Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781704

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20C6 · BOEING 787-9 Dreamliner

Hex
781704
Octal
36013404
Decimal
7,870,212
Country
CN
Tail
B-20C6
Type
B789
No current signal · last broadcast 3d ago
Flights observed
78
Distinct callsigns
17
Country
CN
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 781704.

Country allocation

The ICAO 24-bit address 781704 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 17 distinct

Callsign Airline Flights Last seen
CSN336 China Southern Airlines 11 2026-05-18
CSN680 China Southern Airlines 10 2026-05-30
CSN8171 China Southern Airlines 9 2026-05-28
CSN8172 China Southern Airlines 8 2026-05-29
CSN679 China Southern Airlines 6 2026-05-30
CSN335 China Southern Airlines 6 2026-05-17
CSN3092 China Southern Airlines 6 2026-05-16
CSN391 China Southern Airlines 4 2026-05-23
CSN392 China Southern Airlines 3 2026-05-23
CSN338 China Southern Airlines 3 2026-05-24
CSN3091 China Southern Airlines 3 2026-05-16
CSN8066 China Southern Airlines 2 2026-05-05
CSN8065 China Southern Airlines 2 2026-05-04
CSN337 China Southern Airlines 2 2026-05-19
CSN3166 China Southern Airlines 1 2026-05-22
CSN304 China Southern Airlines 1 2026-05-03
CSN303 China Southern Airlines 1 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN680 IST → PKX May 30, 12:45 UTCMay 30, 20:30 UTC7h 45m
2026-05-30 CSN679 PKX → IST May 30, 02:50 UTCMay 30, 03:15 UTC25m
2026-05-29 CSN679 PKX → IST May 29, 17:35 UTCMay 30, 02:10 UTC8h 35m
2026-05-29 CSN8172 ICN → CGQ May 29, 01:10 UTCMay 29, 01:25 UTC15m
2026-05-28 CSN8172 ICN → CGQ May 28, 18:10 UTCMay 28, 22:45 UTC4h 35m
2026-05-28 CSN8171 CGQ → ICN May 28, 10:45 UTCMay 28, 15:25 UTC4h 40m
2026-05-28 CSN8171 CGQ → ICN May 28, 07:25 UTCMay 28, 07:35 UTC10m
2026-05-26 CSN680 IST → PKX May 26, 21:00 UTCMay 26, 21:14 UTC15m
2026-05-26 CSN680 IST → PKX May 26, 14:05 UTCMay 26, 18:10 UTC4h 5m
2026-05-26 CSN680 IST → PKX May 26, 13:10 UTCMay 26, 13:19 UTC10m
2026-05-25 CSN679 PKX → IST May 25, 17:20 UTCMay 26, 01:55 UTC8h 34m
2026-05-24 CSN338 ICN → CAN May 24, 07:20 UTCMay 24, 07:45 UTC25m
2026-05-23 CSN392 DAC → CAN May 23, 17:40 UTCMay 24, 05:55 UTC12h 15m
2026-05-23 CSN391 CAN → DAC May 23, 14:50 UTCMay 23, 15:25 UTC35m
2026-05-22 CSN3166 PKX → CAN May 22, 03:00 UTCMay 22, 03:10 UTC10m
2026-05-21 CSN680 IST → PKX May 21, 20:45 UTCMay 21, 20:55 UTC10m
2026-05-21 CSN680 IST → PKX May 21, 13:45 UTCMay 21, 17:40 UTC3h 55m
2026-05-21 CSN680 IST → PKX May 21, 12:55 UTCMay 21, 13:05 UTC10m
2026-05-20 CSN679 PKX → IST May 20, 17:30 UTCMay 21, 02:05 UTC8h 35m
