Apparatus

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sensors Mode-S transponder

781F7C

ICAO 24-bit transponder address · allocated to China

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

Hex
781F7C
Octal
36017574
Decimal
7,872,380
Country
CN
Tail
B-32EK
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
84
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781F7C.

Country allocation

The ICAO 24-bit address 781F7C 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
CXA852 Xiamen Airlines 11 2026-06-05
CXA851 Xiamen Airlines 10 2026-06-05
CXA833 Xiamen Airlines 7 2026-05-27
CXA853 - 6 2026-07-12
CXA834 Xiamen Airlines 6 2026-05-27
CXA887 - 5 2026-07-16
CXA854 - 5 2026-07-12
CXA843 - 5 2026-07-16
CXA888 - 3 2026-07-16
CXA844 - 3 2026-07-16
CXA8387 - 3 2026-06-25
CXA8536 - 2 2026-05-27
CXA8388 - 2 2026-06-25
CXA8315 Xiamen Airlines 2 2026-05-01
CXA8816 - 1 2026-07-13
CXA8812 - 1 2026-07-01
CXA8437 - 1 2026-07-10
CXA8397 - 1 2026-07-08
CXA8394 - 1 2026-07-06
CXA8359 Xiamen Airlines 1 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CXA844 - Jul 16, 19:25 UTCJul 17, 07:35 UTC12h 10m
2026-07-16 CXA843 - Jul 16, 18:00 UTCJul 16, 18:25 UTC25m
2026-07-16 CXA843 - Jul 16, 15:35 UTCJul 16, 16:15 UTC40m
2026-07-16 CXA888 - Jul 16, 04:50 UTCJul 16, 05:35 UTC45m
2026-07-16 CXA887 - Jul 16, 02:20 UTCJul 16, 03:15 UTC55m
2026-07-14 CXA844 - Jul 14, 19:30 UTCJul 14, 22:05 UTC2h 35m
2026-07-14 CXA843 - Jul 14, 17:10 UTCJul 14, 17:25 UTC15m
2026-07-14 CXA843 - Jul 14, 14:50 UTCJul 14, 15:25 UTC35m
2026-07-13 CXA8816 - Jul 13, 09:30 UTCJul 13, 13:15 UTC3h 45m
2026-07-12 CXA854 - Jul 12, 07:35 UTCJul 12, 08:01 UTC25m
2026-07-12 CXA854 - Jul 12, 05:45 UTCJul 12, 05:55 UTC10m
2026-07-12 CXA853 - Jul 12, 03:55 UTCJul 12, 04:20 UTC25m
2026-07-12 CXA853 - Jul 12, 01:40 UTCJul 12, 02:01 UTC20m
2026-07-10 CXA8437 - Jul 10, 11:00 UTCJul 10, 11:15 UTC15m
2026-07-09 CXA8128 - Jul 9, 08:20 UTCJul 9, 09:00 UTC40m
2026-07-08 CXA8397 - Jul 8, 00:35 UTCJul 8, 01:20 UTC45m
2026-07-07 CXA888 - Jul 7, 03:35 UTCJul 7, 04:35 UTC1h 0m
2026-07-06 CXA887 - Jul 6, 11:15 UTCJul 7, 02:05 UTC14h 50m
2026-07-06 CXA8394 - Jul 6, 06:15 UTCJul 6, 06:45 UTC30m
2026-07-05 CXA8339 - Jul 5, 12:30 UTCJul 5, 12:45 UTC15m
2026-07-01 CXA8812 - Jul 1, 13:40 UTCJul 1, 14:10 UTC30m
2026-06-25 CXA8388 - Jun 25, 07:34 UTCJun 25, 07:45 UTC10m
2026-06-25 CXA8387 - Jun 25, 04:54 UTCJun 25, 05:55 UTC1h 0m
2026-06-18 CXA8350 SZX → PKX Jun 18, 16:50 UTCJun 18, 17:05 UTC15m
2026-06-18 CXA8349 - Jun 18, 14:45 UTCJun 18, 15:10 UTC25m
2026-06-16 CXA8388 - Jun 16, 08:15 UTCJun 16, 08:25 UTC10m
2026-06-16 CXA8387 - Jun 16, 05:55 UTCJun 16, 06:04 UTC10m
2026-06-05 CXA852 SIN → XMN Jun 5, 07:55 UTCJun 5, 08:20 UTC25m
2026-06-05 CXA851 XMN → SIN Jun 5, 02:45 UTCJun 5, 05:50 UTC3h 5m
2026-06-04 CXA851 XMN → SIN Jun 4, 07:05 UTCJun 5, 05:50 UTC22h 45m
2026-06-04 CXA854 BKK → XMN Jun 4, 05:40 UTCJun 5, 02:45 UTC21h 5m
2026-06-04 CXA853 XMN → BKK Jun 4, 01:35 UTCJun 4, 04:05 UTC2h 30m
2026-06-03 CXA853 XMN → BKK Jun 3, 07:50 UTCJun 4, 04:05 UTC20h 15m
2026-06-03 CXA851 XMN → SIN Jun 3, 05:10 UTCJun 3, 05:25 UTC15m
2026-05-31 CXA852 SIN → XMN May 31, 10:45 UTCMay 31, 11:05 UTC20m
2026-05-29 CXA852 SIN → XMN May 29, 08:00 UTCMay 29, 08:20 UTC20m
2026-05-29 CXA851 XMN → SIN May 29, 05:30 UTCMay 29, 05:40 UTC10m
2026-05-27 CXA8536 - May 27, 13:05 UTCMay 28, 07:20 UTC18h 15m
2026-05-27 CXA834 BKK → XMN May 27, 11:05 UTCMay 28, 07:20 UTC20h 15m
2026-05-27 CXA834 BKK → XMN May 27, 10:55 UTCMay 28, 07:20 UTC20h 25m
2026-05-27 CXA833 XMN → BKK May 27, 06:44 UTCMay 27, 09:05 UTC2h 21m
2026-05-26 CXA833 XMN → BKK May 26, 07:05 UTCMay 27, 07:00 UTC23h 56m
2026-05-26 CXA8536 - May 26, 06:49 UTCMay 26, 07:15 UTC25m
2026-05-24 CXA852 SIN → XMN May 24, 08:25 UTCMay 24, 08:50 UTC25m
2026-05-24 CXA851 XMN → SIN May 24, 02:30 UTCMay 24, 05:30 UTC3h 0m
2026-05-22 CXA854 BKK → XMN May 22, 05:35 UTCMay 22, 07:55 UTC2h 20m
2026-05-21 CXA853 XMN → BKK May 21, 10:50 UTCMay 22, 03:55 UTC17h 5m
2026-05-21 CXA833 XMN → BKK May 21, 06:40 UTCMay 21, 09:00 UTC2h 20m
2026-05-18 CXA888 TPE → XMN May 18, 03:40 UTCMay 18, 04:11 UTC30m
2026-05-17 CXA852 SIN → XMN May 17, 08:00 UTCMay 18, 01:45 UTC17h 45m

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

Mode-S 781F7C frequently asked

What is Mode-S code 781F7C?
781F7C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32EK.
Where is Mode-S 781F7C registered?
Mode-S code 781F7C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F7C broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F7C, octal 36017574, decimal 7,872,380.
What flights does 781F7C operate?
Mode-S 781F7C has broadcast 20 distinct callsigns, including CXA852, CXA851, CXA833, CXA853, CXA834.