Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781FB6

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32F2 · AIRBUS A-321neo

Hex
781FB6
Octal
36017666
Decimal
7,872,438
Country
CN
Tail
B-32F2
Type
A21N
No current signal · last broadcast 4h ago
Flights observed
48
Distinct callsigns
19
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 781FB6.

Country allocation

The ICAO 24-bit address 781FB6 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 19 distinct

Callsign Airline Flights Last seen
CXA851 Xiamen Airlines 8 2026-05-30
CXA852 Xiamen Airlines 7 2026-05-30
CXA887 Xiamen Airlines 5 2026-05-27
CXA853 Xiamen Airlines 5 2026-05-24
CXA854 Xiamen Airlines 4 2026-05-24
CXA8536 - 4 2026-06-03
CXA888 Xiamen Airlines 3 2026-05-27
CXA864 Xiamen Airlines 1 2026-05-05
CXA863 Xiamen Airlines 1 2026-05-05
CXA8593 - 1 2026-05-31
CXA8535 - 1 2026-05-17
CXA8501 - 1 2026-05-02
CXA8401 Xiamen Airlines 1 2026-05-31
CXA8388 Xiamen Airlines 1 2026-04-24
CXA8387 Xiamen Airlines 1 2026-04-24
CXA834 Xiamen Airlines 1 2026-04-19
CXA833 Xiamen Airlines 1 2026-04-19
CXA8321 Xiamen Airlines 1 2026-04-26
CXA8307 Xiamen Airlines 1 2026-05-29

