sensors Mode-S transponder

781801

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20DX · BOEING 737 MAX 8

Hex
781801
Octal
36014001
Decimal
7,870,465
Country
CN
Tail
B-20DX
Type
B38M
No current signal · last broadcast 41m ago
Flights observed
58
Distinct callsigns
20
Country
CN
Last broadcast
41m ago

Last known position

Most recent position reported by Mode-S 781801.

Country allocation

The ICAO 24-bit address 781801 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
CXA898 Xiamen Airlines 6 2026-04-28
CXA897 Xiamen Airlines 6 2026-04-28
CXA823 Xiamen Airlines 6 2026-05-24
CXA865 Xiamen Airlines 4 2026-04-26
CXA847 Xiamen Airlines 4 2026-05-26
CXA824 Xiamen Airlines 4 2026-05-23
CXA8881 Xiamen Airlines 3 2026-04-15
CXA866 Xiamen Airlines 3 2026-04-26
CXA848 Xiamen Airlines 3 2026-05-26
CXA8882 Xiamen Airlines 2 2026-04-15
CXA8371 Xiamen Airlines 2 2026-04-15
CXA837 - 2 2026-05-07
CXA8317 Xiamen Airlines 2 2026-05-30
CXA892 Xiamen Airlines 1 2026-05-09
CXA8638 - 1 2026-04-16
CXA8550 Xiamen Airlines 1 2026-05-22
CXA854 Xiamen Airlines 1 2026-05-01
CXA853 Xiamen Airlines 1 2026-05-01
CXA8423 Xiamen Airlines 1 2026-05-29
CXA8397 - 1 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CXA8317 SHA → SZX May 30, 09:55 UTCMay 30, 10:05 UTC10m
2026-05-29 CXA8390 SZX → CKG May 29, 17:45 UTCMay 29, 17:55 UTC10m
2026-05-29 CXA8423 XMN → CKG May 29, 07:40 UTCMay 29, 08:00 UTC20m
2026-05-26 CXA848 KUL → XMN May 26, 06:49 UTCMay 26, 07:15 UTC25m
2026-05-26 CXA847 XMN → KUL May 26, 01:34 UTCMay 26, 04:54 UTC3h 20m
2026-05-24 CXA823 XMN → KUL May 24, 12:40 UTCMay 24, 15:55 UTC3h 15m
2026-05-23 CXA824 KUL → XMN May 23, 00:10 UTCMay 23, 03:25 UTC3h 14m
2026-05-22 CXA823 XMN → KUL May 22, 15:20 UTCMay 22, 15:55 UTC35m
2026-05-22 CXA8550 SHA → FOC May 22, 10:05 UTCMay 22, 10:15 UTC10m
2026-05-17 CXA848 KUL → XMN May 17, 07:05 UTCMay 17, 07:30 UTC25m
2026-05-17 CXA847 XMN → KUL May 17, 04:50 UTCMay 17, 05:10 UTC20m
2026-05-17 CXA847 XMN → KUL May 17, 01:45 UTCMay 17, 02:05 UTC20m
2026-05-15 CXA824 KUL → XMN May 15, 00:15 UTCMay 15, 06:55 UTC6h 40m
2026-05-14 CXA823 XMN → KUL May 14, 06:10 UTCMay 14, 15:55 UTC9h 45m
2026-05-13 CXA8397 - May 13, 00:40 UTCMay 13, 04:35 UTC3h 55m
2026-05-11 CXA823 XMN → KUL May 11, 06:00 UTCMay 11, 15:35 UTC9h 35m
2026-05-09 CXA892 DPS → XMN May 9, 05:55 UTCMay 9, 21:05 UTC15h 10m
2026-05-08 CXA848 KUL → XMN May 8, 07:09 UTCMay 9, 05:55 UTC22h 45m
2026-05-08 CXA847 XMN → KUL May 8, 01:40 UTCMay 8, 05:09 UTC3h 30m
2026-05-07 CXA838 - May 7, 16:55 UTCMay 7, 18:20 UTC1h 25m
2026-05-07 CXA837 - May 7, 14:50 UTCMay 7, 15:10 UTC20m
