Apparatus

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sensors Mode-S transponder

7804C9

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-8849 · AIRBUS A-321

Hex
7804C9
Octal
36002311
Decimal
7,865,545
Country
CN
Tail
B-8849
Type
A321
No current signal · last broadcast 15d ago
Flights observed
67
Distinct callsigns
16
Country
CN
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S 7804C9.

Country allocation

The ICAO 24-bit address 7804C9 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 16 distinct

Callsign Airline Flights Last seen
CSN6509 China Southern Airlines 16 2026-07-22
CSN6543 China Southern Airlines 8 2026-07-23
CSN6515 China Southern Airlines 8 2026-07-21
CSN5872 China Southern Airlines 8 2026-07-26
CSN6437 China Southern Airlines 4 2026-07-24
CSN369 - 4 2026-06-19
CSN6373 - 3 2026-07-06
CSN6209 - 3 2026-07-08
CSN370 - 3 2026-06-19
CSN3836 China Southern Airlines 2 2026-05-16
CSN314 China Southern Airlines 2 2026-05-10
CSN313 China Southern Airlines 2 2026-05-10
CSN6374 China Southern Airlines 1 2026-07-22
CSN6103 China Southern Airlines 1 2026-07-25
CSN3835 China Southern Airlines 1 2026-05-17
CSN3550 China Southern Airlines 1 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN5872 PVG → CGQ Jul 26, 10:55 UTCJul 26, 11:30 UTC35m
2026-07-25 CSN6103 PKX → CTU Jul 25, 05:25 UTCJul 25, 05:40 UTC15m
2026-07-24 CSN6437 SYX → HGH Jul 24, 06:00 UTCJul 24, 14:50 UTC8h 50m
2026-07-23 CSN6543 CGQ → PVG Jul 23, 14:20 UTCJul 24, 14:15 UTC23h 55m
2026-07-23 CSN6437 - Jul 23, 13:45 UTCJul 24, 06:40 UTC16h 55m
2026-07-23 CSN6437 - Jul 23, 01:10 UTCJul 23, 14:30 UTC13h 20m
2026-07-22 CSN6374 PVG → CGQ Jul 22, 14:20 UTCJul 23, 14:15 UTC23h 55m
2026-07-22 CSN6509 SHE → PVG Jul 22, 14:05 UTCJul 23, 05:05 UTC15h 0m
2026-07-22 CSN6509 SHE → PVG Jul 22, 05:00 UTCJul 23, 01:35 UTC20h 35m
2026-07-21 CSN6515 SHE → PVG Jul 21, 13:10 UTCJul 22, 05:25 UTC16h 15m
2026-07-21 CSN6515 SHE → PVG Jul 21, 05:00 UTCJul 21, 13:35 UTC8h 35m
2026-07-19 CSN6509 SHE → PVG Jul 19, 14:50 UTCJul 20, 05:10 UTC14h 20m
2026-07-19 CSN6509 SHE → PVG Jul 19, 08:00 UTCJul 20, 05:10 UTC21h 10m
2026-07-17 CSN6509 - Jul 17, 12:40 UTCJul 18, 05:35 UTC16h 56m
2026-07-17 CSN6543 CGQ → PVG Jul 17, 04:10 UTCJul 17, 13:10 UTC9h 0m
2026-07-16 CSN6543 CGQ → PVG Jul 16, 10:55 UTCJul 17, 04:59 UTC18h 5m
2026-07-15 CSN5872 - Jul 15, 13:05 UTCJul 16, 11:34 UTC22h 30m
2026-07-15 CSN6509 - Jul 15, 09:15 UTCJul 15, 13:20 UTC4h 5m
2026-07-14 CSN5872 - Jul 14, 11:05 UTCJul 15, 09:15 UTC22h 9m
