Apparatus

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sensors Mode-S transponder

781917

ICAO 24-bit transponder address · allocated to China

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

Hex
781917
Octal
36014427
Decimal
7,870,743
Country
CN
Tail
B-30EC
Type
A21N
No current signal · last broadcast Jul 26, 10:15 UTC
Flights observed
357
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 10:15 UTC

Last known position

Most recent position reported by Mode-S 781917.

Country allocation

The ICAO 24-bit address 781917 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
CSN8048 - 14 2026-07-08
CSN8047 - 14 2026-07-08
CSN8353 - 9 2026-07-19
CSN8354 - 8 2026-07-19
CSN5032 - 8 2026-06-25
CSN8118 China Southern Airlines 7 2026-07-20
CSN6481 - 7 2026-07-13
CSN5031 - 7 2026-06-25
CSN3649 - 7 2026-07-03
CSN3369 - 7 2026-07-12
CSN8117 China Southern Airlines 6 2026-07-20
CSN6923 - 5 2026-07-06
CSN6386 - 5 2026-07-15
CSN5844 - 5 2026-06-18
CSN5079 China Southern Airlines 5 2026-06-01
CSN3590 - 5 2026-07-16
CSN3569 - 5 2026-07-18
CSN8097 - 4 2026-07-16
CSN8083 China Southern Airlines 4 2026-07-21
CSN5843 - 4 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN3090 ICN → SZX Jul 26, 09:45 UTCJul 26, 10:15 UTC30m
2026-07-26 CSN3089 SZX → ICN Jul 26, 07:10 UTCJul 26, 07:55 UTC45m
2026-07-25 CSN3626 KHN → CAN Jul 25, 13:10 UTCJul 25, 14:15 UTC1h 5m
2026-07-25 CSN3625 CAN → KHN Jul 25, 06:35 UTCJul 25, 06:50 UTC15m
2026-07-25 CSN3192 PEK → SZX Jul 25, 05:00 UTCJul 25, 05:10 UTC10m
2026-07-25 CSN3192 PEK → SZX Jul 25, 02:25 UTCJul 25, 02:55 UTC30m
2026-07-24 CSN3155 SZX → PEK Jul 24, 14:00 UTCJul 24, 14:35 UTC35m
2026-07-24 CSN3155 SZX → PEK Jul 24, 11:55 UTCJul 24, 12:10 UTC15m
2026-07-24 CSN3552 SHA → SZX Jul 24, 05:30 UTCJul 24, 10:00 UTC4h 30m
2026-07-24 CSN3551 SZX → SHA Jul 24, 04:10 UTCJul 24, 04:25 UTC15m
2026-07-23 CSN3641 SZX → CKG Jul 23, 14:20 UTCJul 23, 14:30 UTC10m
2026-07-23 CSN8492 TSN → SZX Jul 23, 12:30 UTCJul 23, 12:55 UTC25m
2026-07-23 CSN8491 SZX → TSN Jul 23, 05:45 UTCJul 23, 06:00 UTC15m
2026-07-23 CSN3352 - Jul 23, 04:05 UTCJul 23, 04:15 UTC10m
2026-07-22 CSN3351 - Jul 22, 23:15 UTCJul 22, 23:25 UTC10m
2026-07-22 CSN3912 WUH → SZX Jul 22, 15:35 UTCJul 22, 15:50 UTC15m
2026-07-22 CSN3911 - Jul 22, 00:25 UTCJul 22, 00:40 UTC15m
2026-07-21 CSN3920 NNY → SZX Jul 21, 18:30 UTCJul 21, 18:55 UTC25m
2026-07-21 CSN3919 SZX → NNY Jul 21, 12:10 UTCJul 21, 12:25 UTC15m
2026-07-21 CSN8084 HAN → SZX Jul 21, 09:20 UTCJul 21, 09:35 UTC15m
