Apparatus

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sensors Mode-S transponder

7809B1

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6976 · AIRBUS A-320

Hex
7809B1
Octal
36004661
Decimal
7,866,801
Country
CN
Tail
B-6976
Type
A320
No current signal · last broadcast 6h ago
Flights observed
160
Distinct callsigns
20
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7809B1.

Country allocation

The ICAO 24-bit address 7809B1 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
CSN5150 China Southern Airlines 7 2026-05-23
CSN5149 China Southern Airlines 7 2026-05-23
CSN8612 China Southern Airlines 5 2026-05-28
CSN8611 China Southern Airlines 5 2026-05-28
CSN3323 China Southern Airlines 5 2026-05-15
CSN8676 China Southern Airlines 4 2026-05-01
CSN8675 China Southern Airlines 4 2026-05-01
CSN6756 China Southern Airlines 4 2026-05-15
CSN5400 China Southern Airlines 4 2026-05-24
CSN8678 China Southern Airlines 3 2026-05-29
CSN8677 China Southern Airlines 3 2026-05-29
CSN8576 China Southern Airlines 3 2026-05-20
CSN8478 China Southern Airlines 3 2026-05-25
CSN8477 China Southern Airlines 3 2026-05-25
CSN6969 China Southern Airlines 3 2026-05-30
CSN6755 China Southern Airlines 3 2026-05-15
CSN5755 China Southern Airlines 3 2026-05-12
CSN3451 China Southern Airlines 3 2026-05-09
CSN8575 China Southern Airlines 2 2026-05-20
CSN8553 China Southern Airlines 2 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN6549 SZX → NAO May 30, 14:10 UTCMay 30, 14:25 UTC15m
2026-05-30 CSN8819 SZX → KMG May 30, 07:25 UTCMay 30, 08:20 UTC55m
2026-05-30 CSN6969 SZX → NAO May 30, 00:35 UTCMay 30, 00:50 UTC15m
2026-05-29 CSN3210 WUX → SZX May 29, 15:35 UTCMay 29, 16:40 UTC1h 5m
2026-05-29 CSN3209 SZX → WUX May 29, 08:15 UTCMay 29, 08:25 UTC10m
2026-05-29 CSN8678 ENY → SZX May 29, 06:40 UTCMay 29, 06:50 UTC10m
2026-05-29 CSN8677 SZX → ENY May 29, 00:35 UTCMay 29, 00:55 UTC20m
2026-05-28 CSN8612 JHG → SZX May 28, 15:50 UTCMay 28, 16:00 UTC10m
2026-05-28 CSN8611 SZX → JHG May 28, 10:25 UTCMay 28, 11:30 UTC1h 5m
2026-05-28 CSN6752 PVG → SZX May 28, 06:35 UTCMay 28, 07:40 UTC1h 5m
2026-05-28 CSN6751 SZX → PVG May 28, 01:50 UTCMay 28, 02:05 UTC15m
2026-05-27 CSN6480 HGH → SZX May 27, 12:00 UTCMay 27, 12:30 UTC30m
2026-05-27 CSN6969 SZX → NAO May 27, 00:25 UTCMay 27, 00:39 UTC15m
2026-05-26 CSN3271 SZX → CGO May 26, 07:55 UTCMay 26, 08:04 UTC10m
2026-05-26 CSN6970 NAO → SZX May 26, 05:49 UTCMay 26, 05:59 UTC10m
2026-05-26 CSN6969 SZX → NAO May 26, 00:35 UTCMay 26, 00:44 UTC10m
2026-05-25 CSN8612 JHG → SZX May 25, 15:35 UTCMay 25, 15:50 UTC15m
2026-05-25 CSN8611 SZX → JHG May 25, 10:35 UTCMay 25, 10:50 UTC15m
