Apparatus

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sensors Mode-S transponder

7809FD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6979 · AIRBUS A-321

Hex
7809FD
Octal
36004775
Decimal
7,866,877
Country
CN
Tail
B-6979
Type
A321
No current signal · last broadcast 2h ago
Flights observed
142
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7809FD.

Country allocation

The ICAO 24-bit address 7809FD 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
CSN8324 China Southern Airlines 7 2026-05-20
CSN8323 China Southern Airlines 7 2026-05-20
CSN8738 China Southern Airlines 5 2026-05-14
CSN3155 China Southern Airlines 5 2026-05-28
CSN8083 China Southern Airlines 4 2026-05-28
CSN6480 China Southern Airlines 4 2026-05-19
CSN8465 China Southern Airlines 3 2026-05-30
CSN8284 China Southern Airlines 3 2026-05-24
CSN8283 China Southern Airlines 3 2026-05-27
CSN8084 China Southern Airlines 3 2026-05-28
CSN8075 China Southern Airlines 3 2026-05-18
CSN3351 - 3 2026-05-19
CSN8757 China Southern Airlines 2 2026-04-23
CSN8736 China Southern Airlines 2 2026-05-27
CSN8735 China Southern Airlines 2 2026-05-27
CSN8466 China Southern Airlines 2 2026-05-30
CSN8076 China Southern Airlines 2 2026-05-18
CSN6479 China Southern Airlines 2 2026-05-19
CSN6385 China Southern Airlines 2 2026-04-20
CSN3583 China Southern Airlines 2 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN8466 SGN → SZX May 30, 10:45 UTCMay 30, 11:00 UTC15m
2026-05-30 CSN8466 SGN → SZX May 30, 10:00 UTCMay 30, 10:15 UTC15m
2026-05-30 CSN8465 SZX → SGN May 30, 05:15 UTCMay 30, 05:25 UTC10m
2026-05-29 CSN3977 SYX → SZX May 29, 23:50 UTCMay 30, 00:05 UTC15m
2026-05-28 CSN3155 SZX → PEK May 28, 11:45 UTCMay 28, 12:05 UTC20m
2026-05-28 CSN8084 HAN → SZX May 28, 07:55 UTCMay 28, 08:20 UTC25m
2026-05-28 CSN8083 SZX → HAN May 28, 04:55 UTCMay 28, 06:15 UTC1h 20m
2026-05-27 CSN8283 SZX → HET May 27, 12:35 UTCMay 27, 12:45 UTC10m
2026-05-27 CSN8736 TAO → SZX May 27, 08:05 UTCMay 27, 08:25 UTC20m
2026-05-27 CSN8735 SZX → TAO May 27, 00:55 UTCMay 27, 01:05 UTC10m
2026-05-25 CSN3191 SZX → PEK May 25, 09:40 UTCMay 25, 09:55 UTC15m
2026-05-25 CSN3459 SZX → KMG May 25, 03:10 UTCMay 25, 03:25 UTC15m
2026-05-24 CSN3172 PKX → SZX May 24, 12:00 UTCMay 24, 12:10 UTC10m
2026-05-24 CSN3169 SZX → PKX May 24, 03:50 UTCMay 24, 04:05 UTC15m
2026-05-24 CSN8284 HET → SZX May 24, 02:05 UTCMay 24, 02:20 UTC15m
2026-05-23 CSN8084 HAN → SZX May 23, 09:00 UTCMay 23, 09:20 UTC20m
2026-05-23 CSN8083 SZX → HAN May 23, 04:55 UTCMay 23, 05:10 UTC15m
2026-05-23 CSN8284 HET → SZX May 23, 02:15 UTCMay 23, 02:35 UTC19m
2026-05-22 CSN8283 SZX → HET May 22, 13:05 UTCMay 22, 13:15 UTC10m
