Apparatus

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sensors Mode-S transponder

781FB5

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32F3 · AIRBUS A-321neo

Hex
781FB5
Octal
36017665
Decimal
7,872,437
Country
CN
Tail
B-32F3
Type
A21N
No current signal · last broadcast 2d ago
Flights observed
56
Distinct callsigns
17
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781FB5.

Country allocation

The ICAO 24-bit address 781FB5 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 17 distinct

Callsign Airline Flights Last seen
CXA851 Xiamen Airlines 16 2026-06-01
CXA852 Xiamen Airlines 12 2026-06-01
CXA887 Xiamen Airlines 4 2026-05-30
CXA834 Xiamen Airlines 4 2026-05-31
CXA833 Xiamen Airlines 4 2026-05-31
CXA854 Xiamen Airlines 3 2026-05-10
CXA853 Xiamen Airlines 3 2026-05-10
CXA888 Xiamen Airlines 1 2026-05-24
CXA8536 - 1 2026-04-26
CXA8431 - 1 2026-05-17
CXA8388 Xiamen Airlines 1 2026-04-28
CXA8387 Xiamen Airlines 1 2026-04-28
CXA8362 Xiamen Airlines 1 2026-04-22
CXA8361 Xiamen Airlines 1 2026-05-06
CXA8311 Xiamen Airlines 1 2026-04-23
CXA8308 Xiamen Airlines 1 2026-05-28
CXA8307 Xiamen Airlines 1 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 CXA852 SIN → XMN Jun 1, 07:45 UTCJun 1, 10:30 UTC2h 45m
2026-06-01 CXA851 XMN → SIN Jun 1, 02:55 UTCJun 1, 05:45 UTC2h 50m
2026-05-31 CXA834 BKK → XMN May 31, 11:05 UTCMay 31, 13:30 UTC2h 25m
2026-05-31 CXA833 XMN → BKK May 31, 00:40 UTCMay 31, 09:30 UTC8h 50m
2026-05-30 CXA834 BKK → XMN May 30, 10:50 UTCMay 30, 13:15 UTC2h 25m
2026-05-30 CXA833 XMN → BKK May 30, 03:25 UTCMay 30, 09:10 UTC5h 45m
2026-05-30 CXA887 XMN → TPE May 30, 01:15 UTCMay 30, 01:40 UTC25m
2026-05-29 CXA834 BKK → XMN May 29, 10:55 UTCMay 29, 13:20 UTC2h 25m
2026-05-29 CXA833 XMN → BKK May 29, 03:20 UTCMay 29, 09:15 UTC5h 55m
2026-05-29 CXA887 XMN → TPE May 29, 01:10 UTCMay 29, 01:40 UTC30m
2026-05-28 CXA8308 SYX → XMN May 28, 13:40 UTCMay 28, 14:00 UTC20m
2026-05-28 CXA8307 XMN → SYX May 28, 03:25 UTCMay 28, 11:10 UTC7h 45m
2026-05-27 CXA887 XMN → TPE May 27, 08:55 UTCMay 28, 01:45 UTC16h 50m
2026-05-24 CXA834 BKK → XMN May 24, 10:50 UTCMay 24, 13:10 UTC2h 20m
2026-05-24 CXA833 XMN → BKK May 24, 07:05 UTCMay 24, 09:35 UTC2h 30m
2026-05-24 CXA888 TPE → XMN May 24, 03:35 UTCMay 24, 04:45 UTC1h 10m
2026-05-24 CXA887 XMN → TPE May 24, 01:15 UTCMay 24, 01:45 UTC30m
2026-05-19 CXA852 SIN → XMN May 19, 07:50 UTCMay 19, 10:55 UTC3h 5m
2026-05-17 CXA8431 - May 17, 06:50 UTCMay 17, 07:00 UTC10m
2026-05-12 CXA852 SIN → XMN May 12, 07:55 UTCMay 12, 08:10 UTC15m
