Apparatus

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sensors Mode-S transponder

7823C5

ICAO 24-bit transponder address · allocated to China

Hex
7823C5
Octal
36021705
Decimal
7,873,477
Country
CN
No current signal · last broadcast 14h ago
Flights observed
49
Distinct callsigns
16
Country
CN
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 7823C5.

Country allocation

The ICAO 24-bit address 7823C5 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 16 distinct

Callsign Airline Flights Last seen
CSN696 - 7 2026-06-15
CSN695 - 7 2026-06-15
CSN6966 China Southern Airlines 6 2026-05-07
CSN6299 China Southern Airlines 5 2026-06-07
CSN676 - 4 2026-06-14
CSN675 - 4 2026-06-14
CSN6300 China Southern Airlines 4 2026-06-07
CSN6337 China Southern Airlines 2 2026-06-06
CSN6327 China Southern Airlines 2 2026-05-15
CSN6507 China Southern Airlines 1 2026-05-16
CSN6338 China Southern Airlines 1 2026-05-23
CSN6328 - 1 2026-06-10
CSN6326 - 1 2026-05-17
CSN6312 China Southern Airlines 1 2026-05-16
CSN6311 China Southern Airlines 1 2026-05-16
CSN3603 - 1 2026-06-13

Recent flights last 49

DateFlightRouteTakeoffLandingDuration
2026-06-15 CSN696 - Jun 15, 08:35 UTCJun 15, 08:49 UTC15m
2026-06-15 CSN695 - Jun 15, 06:40 UTCJun 15, 07:05 UTC25m
2026-06-14 CSN676 - Jun 14, 13:55 UTCJun 14, 14:15 UTC20m
2026-06-14 CSN675 - Jun 14, 11:50 UTCJun 14, 12:15 UTC25m
2026-06-13 CSN3603 - Jun 13, 14:10 UTCJun 13, 14:20 UTC10m
2026-06-13 CSN696 ICN → DLC Jun 13, 08:35 UTCJun 13, 08:50 UTC15m
2026-06-13 CSN695 - Jun 13, 06:45 UTCJun 13, 07:10 UTC25m
2026-06-12 CSN676 - Jun 12, 14:01 UTCJun 12, 14:25 UTC25m
2026-06-12 CSN675 - Jun 12, 12:15 UTCJun 12, 12:40 UTC25m
2026-06-11 CSN696 ICN → DLC Jun 11, 08:35 UTCJun 11, 09:00 UTC25m
2026-06-11 CSN695 DLC → ICN Jun 11, 06:40 UTCJun 11, 07:05 UTC25m
2026-06-10 CSN6328 - Jun 10, 12:10 UTCJun 10, 12:20 UTC10m
2026-06-10 - - Jun 10, 10:05 UTCJun 10, 10:15 UTC10m
2026-06-07 CSN6300 SZX → DLC Jun 7, 04:25 UTCJun 7, 04:35 UTC10m
2026-06-07 CSN6299 DLC → SZX Jun 7, 02:30 UTCJun 7, 02:40 UTC10m
2026-06-06 CSN6337 NKG → HAK Jun 6, 04:20 UTCJun 6, 06:50 UTC2h 30m
2026-06-01 CSN676 - Jun 1, 13:45 UTCJun 1, 14:10 UTC25m
2026-06-01 CSN675 - Jun 1, 11:45 UTCJun 1, 12:05 UTC20m
2026-05-30 CSN696 ICN → DLC May 30, 08:45 UTCMay 30, 09:10 UTC25m
2026-05-30 CSN695 DLC → ICN May 30, 06:35 UTCMay 30, 06:55 UTC20m
2026-05-29 CSN676 - May 29, 13:55 UTCMay 29, 14:15 UTC20m
2026-05-29 CSN675 - May 29, 11:50 UTCMay 29, 12:15 UTC25m
2026-05-29 CSN696 ICN → DLC May 29, 08:45 UTCMay 29, 09:00 UTC15m
2026-05-29 CSN695 DLC → ICN May 29, 06:35 UTCMay 29, 07:00 UTC25m
2026-05-28 CSN696 ICN → DLC May 28, 08:40 UTCMay 28, 08:55 UTC15m
2026-05-28 CSN695 DLC → ICN May 28, 06:40 UTCMay 28, 07:05 UTC25m
2026-05-27 CSN696 ICN → DLC May 27, 08:35 UTCMay 27, 08:50 UTC15m
2026-05-27 CSN695 DLC → ICN May 27, 06:34 UTCMay 27, 07:00 UTC26m
2026-05-23 CSN6338 HAK → NKG May 23, 04:05 UTCMay 23, 07:10 UTC3h 5m
2026-05-20 CSN6337 NKG → HAK May 20, 07:35 UTCMay 20, 11:00 UTC3h 25m
2026-05-19 CSN6300 SZX → DLC May 19, 04:30 UTCMay 19, 04:40 UTC10m
2026-05-19 CSN6299 DLC → SZX May 19, 02:25 UTCMay 19, 02:50 UTC25m
2026-05-17 CSN6326 - May 17, 06:05 UTCMay 17, 06:15 UTC10m
2026-05-16 CSN6507 SHE → PVG May 16, 11:31 UTCMay 16, 12:16 UTC45m
2026-05-16 CSN6312 SZX → SHE May 16, 05:56 UTCMay 16, 06:10 UTC15m
2026-05-16 CSN6311 SHE → SZX May 16, 03:35 UTCMay 16, 03:45 UTC10m
2026-05-15 CSN6327 DLC → SZX May 15, 11:35 UTCMay 15, 11:50 UTC15m
2026-05-09 CSN6300 SZX → DLC May 9, 04:15 UTCMay 9, 04:30 UTC15m
2026-05-09 CSN6299 DLC → SZX May 9, 02:15 UTCMay 9, 02:35 UTC20m
2026-05-09 CSN6299 DLC → SZX May 9, 01:05 UTCMay 9, 01:30 UTC25m
2026-05-08 CSN6300 SZX → DLC May 8, 04:19 UTCMay 8, 04:29 UTC10m
2026-05-08 CSN6299 DLC → SZX May 8, 02:19 UTCMay 8, 02:39 UTC20m
2026-05-07 CSN6966 URC → XIY May 7, 14:15 UTCMay 8, 01:35 UTC11h 20m
2026-05-07 CSN6966 URC → XIY May 7, 06:10 UTCMay 8, 01:35 UTC19h 25m
2026-05-06 CSN6966 URC → XIY May 6, 14:20 UTCMay 7, 06:15 UTC15h 55m
2026-05-05 CSN6966 URC → XIY May 5, 14:00 UTCMay 5, 14:20 UTC20m
2026-05-04 CSN6966 URC → XIY May 4, 06:05 UTCMay 4, 14:35 UTC8h 30m
2026-05-02 CSN6327 DLC → SZX May 2, 09:55 UTCMay 2, 10:20 UTC25m
2026-04-30 CSN6966 URC → XIY Apr 30, 14:10 UTCApr 30, 14:30 UTC20m

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.

Mode-S 7823C5 frequently asked

What is Mode-S code 7823C5?
7823C5 is an ICAO 24-bit transponder address. Allocated to China.
Where is Mode-S 7823C5 registered?
Mode-S code 7823C5 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7823C5 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7823C5, octal 36021705, decimal 7,873,477.
What flights does 7823C5 operate?
Mode-S 7823C5 has broadcast 16 distinct callsigns, including CSN696, CSN695, CSN6966, CSN6299, CSN676.