Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781F25

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32DG · AIRBUS A-321neo

Hex
781F25
Octal
36017445
Decimal
7,872,293
Country
CN
Tail
B-32DG
Type
A21N
No current signal · last broadcast 3d ago
Flights observed
350
Distinct callsigns
20
Country
CN
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 781F25.

Country allocation

The ICAO 24-bit address 781F25 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
CSN8354 - 43 2026-07-10
CSN8353 - 36 2026-07-10
CSN8118 - 31 2026-07-10
CSN8117 - 26 2026-07-10
CSN5031 - 16 2026-07-01
CSN5032 - 15 2026-07-01
CSN5795 China Southern Airlines 8 2026-06-04
CSN6481 - 6 2026-07-07
CSN8048 China Southern Airlines 5 2026-06-16
CSN8047 - 4 2026-06-16
CSN6591 China Southern Airlines 4 2026-06-12
CSN3613 - 4 2026-07-08
CSN3451 - 4 2026-06-25
CSN3167 China Southern Airlines 4 2026-06-14
CSN6592 - 3 2026-06-29
CSN6386 - 3 2026-07-11
CSN5080 China Southern Airlines 3 2026-04-17
CSN5079 China Southern Airlines 3 2026-04-17
CSN3559 - 3 2026-07-09
CSN3351 - 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 CSN5120 - Jul 11, 11:25 UTCJul 11, 11:40 UTC15m
2026-07-11 CSN6386 - Jul 11, 09:20 UTCJul 11, 09:40 UTC20m
2026-07-11 CSN6386 - Jul 11, 03:45 UTCJul 11, 07:20 UTC3h 35m
2026-07-11 CSN6385 - Jul 11, 01:25 UTCJul 11, 01:40 UTC15m
2026-07-10 CSN8354 - Jul 10, 21:50 UTCJul 10, 22:05 UTC15m
2026-07-10 CSN8354 - Jul 10, 17:25 UTCJul 10, 18:50 UTC1h 25m
2026-07-10 CSN8353 - Jul 10, 11:15 UTCJul 10, 11:25 UTC10m
2026-07-10 CSN8118 - Jul 10, 05:40 UTCJul 10, 06:05 UTC25m
2026-07-10 CSN8117 - Jul 10, 00:55 UTCJul 10, 04:15 UTC3h 20m
2026-07-09 CSN5842 - Jul 9, 15:55 UTCJul 9, 16:05 UTC10m
2026-07-09 CSN5841 - Jul 9, 08:25 UTCJul 9, 08:35 UTC10m
2026-07-09 CSN3560 - Jul 9, 06:05 UTCJul 9, 06:45 UTC40m
2026-07-09 CSN3559 - Jul 9, 00:20 UTCJul 9, 00:30 UTC10m
2026-07-08 CSN8354 - Jul 8, 22:10 UTCJul 8, 22:25 UTC15m
2026-07-08 CSN8354 - Jul 8, 17:50 UTCJul 8, 19:20 UTC1h 30m
2026-07-08 CSN8353 - Jul 8, 15:25 UTCJul 8, 15:40 UTC15m
2026-07-08 CSN8353 - Jul 8, 11:20 UTCJul 8, 11:35 UTC15m
2026-07-08 CSN3614 - Jul 8, 02:55 UTCJul 8, 09:35 UTC6h 40m
2026-07-08 CSN3613 - Jul 8, 00:40 UTCJul 8, 00:50 UTC10m
2026-07-07 CSN6482 - Jul 7, 13:25 UTCJul 7, 13:40 UTC15m
2026-07-07 CSN6481 - Jul 7, 06:05 UTCJul 7, 10:30 UTC4h 25m
2026-07-07 CSN6481 - Jul 7, 03:50 UTCJul 7, 04:00 UTC10m
2026-07-06 CSN6549 - Jul 6, 14:30 UTCJul 6, 14:40 UTC10m
2026-07-06 CSN6481 - Jul 6, 04:15 UTCJul 6, 10:00 UTC5h 45m
2026-07-06 CSN6481 - Jul 6, 02:00 UTCJul 6, 02:10 UTC10m
2026-07-05 CSN6548 - Jul 5, 16:00 UTCJul 5, 16:15 UTC15m
2026-07-05 CSN6547 - Jul 5, 11:10 UTCJul 5, 11:20 UTC10m
2026-07-05 CSN6922 - Jul 5, 09:25 UTCJul 5, 09:35 UTC10m
2026-07-05 CSN6921 - Jul 5, 03:50 UTCJul 5, 04:00 UTC10m
2026-07-05 CSN3366 - Jul 5, 02:15 UTCJul 5, 02:25 UTC10m
2026-07-04 CSN3365 - Jul 4, 18:20 UTCJul 4, 18:35 UTC15m
2026-07-04 CSN8492 - Jul 4, 14:10 UTCJul 4, 14:25 UTC15m
2026-07-04 CSN8491 - Jul 4, 07:25 UTCJul 4, 07:40 UTC15m
2026-07-04 CSN6850 - Jul 4, 04:15 UTCJul 4, 04:30 UTC15m
2026-07-03 CSN6849 - Jul 3, 23:20 UTCJul 3, 23:30 UTC10m
2026-07-03 CSN5634 - Jul 3, 14:10 UTCJul 3, 14:35 UTC25m
2026-07-03 CSN5634 - Jul 3, 08:10 UTCJul 3, 12:00 UTC3h 50m
2026-07-03 CSN5633 - Jul 3, 05:55 UTCJul 3, 06:10 UTC15m
2026-07-02 CSN3577 - Jul 2, 13:30 UTCJul 2, 13:40 UTC10m
2026-07-02 CSN3552 - Jul 2, 11:05 UTCJul 2, 12:00 UTC55m
2026-07-02 CSN3551 - Jul 2, 04:15 UTCJul 2, 04:25 UTC10m
2026-07-01 CSN5032 - Jul 1, 07:55 UTCJul 1, 08:20 UTC25m
2026-07-01 CSN5031 - Jul 1, 05:30 UTCJul 1, 06:05 UTC35m
2026-07-01 CSN5031 - Jul 1, 02:40 UTCJul 1, 02:50 UTC10m
2026-06-30 CSN8354 CGK → SZX Jun 30, 22:15 UTCJun 30, 22:35 UTC20m
2026-06-30 CSN8354 CGK → SZX Jun 30, 17:50 UTCJun 30, 19:15 UTC1h 25m
2026-06-30 CSN8353 - Jun 30, 15:50 UTCJun 30, 16:05 UTC15m
2026-06-30 CSN8353 - Jun 30, 11:45 UTCJun 30, 11:55 UTC10m
2026-06-30 CSN8118 - Jun 30, 05:55 UTCJun 30, 06:20 UTC25m
2026-06-30 CSN8117 - Jun 30, 03:35 UTCJun 30, 04:05 UTC30m

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-32DG page for operator, model, and routing details .

Mode-S 781F25 frequently asked

What is Mode-S code 781F25?
781F25 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32DG.
Where is Mode-S 781F25 registered?
Mode-S code 781F25 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F25 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F25, octal 36017445, decimal 7,872,293.
What flights does 781F25 operate?
Mode-S 781F25 has broadcast 20 distinct callsigns, including CSN8354, CSN8353, CSN8118, CSN8117, CSN5031.