Apparatus

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sensors Mode-S transponder

7823BC

ICAO 24-bit transponder address · allocated to China

Hex
7823BC
Octal
36021674
Decimal
7,873,468
Country
CN
No current signal · last broadcast 9h ago
Flights observed
203
Distinct callsigns
20
Country
CN
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 7823BC.

Country allocation

The ICAO 24-bit address 7823BC 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
CSZ9245 - 20 2026-07-13
CSZ9241 Shenzhen Airlines 9 2026-06-29
CSZ8271 - 8 2026-07-18
CSZ8272 - 6 2026-07-17
CSZ306 Shenzhen Airlines 6 2026-07-24
CSZ9403 - 5 2026-07-19
CSZ309 Shenzhen Airlines 5 2026-07-25
CSZ305 Shenzhen Airlines 5 2026-07-24
CSZ9849 - 4 2026-07-02
CSZ9521 Shenzhen Airlines 4 2026-05-28
CSZ8111 - 4 2026-07-23
CSZ310 Shenzhen Airlines 4 2026-07-25
CSZ308 Shenzhen Airlines 4 2026-07-24
CSZ307 Shenzhen Airlines 4 2026-07-24
CSZ9892 - 3 2026-07-19
CSZ9890 - 3 2026-06-21
CSZ9850 Shenzhen Airlines 3 2026-07-02
CSZ9844 Shenzhen Airlines 3 2026-06-12
CSZ9843 - 3 2026-07-08
CSZ9522 Shenzhen Airlines 3 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSZ9886 TYN → SZX Jul 26, 12:45 UTCJul 26, 12:55 UTC10m
2026-07-25 CSZ310 BKK → SZX Jul 25, 07:35 UTCJul 25, 07:50 UTC15m
2026-07-25 CSZ310 BKK → SZX Jul 25, 05:25 UTCJul 25, 07:00 UTC1h 35m
2026-07-25 CSZ309 SZX → BKK Jul 25, 02:30 UTCJul 25, 04:00 UTC1h 30m
2026-07-25 CSZ309 SZX → BKK Jul 25, 01:45 UTCJul 25, 01:55 UTC10m
2026-07-24 CSZ306 BKK → SZX Jul 24, 23:35 UTCJul 25, 00:00 UTC25m
2026-07-24 CSZ306 BKK → SZX Jul 24, 21:20 UTCJul 24, 21:50 UTC30m
2026-07-24 CSZ305 SZX → BKK Jul 24, 18:25 UTCJul 24, 18:50 UTC25m
2026-07-24 CSZ305 SZX → BKK Jul 24, 16:30 UTCJul 24, 16:45 UTC15m
2026-07-24 CSZ308 BKK → SZX Jul 24, 14:35 UTCJul 24, 14:55 UTC20m
2026-07-24 CSZ308 BKK → SZX Jul 24, 12:30 UTCJul 24, 12:55 UTC25m
2026-07-24 CSZ307 SZX → BKK Jul 24, 10:35 UTCJul 24, 11:10 UTC35m
2026-07-24 CSZ307 SZX → BKK Jul 24, 08:45 UTCJul 24, 09:00 UTC15m
2026-07-23 CSZ9235 SZX → XNN Jul 23, 23:10 UTCJul 23, 23:20 UTC10m
2026-07-23 CSZ8111 - Jul 23, 07:05 UTCJul 23, 07:15 UTC10m
2026-07-23 CSZ9512 PVG → SZX Jul 23, 04:30 UTCJul 23, 05:35 UTC1h 5m
2026-07-23 CSZ9511 SZX → PVG Jul 23, 00:05 UTCJul 23, 00:15 UTC10m
2026-07-22 CSZ9306 CGO → SZX Jul 22, 15:55 UTCJul 22, 16:05 UTC10m
2026-07-22 CSZ309 SZX → BKK Jul 22, 03:05 UTCJul 22, 04:40 UTC1h 35m
