA Jun 5, 08:25 UTCJun 5, 08:50 UTC25m
2026-06-03 CSC3344 WUH → HRB Jun 3, 01:45 UTCJun 3, 13:20 UTC11h 35m
2026-06-02 CSC3348 CGO → HRB Jun 2, 13:00 UTCJun 3, 01:55 UTC12h 55m
2026-05-30 CSC3344 WUH → HRB May 30, 11:55 UTCMay 30, 12:10 UTC15m
2026-05-29 CSC3344 WUH → HRB May 29, 13:05 UTCMay 30, 12:10 UTC23h 6m
2026-05-28 CSC3348 CGO → HRB May 28, 13:05 UTCMay 29, 13:00 UTC23h 55m
2026-05-28 CSC3348 CGO → HRB May 28, 12:55 UTCMay 28, 13:10 UTC15m
2026-05-27 CSC3348 CGO → HRB May 27, 12:45 UTCMay 27, 13:00 UTC15m
2026-05-26 CSC3348 CGO → HRB May 26, 12:45 UTCMay 26, 13:00 UTC15m
2026-05-25 CSC3348 CGO → HRB May 25, 14:25 UTCMay 26, 13:00 UTC22h 34m
2026-05-21 CSC3348 CGO → HRB May 21, 13:01 UTCMay 21, 13:20 UTC20m
2026-05-20 CSC3348 CGO → HRB May 20, 13:05 UTCMay 21, 13:01 UTC23h 55m

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-328M page for operator, model, and routing details .

Mode-S 781D44 frequently asked

What is Mode-S code 781D44?
781D44 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-328M.
Where is Mode-S 781D44 registered?
Mode-S code 781D44 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781D44 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781D44, octal 36016504, decimal 7,871,812.
What flights does 781D44 operate?
Mode-S 781D44 has broadcast 20 distinct callsigns, including CSC3783, CSC3771, CSC3784, CSC3348, CSC3772.