Apparatus

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sensors Mode-S transponder

7817B7

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30AL · AIRBUS A-350-900

Hex
7817B7
Octal
36013667
Decimal
7,870,391
Country
CN
Tail
B-30AL
Type
A359
No current signal · last broadcast 25d ago
Flights observed
44
Distinct callsigns
13
Country
CN
Last broadcast
25d ago

Last known position

Most recent position reported by Mode-S 7817B7.

Country allocation

The ICAO 24-bit address 7817B7 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 13 distinct

Callsign Airline Flights Last seen
CSN326 China Southern Airlines 10 2026-05-05
CSN382 China Southern Airlines 6 2026-05-01
CSN381 China Southern Airlines 6 2026-04-30
CSN308 China Southern Airlines 5 2026-04-21
CSN325 China Southern Airlines 4 2026-05-04
CSN8028 China Southern Airlines 3 2026-04-19
CSN307 China Southern Airlines 3 2026-04-20
CSN382D China Southern Airlines 2 2026-04-18
CSN8027 China Southern Airlines 1 2026-04-19
CSN8004 China Southern Airlines 1 2026-04-28
CSN8003 China Southern Airlines 1 2026-04-28
CSN350 China Southern Airlines 1 2026-05-02
CSN349 China Southern Airlines 1 2026-05-02

Recent flights last 44

DateFlightRouteTakeoffLandingDuration
2026-05-05 CSN326 SYD → CAN May 5, 09:00 UTCMay 5, 09:35 UTC35m
2026-05-05 CSN326 SYD → CAN May 5, 00:15 UTCMay 5, 08:05 UTC7h 50m
2026-05-04 CSN325 CAN → SYD May 4, 13:20 UTCMay 4, 21:40 UTC8h 21m
2026-05-03 CSN326 SYD → CAN May 3, 00:20 UTCMay 3, 08:00 UTC7h 39m
2026-05-02 CSN325 CAN → SYD May 2, 13:20 UTCMay 2, 21:45 UTC8h 25m
2026-05-02 CSN350 KUL → CAN May 2, 06:10 UTCMay 2, 06:25 UTC15m
2026-05-02 CSN349 CAN → KUL May 2, 01:15 UTCMay 2, 04:30 UTC3h 15m
2026-05-01 CSN382 BNE → CAN May 1, 08:30 UTCMay 1, 08:45 UTC15m
2026-05-01 CSN382 BNE → CAN May 1, 00:35 UTCMay 1, 07:40 UTC7h 5m
2026-04-30 CSN381 CAN → BNE Apr 30, 13:35 UTCApr 30, 21:25 UTC7h 50m
2026-04-30 CSN326 SYD → CAN Apr 30, 08:50 UTCApr 30, 09:00 UTC10m
2026-04-30 CSN326 SYD → CAN Apr 30, 00:25 UTCApr 30, 07:45 UTC7h 20m
2026-04-29 CSN325 CAN → SYD Apr 29, 13:30 UTCApr 29, 22:00 UTC8h 30m
2026-04-28 CSN8004 SVO → WUH Apr 28, 19:25 UTCApr 28, 19:45 UTC20m
2026-04-28 CSN8003 WUH → SVO Apr 28, 11:25 UTCApr 28, 15:45 UTC4h 20m
2026-04-27 CSN382 BNE → CAN Apr 27, 08:15 UTCApr 27, 08:30 UTC15m
2026-04-27 CSN382 BNE → CAN Apr 27, 00:20 UTCApr 27, 07:25 UTC7h 5m
2026-04-26 CSN381 CAN → BNE Apr 26, 13:30 UTCApr 26, 21:25 UTC7h 55m
2026-04-26 CSN326 SYD → CAN Apr 26, 08:40 UTCApr 26, 09:00 UTC20m
2026-04-26 CSN326 SYD → CAN Apr 26, 00:20 UTCApr 26, 07:45 UTC7h 25m
2026-04-25 CSN325 CAN → SYD Apr 25, 13:20 UTCApr 25, 22:00 UTC8h 40m
2026-04-25 CSN382 BNE → CAN Apr 25, 08:10 UTCApr 25, 08:35 UTC25m
2026-04-25 CSN382 BNE → CAN Apr 25, 00:30 UTCApr 25, 07:25 UTC6h 55m
2026-04-24 CSN381 CAN → BNE Apr 24, 13:50 UTCApr 24, 21:55 UTC8h 5m
2026-04-21 CSN308 AMS → CAN Apr 21, 11:35 UTCApr 21, 17:35 UTC6h 0m
2026-04-20 CSN307 CAN → AMS Apr 20, 10:45 UTCApr 21, 05:45 UTC19h 0m
2026-04-19 CSN8028 SVO → CAN Apr 19, 16:30 UTCApr 20, 10:45 UTC18h 15m
2026-04-19 CSN8028 SVO → CAN Apr 19, 13:50 UTCApr 20, 10:45 UTC20h 55m
2026-04-19 CSN8028 SVO → CAN Apr 19, 13:35 UTCApr 20, 10:45 UTC21h 10m
2026-04-19 CSN8027 CAN → SVO Apr 19, 06:35 UTCApr 19, 11:10 UTC4h 35m
2026-04-18 CSN382D BNE → CAN Apr 18, 12:45 UTCApr 18, 13:10 UTC25m
2026-04-18 CSN382D BNE → CAN Apr 18, 04:55 UTCApr 18, 12:00 UTC7h 5m
2026-04-16 CSN381 CAN → BNE Apr 16, 21:14 UTCApr 16, 21:39 UTC25m
2026-04-16 CSN381 CAN → BNE Apr 16, 15:15 UTCApr 16, 15:35 UTC20m
2026-04-16 CSN381 CAN → BNE Apr 16, 13:50 UTCApr 16, 15:10 UTC1h 20m
2026-04-14 CSN308 AMS → CAN Apr 14, 16:55 UTCApr 14, 17:35 UTC40m
2026-04-14 CSN308 AMS → CAN Apr 14, 14:50 UTCApr 14, 15:05 UTC15m
2026-04-14 CSN308 AMS → CAN Apr 14, 12:50 UTCApr 14, 14:45 UTC1h 55m
2026-04-14 CSN308 AMS → CAN Apr 14, 11:45 UTCApr 14, 12:45 UTC1h 0m
2026-04-14 CSN307 CAN → AMS Apr 14, 05:15 UTCApr 14, 05:30 UTC15m
2026-04-13 CSN307 CAN → AMS Apr 13, 23:00 UTCApr 13, 23:40 UTC40m
2026-04-13 CSN326 SYD → CAN Apr 13, 09:00 UTCApr 13, 09:15 UTC15m
2026-04-13 CSN326 SYD → CAN Apr 13, 07:45 UTCApr 13, 08:10 UTC25m
2026-04-13 CSN326 SYD → CAN Apr 13, 00:35 UTCApr 13, 01:35 UTC1h 0m

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-30AL page for operator, model, and routing details .

Mode-S 7817B7 frequently asked

What is Mode-S code 7817B7?
7817B7 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30AL.
Where is Mode-S 7817B7 registered?
Mode-S code 7817B7 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7817B7 broadcasting right now?
No active broadcast right now. Last signal was 25d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7817B7, octal 36013667, decimal 7,870,391.
What flights does 7817B7 operate?
Mode-S 7817B7 has broadcast 13 distinct callsigns, including CSN326, CSN382, CSN381, CSN308, CSN325.