Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781703

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20C5 · BOEING 777-300ER

Hex
781703
Octal
36013403
Decimal
7,870,211
Country
CN
Tail
B-20C5
Type
B77W
No current signal · last broadcast 2d ago
Flights observed
52
Distinct callsigns
18
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781703.

Country allocation

The ICAO 24-bit address 781703 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 18 distinct

Callsign Airline Flights Last seen
CSN385 China Southern Airlines 6 2026-05-26
CSN312 China Southern Airlines 6 2026-05-17
CSN311 China Southern Airlines 6 2026-05-16
CSN347 China Southern Airlines 4 2026-04-17
CSN3096 China Southern Airlines 4 2026-04-18
CSN3095 China Southern Airlines 4 2026-04-18
CSN386 China Southern Airlines 3 2026-05-27
CSN348 China Southern Airlines 3 2026-04-17
CSN327 China Southern Airlines 3 2026-05-25
CSN658 China Southern Airlines 2 2026-04-29
CSN328 China Southern Airlines 2 2026-05-26
CSN3098 China Southern Airlines 2 2026-05-28
CSN3097 China Southern Airlines 2 2026-05-28
CSN699 China Southern Airlines 1 2026-04-29
CSN657 China Southern Airlines 1 2026-04-28
CSN600 China Southern Airlines 1 2026-05-02
CSN3024 China Southern Airlines 1 2026-05-23
CSN3023 China Southern Airlines 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 CSN3098 TPE → CAN May 28, 07:10 UTCMay 28, 08:15 UTC1h 5m
2026-05-28 CSN3097 CAN → TPE May 28, 03:55 UTCMay 28, 05:20 UTC1h 25m
2026-05-27 CSN386 HND → CAN May 27, 07:00 UTCMay 27, 08:15 UTC1h 15m
2026-05-26 CSN385 CAN → HND May 26, 17:15 UTCMay 27, 04:45 UTC11h 30m
2026-05-26 CSN328 LAX → CAN May 26, 06:59 UTCMay 26, 18:55 UTC11h 55m
2026-05-25 CSN327 CAN → LAX May 25, 16:25 UTCMay 26, 02:29 UTC10h 5m
2026-05-23 CSN3024 TPE → CGO May 23, 04:05 UTCMay 23, 04:20 UTC15m
2026-05-23 CSN3023 CGO → TPE May 23, 01:55 UTCMay 23, 02:20 UTC25m
2026-05-21 CSN328 LAX → CAN May 21, 07:10 UTCMay 21, 19:30 UTC12h 20m
2026-05-20 CSN327 CAN → LAX May 20, 17:40 UTCMay 21, 03:25 UTC9h 45m
2026-05-20 CSN327 CAN → LAX May 20, 06:50 UTCMay 21, 03:25 UTC20h 35m
2026-05-20 CSN385 CAN → HND May 20, 03:40 UTCMay 20, 05:00 UTC1h 21m
2026-05-19 CSN385 CAN → HND May 19, 06:55 UTCMay 20, 05:00 UTC22h 6m
2026-05-19 CSN385 CAN → HND May 19, 03:25 UTCMay 19, 04:50 UTC1h 25m
2026-05-17 CSN312 YYZ → CAN May 17, 05:40 UTCMay 17, 18:25 UTC12h 45m
2026-05-16 CSN311 CAN → YYZ May 16, 19:45 UTCMay 17, 01:45 UTC6h 0m
2026-05-13 CSN312 YYZ → CAN May 13, 05:40 UTCMay 13, 08:40 UTC3h 0m
2026-05-12 CSN311 CAN → YYZ May 12, 13:45 UTCMay 13, 02:05 UTC12h 20m
2026-05-10 CSN312 YYZ → CAN May 10, 05:40 UTCMay 10, 08:35 UTC2h 55m