2026-05-19 CSN338 ICN → CAN May 19, 06:30 UTCMay 19, 06:55 UTC25m
2026-05-19 CSN337 CAN → ICN May 19, 04:05 UTCMay 19, 04:45 UTC40m
2026-05-18 CSN336 AKL → CAN May 18, 08:01 UTCMay 18, 08:15 UTC15m
2026-05-17 CSN336 AKL → CAN May 17, 21:40 UTCMay 18, 07:10 UTC9h 30m
2026-05-17 CSN335 CAN → AKL May 17, 07:55 UTCMay 17, 17:55 UTC10h 0m
2026-05-16 CSN3092 MNL → CAN May 16, 05:35 UTCMay 16, 05:51 UTC16m
2026-05-16 CSN3092 MNL → CAN May 16, 04:15 UTCMay 16, 04:50 UTC35m
2026-05-16 CSN3091 CAN → MNL May 16, 01:05 UTCMay 16, 02:40 UTC1h 35m
2026-05-14 CSN680 IST → PKX May 14, 13:30 UTCMay 14, 17:25 UTC3h 55m
2026-05-14 CSN679 PKX → IST May 14, 00:10 UTCMay 14, 01:55 UTC1h 45m
2026-05-12 CSN680 IST → PKX May 12, 13:25 UTCMay 12, 17:40 UTC4h 15m
2026-05-10 CSN8172 ICN → CGQ May 10, 17:45 UTCMay 10, 21:59 UTC4h 15m
2026-05-10 CSN8171 CGQ → ICN May 10, 09:10 UTCMay 10, 15:19 UTC6h 10m
2026-05-09 CSN680 IST → PKX May 9, 13:30 UTCMay 9, 20:49 UTC7h 20m
2026-05-08 CSN679 PKX → IST May 8, 17:35 UTCMay 8, 17:55 UTC20m
2026-05-08 CSN8172 ICN → CGQ May 8, 00:14 UTCMay 8, 00:25 UTC10m
2026-05-07 CSN8172 ICN → CGQ May 7, 17:40 UTCMay 7, 21:45 UTC4h 5m
2026-05-07 CSN8171 CGQ → ICN May 7, 09:10 UTCMay 7, 15:20 UTC6h 10m
2026-05-07 CSN8171 CGQ → ICN May 7, 07:15 UTCMay 7, 07:25 UTC10m
2026-05-06 CSN3092 MNL → CAN May 6, 05:25 UTCMay 6, 05:55 UTC30m
2026-05-06 CSN3092 MNL → CAN May 6, 04:05 UTCMay 6, 04:35 UTC30m
2026-05-06 CSN3091 CAN → MNL May 6, 00:50 UTCMay 6, 02:30 UTC1h 40m
2026-05-05 CSN8066 IST → CAN May 5, 02:30 UTCMay 5, 13:30 UTC11h 0m
2026-05-04 CSN8065 CAN → IST May 4, 03:05 UTCMay 5, 03:00 UTC23h 56m
2026-05-03 CSN304 LHR → CAN May 3, 21:14 UTCMay 4, 03:19 UTC6h 5m
2026-05-03 CSN303 CAN → LHR May 3, 11:00 UTCMay 3, 18:14 UTC7h 15m
2026-05-01 CSN3092 MNL → CAN May 1, 05:35 UTCMay 1, 06:05 UTC30m
2026-05-01 CSN3092 MNL → CAN May 1, 04:15 UTCMay 1, 04:45 UTC30m
2026-05-01 CSN3091 CAN → MNL May 1, 00:35 UTCMay 1, 02:15 UTC1h 40m
2026-04-30 CSN392 DAC → CAN Apr 30, 18:05 UTCApr 30, 18:50 UTC45m
2026-04-30 CSN391 CAN → DAC Apr 30, 12:40 UTCApr 30, 16:00 UTC3h 20m

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-20C6 page for operator, model, and routing details .

Mode-S 781704 frequently asked

What is Mode-S code 781704?
781704 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20C6.
Where is Mode-S 781704 registered?
Mode-S code 781704 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781704 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781704, octal 36013404, decimal 7,870,212.
What flights does 781704 operate?
Mode-S 781704 has broadcast 17 distinct callsigns, including CSN336, CSN680, CSN8171, CSN8172, CSN679.