2026-05-22 CSN5819 SZX → TSN May 22, 02:00 UTCMay 22, 02:10 UTC10m
2026-05-21 CSN5919 SZX → CKG May 21, 13:10 UTCMay 21, 13:25 UTC15m
2026-05-21 CSN8465 SZX → SGN May 21, 05:40 UTCMay 21, 05:50 UTC10m
2026-05-21 CSN8596 HFE → SZX May 21, 00:40 UTCMay 21, 00:50 UTC10m
2026-05-20 CSN8595 SZX → HFE May 20, 19:25 UTCMay 20, 19:35 UTC10m
2026-05-20 CSN8324 BKK → SZX May 20, 17:15 UTCMay 20, 17:25 UTC10m
2026-05-20 CSN8324 BKK → SZX May 20, 10:35 UTCMay 20, 11:00 UTC25m
2026-05-20 CSN8323 SZX → BKK May 20, 08:10 UTCMay 20, 08:40 UTC30m
2026-05-20 CSN8323 SZX → BKK May 20, 06:25 UTCMay 20, 06:45 UTC20m
2026-05-19 CSN3351 - May 19, 23:05 UTCMay 19, 23:15 UTC10m
2026-05-19 CSN6480 HGH → SZX May 19, 13:30 UTCMay 19, 13:50 UTC20m
2026-05-19 CSN6479 SZX → HGH May 19, 07:20 UTCMay 19, 07:30 UTC10m
2026-05-18 CSN3405 CAN → CKG May 18, 23:35 UTCMay 18, 23:45 UTC10m
2026-05-18 CSN3964 TAO → SZX May 18, 16:10 UTCMay 18, 16:30 UTC20m
2026-05-18 CSN3963 SZX → TAO May 18, 09:20 UTCMay 18, 09:35 UTC15m
2026-05-18 CSN8076 BKK → SZX May 18, 05:30 UTCMay 18, 05:50 UTC20m
2026-05-18 CSN8075 SZX → BKK May 18, 03:25 UTCMay 18, 03:55 UTC30m
2026-05-18 CSN8075 SZX → BKK May 18, 01:35 UTCMay 18, 01:50 UTC15m
2026-05-17 CSN3557 SZX → PVG May 17, 07:20 UTCMay 17, 07:30 UTC10m
2026-05-17 CSN6921 SZX → HIA May 17, 00:20 UTCMay 17, 00:30 UTC10m
2026-05-16 CSN8324 BKK → SZX May 16, 10:31 UTCMay 16, 11:05 UTC35m
2026-05-16 CSN8323 SZX → BKK May 16, 07:51 UTCMay 16, 08:41 UTC50m
2026-05-16 CSN8323 SZX → BKK May 16, 06:16 UTCMay 16, 06:31 UTC15m
2026-05-16 CSN3366 HGH → SZX May 16, 01:55 UTCMay 16, 02:10 UTC15m
2026-05-15 CSN3365 SZX → HGH May 15, 16:15 UTCMay 15, 16:25 UTC10m
2026-05-14 CSN3155 SZX → PEK May 14, 11:55 UTCMay 14, 12:10 UTC15m
2026-05-14 CSN8465 SZX → SGN May 14, 04:00 UTCMay 14, 04:10 UTC10m
2026-05-14 CSN8738 NGB → SZX May 14, 02:05 UTCMay 14, 02:15 UTC10m
2026-05-13 CSN8698 SYX → SZX May 13, 11:05 UTCMay 13, 11:20 UTC15m
2026-05-13 CSN8697 SZX → DLU May 13, 07:50 UTCMay 13, 08:05 UTC15m
2026-05-13 CSN3570 HGH → SZX May 13, 05:15 UTCMay 13, 06:10 UTC55m

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-6979 page for operator, model, and routing details .

Mode-S 7809FD frequently asked

What is Mode-S code 7809FD?
7809FD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6979.
Where is Mode-S 7809FD registered?
Mode-S code 7809FD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7809FD 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 7809FD, octal 36004775, decimal 7,866,877.
What flights does 7809FD operate?
Mode-S 7809FD has broadcast 20 distinct callsigns, including CSN8324, CSN8323, CSN8738, CSN3155, CSN8083.