Apparatus

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sensors Mode-S transponder

7813D9

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1088 · AIRBUS A-321neo

Hex
7813D9
Octal
36011731
Decimal
7,869,401
Country
CN
Tail
B-1088
Type
A21N
No current signal · last broadcast Jul 26, 12:35 UTC
Flights observed
182
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:35 UTC

Last known position

Most recent position reported by Mode-S 7813D9.

Country allocation

The ICAO 24-bit address 7813D9 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 17 2026-07-22
CSN3039 China Southern Airlines 13 2026-07-25
CSN339 China Southern Airlines 12 2026-07-26
CSN352 China Southern Airlines 10 2026-07-17
CSN340 - 9 2026-07-14
CSN8099 - 8 2026-07-08
CSN361 China Southern Airlines 8 2026-07-17
CSN357 China Southern Airlines 8 2026-07-25
CSN3044 - 8 2026-07-09
CSN8100 - 6 2026-07-08
CSN362 China Southern Airlines 6 2026-07-18
CSN351 - 6 2026-07-16
CSN363 - 5 2026-06-25
CSN358 China Southern Airlines 5 2026-07-26
CSN3062 China Southern Airlines 5 2026-07-24
CSN3061 China Southern Airlines 5 2026-07-24
CSN3043 - 5 2026-07-09
CSN5016 - 4 2026-07-02
CSN364 - 4 2026-06-25
CSN3407 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN339 CAN → ICN Jul 26, 10:45 UTCJul 26, 12:35 UTC1h 50m
2026-07-26 CSN358 BKK → CAN Jul 26, 04:30 UTCJul 26, 05:00 UTC30m
2026-07-25 CSN357 CAN → BKK Jul 25, 10:55 UTCJul 26, 02:50 UTC15h 55m
2026-07-25 CSN3039 CAN → SIN Jul 25, 05:30 UTCJul 25, 09:10 UTC3h 40m
2026-07-24 CSN3062 ICN → CAN Jul 24, 07:50 UTCJul 24, 08:30 UTC40m
2026-07-24 CSN3061 CAN → ICN Jul 24, 05:20 UTCJul 24, 06:00 UTC40m
2026-07-23 CSN3708 TNA → CAN Jul 23, 16:10 UTCJul 23, 16:20 UTC10m
2026-07-22 CSN3040 SIN → CAN Jul 22, 13:40 UTCJul 22, 14:00 UTC20m
2026-07-21 CSN8988 HLD → CAN Jul 21, 02:00 UTCJul 21, 12:10 UTC10h 10m
2026-07-20 CSN3509 CAN → TNA Jul 20, 01:00 UTCJul 20, 01:10 UTC10m
2026-07-19 CSN3040 - Jul 19, 13:10 UTCJul 19, 13:35 UTC25m
2026-07-19 CSN3040 - Jul 19, 10:00 UTCJul 19, 10:25 UTC25m
2026-07-19 CSN3039 CAN → SIN Jul 19, 08:30 UTCJul 19, 08:45 UTC15m
2026-07-18 CSN362 BKK → CAN Jul 18, 01:30 UTCJul 18, 01:50 UTC20m
2026-07-17 CSN361 CAN → BKK Jul 17, 15:20 UTCJul 17, 15:35 UTC15m
2026-07-17 CSN352 SIN → CAN Jul 17, 03:20 UTCJul 17, 03:39 UTC20m
2026-07-17 CSN352 SIN → CAN Jul 17, 00:10 UTCJul 17, 00:40 UTC30m
2026-07-16 CSN351 - Jul 16, 14:55 UTCJul 16, 15:14 UTC20m
2026-07-16 CSN351 - Jul 16, 12:00 UTCJul 16, 12:14 UTC15m
2026-07-16 CSN3615 - Jul 16, 03:00 UTCJul 16, 07:15 UTC4h 15m
2026-07-15 CSN3062 - Jul 15, 08:25 UTCJul 16, 07:15 UTC22h 50m
2026-07-15 CSN3061 - Jul 15, 06:30 UTCJul 15, 07:15 UTC45m
2026-07-14 CSN3671 - Jul 14, 14:45 UTCJul 14, 14:55 UTC10m
2026-07-14 CSN3407 - Jul 14, 07:50 UTCJul 14, 08:00 UTC10m
2026-07-14 CSN340 - Jul 14, 00:50 UTCJul 14, 01:35 UTC45m
2026-07-13 CSN339 - Jul 13, 04:30 UTCJul 13, 12:25 UTC7h 55m
2026-07-13 CSN357 - Jul 13, 02:35 UTCJul 13, 02:50 UTC15m
2026-07-13 CSN357 - Jul 13, 00:40 UTCJul 13, 00:50 UTC10m
2026-07-12 CSN3040 - Jul 12, 13:10 UTCJul 12, 13:30 UTC20m
2026-07-12 CSN3040 - Jul 12, 10:05 UTCJul 12, 10:30 UTC25m
2026-07-12 CSN3039 - Jul 12, 07:55 UTCJul 12, 08:20 UTC25m
2026-07-12 CSN3039 - Jul 12, 05:05 UTCJul 12, 05:15 UTC10m
2026-07-11 CSN352 - Jul 11, 03:25 UTCJul 11, 04:05 UTC40m
2026-07-11 CSN352 - Jul 11, 00:20 UTCJul 11, 00:50 UTC30m
2026-07-10 CSN351 - Jul 10, 14:45 UTCJul 10, 15:10 UTC25m
2026-07-10 CSN351 - Jul 10, 11:55 UTCJul 10, 12:05 UTC10m
2026-07-10 CSN8988 - Jul 10, 02:45 UTCJul 10, 07:45 UTC5h 0m
2026-07-09 CSN3044 - Jul 9, 15:10 UTCJul 9, 15:30 UTC20m
2026-07-09 CSN3044 - Jul 9, 11:55 UTCJul 9, 12:25 UTC30m
2026-07-09 CSN3043 - Jul 9, 07:20 UTCJul 9, 10:40 UTC3h 20m
2026-07-09 CSN362 - Jul 9, 01:35 UTCJul 9, 02:05 UTC30m
2026-07-08 CSN361 CAN → BKK Jul 8, 12:25 UTCJul 8, 15:10 UTC2h 45m
2026-07-08 CSN8100 - Jul 8, 07:50 UTCJul 8, 09:30 UTC1h 40m
2026-07-08 CSN8099 - Jul 8, 05:40 UTCJul 8, 06:05 UTC25m
2026-07-08 CSN8099 - Jul 8, 04:05 UTCJul 8, 04:40 UTC35m
2026-07-07 CSN3407 - Jul 7, 09:20 UTCJul 7, 09:30 UTC10m
2026-07-07 CSN358 - Jul 7, 04:40 UTCJul 7, 06:15 UTC1h 35m
2026-07-07 CSN357 - Jul 7, 02:50 UTCJul 7, 03:20 UTC30m
2026-07-06 CSN3044 - Jul 6, 15:40 UTCJul 6, 16:00 UTC20m
2026-07-06 CSN3044 - Jul 6, 12:35 UTCJul 6, 13:00 UTC25m

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-1088 page for operator, model, and routing details .

Mode-S 7813D9 frequently asked

What is Mode-S code 7813D9?
7813D9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1088.
Where is Mode-S 7813D9 registered?
Mode-S code 7813D9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7813D9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7813D9, octal 36011731, decimal 7,869,401.
What flights does 7813D9 operate?
Mode-S 7813D9 has broadcast 20 distinct callsigns, including CSN3040, CSN3039, CSN339, CSN352, CSN340.