2026-05-09 CSN311 CAN → YYZ May 9, 13:40 UTCMay 10, 01:55 UTC12h 15m
2026-05-08 CSN312 YYZ → CAN May 8, 05:44 UTCMay 8, 18:10 UTC12h 25m
2026-05-07 CSN311 CAN → YYZ May 7, 13:55 UTCMay 8, 02:04 UTC12h 9m
2026-05-06 CSN312 YYZ → CAN May 6, 05:30 UTCMay 6, 18:00 UTC12h 29m
2026-05-05 CSN311 CAN → YYZ May 5, 13:35 UTCMay 6, 01:45 UTC12h 10m
2026-05-02 CSN600 JFK → CAN May 2, 05:25 UTCMay 2, 18:05 UTC12h 40m
2026-04-29 CSN699 CAN → JFK Apr 29, 18:50 UTCApr 30, 14:35 UTC19h 44m
2026-04-29 CSN658 SFO → CAN Apr 29, 17:30 UTCApr 30, 14:35 UTC21h 4m
2026-04-29 CSN658 SFO → CAN Apr 29, 07:45 UTCApr 29, 19:15 UTC11h 31m
2026-04-28 CSN657 HRB → NRT Apr 28, 18:00 UTCApr 29, 03:19 UTC9h 20m
2026-04-28 CSN386 HND → CAN Apr 28, 06:45 UTCApr 28, 08:10 UTC1h 25m
2026-04-28 CSN385 CAN → HND Apr 28, 03:25 UTCApr 28, 04:40 UTC1h 15m
2026-04-21 CSN386 HND → CAN Apr 21, 07:05 UTCApr 21, 08:25 UTC1h 20m
2026-04-21 CSN385 CAN → HND Apr 21, 03:35 UTCApr 21, 04:45 UTC1h 10m
2026-04-20 CSN312 YYZ → CAN Apr 20, 05:30 UTCApr 20, 17:55 UTC12h 25m
2026-04-19 CSN311 CAN → YYZ Apr 19, 13:55 UTCApr 20, 01:55 UTC12h 0m
2026-04-18 CSN3096 TPE → PVG Apr 18, 10:10 UTCApr 18, 10:25 UTC15m
2026-04-18 CSN3095 PVG → TPE Apr 18, 08:00 UTCApr 18, 08:25 UTC25m
2026-04-17 CSN348 CDG → CAN Apr 17, 16:40 UTCApr 17, 17:15 UTC35m
2026-04-17 CSN348 CDG → CAN Apr 17, 13:20 UTCApr 17, 14:55 UTC1h 35m
2026-04-17 CSN348 CDG → CAN Apr 17, 11:20 UTCApr 17, 13:15 UTC1h 55m
2026-04-17 CSN347 CAN → CDG Apr 17, 05:20 UTCApr 17, 05:35 UTC15m
2026-04-17 CSN347 CAN → CDG Apr 17, 03:20 UTCApr 17, 05:15 UTC1h 56m
2026-04-17 CSN347 CAN → CDG Apr 17, 01:30 UTCApr 17, 03:15 UTC1h 45m
2026-04-16 CSN347 CAN → CDG Apr 16, 22:24 UTCApr 16, 23:10 UTC45m
2026-04-16 CSN3098 TPE → CAN Apr 16, 07:09 UTCApr 16, 07:34 UTC25m
2026-04-16 CSN3097 CAN → TPE Apr 16, 03:45 UTCApr 16, 05:00 UTC1h 15m
2026-04-15 CSN3096 TPE → PVG Apr 15, 10:05 UTCApr 15, 10:20 UTC15m
2026-04-15 CSN3095 PVG → TPE Apr 15, 07:55 UTCApr 15, 08:20 UTC25m
2026-04-14 CSN3096 - Apr 14, 10:05 UTCApr 14, 10:25 UTC20m
2026-04-14 CSN3095 - Apr 14, 08:05 UTCApr 14, 08:25 UTC20m

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-20C5 page for operator, model, and routing details .

Mode-S 781703 frequently asked

What is Mode-S code 781703?
781703 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20C5.
Where is Mode-S 781703 registered?
Mode-S code 781703 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781703 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781703, octal 36013403, decimal 7,870,211.
What flights does 781703 operate?
Mode-S 781703 has broadcast 18 distinct callsigns, including CSN385, CSN312, CSN311, CSN347, CSN3096.