Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781FFF

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32FX · AIRBUS A-320neo

Hex
781FFF
Octal
36017777
Decimal
7,872,511
Country
CN
Tail
B-32FX
Type
A20N
No current signal · last broadcast 4h ago
Flights observed
399
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 781FFF.

Country allocation

The ICAO 24-bit address 781FFF 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
CSN3089 - 35 2026-07-03
CSN3090 - 32 2026-07-03
CSN5079 - 20 2026-07-14
CSN5080 - 18 2026-07-14
CSN5085 - 14 2026-07-08
CSN5086 - 12 2026-07-09
CSN8469 China Southern Airlines 11 2026-06-11
CSN8158 - 11 2026-07-05
CSN8157 - 9 2026-07-05
CSN8474 - 8 2026-06-28
CSN8473 - 8 2026-06-28
CSN6445 - 8 2026-07-13
CSN8085 China Southern Airlines 7 2026-07-06
CSN8086 China Southern Airlines 6 2026-07-06
CSN6446 China Southern Airlines 6 2026-06-12
CSN6386 - 6 2026-06-20
CSN5861 - 6 2026-06-15
CSN3613 - 6 2026-07-13
CSN8470 China Southern Airlines 5 2026-06-11
CSN5853 - 5 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN5080 - Jul 14, 17:55 UTCJul 14, 18:10 UTC15m
2026-07-14 CSN5079 - Jul 14, 16:05 UTCJul 14, 16:40 UTC35m
2026-07-14 CSN5079 - Jul 14, 13:15 UTCJul 14, 13:25 UTC10m
2026-07-14 CSN8598 - Jul 14, 09:50 UTCJul 14, 10:45 UTC55m
2026-07-14 CSN8597 - Jul 14, 05:55 UTCJul 14, 06:05 UTC10m
2026-07-13 CSN6445 - Jul 13, 11:15 UTCJul 13, 11:25 UTC10m
2026-07-13 CSN3613 - Jul 13, 02:55 UTCJul 13, 06:45 UTC3h 50m
2026-07-13 CSN3613 - Jul 13, 00:35 UTCJul 13, 00:50 UTC15m
2026-07-12 CSN5080 - Jul 12, 21:15 UTCJul 12, 21:35 UTC20m
2026-07-12 CSN5080 - Jul 12, 18:01 UTCJul 12, 18:15 UTC15m
2026-07-12 CSN5079 - Jul 12, 15:55 UTCJul 12, 16:05 UTC10m
2026-07-12 CSN5079 - Jul 12, 12:50 UTCJul 12, 13:01 UTC10m
2026-07-12 CSN8598 - Jul 12, 09:35 UTCJul 12, 10:20 UTC45m
2026-07-12 CSN8597 - Jul 12, 05:10 UTCJul 12, 05:20 UTC10m
2026-07-12 CSN6254 - Jul 12, 03:10 UTCJul 12, 03:25 UTC15m
2026-07-12 CSN6253 - Jul 12, 00:10 UTCJul 12, 00:25 UTC15m
2026-07-11 CSN3614 - Jul 11, 09:10 UTCJul 11, 09:35 UTC25m
2026-07-11 CSN3614 - Jul 11, 03:15 UTCJul 11, 07:05 UTC3h 50m
2026-07-11 CSN3613 - Jul 11, 00:55 UTCJul 11, 01:05 UTC10m
2026-07-10 CSN8498 - Jul 10, 14:45 UTCJul 10, 15:30 UTC45m
2026-07-10 CSN8497 - Jul 10, 10:00 UTCJul 10, 10:10 UTC10m
2026-07-10 CSN5101 - Jul 10, 04:35 UTCJul 10, 08:45 UTC4h 10m
2026-07-09 CSN3798 - Jul 9, 11:05 UTCJul 9, 11:50 UTC45m
2026-07-09 CSN3797 - Jul 9, 03:50 UTCJul 9, 04:05 UTC15m
2026-07-09 CSN5086 - Jul 9, 00:30 UTCJul 9, 00:45 UTC15m
2026-07-08 CSN5086 - Jul 8, 21:10 UTCJul 8, 21:35 UTC25m
2026-07-08 CSN5085 - Jul 8, 18:55 UTCJul 8, 19:25 UTC30m
2026-07-08 CSN5085 - Jul 8, 16:10 UTCJul 8, 16:20 UTC10m
2026-07-08 CSN6480 - Jul 8, 13:25 UTCJul 8, 14:10 UTC45m
2026-07-08 CSN6479 - Jul 8, 09:15 UTCJul 8, 09:25 UTC10m
2026-07-07 CSN3173 - Jul 7, 16:10 UTCJul 7, 16:25 UTC15m
2026-07-07 CSN8477 - Jul 7, 07:15 UTCJul 7, 07:30 UTC15m
2026-07-06 CSN5086 - Jul 6, 21:00 UTCJul 6, 21:30 UTC30m
2026-07-06 CSN5085 - Jul 6, 19:25 UTCJul 6, 19:55 UTC30m
2026-07-06 CSN5085 - Jul 6, 16:35 UTCJul 6, 16:50 UTC15m
2026-07-06 CSN8086 HAN → SZX Jul 6, 13:15 UTCJul 6, 13:25 UTC10m
2026-07-06 CSN8085 SZX → HAN Jul 6, 11:30 UTCJul 6, 11:50 UTC20m
2026-07-06 CSN8085 SZX → HAN Jul 6, 10:40 UTCJul 6, 10:50 UTC10m
2026-07-06 CSN3566 - Jul 6, 08:10 UTCJul 6, 08:20 UTC10m
2026-07-06 CSN3565 - Jul 6, 01:35 UTCJul 6, 01:50 UTC15m
2026-07-05 CSN8158 - Jul 5, 23:10 UTCJul 5, 23:20 UTC10m
2026-07-05 CSN8158 - Jul 5, 21:05 UTCJul 5, 21:55 UTC50m
2026-07-05 CSN8157 - Jul 5, 17:35 UTCJul 5, 19:45 UTC2h 10m
2026-07-05 CSN5387 - Jul 5, 08:10 UTCJul 5, 08:20 UTC10m
2026-07-05 CSN3650 - Jul 5, 06:25 UTCJul 5, 06:35 UTC10m
2026-07-04 CSN3649 - Jul 4, 23:20 UTCJul 4, 23:30 UTC10m
2026-07-04 CSN5854 SYX → SZX Jul 4, 17:30 UTCJul 4, 18:00 UTC30m
2026-07-04 CSN5853 - Jul 4, 11:30 UTCJul 4, 11:50 UTC20m
2026-07-04 CSN8993 - Jul 4, 03:55 UTCJul 4, 04:10 UTC15m
2026-07-03 CSN8612 JHG → SZX Jul 3, 15:00 UTCJul 3, 15:10 UTC10m

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

Mode-S 781FFF frequently asked

What is Mode-S code 781FFF?
781FFF is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32FX.
Where is Mode-S 781FFF registered?
Mode-S code 781FFF is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FFF broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781FFF, octal 36017777, decimal 7,872,511.
What flights does 781FFF operate?
Mode-S 781FFF has broadcast 20 distinct callsigns, including CSN3089, CSN3090, CSN5079, CSN5080, CSN5085.