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 Jul 26, 11:55 UTC
Flights observed
299
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:55 UTC

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
CSN8323 China Southern Airlines 12 2026-07-26
CSN8324 China Southern Airlines 10 2026-07-26
CSN8083 - 10 2026-07-17
CSN3155 - 8 2026-07-15
CSN3169 China Southern Airlines 7 2026-07-25
CSN8738 China Southern Airlines 6 2026-07-24
CSN8084 - 6 2026-07-14
CSN8075 - 6 2026-07-12
CSN8466 - 5 2026-06-27
CSN8465 - 5 2026-06-27
CSN8284 - 5 2026-07-17
CSN8076 - 5 2026-07-12
CSN6480 China Southern Airlines 5 2026-07-23
CSN3583 China Southern Airlines 5 2026-07-24
CSN3191 - 5 2026-07-12
CSN3172 China Southern Airlines 5 2026-07-25
CSN8577 - 4 2026-07-13
CSN8495 - 4 2026-07-19
CSN8283 - 4 2026-07-16
CSN6752 - 4 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN8324 BKK → SZX Jul 26, 10:30 UTCJul 26, 11:55 UTC1h 25m
2026-07-26 CSN8323 SZX → BKK Jul 26, 08:05 UTCJul 26, 08:30 UTC25m
2026-07-26 CSN8323 SZX → BKK Jul 26, 06:10 UTCJul 26, 06:25 UTC15m
2026-07-25 CSN3172 PKX → SZX Jul 25, 12:25 UTCJul 25, 12:45 UTC20m
2026-07-25 CSN3169 SZX → PKX Jul 25, 03:45 UTCJul 25, 04:00 UTC15m
2026-07-25 CSN3590 SHA → SZX Jul 25, 01:25 UTCJul 25, 02:05 UTC40m
2026-07-24 CSN3589 SZX → SHA Jul 24, 13:40 UTCJul 24, 13:50 UTC10m
2026-07-24 CSN3584 KHN → SZX Jul 24, 09:40 UTCJul 24, 10:05 UTC25m
2026-07-24 CSN3583 SZX → KHN Jul 24, 03:25 UTCJul 24, 03:40 UTC15m
2026-07-24 CSN8738 NGB → SZX Jul 24, 01:35 UTCJul 24, 01:55 UTC20m
2026-07-23 CSN6480 HGH → SZX Jul 23, 11:45 UTCJul 23, 12:20 UTC35m
2026-07-23 CSN3560 NKG → SZX Jul 23, 05:35 UTCJul 23, 05:50 UTC15m
2026-07-23 CSN3559 - Jul 23, 00:45 UTCJul 23, 00:55 UTC10m
2026-07-22 CSN6921 SZX → HIA Jul 22, 01:05 UTCJul 22, 01:15 UTC10m
2026-07-21 CSN3434 CTU → SZX Jul 21, 15:50 UTCJul 21, 16:00 UTC10m
2026-07-21 CSN3433 - Jul 21, 10:25 UTCJul 21, 10:40 UTC15m
2026-07-21 CSN3565 SZX → HFE Jul 21, 04:00 UTCJul 21, 04:10 UTC10m
2026-07-20 CSN8324 BKK → SZX Jul 20, 10:25 UTCJul 20, 10:55 UTC30m
2026-07-20 CSN8323 SZX → BKK Jul 20, 08:35 UTCJul 20, 08:45 UTC10m
2026-07-20 CSN8323 SZX → BKK Jul 20, 06:30 UTCJul 20, 06:45 UTC15m
2026-07-19 CSN3405 CAN → CKG Jul 19, 23:20 UTCJul 19, 23:30 UTC10m
2026-07-19 CSN3236 CAN → KWL Jul 19, 16:30 UTCJul 19, 16:50 UTC20m
2026-07-19 CSN3235 - Jul 19, 12:40 UTCJul 19, 12:50 UTC10m
2026-07-19 CSN8495 - Jul 19, 04:30 UTCJul 19, 04:40 UTC10m
2026-07-19 CSN3578 NKG → SZX Jul 19, 02:15 UTCJul 19, 02:35 UTC20m
2026-07-18 CSN3577 - Jul 18, 13:30 UTCJul 18, 13:40 UTC10m
2026-07-18 CSN3562 - Jul 18, 09:50 UTCJul 18, 10:45 UTC55m
2026-07-17 CSN3173 - Jul 17, 11:00 UTCJul 17, 11:10 UTC10m
2026-07-17 CSN8083 - Jul 17, 05:55 UTCJul 17, 06:05 UTC10m
2026-07-17 CSN8083 - Jul 17, 04:59 UTCJul 17, 05:15 UTC15m
2026-07-17 CSN8284 - Jul 17, 02:10 UTCJul 17, 02:20 UTC10m
2026-07-16 CSN8283 - Jul 16, 13:05 UTCJul 16, 13:15 UTC10m
2026-07-15 CSN3155 - Jul 15, 12:20 UTCJul 15, 12:30 UTC10m
2026-07-15 CSN3172 - Jul 15, 10:30 UTCJul 15, 10:55 UTC25m
2026-07-15 CSN3169 - Jul 15, 04:05 UTCJul 15, 04:15 UTC10m
2026-07-15 CSN3590 - Jul 15, 01:25 UTCJul 15, 02:20 UTC55m
2026-07-14 CSN8084 - Jul 14, 07:50 UTCJul 14, 08:00 UTC10m
2026-07-14 CSN8083 - Jul 14, 04:50 UTCJul 14, 05:00 UTC10m
2026-07-14 CSN8578 - Jul 14, 01:10 UTCJul 14, 01:35 UTC25m
2026-07-13 CSN8577 - Jul 13, 13:30 UTCJul 13, 13:40 UTC10m
2026-07-13 CSN8470 - Jul 13, 10:35 UTCJul 13, 10:55 UTC20m
2026-07-13 CSN8469 - Jul 13, 06:50 UTCJul 13, 07:01 UTC10m
2026-07-13 CSN3192 - Jul 13, 04:55 UTCJul 13, 05:05 UTC10m
2026-07-12 CSN3191 - Jul 12, 09:45 UTCJul 12, 09:55 UTC10m
2026-07-12 CSN8076 - Jul 12, 07:10 UTCJul 12, 07:31 UTC20m
2026-07-12 CSN8076 - Jul 12, 05:10 UTCJul 12, 05:20 UTC10m
2026-07-12 CSN8075 - Jul 12, 03:15 UTCJul 12, 03:35 UTC20m
2026-07-12 CSN8075 - Jul 12, 01:15 UTCJul 12, 01:30 UTC15m
2026-07-11 CSN5368 - Jul 11, 14:30 UTCJul 11, 14:55 UTC25m
2026-07-11 CSN5367 - Jul 11, 10:15 UTCJul 11, 10:25 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-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 Jul 26, 11:55 UTC.
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 CSN8323, CSN8324, CSN8083, CSN3155, CSN3169.