2026-05-25 CSN8478 TFU → SZX May 25, 08:20 UTCMay 25, 08:30 UTC10m
2026-05-25 CSN8477 SZX → TFU May 25, 02:50 UTCMay 25, 03:05 UTC15m
2026-05-24 CSN8587 - May 24, 13:55 UTCMay 24, 14:05 UTC10m
2026-05-24 CSN5400 NKG → SZX May 24, 12:20 UTCMay 24, 12:50 UTC30m
2026-05-24 CSN5399 SZX → NKG May 24, 06:50 UTCMay 24, 07:10 UTC20m
2026-05-23 CSN8165 - May 23, 22:50 UTCMay 23, 23:00 UTC10m
2026-05-23 CSN3828 NKG → SZX May 23, 11:30 UTCMay 23, 12:15 UTC45m
2026-05-23 CSN3827 SZX → NKG May 23, 07:10 UTCMay 23, 07:20 UTC10m
2026-05-23 CSN5150 DLU → SZX May 23, 05:35 UTCMay 23, 05:45 UTC10m
2026-05-23 CSN5149 SZX → DLU May 23, 00:20 UTCMay 23, 00:40 UTC20m
2026-05-22 CSN5457 SZX → WUH May 22, 10:15 UTCMay 22, 10:30 UTC15m
2026-05-22 CSN5150 DLU → SZX May 22, 06:35 UTCMay 22, 06:50 UTC15m
2026-05-22 CSN5149 SZX → DLU May 22, 00:15 UTCMay 22, 00:30 UTC15m
2026-05-21 CSN6154 NGB → SZX May 21, 15:55 UTCMay 21, 17:30 UTC1h 35m
2026-05-21 CSN6153 SZX → NGB May 21, 12:15 UTCMay 21, 12:25 UTC10m
2026-05-21 CSN5150 DLU → SZX May 21, 10:05 UTCMay 21, 10:15 UTC10m
2026-05-21 CSN5149 SZX → DLU May 21, 01:15 UTCMay 21, 01:40 UTC25m
2026-05-20 CSN8576 HFE → SZX May 20, 22:05 UTCMay 20, 22:25 UTC20m
2026-05-20 CSN8575 SZX → HFE May 20, 08:20 UTCMay 20, 08:30 UTC10m
2026-05-20 CSN8678 ENY → SZX May 20, 06:40 UTCMay 20, 06:55 UTC15m
2026-05-20 CSN8677 SZX → ENY May 20, 00:45 UTCMay 20, 00:55 UTC10m
2026-05-19 CSN8612 JHG → SZX May 19, 16:00 UTCMay 19, 16:15 UTC15m
2026-05-19 CSN8611 SZX → JHG May 19, 10:35 UTCMay 19, 10:45 UTC10m
2026-05-19 CSN8712 HGH → SZX May 19, 08:45 UTCMay 19, 09:10 UTC25m
2026-05-19 CSN8711 SZX → HGH May 19, 02:40 UTCMay 19, 02:50 UTC10m
2026-05-18 CSN6480 HGH → SZX May 18, 12:05 UTCMay 18, 12:20 UTC15m
2026-05-18 CSN6479 SZX → HGH May 18, 07:05 UTCMay 18, 07:15 UTC10m
2026-05-18 CSN5853 SZX → SYX May 18, 00:35 UTCMay 18, 00:45 UTC10m
2026-05-17 CSN8491 SZX → TSN May 17, 06:15 UTCMay 17, 06:30 UTC15m
2026-05-17 CSN3352 - May 17, 03:50 UTCMay 17, 04:10 UTC20m
2026-05-16 CSN3351 - May 16, 23:25 UTCMay 16, 23:35 UTC10m
2026-05-16 CSN3626 KHN → CAN May 16, 13:21 UTCMay 16, 14:01 UTC40m

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-6976 page for operator, model, and routing details .

Mode-S 7809B1 frequently asked

What is Mode-S code 7809B1?
7809B1 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6976.
Where is Mode-S 7809B1 registered?
Mode-S code 7809B1 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7809B1 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7809B1, octal 36004661, decimal 7,866,801.
What flights does 7809B1 operate?
Mode-S 7809B1 has broadcast 20 distinct callsigns, including CSN5150, CSN5149, CSN8612, CSN8611, CSN3323.