Apparatus

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sensors Mode-S transponder

7816C9

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-308U · AIRBUS A-321neo

Hex
7816C9
Octal
36013311
Decimal
7,870,153
Country
CN
Tail
B-308U
Type
A21N
No current signal · last broadcast 4h ago
Flights observed
65
Distinct callsigns
20
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 7816C9.

Country allocation

The ICAO 24-bit address 7816C9 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
CSN6086 China Southern Airlines 8 2026-05-20
CSN6085 China Southern Airlines 7 2026-05-19
CSN5300 China Southern Airlines 6 2026-05-26
CSN3906 China Southern Airlines 5 2026-05-27
CSN3616 China Southern Airlines 4 2026-05-30
CSN6251 China Southern Airlines 3 2026-05-20
CSN6141 China Southern Airlines 3 2026-05-21
CSN5973 China Southern Airlines 3 2026-06-03
CSN3743 China Southern Airlines 3 2026-04-19
CSN8326 China Southern Airlines 2 2026-04-29
CSN8325 China Southern Airlines 2 2026-04-27
CSN6274 China Southern Airlines 2 2026-05-24
CSN6273 China Southern Airlines 2 2026-05-24
CSN3905 China Southern Airlines 2 2026-05-30
CSN3744 China Southern Airlines 2 2026-04-20
CSN6257 China Southern Airlines 1 2026-05-18
CSN6256 China Southern Airlines 1 2026-05-04
CSN5984 China Southern Airlines 1 2026-05-04
CSN5974 China Southern Airlines 1 2026-05-17
CSN5919 China Southern Airlines 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 CSN5973 HRB → CSX Jun 3, 14:05 UTCJun 4, 01:30 UTC11h 25m
2026-05-30 CSN3905 CAN → HRB May 30, 14:20 UTCMay 31, 10:25 UTC20h 5m
2026-05-30 CSN3616 HRB → CAN May 30, 07:00 UTCMay 30, 14:25 UTC7h 25m
2026-05-29 CSN3616 HRB → CAN May 29, 10:20 UTCMay 30, 07:20 UTC21h 0m
2026-05-29 CSN3040 SIN → CAN May 29, 10:05 UTCMay 30, 07:20 UTC21h 15m
2026-05-29 CSN3039 CAN → SIN May 29, 05:15 UTCMay 29, 08:15 UTC3h 0m
2026-05-27 CSN3616 HRB → CAN May 27, 13:40 UTCMay 28, 07:30 UTC17h 50m
2026-05-27 CSN3616 HRB → CAN May 27, 08:45 UTCMay 28, 07:30 UTC22h 45m
2026-05-27 CSN3906 HRB → CAN May 27, 02:14 UTCMay 27, 13:50 UTC11h 35m
2026-05-26 CSN3906 HRB → CAN May 26, 13:15 UTCMay 27, 09:00 UTC19h 45m
2026-05-26 CSN3906 HRB → CAN May 26, 06:20 UTCMay 27, 02:39 UTC20h 20m
2026-05-26 CSN5300 JHG → PKX May 26, 05:59 UTCMay 27, 02:14 UTC20h 15m
2026-05-25 CSN5300 JHG → PKX May 25, 11:20 UTCMay 26, 06:20 UTC18h 59m
2026-05-24 CSN6274 SZX → HRB May 24, 06:50 UTCMay 24, 07:00 UTC10m
2026-05-24 CSN6273 HRB → SZX May 24, 04:35 UTCMay 24, 04:55 UTC20m
2026-05-21 CSN6141 HRB → PVG May 21, 09:40 UTCMay 22, 02:20 UTC16h 40m
2026-05-21 CSN6141 HRB → PVG May 21, 00:15 UTCMay 21, 10:25 UTC10h 10m
2026-05-20 CSN6251 HRB → PVG May 20, 08:55 UTCMay 21, 00:45 UTC15h 50m
2026-05-20 CSN6086 NRT → HRB May 20, 04:00 UTCMay 21, 00:45 UTC20h 46m