2026-07-22 CSZ309 SZX → BKK Jul 22, 02:20 UTCJul 22, 02:35 UTC15m
2026-07-21 CSZ8983 - Jul 21, 10:40 UTCJul 21, 10:55 UTC15m
2026-07-21 CSZ310 BKK → SZX Jul 21, 07:50 UTCJul 21, 08:00 UTC10m
2026-07-21 CSZ310 BKK → SZX Jul 21, 05:35 UTCJul 21, 06:00 UTC25m
2026-07-21 CSZ309 SZX → BKK Jul 21, 01:40 UTCJul 21, 04:00 UTC2h 20m
2026-07-20 CSZ306 - Jul 20, 23:00 UTCJul 20, 23:15 UTC15m
2026-07-20 CSZ306 - Jul 20, 20:45 UTCJul 20, 21:10 UTC25m
2026-07-20 CSZ305 - Jul 20, 16:35 UTCJul 20, 18:50 UTC2h 15m
2026-07-20 CSZ308 - Jul 20, 14:35 UTCJul 20, 14:50 UTC15m
2026-07-20 CSZ308 - Jul 20, 12:20 UTCJul 20, 14:00 UTC1h 40m
2026-07-20 CSZ307 SZX → BKK Jul 20, 10:15 UTCJul 20, 10:50 UTC35m
2026-07-20 CSZ307 SZX → BKK Jul 20, 08:25 UTCJul 20, 08:40 UTC15m
2026-07-20 CSZ9141 SZX → YCU Jul 20, 01:10 UTCJul 20, 01:20 UTC10m
2026-07-19 CSZ9892 - Jul 19, 14:15 UTCJul 19, 14:30 UTC15m
2026-07-19 CSZ9404 - Jul 19, 06:50 UTCJul 19, 07:00 UTC10m
2026-07-19 CSZ9403 - Jul 19, 01:00 UTCJul 19, 01:10 UTC10m
2026-07-18 CSZ306 - Jul 18, 22:55 UTCJul 18, 23:10 UTC15m
2026-07-18 CSZ306 - Jul 18, 20:50 UTCJul 18, 21:10 UTC20m
2026-07-18 CSZ305 - Jul 18, 18:45 UTCJul 18, 19:05 UTC20m
2026-07-18 CSZ305 - Jul 18, 16:40 UTCJul 18, 17:00 UTC20m
2026-07-18 CSZ8271 - Jul 18, 00:19 UTCJul 18, 00:35 UTC15m
2026-07-17 CSZ8272 - Jul 17, 12:45 UTCJul 17, 12:55 UTC10m
2026-07-17 CSZ8271 - Jul 17, 00:20 UTCJul 17, 00:35 UTC15m
2026-07-16 CSZ8272 - Jul 16, 12:49 UTCJul 16, 13:00 UTC10m
2026-07-16 CSZ8271 - Jul 16, 00:45 UTCJul 16, 01:00 UTC15m
2026-07-15 CSZ8112 - Jul 15, 16:50 UTCJul 15, 17:00 UTC10m
2026-07-15 CSZ8111 - Jul 15, 07:55 UTCJul 15, 08:10 UTC15m
2026-07-15 CSZ9511 - Jul 15, 00:10 UTCJul 15, 00:20 UTC10m
2026-07-14 CSZ9528 - Jul 14, 15:05 UTCJul 14, 16:20 UTC1h 15m
2026-07-14 CSZ9527 - Jul 14, 10:35 UTCJul 14, 10:45 UTC10m
2026-07-14 CSZ9236 - Jul 14, 06:40 UTCJul 14, 06:50 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.

Mode-S 7823BC frequently asked

What is Mode-S code 7823BC?
7823BC is an ICAO 24-bit transponder address. Allocated to China.
Where is Mode-S 7823BC registered?
Mode-S code 7823BC is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7823BC broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7823BC, octal 36021674, decimal 7,873,468.
What flights does 7823BC operate?
Mode-S 7823BC has broadcast 20 distinct callsigns, including CSZ9245, CSZ9241, CSZ8271, CSZ8272, CSZ306.