2026-07-13 CSN5872 - Jul 13, 14:45 UTCJul 14, 11:45 UTC21h 0m
2026-07-09 CSN5872 - Jul 9, 13:10 UTCJul 10, 05:15 UTC16h 5m
2026-07-08 CSN6209 - Jul 8, 06:15 UTCJul 8, 07:05 UTC50m
2026-07-06 CSN6373 - Jul 6, 05:15 UTCJul 6, 15:25 UTC10h 10m
2026-07-05 CSN6509 - Jul 5, 14:20 UTCJul 6, 05:15 UTC14h 55m
2026-07-05 CSN6515 - Jul 5, 04:55 UTCJul 5, 14:25 UTC9h 30m
2026-07-04 CSN6515 - Jul 4, 16:00 UTCJul 5, 05:10 UTC13h 10m
2026-07-04 CSN6515 - Jul 4, 06:55 UTCJul 5, 05:10 UTC22h 15m
2026-07-03 CSN6509 - Jul 3, 16:55 UTCJul 4, 16:10 UTC23h 15m
2026-07-02 CSN6543 - Jul 2, 04:20 UTCJul 2, 12:55 UTC8h 35m
2026-07-01 CSN6543 - Jul 1, 12:55 UTCJul 2, 05:05 UTC16h 10m
2026-06-29 CSN6373 - Jun 29, 12:34 UTCJun 30, 05:15 UTC16h 41m
2026-06-27 CSN6543 - Jun 27, 13:49 UTCJun 28, 04:40 UTC14h 50m
2026-06-26 CSN6437 - Jun 26, 04:10 UTCJun 26, 13:30 UTC9h 20m
2026-06-23 CSN6509 - Jun 23, 04:45 UTCJun 23, 13:05 UTC8h 20m
2026-06-22 CSN6515 - Jun 22, 14:10 UTCJun 23, 04:55 UTC14h 45m
2026-06-22 CSN6543 - Jun 22, 04:15 UTCJun 22, 14:10 UTC9h 55m
2026-06-21 CSN6509 - Jun 21, 12:49 UTCJun 22, 04:24 UTC15h 35m
2026-06-20 CSN6373 - Jun 20, 12:24 UTCJun 20, 13:09 UTC45m
2026-06-19 CSN370 - Jun 19, 12:34 UTCJun 19, 12:59 UTC25m
2026-06-19 CSN369 - Jun 19, 04:54 UTCJun 19, 10:29 UTC5h 35m
2026-06-18 CSN369 - Jun 18, 12:50 UTCJun 19, 10:29 UTC21h 39m
2026-06-16 CSN370 ICN → PVG Jun 16, 12:39 UTCJun 16, 13:00 UTC20m
2026-06-16 CSN369 - Jun 16, 09:50 UTCJun 16, 10:35 UTC45m
2026-06-13 CSN6509 SHE → PVG Jun 13, 12:45 UTCJun 14, 05:00 UTC16h 15m
2026-06-13 CSN6509 SHE → PVG Jun 13, 05:00 UTCJun 13, 12:55 UTC7h 55m
2026-06-08 CSN6515 SHE → PVG Jun 8, 04:40 UTCJun 8, 12:50 UTC8h 10m
2026-06-07 CSN6515 SHE → PVG Jun 7, 12:40 UTCJun 8, 04:45 UTC16h 5m
2026-06-04 CSN6209 HRB → PVG Jun 4, 04:20 UTCJun 4, 13:45 UTC9h 25m
2026-06-03 CSN6509 SHE → PVG Jun 3, 14:25 UTCJun 4, 13:45 UTC23h 20m
2026-06-03 CSN6543 CGQ → PVG Jun 3, 04:10 UTCJun 3, 14:25 UTC10h 15m

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-8849 page for operator, model, and routing details .

Mode-S 7804C9 frequently asked

What is Mode-S code 7804C9?
7804C9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-8849.
Where is Mode-S 7804C9 registered?
Mode-S code 7804C9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7804C9 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7804C9, octal 36002311, decimal 7,865,545.
What flights does 7804C9 operate?
Mode-S 7804C9 has broadcast 16 distinct callsigns, including CSN6509, CSN6543, CSN6515, CSN5872, CSN6437.