Apparatus

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sensors Mode-S transponder

7804C4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6378 · AIRBUS A-321

Hex
7804C4
Octal
36002304
Decimal
7,865,540
Country
CN
Tail
B-6378
Type
A321
No current signal · last broadcast 2h ago
Flights observed
120
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7804C4.

Country allocation

The ICAO 24-bit address 7804C4 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
CSN8697 China Southern Airlines 4 2026-05-22
CSN6386 China Southern Airlines 4 2026-04-25
CSN3578 China Southern Airlines 4 2026-06-03
CSN8495 China Southern Airlines 3 2026-05-26
CSN6969 China Southern Airlines 3 2026-06-09
CSN6621 China Southern Airlines 3 2026-06-04
CSN3577 China Southern Airlines 3 2026-06-02
CSN8965 - 2 2026-05-27
CSN8819 China Southern Airlines 2 2026-06-07
CSN8798 China Southern Airlines 2 2026-05-10
CSN8797 China Southern Airlines 2 2026-05-10
CSN8712 China Southern Airlines 2 2026-05-16
CSN8711 China Southern Airlines 2 2026-05-16
CSN8698 China Southern Airlines 2 2026-05-22
CSN8554 China Southern Airlines 2 2026-05-29
CSN8553 China Southern Airlines 2 2026-05-28
CSN6970 China Southern Airlines 2 2026-06-09
CSN6622 China Southern Airlines 2 2026-06-04
CSN6479 China Southern Airlines 2 2026-06-01
CSN6253 China Southern Airlines 2 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-09 CSN6970 NAO → SZX Jun 9, 05:35 UTCJun 9, 05:50 UTC15m
2026-06-09 CSN6969 SZX → NAO Jun 9, 00:35 UTCJun 9, 00:45 UTC10m
2026-06-08 CSN6477 CGO → SZX Jun 8, 12:25 UTCJun 8, 12:50 UTC25m
2026-06-08 CSN6532 SZX → CGO Jun 8, 01:45 UTCJun 8, 02:00 UTC15m
2026-06-07 CSN8819 SZX → KMG Jun 7, 07:45 UTCJun 7, 08:45 UTC1h 0m
2026-06-07 CSN3465 SZX → CKG Jun 7, 00:25 UTCJun 7, 00:39 UTC15m
2026-06-06 CSN3798 HGH → SZX Jun 6, 13:00 UTCJun 6, 13:34 UTC35m
2026-06-06 CSN3797 SZX → HGH Jun 6, 05:35 UTCJun 6, 05:45 UTC10m
2026-06-05 CSN3167 SZX → PKX Jun 5, 06:10 UTCJun 5, 06:25 UTC15m
2026-06-05 CSN6254 HAK → SZX Jun 5, 03:05 UTCJun 5, 03:20 UTC15m
2026-06-05 CSN6253 SZX → HAK Jun 5, 00:10 UTCJun 5, 00:20 UTC10m
2026-06-04 CSN6923 SZX → KMG Jun 4, 10:45 UTCJun 4, 10:55 UTC10m
2026-06-04 CSN6622 XIY → SZX Jun 4, 08:35 UTCJun 4, 08:45 UTC10m
2026-06-04 CSN6621 SZX → XIY Jun 4, 02:20 UTCJun 4, 02:40 UTC20m
2026-06-03 CSN8597 SZX → HGH Jun 3, 05:10 UTCJun 3, 05:20 UTC10m
2026-06-03 CSN3578 NKG → SZX Jun 3, 01:40 UTCJun 3, 02:25 UTC45m
2026-06-02 CSN3577 SZX → NKG Jun 2, 13:30 UTCJun 2, 13:40 UTC10m
2026-06-02 CSN3451 SZX → KMG Jun 2, 06:05 UTCJun 2, 06:50 UTC45m
2026-06-01 CSN3568 SZX → SHA Jun 1, 22:45 UTCJun 1, 22:55 UTC10m