2026-07-21 CSN8083 SZX → HAN Jul 21, 07:15 UTCJul 21, 07:50 UTC35m
2026-07-21 CSN8083 SZX → HAN Jul 21, 06:15 UTCJul 21, 06:30 UTC15m
2026-07-21 CSN5846 - Jul 21, 02:10 UTCJul 21, 02:30 UTC20m
2026-07-20 CSN5845 SZX → TYN Jul 20, 12:40 UTCJul 20, 12:50 UTC10m
2026-07-20 CSN8118 SIN → SZX Jul 20, 10:05 UTCJul 20, 10:20 UTC15m
2026-07-20 CSN8118 SIN → SZX Jul 20, 06:50 UTCJul 20, 07:05 UTC15m
2026-07-20 CSN8117 SZX → SIN Jul 20, 04:50 UTCJul 20, 05:15 UTC25m
2026-07-19 CSN8354 - Jul 19, 21:50 UTCJul 19, 22:05 UTC15m
2026-07-19 CSN8354 - Jul 19, 17:30 UTCJul 19, 18:55 UTC1h 25m
2026-07-19 CSN8353 - Jul 19, 15:30 UTCJul 19, 15:45 UTC15m
2026-07-19 CSN8353 - Jul 19, 11:30 UTCJul 19, 11:40 UTC10m
2026-07-19 CSN3614 - Jul 19, 09:25 UTCJul 19, 09:35 UTC10m
2026-07-19 CSN3613 - Jul 19, 03:05 UTCJul 19, 07:00 UTC3h 55m
2026-07-19 CSN3613 - Jul 19, 00:45 UTCJul 19, 00:55 UTC10m
2026-07-18 CSN5842 - Jul 18, 13:30 UTCJul 18, 13:40 UTC10m
2026-07-18 CSN5841 - Jul 18, 07:05 UTCJul 18, 07:15 UTC10m
2026-07-18 CSN3570 - Jul 18, 05:15 UTCJul 18, 05:25 UTC10m
2026-07-18 CSN3569 - Jul 18, 00:15 UTCJul 18, 00:25 UTC10m
2026-07-17 CSN3912 WUH → SZX Jul 17, 16:34 UTCJul 17, 16:49 UTC15m
2026-07-17 CSN3911 - Jul 17, 00:30 UTCJul 17, 00:40 UTC10m
2026-07-16 CSN8098 - Jul 16, 09:40 UTCJul 16, 09:55 UTC15m
2026-07-16 CSN8097 - Jul 16, 07:50 UTCJul 16, 08:20 UTC30m
2026-07-16 CSN8097 - Jul 16, 05:00 UTCJul 16, 05:10 UTC10m
2026-07-16 CSN3590 - Jul 16, 02:05 UTCJul 16, 02:25 UTC20m
2026-07-15 CSN6386 - Jul 15, 10:20 UTCJul 15, 10:30 UTC10m
2026-07-15 CSN6386 - Jul 15, 03:45 UTCJul 15, 07:55 UTC4h 10m
2026-07-15 CSN6385 - Jul 15, 01:30 UTCJul 15, 01:40 UTC10m
2026-07-14 CSN8098 - Jul 14, 10:20 UTCJul 14, 10:35 UTC15m
2026-07-14 CSN8097 - Jul 14, 08:05 UTCJul 14, 08:40 UTC35m
2026-07-14 CSN8097 - Jul 14, 05:15 UTCJul 14, 05:25 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.

Prefer a tail-number view? See the B-30EC page for operator, model, and routing details .

Mode-S 781917 frequently asked

What is Mode-S code 781917?
781917 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30EC.
Where is Mode-S 781917 registered?
Mode-S code 781917 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781917 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781917, octal 36014427, decimal 7,870,743.
What flights does 781917 operate?
Mode-S 781917 has broadcast 20 distinct callsigns, including CSN8048, CSN8047, CSN8353, CSN8354, CSN5032.