Apparatus

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sensors Mode-S transponder

7817FE

ICAO 24-bit transponder address · allocated to China

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

Hex
7817FE
Octal
36013776
Decimal
7,870,462
Country
CN
Tail
B-20DU
Type
B38M
No current signal · last broadcast 2d ago
Flights observed
134
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 7817FE.

Country allocation

The ICAO 24-bit address 7817FE 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
CXA897 - 12 2026-06-28
CXA868 - 10 2026-07-06
CXA898 - 9 2026-06-28
CXA867 - 9 2026-07-06
CXA848 Xiamen Airlines 9 2026-06-05
CXA847 Xiamen Airlines 9 2026-06-05
CXA892 - 7 2026-07-10
CXA837 - 7 2026-07-01
CXA838 - 6 2026-07-01
CXA866 - 5 2026-06-29
CXA865 - 5 2026-06-29
CXA8371 Xiamen Airlines 5 2026-05-04
CXA8882 Xiamen Airlines 4 2026-04-23
CXA8429 - 4 2026-06-24
CXA824 - 4 2026-07-04
CXA823 - 4 2026-07-02
CXA8881 Xiamen Airlines 3 2026-04-22
CXA8372 Xiamen Airlines 3 2026-04-23
CXA8032 - 3 2026-07-10
CXA8705 Xiamen Airlines 2 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 CXA852 - Jul 11, 07:45 UTCJul 11, 08:15 UTC30m
2026-07-10 CXA892 - Jul 10, 12:25 UTCJul 11, 05:50 UTC17h 25m
2026-07-10 CXA892 - Jul 10, 10:10 UTCJul 11, 05:50 UTC19h 41m
2026-07-10 CXA8032 - Jul 10, 00:50 UTCJul 10, 08:00 UTC7h 10m
2026-07-09 CXA834 - Jul 9, 10:55 UTCJul 9, 13:15 UTC2h 20m
2026-07-09 CXA833 - Jul 9, 00:20 UTCJul 9, 09:15 UTC8h 55m
2026-07-08 CXA8415 - Jul 8, 06:30 UTCJul 8, 18:00 UTC11h 30m
2026-07-07 CXA8415 - Jul 7, 10:55 UTCJul 8, 07:30 UTC20h 35m
2026-07-06 CXA868 - Jul 6, 07:05 UTCJul 6, 11:50 UTC4h 45m
2026-07-06 CXA867 - Jul 6, 04:45 UTCJul 6, 05:00 UTC15m
2026-07-06 CXA867 - Jul 6, 02:25 UTCJul 6, 03:10 UTC45m
2026-07-04 CXA8828 - Jul 4, 17:20 UTCJul 4, 17:30 UTC10m
2026-07-04 CXA8827 - Jul 4, 15:45 UTCJul 4, 16:05 UTC20m
2026-07-04 CXA824 - Jul 4, 00:15 UTCJul 4, 00:40 UTC25m
2026-07-03 CXA8716 - Jul 3, 03:30 UTCJul 3, 18:20 UTC14h 50m
2026-07-02 CXA823 - Jul 2, 06:00 UTCJul 2, 15:50 UTC9h 50m
2026-07-01 CXA838 - Jul 1, 16:45 UTCJul 1, 18:15 UTC1h 30m
2026-07-01 CXA837 - Jul 1, 14:55 UTCJul 1, 15:10 UTC15m
2026-07-01 CXA837 - Jul 1, 06:00 UTCJul 1, 13:30 UTC7h 30m
2026-06-30 CXA892 - Jun 30, 10:35 UTCJun 30, 21:05 UTC10h 30m
2026-06-29 CXA866 - Jun 29, 07:40 UTCJun 29, 08:09 UTC30m
2026-06-29 CXA865 - Jun 29, 02:45 UTCJun 29, 05:59 UTC3h 15m
2026-06-28 CXA898 - Jun 28, 09:50 UTCJun 28, 13:34 UTC3h 45m
2026-06-28 CXA897 - Jun 28, 04:15 UTCJun 28, 08:19 UTC4h 5m
2026-06-27 CXA898 - Jun 27, 10:00 UTCJun 27, 10:29 UTC30m
2026-06-27 CXA897 - Jun 27, 05:15 UTCJun 27, 08:29 UTC3h 15m
2026-06-26 CXA898 - Jun 26, 10:05 UTCJun 26, 10:35 UTC30m
2026-06-26 CXA897 - Jun 26, 04:20 UTCJun 26, 08:10 UTC3h 50m
2026-06-24 CXA8429 - Jun 24, 00:40 UTCJun 24, 14:00 UTC13h 20m
2026-06-23 CXA8429 - Jun 23, 14:10 UTCJun 24, 06:10 UTC16h 0m
2026-06-23 CXA8429 - Jun 23, 09:34 UTCJun 24, 06:10 UTC20h 35m
2026-06-23 CXA8425 - Jun 23, 08:35 UTCJun 24, 06:10 UTC21h 35m
2026-06-23 CXA8425 - Jun 23, 01:35 UTCJun 24, 01:30 UTC23h 55m
2026-06-23 CXA8429 - Jun 23, 00:19 UTCJun 23, 14:10 UTC13h 50m
2026-06-21 CXA866 - Jun 21, 07:40 UTCJun 21, 10:49 UTC3h 10m
2026-06-21 CXA865 - Jun 21, 05:30 UTCJun 21, 05:49 UTC20m
2026-06-20 CXA898 - Jun 20, 09:49 UTCJun 20, 10:20 UTC30m
2026-06-20 CXA897 - Jun 20, 04:24 UTCJun 20, 08:19 UTC3h 55m
2026-06-19 CXA897 - Jun 19, 09:55 UTCJun 20, 08:19 UTC22h 25m
2026-06-19 CXA897 - Jun 19, 07:25 UTCJun 19, 08:04 UTC40m
2026-06-18 CXA866 - Jun 18, 08:25 UTCJun 18, 08:55 UTC30m
2026-06-18 CXA865 - Jun 18, 06:05 UTCJun 18, 06:20 UTC15m
2026-06-15 CXA866 - Jun 15, 08:45 UTCJun 15, 09:15 UTC30m
2026-06-15 CXA865 - Jun 15, 05:20 UTCJun 15, 05:45 UTC25m
2026-06-14 CXA898 - Jun 14, 10:10 UTCJun 14, 10:40 UTC30m
2026-06-14 CXA897 - Jun 14, 05:10 UTCJun 14, 08:35 UTC3h 25m
2026-06-13 CXA898 KUL → FOC Jun 13, 10:05 UTCJun 13, 10:30 UTC25m
2026-06-13 CXA897 - Jun 13, 07:30 UTCJun 13, 08:15 UTC45m
2026-06-07 CXA866 SIN → FOC Jun 7, 07:35 UTCJun 7, 11:05 UTC3h 30m
2026-06-07 CXA865 FOC → SIN Jun 7, 02:25 UTCJun 7, 05:45 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-20DU page for operator, model, and routing details .

Mode-S 7817FE frequently asked

What is Mode-S code 7817FE?
7817FE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20DU.
Where is Mode-S 7817FE registered?
Mode-S code 7817FE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817FE 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 7817FE, octal 36013776, decimal 7,870,462.
What flights does 7817FE operate?
Mode-S 7817FE has broadcast 20 distinct callsigns, including CXA897, CXA868, CXA898, CXA867, CXA848.