Apparatus

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sensors Mode-S transponder

781946

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30F6 · AIRBUS A-321neo

Hex
781946
Octal
36014506
Decimal
7,870,790
Country
CN
Tail
B-30F6
Type
A21N
No current signal · last broadcast Jul 26, 11:10 UTC
Flights observed
164
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:10 UTC

Last known position

Most recent position reported by Mode-S 781946.

Country allocation

The ICAO 24-bit address 781946 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
CSN388 - 25 2026-07-16
CSN387 - 16 2026-07-15
CSN8336 - 12 2026-07-14
CSN3038 China Southern Airlines 12 2026-07-26
CSN8137 - 8 2026-07-09
CSN3037 China Southern Airlines 8 2026-07-26
CSN8490 - 7 2026-06-24
CSN8335 - 7 2026-07-14
CSN8138 - 7 2026-07-10
CSN625 China Southern Airlines 5 2026-07-25
CSN8489 - 4 2026-06-24
CSN8482 - 4 2026-06-29
CSN8481 - 4 2026-06-28
CSN8159 - 4 2026-07-02
CSN626 - 4 2026-07-11
CSN395 China Southern Airlines 4 2026-05-09
CSN8160 China Southern Airlines 3 2026-06-23
CSN8102 - 2 2026-07-15
CSN8101 - 2 2026-07-15
CSN390 - 2 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN3038 CGK → CAN Jul 26, 11:00 UTCJul 26, 11:10 UTC10m
2026-07-26 CSN3038 CGK → CAN Jul 26, 06:45 UTCJul 26, 08:15 UTC1h 30m
2026-07-26 CSN3037 CAN → CGK Jul 26, 05:05 UTCJul 26, 05:20 UTC15m
2026-07-25 CSN625 CAN → DPS Jul 25, 12:30 UTCJul 26, 01:35 UTC13h 5m
2026-07-23 CSN3114 PEK → CAN Jul 23, 16:20 UTCJul 23, 16:35 UTC15m
2026-07-22 CSN3114 PEK → CAN Jul 22, 16:25 UTCJul 22, 16:35 UTC10m
2026-07-21 CSN3489 - Jul 21, 13:15 UTCJul 21, 14:05 UTC50m
2026-07-17 CSN3525 CAN → SHA Jul 17, 05:45 UTCJul 17, 06:00 UTC15m
2026-07-16 CSN388 - Jul 16, 02:15 UTCJul 16, 03:40 UTC1h 25m
2026-07-15 CSN387 - Jul 15, 16:10 UTCJul 15, 16:20 UTC10m
2026-07-15 CSN387 - Jul 15, 11:55 UTCJul 15, 12:05 UTC10m
2026-07-15 CSN8102 - Jul 15, 06:25 UTCJul 15, 08:00 UTC1h 35m
2026-07-15 CSN8101 - Jul 15, 03:15 UTCJul 15, 05:00 UTC1h 45m
2026-07-14 CSN8336 - Jul 14, 14:20 UTCJul 14, 14:40 UTC20m
2026-07-14 CSN8336 - Jul 14, 12:00 UTCJul 14, 13:30 UTC1h 30m
2026-07-14 CSN8335 - Jul 14, 10:35 UTCJul 14, 10:55 UTC20m
2026-07-14 CSN8335 - Jul 14, 08:10 UTCJul 14, 08:35 UTC25m
2026-07-11 CSN626 - Jul 11, 21:00 UTCJul 11, 21:20 UTC20m
2026-07-11 CSN625 - Jul 11, 10:50 UTCJul 11, 19:20 UTC8h 30m
2026-07-10 CSN3502 - Jul 10, 12:45 UTCJul 10, 13:35 UTC50m
2026-07-10 CSN8138 - Jul 10, 04:35 UTCJul 10, 05:10 UTC35m
2026-07-09 CSN8137 - Jul 9, 11:10 UTCJul 10, 03:00 UTC15h 50m
2026-07-09 CSN8778 YNT → CAN Jul 9, 09:10 UTCJul 9, 09:25 UTC15m
2026-07-08 CSN8138 - Jul 8, 04:40 UTCJul 8, 05:00 UTC20m
2026-07-07 CSN8137 - Jul 7, 10:25 UTCJul 8, 03:00 UTC16h 35m
2026-07-07 CSN388 - Jul 7, 06:35 UTCJul 7, 06:55 UTC20m
2026-07-07 CSN388 - Jul 7, 02:25 UTCJul 7, 03:50 UTC1h 25m
2026-07-06 CSN387 CAN → CGK Jul 6, 18:10 UTCJul 6, 18:25 UTC15m
2026-07-06 CSN387 CAN → CGK Jul 6, 14:05 UTCJul 6, 14:15 UTC10m
2026-07-06 CSN8102 - Jul 6, 06:15 UTCJul 6, 07:55 UTC1h 40m
2026-07-06 CSN8101 - Jul 6, 03:15 UTCJul 6, 04:55 UTC1h 40m
2026-07-05 CSN8138 - Jul 5, 04:50 UTCJul 5, 05:10 UTC20m
2026-07-04 CSN8137 - Jul 4, 10:55 UTCJul 5, 03:10 UTC16h 15m
2026-07-04 CSN388 - Jul 4, 06:45 UTCJul 4, 07:05 UTC20m
2026-07-04 CSN388 - Jul 4, 02:30 UTCJul 4, 04:00 UTC1h 30m
2026-07-03 CSN387 CAN → CGK Jul 3, 18:40 UTCJul 3, 18:55 UTC15m
2026-07-03 CSN387 CAN → CGK Jul 3, 14:40 UTCJul 3, 14:50 UTC10m
2026-07-02 CSN8159 - Jul 2, 01:50 UTCJul 2, 07:00 UTC5h 10m
2026-07-01 CSN388 - Jul 1, 06:20 UTCJul 1, 06:50 UTC30m
2026-07-01 CSN388 - Jul 1, 02:10 UTCJul 1, 03:40 UTC1h 30m
2026-06-30 CSN387 CAN → CGK Jun 30, 16:25 UTCJun 30, 16:35 UTC10m
2026-06-30 CSN387 CAN → CGK Jun 30, 12:20 UTCJun 30, 12:35 UTC15m
2026-06-29 CSN6499 - Jun 29, 07:20 UTCJun 29, 08:04 UTC45m
2026-06-29 CSN8482 - Jun 29, 04:55 UTCJun 29, 05:09 UTC15m
2026-06-28 CSN8481 - Jun 28, 18:49 UTCJun 29, 03:10 UTC8h 20m
2026-06-27 CSN3038 - Jun 27, 10:40 UTCJun 27, 11:00 UTC20m
2026-06-27 CSN3038 - Jun 27, 06:30 UTCJun 27, 08:05 UTC1h 35m
2026-06-27 CSN3037 - Jun 27, 04:49 UTCJun 27, 05:04 UTC15m
2026-06-26 CSN388 - Jun 26, 06:29 UTCJun 26, 06:39 UTC10m
2026-06-26 CSN388 - Jun 26, 02:20 UTCJun 26, 03:45 UTC1h 25m

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-30F6 page for operator, model, and routing details .

Mode-S 781946 frequently asked

What is Mode-S code 781946?
781946 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30F6.
Where is Mode-S 781946 registered?
Mode-S code 781946 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781946 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781946, octal 36014506, decimal 7,870,790.
What flights does 781946 operate?
Mode-S 781946 has broadcast 20 distinct callsigns, including CSN388, CSN387, CSN8336, CSN3038, CSN8137.