Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7813B4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1089 · AIRBUS A-321neo

Hex
7813B4
Octal
36011664
Decimal
7,869,364
Country
CN
Tail
B-1089
Type
A21N
No current signal · last broadcast 11h ago
Flights observed
87
Distinct callsigns
20
Country
CN
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 7813B4.

Country allocation

The ICAO 24-bit address 7813B4 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
CSN3040 China Southern Airlines 10 2026-05-27
CSN352 China Southern Airlines 7 2026-05-10
CSN3039 China Southern Airlines 7 2026-05-27
CSN5015 China Southern Airlines 4 2026-05-25
CSN358 China Southern Airlines 4 2026-05-29
CSN357 China Southern Airlines 4 2026-05-29
CSN354 China Southern Airlines 4 2026-04-29
CSN8149 China Southern Airlines 3 2026-05-28
CSN8100 China Southern Airlines 3 2026-05-14
CSN8099 China Southern Airlines 3 2026-05-14
CSN364 China Southern Airlines 3 2026-05-20
CSN363 China Southern Airlines 3 2026-05-20
CSN362 China Southern Airlines 3 2026-05-02
CSN361 China Southern Airlines 3 2026-05-01
CSN351 China Southern Airlines 3 2026-05-02
CSN340 China Southern Airlines 3 2026-05-30
CSN3062 China Southern Airlines 3 2026-05-24
CSN3061 China Southern Airlines 3 2026-05-24
CSN8484 China Southern Airlines 2 2026-05-24
CSN8483 China Southern Airlines 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN340 ICN → CAN May 30, 01:00 UTCMay 30, 01:20 UTC20m
2026-05-29 CSN358 BKK → CAN May 29, 04:45 UTCMay 29, 15:15 UTC10h 30m
2026-05-29 CSN357 CAN → BKK May 29, 00:45 UTCMay 29, 02:55 UTC2h 10m
2026-05-28 CSN8149 CAN → VTE May 28, 01:30 UTCMay 28, 05:35 UTC4h 5m
2026-05-27 CSN3040 SIN → CAN May 27, 13:05 UTCMay 27, 13:25 UTC20m
2026-05-27 CSN3040 SIN → CAN May 27, 10:05 UTCMay 27, 10:25 UTC20m
2026-05-27 CSN3039 CAN → SIN May 27, 05:04 UTCMay 27, 05:14 UTC10m
2026-05-25 CSN5016 DAC → CAN May 25, 11:05 UTCMay 25, 11:40 UTC35m
2026-05-25 CSN5015 CAN → DAC May 25, 09:05 UTCMay 25, 09:30 UTC25m
2026-05-25 CSN5015 CAN → DAC May 25, 04:30 UTCMay 25, 06:10 UTC1h 40m
2026-05-25 CSN5015 CAN → DAC May 25, 02:15 UTCMay 25, 02:25 UTC10m
2026-05-24 CSN8484 BKI → CAN May 24, 19:50 UTCMay 24, 20:10 UTC20m
2026-05-24 CSN8484 BKI → CAN May 24, 17:40 UTCMay 24, 18:00 UTC20m
2026-05-24 CSN8483 CAN → BKI May 24, 15:50 UTCMay 24, 16:10 UTC20m
2026-05-24 CSN8483 CAN → BKI May 24, 13:40 UTCMay 24, 14:15 UTC35m
2026-05-24 CSN3062 ICN → CAN May 24, 07:55 UTCMay 24, 08:20 UTC25m
2026-05-24 CSN3061 CAN → ICN May 24, 05:50 UTCMay 24, 06:20 UTC30m
2026-05-22 CSN340 ICN → CAN May 22, 01:00 UTCMay 22, 01:25 UTC25m
2026-05-21 CSN339 CAN → ICN May 21, 12:30 UTCMay 21, 13:01 UTC30m