2026-06-01 CSN6479 SZX → HGH Jun 1, 07:00 UTCJun 1, 07:10 UTC10m
2026-06-01 CSN6921 SZX → HIA Jun 1, 00:20 UTCJun 1, 00:30 UTC10m
2026-05-31 CSN6253 SZX → HAK May 31, 00:10 UTCMay 31, 00:30 UTC20m
2026-05-30 CSN6154 NGB → SZX May 30, 15:05 UTCMay 30, 15:40 UTC35m
2026-05-30 CSN3459 SZX → KMG May 30, 02:00 UTCMay 30, 02:50 UTC50m
2026-05-29 CSN3434 CTU → SZX May 29, 18:10 UTCMay 29, 18:20 UTC10m
2026-05-29 CSN3433 SZX → CTU May 29, 10:15 UTCMay 29, 10:25 UTC10m
2026-05-29 CSN6622 XIY → SZX May 29, 08:35 UTCMay 29, 08:45 UTC10m
2026-05-29 CSN6621 SZX → XIY May 29, 02:25 UTCMay 29, 02:40 UTC15m
2026-05-29 CSN8554 LYA → SZX May 29, 00:15 UTCMay 29, 00:35 UTC20m
2026-05-28 CSN8553 SZX → LYA May 28, 14:35 UTCMay 28, 14:50 UTC15m
2026-05-28 CSN3451 SZX → KMG May 28, 06:30 UTCMay 28, 07:30 UTC1h 0m
2026-05-28 CSN3578 NKG → SZX May 28, 01:40 UTCMay 28, 02:30 UTC50m
2026-05-27 CSN8966 - May 27, 10:35 UTCMay 27, 10:45 UTC10m
2026-05-27 CSN8965 - May 27, 04:49 UTCMay 27, 05:04 UTC15m
2026-05-26 CSN8283 SZX → HET May 26, 12:50 UTCMay 26, 13:10 UTC20m
2026-05-26 CSN8495 SZX → XIY May 26, 04:45 UTCMay 26, 04:54 UTC10m
2026-05-26 CSN3578 NKG → SZX May 26, 02:00 UTCMay 26, 02:15 UTC15m
2026-05-25 CSN3577 SZX → NKG May 25, 13:55 UTCMay 25, 14:05 UTC10m
2026-05-25 CSN5844 TAO → SZX May 25, 10:55 UTCMay 25, 11:30 UTC35m
2026-05-25 CSN5843 SZX → TAO May 25, 04:55 UTCMay 25, 05:10 UTC15m
2026-05-25 CSN3578 NKG → SZX May 25, 02:30 UTCMay 25, 02:50 UTC20m
2026-05-24 CSN3577 SZX → NKG May 24, 15:45 UTCMay 24, 16:00 UTC15m
2026-05-24 CSN6480 HGH → SZX May 24, 13:25 UTCMay 24, 14:10 UTC45m
2026-05-24 CSN6479 SZX → HGH May 24, 08:55 UTCMay 24, 09:05 UTC10m
2026-05-24 CSN3465 SZX → CKG May 24, 00:25 UTCMay 24, 00:40 UTC15m
2026-05-23 CSN8495 SZX → XIY May 23, 04:35 UTCMay 23, 04:55 UTC20m
2026-05-23 CSN3642 SYX → CGO May 23, 02:30 UTCMay 23, 02:45 UTC15m
2026-05-22 CSN8698 SYX → SZX May 22, 10:50 UTCMay 22, 11:05 UTC15m
2026-05-22 CSN8697 SZX → DLU May 22, 07:40 UTCMay 22, 07:55 UTC15m
2026-05-22 CSN6969 SZX → NAO May 22, 00:35 UTCMay 22, 00:45 UTC10m

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-6378 page for operator, model, and routing details .

Mode-S 7804C4 frequently asked

What is Mode-S code 7804C4?
7804C4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6378.
Where is Mode-S 7804C4 registered?
Mode-S code 7804C4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7804C4 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7804C4, octal 36002304, decimal 7,865,540.
What flights does 7804C4 operate?
Mode-S 7804C4 has broadcast 20 distinct callsigns, including CSN8697, CSN6386, CSN3578, CSN8495, CSN6969.