Apparatus

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sensors Mode-S transponder

7821C6

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-226Z · BOEING 737 MAX 8

Hex
7821C6
Octal
36020706
Decimal
7,872,966
Country
CN
Tail
B-226Z
Type
B38M
No current signal · last broadcast 22h ago
Flights observed
126
Distinct callsigns
20
Country
CN
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S 7821C6.

Country allocation

The ICAO 24-bit address 7821C6 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 2026-06-17
CXA898 - 11 2026-06-17
CXA837 - 8 2026-07-07
CXA867 - 7 2026-07-02
CXA848 - 7 2026-06-26
CXA838 - 7 2026-07-07
CXA824 - 7 2026-07-12
CXA823 - 7 2026-07-10
CXA892 - 6 2026-06-29
CXA868 - 6 2026-07-02
CXA866 Xiamen Airlines 5 2026-06-13
CXA865 - 5 2026-06-13
CXA847 - 4 2026-06-26
CXA8706 - 3 2026-06-20
CXA853 Xiamen Airlines 3 2026-05-23
CXA8716 - 2 2026-07-11
CXA8705 Xiamen Airlines 2 2026-05-20
CXA854 Xiamen Airlines 2 2026-05-23
CXA834 - 2 2026-07-12
CXA8032 Xiamen Airlines 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CXA8517 - Jul 13, 13:30 UTCJul 13, 13:45 UTC15m
2026-07-13 CXA852 - Jul 13, 07:30 UTCJul 13, 07:55 UTC25m
2026-07-13 CXA851 - Jul 13, 02:01 UTCJul 13, 05:40 UTC3h 40m
2026-07-12 CXA834 - Jul 12, 12:55 UTCJul 12, 13:10 UTC15m
2026-07-12 CXA834 - Jul 12, 10:50 UTCJul 12, 11:05 UTC15m
2026-07-12 CXA833 - Jul 12, 09:00 UTCJul 12, 09:15 UTC15m
2026-07-12 CXA824 - Jul 12, 00:05 UTCJul 12, 07:10 UTC7h 5m
2026-07-11 CXA8716 - Jul 11, 03:01 UTCJul 11, 15:25 UTC12h 25m
2026-07-10 CXA823 - Jul 10, 15:20 UTCJul 10, 15:50 UTC30m
2026-07-10 CXA8416 - Jul 10, 09:40 UTCJul 10, 09:50 UTC10m
2026-07-07 CXA838 - Jul 7, 17:50 UTCJul 7, 22:00 UTC4h 10m
2026-07-07 CXA837 - Jul 7, 16:15 UTCJul 7, 16:30 UTC15m
2026-07-07 CXA837 - Jul 7, 00:15 UTCJul 7, 14:45 UTC14h 30m
2026-07-06 CXA823 - Jul 6, 15:10 UTCJul 6, 15:45 UTC35m
2026-07-04 CXA824 - Jul 4, 23:55 UTCJul 5, 23:30 UTC23h 35m
2026-07-04 CXA8716 - Jul 4, 03:00 UTCJul 4, 15:20 UTC12h 20m
2026-07-03 CXA823 - Jul 3, 10:55 UTCJul 3, 17:30 UTC6h 35m
2026-07-02 CXA868 - Jul 2, 07:00 UTCJul 2, 08:30 UTC1h 30m
2026-07-02 CXA867 - Jul 2, 04:35 UTCJul 2, 04:55 UTC20m
2026-07-02 CXA867 - Jul 2, 00:50 UTCJul 2, 03:10 UTC2h 20m
2026-06-29 CXA892 - Jun 29, 12:39 UTCJun 29, 21:14 UTC8h 35m
2026-06-28 CXA892 - Jun 28, 12:25 UTCJun 28, 21:24 UTC9h 0m
2026-06-26 CXA848 - Jun 26, 06:45 UTCJun 26, 13:45 UTC7h 0m
2026-06-26 CXA847 - Jun 26, 01:50 UTCJun 26, 05:10 UTC3h 20m
2026-06-25 CXA892 - Jun 25, 12:19 UTCJun 25, 21:25 UTC9h 5m
2026-06-24 CXA848 - Jun 24, 07:10 UTCJun 24, 07:40 UTC30m
2026-06-24 CXA847 - Jun 24, 02:15 UTCJun 24, 05:40 UTC3h 25m
2026-06-22 CXA8405 - Jun 22, 00:40 UTCJun 22, 13:59 UTC13h 20m
2026-06-20 CXA8706 - Jun 20, 11:20 UTCJun 20, 11:30 UTC10m
2026-06-18 CXA8882 - Jun 18, 17:40 UTCJun 18, 17:55 UTC15m
2026-06-18 CXA8022 - Jun 18, 10:15 UTCJun 18, 10:30 UTC15m
2026-06-17 CXA898 - Jun 17, 10:30 UTCJun 17, 10:55 UTC25m
2026-06-17 CXA897 - Jun 17, 04:30 UTCJun 17, 08:45 UTC4h 15m
2026-06-16 CXA898 - Jun 16, 13:40 UTCJun 16, 14:09 UTC30m
2026-06-16 CXA898 - Jun 16, 10:04 UTCJun 16, 10:30 UTC25m
2026-06-16 CXA897 - Jun 16, 07:34 UTCJun 16, 08:15 UTC40m
2026-06-15 CXA897 - Jun 15, 10:15 UTCJun 16, 08:15 UTC22h 0m
2026-06-15 CXA897 - Jun 15, 04:50 UTCJun 15, 08:49 UTC4h 0m
2026-06-13 CXA866 SIN → FOC Jun 13, 07:35 UTCJun 13, 08:00 UTC25m
2026-06-13 CXA865 - Jun 13, 02:45 UTCJun 13, 05:35 UTC2h 49m
2026-06-12 CXA898 KUL → FOC Jun 12, 09:45 UTCJun 13, 05:35 UTC19h 49m
2026-06-12 CXA897 - Jun 12, 04:05 UTCJun 12, 08:10 UTC4h 5m
2026-06-11 - - Jun 11, 13:45 UTCJun 11, 14:10 UTC25m
2026-06-11 CXA898 KUL → FOC Jun 11, 10:05 UTCJun 11, 10:35 UTC30m
2026-06-11 CXA897 FOC → KUL Jun 11, 07:45 UTCJun 11, 08:25 UTC40m
2026-06-10 CXA898 KUL → FOC Jun 10, 10:05 UTCJun 10, 10:35 UTC30m
2026-06-10 CXA897 FOC → KUL Jun 10, 08:00 UTCJun 10, 08:30 UTC30m
2026-06-06 CXA898 KUL → FOC Jun 6, 13:30 UTCJun 6, 14:14 UTC45m
2026-06-06 CXA898 KUL → FOC Jun 6, 10:09 UTCJun 6, 10:34 UTC25m
2026-06-06 CXA897 FOC → KUL Jun 6, 08:00 UTCJun 6, 08:35 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-226Z page for operator, model, and routing details .

Mode-S 7821C6 frequently asked

What is Mode-S code 7821C6?
7821C6 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-226Z.
Where is Mode-S 7821C6 registered?
Mode-S code 7821C6 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7821C6 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7821C6, octal 36020706, decimal 7,872,966.
What flights does 7821C6 operate?
Mode-S 7821C6 has broadcast 20 distinct callsigns, including CXA897, CXA898, CXA837, CXA867, CXA848.