2026-05-19 CSN6085 HRB → NRT May 19, 09:55 UTCMay 20, 02:10 UTC16h 15m
2026-05-19 CSN6141 HRB → PVG May 19, 00:50 UTCMay 19, 10:00 UTC9h 10m
2026-05-18 CSN6251 HRB → PVG May 18, 08:45 UTCMay 19, 00:50 UTC16h 4m
2026-05-18 CSN6257 HRB → PVG May 18, 00:50 UTCMay 18, 09:15 UTC8h 25m
2026-05-17 CSN5974 CSX → HRB May 17, 13:15 UTCMay 18, 09:15 UTC20h 0m
2026-05-16 CSN6274 SZX → HRB May 16, 08:36 UTCMay 16, 08:46 UTC10m
2026-05-16 CSN6273 HRB → SZX May 16, 04:40 UTCMay 16, 04:50 UTC10m
2026-05-14 CSN6251 HRB → PVG May 14, 00:05 UTCMay 14, 09:15 UTC9h 10m
2026-05-13 CSN6086 NRT → HRB May 13, 04:20 UTCMay 14, 00:15 UTC19h 55m
2026-05-13 CSN6086 NRT → HRB May 13, 04:00 UTCMay 14, 00:15 UTC20h 15m
2026-05-13 CSN6085 HRB → NRT May 13, 01:45 UTCMay 13, 02:30 UTC45m
2026-05-10 CSN5160 CAN → RIZ May 10, 13:55 UTCMay 10, 14:04 UTC10m
2026-05-10 - - May 10, 07:25 UTCMay 10, 07:34 UTC10m
2026-05-06 CSN6086 NRT → HRB May 6, 04:20 UTCMay 7, 00:20 UTC19h 59m
2026-05-06 CSN6086 NRT → HRB May 6, 04:10 UTCMay 7, 00:20 UTC20h 9m
2026-05-05 CSN6085 HRB → NRT May 5, 13:15 UTCMay 6, 03:00 UTC13h 45m
2026-05-05 CSN6085 HRB → NRT May 5, 06:20 UTCMay 6, 03:00 UTC20h 40m
2026-05-05 CSN6085 HRB → NRT May 5, 06:05 UTCMay 6, 03:00 UTC20h 55m
2026-05-05 CSN5300 JHG → PKX May 5, 01:50 UTCMay 5, 13:35 UTC11h 45m
2026-05-04 CSN5984 HRB → PKX May 4, 14:25 UTCMay 4, 14:35 UTC10m
2026-05-04 CSN6256 TFU → HRB May 4, 09:45 UTCMay 4, 09:55 UTC10m
2026-05-02 CSN3905 CAN → HRB May 2, 13:50 UTCMay 3, 02:00 UTC12h 10m
2026-04-30 CSN3623 CAN → HRB Apr 30, 09:00 UTCApr 30, 14:00 UTC5h 0m
2026-04-29 CSN8326 HRB → CAN Apr 29, 13:05 UTCApr 30, 02:15 UTC13h 9m
2026-04-29 CSN5300 JHG → PKX Apr 29, 06:00 UTCApr 29, 06:19 UTC20m
2026-04-28 CSN5300 JHG → PKX Apr 28, 09:55 UTCApr 29, 06:19 UTC20h 25m
2026-04-28 CSN8326 HRB → CAN Apr 28, 02:10 UTCApr 28, 10:10 UTC8h 0m
2026-04-27 CSN8325 CAN → HRB Apr 27, 13:10 UTCApr 28, 10:10 UTC21h 0m
2026-04-27 CSN8325 CAN → HRB Apr 27, 06:20 UTCApr 28, 02:30 UTC20h 10m
2026-04-27 CSN5300 JHG → PKX Apr 27, 06:00 UTCApr 28, 02:30 UTC20h 30m
2026-04-26 CSN6086 NRT → HRB Apr 26, 04:05 UTCApr 26, 04:40 UTC35m

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-308U page for operator, model, and routing details .

Mode-S 7816C9 frequently asked

What is Mode-S code 7816C9?
7816C9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-308U.
Where is Mode-S 7816C9 registered?
Mode-S code 7816C9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7816C9 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7816C9, octal 36013311, decimal 7,870,153.
What flights does 7816C9 operate?
Mode-S 7816C9 has broadcast 20 distinct callsigns, including CSN6086, CSN6085, CSN5300, CSN3906, CSN3616.