2026-05-07 CXA837 - May 7, 10:45 UTCMay 7, 13:20 UTC2h 35m
2026-05-07 CXA824 KUL → XMN May 7, 00:05 UTCMay 7, 00:30 UTC25m
2026-05-06 CXA823 XMN → KUL May 6, 15:05 UTCMay 6, 15:35 UTC30m
2026-05-05 CXA824 KUL → XMN May 5, 00:05 UTCMay 5, 00:35 UTC30m
2026-05-04 CXA823 XMN → KUL May 4, 15:20 UTCMay 4, 16:00 UTC40m
2026-05-02 CXA8317 SHA → SZX May 2, 09:45 UTCMay 2, 10:05 UTC20m
2026-05-01 CXA854 BKK → XMN May 1, 06:20 UTCMay 1, 08:35 UTC2h 15m
2026-05-01 CXA853 XMN → BKK May 1, 01:45 UTCMay 1, 04:20 UTC2h 35m
2026-04-28 CXA898 KUL → FOC Apr 28, 09:55 UTCApr 28, 10:20 UTC25m
2026-04-28 CXA897 FOC → KUL Apr 28, 07:50 UTCApr 28, 08:25 UTC35m
2026-04-27 CXA898 KUL → FOC Apr 27, 11:25 UTCApr 27, 11:55 UTC30m
2026-04-27 CXA897 FOC → KUL Apr 27, 05:30 UTCApr 27, 09:35 UTC4h 5m
2026-04-26 CXA866 SIN → FOC Apr 26, 08:50 UTCApr 27, 08:15 UTC23h 25m
2026-04-26 CXA866 SIN → FOC Apr 26, 07:30 UTCApr 27, 05:30 UTC22h 0m
2026-04-26 CXA865 FOC → SIN Apr 26, 05:25 UTCApr 26, 06:00 UTC35m
2026-04-25 CXA865 FOC → SIN Apr 25, 10:20 UTCApr 26, 04:35 UTC18h 15m
2026-04-25 CXA898 KUL → FOC Apr 25, 09:55 UTCApr 26, 04:35 UTC18h 40m
2026-04-24 CXA897 FOC → KUL Apr 24, 14:20 UTCApr 25, 08:45 UTC18h 25m
2026-04-24 CXA897 FOC → KUL Apr 24, 11:30 UTCApr 25, 08:45 UTC21h 15m
2026-04-22 CXA898 KUL → FOC Apr 22, 09:45 UTCApr 22, 11:10 UTC1h 25m
2026-04-22 CXA897 FOC → KUL Apr 22, 06:40 UTCApr 22, 08:10 UTC1h 30m
2026-04-21 CXA866 SIN → FOC Apr 21, 08:20 UTCApr 21, 09:35 UTC1h 15m
2026-04-21 CXA865 FOC → SIN Apr 21, 03:00 UTCApr 21, 06:40 UTC3h 40m
2026-04-21 CXA865 FOC → SIN Apr 21, 02:10 UTCApr 21, 02:20 UTC10m
2026-04-20 CXA898 KUL → FOC Apr 20, 15:10 UTCApr 20, 15:40 UTC30m
2026-04-20 CXA898 KUL → FOC Apr 20, 11:50 UTCApr 20, 13:15 UTC1h 25m
2026-04-20 CXA897 FOC → KUL Apr 20, 08:30 UTCApr 20, 10:00 UTC1h 30m
2026-04-19 CXA8363 FOC → NNG Apr 19, 00:15 UTCApr 19, 04:15 UTC4h 0m
2026-04-16 CXA8638 - Apr 16, 15:25 UTCApr 16, 16:00 UTC35m

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-20DX page for operator, model, and routing details .

Mode-S 781801 frequently asked

What is Mode-S code 781801?
781801 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20DX.
Where is Mode-S 781801 registered?
Mode-S code 781801 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781801 broadcasting right now?
No active broadcast right now. Last signal was 41m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781801, octal 36014001, decimal 7,870,465.
What flights does 781801 operate?
Mode-S 781801 has broadcast 20 distinct callsigns, including CXA898, CXA897, CXA823, CXA865, CXA847.