2026-05-20 CSN364 BKK → CAN May 20, 13:15 UTCMay 20, 13:45 UTC30m
2026-05-20 CSN363 CAN → BKK May 20, 09:15 UTCMay 20, 11:35 UTC2h 20m
2026-05-20 CSN8149 CAN → VTE May 20, 02:30 UTCMay 20, 02:45 UTC15m
2026-05-18 CSN358 BKK → CAN May 18, 04:30 UTCMay 18, 04:55 UTC25m
2026-05-18 CSN357 CAN → BKK May 18, 02:10 UTCMay 18, 02:55 UTC45m
2026-05-17 CSN3040 SIN → CAN May 17, 13:31 UTCMay 17, 13:40 UTC10m
2026-05-17 CSN3040 SIN → CAN May 17, 10:15 UTCMay 17, 10:45 UTC30m
2026-05-17 CSN3039 CAN → SIN May 17, 07:55 UTCMay 17, 08:10 UTC15m
2026-05-17 CSN3039 CAN → SIN May 17, 05:05 UTCMay 17, 05:15 UTC10m
2026-05-14 CSN8100 BKK → CAN May 14, 06:50 UTCMay 14, 07:30 UTC40m
2026-05-14 CSN8099 CAN → BKK May 14, 03:05 UTCMay 14, 05:10 UTC2h 5m
2026-05-10 CSN352 SIN → CAN May 10, 03:30 UTCMay 10, 04:00 UTC30m
2026-05-10 CSN352 SIN → CAN May 10, 00:30 UTCMay 10, 00:45 UTC15m
2026-05-08 CSN3062 ICN → CAN May 8, 07:44 UTCMay 8, 08:29 UTC45m
2026-05-08 CSN3061 CAN → ICN May 8, 05:35 UTCMay 8, 06:14 UTC40m
2026-05-06 CSN3040 SIN → CAN May 6, 13:35 UTCMay 6, 13:50 UTC15m
2026-05-06 CSN3040 SIN → CAN May 6, 10:40 UTCMay 6, 10:55 UTC15m
2026-05-06 CSN3039 CAN → SIN May 6, 05:35 UTCMay 6, 08:40 UTC3h 5m
2026-05-04 CSN358 BKK → CAN May 4, 04:29 UTCMay 4, 05:00 UTC30m
2026-05-04 CSN357 CAN → BKK May 4, 00:45 UTCMay 4, 03:00 UTC2h 15m
2026-05-03 CSN364 BKK → CAN May 3, 12:10 UTCMay 3, 12:40 UTC30m
2026-05-03 CSN363 CAN → BKK May 3, 08:30 UTCMay 3, 10:50 UTC2h 20m
2026-05-03 CSN352 SIN → CAN May 3, 00:15 UTCMay 3, 00:30 UTC15m
2026-05-02 CSN351 CAN → SIN May 2, 11:45 UTCMay 2, 15:20 UTC3h 35m
2026-05-02 CSN362 BKK → CAN May 2, 01:40 UTCMay 2, 02:15 UTC35m
2026-05-01 CSN361 CAN → BKK May 1, 14:00 UTCMay 1, 14:40 UTC40m
2026-05-01 CSN8100 BKK → CAN May 1, 07:35 UTCMay 1, 08:05 UTC30m
2026-05-01 CSN8099 CAN → BKK May 1, 04:40 UTCMay 1, 05:35 UTC55m
2026-04-30 CSN352 SIN → CAN Apr 30, 03:35 UTCApr 30, 03:45 UTC10m
2026-04-30 CSN352 SIN → CAN Apr 30, 00:30 UTCApr 30, 00:50 UTC20m
2026-04-29 CSN351 CAN → SIN Apr 29, 14:55 UTCApr 29, 15:30 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-1089 page for operator, model, and routing details .

Mode-S 7813B4 frequently asked

What is Mode-S code 7813B4?
7813B4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1089.
Where is Mode-S 7813B4 registered?
Mode-S code 7813B4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7813B4 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7813B4, octal 36011664, decimal 7,869,364.
What flights does 7813B4 operate?
Mode-S 7813B4 has broadcast 20 distinct callsigns, including CSN3040, CSN352, CSN3039, CSN5015, CSN358.