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-03 CXA8536 - Jun 3, 06:45 UTCJun 3, 07:15 UTC30m
2026-05-31 CXA8593 - May 31, 08:35 UTCMay 31, 08:45 UTC10m
2026-05-31 CXA8401 XMN → TFU May 31, 00:10 UTCMay 31, 00:20 UTC10m
2026-05-30 CXA852 SIN → XMN May 30, 07:55 UTCMay 30, 08:20 UTC25m
2026-05-30 CXA851 XMN → SIN May 30, 02:00 UTCMay 30, 05:40 UTC3h 40m
2026-05-29 CXA8307 XMN → SYX May 29, 09:10 UTCMay 29, 13:10 UTC4h 0m
2026-05-28 CXA852 SIN → XMN May 28, 07:50 UTCMay 28, 10:55 UTC3h 5m
2026-05-28 CXA851 XMN → SIN May 28, 02:40 UTCMay 28, 05:45 UTC3h 5m
2026-05-27 CXA888 TPE → XMN May 27, 04:04 UTCMay 28, 02:40 UTC22h 35m
2026-05-27 CXA887 XMN → TPE May 27, 01:19 UTCMay 27, 02:04 UTC45m
2026-05-24 CXA854 BKK → XMN May 24, 05:25 UTCMay 24, 07:40 UTC2h 15m
2026-05-24 CXA853 XMN → BKK May 24, 01:35 UTCMay 24, 04:00 UTC2h 25m
2026-05-23 CXA853 XMN → BKK May 23, 03:35 UTCMay 24, 03:30 UTC23h 55m
2026-05-23 CXA888 TPE → XMN May 23, 03:25 UTCMay 23, 03:55 UTC30m
2026-05-22 CXA887 XMN → TPE May 22, 07:40 UTCMay 23, 01:40 UTC18h 0m
2026-05-22 CXA851 XMN → SIN May 22, 05:20 UTCMay 22, 05:30 UTC10m
2026-05-21 CXA888 TPE → XMN May 21, 03:40 UTCMay 21, 04:10 UTC30m
2026-05-21 CXA887 XMN → TPE May 21, 01:30 UTCMay 21, 02:05 UTC35m
2026-05-20 CXA887 XMN → TPE May 20, 03:35 UTCMay 21, 02:05 UTC22h 31m
2026-05-20 CXA887 XMN → TPE May 20, 01:00 UTCMay 20, 01:40 UTC40m
2026-05-18 CXA8536 - May 18, 01:45 UTCMay 18, 07:25 UTC5h 40m
2026-05-17 CXA8536 - May 17, 06:45 UTCMay 17, 07:20 UTC35m
2026-05-17 CXA8535 - May 17, 01:25 UTCMay 17, 01:40 UTC15m
2026-05-13 CXA852 SIN → XMN May 13, 07:40 UTCMay 13, 07:55 UTC15m
2026-05-13 CXA851 XMN → SIN May 13, 04:55 UTCMay 13, 05:15 UTC20m
2026-05-09 CXA852 SIN → XMN May 9, 07:55 UTCMay 9, 08:10 UTC15m
2026-05-09 CXA851 XMN → SIN May 9, 02:10 UTCMay 9, 02:55 UTC45m
2026-05-08 CXA852 SIN → XMN May 8, 08:05 UTCMay 8, 08:29 UTC25m
2026-05-08 CXA851 XMN → SIN May 8, 02:19 UTCMay 8, 05:20 UTC3h 0m
2026-05-07 CXA854 BKK → XMN May 7, 05:40 UTCMay 7, 08:00 UTC2h 20m
2026-05-07 CXA853 XMN → BKK May 7, 01:30 UTCMay 7, 04:00 UTC2h 30m
2026-05-06 CXA852 SIN → XMN May 6, 08:01 UTCMay 6, 08:10 UTC10m
2026-05-06 CXA851 XMN → SIN May 6, 01:55 UTCMay 6, 05:25 UTC3h 30m
2026-05-05 CXA864 SIN → HGH May 5, 13:35 UTCMay 5, 15:45 UTC2h 10m
2026-05-05 CXA863 HGH → SIN May 5, 09:25 UTCMay 5, 12:10 UTC2h 45m
2026-05-02 CXA8501 - May 2, 23:20 UTCMay 2, 23:35 UTC15m
2026-05-02 CXA8536 - May 2, 01:20 UTCMay 2, 07:15 UTC5h 56m
2026-04-26 CXA8321 HGH → SYX Apr 26, 00:20 UTCApr 26, 04:25 UTC4h 5m
2026-04-24 CXA8388 SZX → HGH Apr 24, 09:35 UTCApr 24, 09:50 UTC15m
2026-04-24 CXA8387 HGH → SZX Apr 24, 06:10 UTCApr 24, 06:25 UTC15m
2026-04-22 CXA852 SIN → XMN Apr 22, 07:50 UTCApr 22, 09:15 UTC1h 25m
2026-04-21 CXA851 XMN → SIN Apr 21, 15:10 UTCApr 22, 05:35 UTC14h 25m
2026-04-19 CXA834 BKK → XMN Apr 19, 11:05 UTCApr 19, 13:20 UTC2h 15m
2026-04-19 CXA833 XMN → BKK Apr 19, 06:40 UTCApr 19, 09:30 UTC2h 50m
2026-04-17 CXA854 BKK → XMN Apr 17, 07:45 UTCApr 17, 08:00 UTC15m
2026-04-17 CXA854 BKK → XMN Apr 17, 05:50 UTCApr 17, 06:05 UTC15m
2026-04-17 CXA853 XMN → BKK Apr 17, 04:05 UTCApr 17, 04:20 UTC15m
2026-04-17 CXA853 XMN → BKK Apr 17, 01:50 UTCApr 17, 02:15 UTC25m

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-32F2 page for operator, model, and routing details .

Mode-S 781FB6 frequently asked

What is Mode-S code 781FB6?
781FB6 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32F2.
Where is Mode-S 781FB6 registered?
Mode-S code 781FB6 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781FB6 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 781FB6, octal 36017666, decimal 7,872,438.
What flights does 781FB6 operate?
Mode-S 781FB6 has broadcast 19 distinct callsigns, including CXA851, CXA852, CXA887, CXA853, CXA854.