2026-05-12 CXA851 XMN → SIN May 12, 05:15 UTCMay 12, 05:30 UTC15m
2026-05-10 CXA854 BKK → XMN May 10, 05:34 UTCMay 10, 07:55 UTC2h 20m
2026-05-10 CXA853 XMN → BKK May 10, 01:24 UTCMay 10, 03:55 UTC2h 30m
2026-05-08 CXA854 BKK → XMN May 8, 05:39 UTCMay 8, 07:55 UTC2h 15m
2026-05-08 CXA853 XMN → BKK May 8, 01:14 UTCMay 8, 03:44 UTC2h 30m
2026-05-06 CXA8361 XMN → HAK May 6, 10:45 UTCMay 6, 13:55 UTC3h 10m
2026-05-05 CXA852 SIN → XMN May 5, 07:55 UTCMay 5, 08:10 UTC15m
2026-05-05 CXA851 XMN → SIN May 5, 05:15 UTCMay 5, 05:25 UTC10m
2026-05-04 CXA852 SIN → XMN May 4, 08:00 UTCMay 4, 08:15 UTC15m
2026-05-04 CXA851 XMN → SIN May 4, 05:20 UTCMay 4, 05:35 UTC15m
2026-05-03 CXA852 SIN → XMN May 3, 08:20 UTCMay 4, 05:35 UTC21h 15m
2026-05-03 CXA851 XMN → SIN May 3, 06:05 UTCMay 3, 06:35 UTC30m
2026-05-03 CXA851 XMN → SIN May 3, 02:55 UTCMay 3, 03:05 UTC10m
2026-05-02 CXA852 SIN → XMN May 2, 07:50 UTCMay 2, 08:10 UTC20m
2026-05-02 CXA851 XMN → SIN May 2, 05:20 UTCMay 2, 05:45 UTC25m
2026-05-01 CXA852 SIN → XMN May 1, 08:35 UTCMay 2, 05:45 UTC21h 10m
2026-05-01 CXA851 XMN → SIN May 1, 06:00 UTCMay 1, 06:25 UTC25m
2026-04-30 CXA851 XMN → SIN Apr 30, 08:00 UTCMay 1, 06:25 UTC22h 25m
2026-04-30 CXA851 XMN → SIN Apr 30, 05:30 UTCApr 30, 06:05 UTC35m
2026-04-28 CXA8388 SZX → HGH Apr 28, 06:40 UTCApr 28, 06:50 UTC10m
2026-04-28 CXA8387 HGH → SZX Apr 28, 04:50 UTCApr 28, 05:15 UTC25m
2026-04-26 CXA8536 - Apr 26, 06:35 UTCApr 26, 06:55 UTC20m
2026-04-23 CXA8311 HGH → CAN Apr 23, 15:50 UTCApr 23, 16:05 UTC15m
2026-04-22 CXA8362 HAK → XMN Apr 22, 13:55 UTCApr 22, 14:10 UTC15m
2026-04-22 CXA854 BKK → XMN Apr 22, 05:45 UTCApr 22, 11:25 UTC5h 40m
2026-04-22 CXA853 XMN → BKK Apr 22, 00:55 UTCApr 22, 03:45 UTC2h 50m
2026-04-21 CXA852 SIN → XMN Apr 21, 07:50 UTCApr 21, 09:10 UTC1h 20m
2026-04-21 CXA851 XMN → SIN Apr 21, 04:10 UTCApr 21, 05:30 UTC1h 20m
2026-04-20 CXA852 SIN → XMN Apr 20, 07:45 UTCApr 20, 09:10 UTC1h 25m
2026-04-20 CXA851 XMN → SIN Apr 20, 02:50 UTCApr 20, 06:10 UTC3h 20m

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-32F3 page for operator, model, and routing details .

Mode-S 781FB5 frequently asked

What is Mode-S code 781FB5?
781FB5 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32F3.
Where is Mode-S 781FB5 registered?
Mode-S code 781FB5 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FB5 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781FB5, octal 36017665, decimal 7,872,437.
What flights does 781FB5 operate?
Mode-S 781FB5 has broadcast 17 distinct callsigns, including CXA851, CXA852, CXA887, CXA834, CXA833.