Apparatus

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sensors Mode-S transponder

781934

ICAO 24-bit transponder address · allocated to China

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

Hex
781934
Octal
36014464
Decimal
7,870,772
Country
CN
Tail
B-20EL
Type
B789
No current signal · last broadcast 13h ago
Flights observed
61
Distinct callsigns
20
Country
CN
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 781934.

Country allocation

The ICAO 24-bit address 781934 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
CSN680 China Southern Airlines 7 2026-05-25
CSN633 China Southern Airlines 4 2026-04-17
CSN8172 China Southern Airlines 3 2026-05-20
CSN8066 China Southern Airlines 3 2026-05-28
CSN8065 China Southern Airlines 3 2026-05-28
CSN679 China Southern Airlines 3 2026-05-25
CSN634 China Southern Airlines 3 2026-04-18
CSN392 China Southern Airlines 3 2026-05-29
CSN391 China Southern Airlines 3 2026-05-29
CSN337 China Southern Airlines 3 2026-05-29
CSN8171 China Southern Airlines 2 2026-05-19
CSN654 China Southern Airlines 2 2026-05-09
CSN653 China Southern Airlines 2 2026-05-09
CSN338 China Southern Airlines 2 2026-05-11
CSN3081 China Southern Airlines 2 2026-05-08
CSN8069 China Southern Airlines 1 2026-05-26
CSN6904 China Southern Airlines 1 2026-05-21
CSN6903 China Southern Airlines 1 2026-05-21
CSN690 China Southern Airlines 1 2026-05-14
CSN689 China Southern Airlines 1 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSN392 DAC → CAN May 29, 18:35 UTCMay 29, 19:25 UTC50m
2026-05-29 CSN391 CAN → DAC May 29, 06:30 UTCMay 29, 17:15 UTC10h 45m
2026-05-29 CSN337 CAN → ICN May 29, 04:10 UTCMay 29, 04:45 UTC35m
2026-05-28 CSN8066 IST → CAN May 28, 11:35 UTCMay 28, 16:15 UTC4h 40m
2026-05-28 CSN8065 CAN → IST May 28, 03:15 UTCMay 28, 03:35 UTC20m
2026-05-26 CSN8069 CAN → ISB May 26, 10:39 UTCMay 26, 19:45 UTC9h 5m
2026-05-25 CSN680 IST → PKX May 25, 20:30 UTCMay 25, 20:45 UTC15m
2026-05-25 CSN680 IST → PKX May 25, 13:35 UTCMay 25, 17:40 UTC4h 5m
2026-05-25 CSN679 PKX → IST May 25, 02:40 UTCMay 25, 02:50 UTC10m
2026-05-21 CSN6903 URC → PKX May 21, 09:05 UTCMay 21, 09:20 UTC15m
2026-05-21 CSN6904 PKX → URC May 21, 01:15 UTCMay 21, 01:30 UTC15m
2026-05-20 CSN8172 ICN → CGQ May 20, 00:40 UTCMay 20, 00:55 UTC15m
2026-05-19 CSN8172 ICN → CGQ May 19, 17:50 UTCMay 19, 22:05 UTC4h 15m
2026-05-19 CSN8171 CGQ → ICN May 19, 07:15 UTCMay 19, 15:10 UTC7h 55m
2026-05-18 CSN680 IST → PKX May 18, 20:35 UTCMay 18, 20:50 UTC15m
2026-05-18 CSN680 IST → PKX May 18, 14:20 UTCMay 18, 17:40 UTC3h 20m
2026-05-18 CSN680 IST → PKX May 18, 12:55 UTCMay 18, 13:05 UTC10m
2026-05-18 CSN679 PKX → IST May 18, 02:50 UTCMay 18, 03:05 UTC15m
2026-05-17 CSN679 PKX → IST May 17, 17:35 UTCMay 18, 02:05 UTC8h 30m
2026-05-16 CSN680 IST → PKX May 16, 13:46 UTCMay 16, 17:50 UTC4h 5m
2026-05-16 CSN680 IST → PKX May 16, 12:55 UTCMay 16, 13:11 UTC15m
2026-05-16 CSN8065 CAN → IST May 16, 01:55 UTCMay 16, 02:45 UTC50m
2026-05-14 CSN690 LGW → CAN May 14, 10:20 UTCMay 14, 16:40 UTC6h 20m
2026-05-13 CSN689 CAN → LGW May 13, 22:20 UTCMay 14, 05:15 UTC6h 55m
2026-05-12 CSN8066 IST → CAN May 12, 12:50 UTCMay 12, 16:45 UTC3h 55m
2026-05-11 CSN338 ICN → CAN May 11, 06:30 UTCMay 11, 07:10 UTC40m
2026-05-11 CSN337 CAN → ICN May 11, 04:15 UTCMay 11, 04:50 UTC35m
2026-05-11 - - May 11, 02:10 UTCMay 11, 02:20 UTC10m
2026-05-09 CSN654 LGW → CGO May 9, 20:44 UTCMay 10, 02:55 UTC6h 10m
2026-05-09 CSN653 CGO → LGW May 9, 10:00 UTCMay 9, 17:10 UTC7h 10m
2026-05-08 CSN3082 BKK → CAN May 8, 09:14 UTCMay 8, 09:59 UTC45m
2026-05-08 CSN3081 CAN → BKK May 8, 06:25 UTCMay 8, 07:04 UTC40m
2026-05-06 CSN338 ICN → CAN May 6, 06:35 UTCMay 6, 07:10 UTC35m
2026-05-06 CSN337 CAN → ICN May 6, 04:00 UTCMay 6, 04:35 UTC35m
2026-05-02 CSN8066 IST → CAN May 2, 01:45 UTCMay 2, 16:20 UTC14h 36m
2026-05-01 CSN8065 CAN → IST May 1, 09:25 UTCMay 2, 02:55 UTC17h 30m
2026-05-01 CSN3081 CAN → BKK May 1, 05:00 UTCMay 1, 07:20 UTC2h 20m
2026-04-30 CSN6038 LHE → CAN Apr 30, 17:10 UTCApr 30, 19:35 UTC2h 25m
2026-04-30 CSN6037 CAN → LHE Apr 30, 09:40 UTCApr 30, 14:50 UTC5h 10m
2026-04-28 CSN654 LGW → CGO Apr 28, 20:50 UTCApr 29, 03:19 UTC6h 30m
2026-04-28 CSN653 CGO → LGW Apr 28, 09:50 UTCApr 28, 16:35 UTC6h 45m
2026-04-26 CSN304 LHR → CAN Apr 26, 21:15 UTCApr 27, 03:30 UTC6h 15m
2026-04-26 CSN303 CAN → LHR Apr 26, 11:10 UTCApr 26, 18:05 UTC6h 55m
2026-04-25 CSN3110 PEK → CAN Apr 25, 14:05 UTCApr 25, 14:15 UTC10m
2026-04-23 CSN8172 ICN → CGQ Apr 23, 17:50 UTCApr 23, 22:15 UTC4h 25m
2026-04-23 CSN8171 CGQ → ICN Apr 23, 09:20 UTCApr 23, 15:30 UTC6h 10m
2026-04-21 CSN392 DAC → CAN Apr 21, 17:40 UTCApr 21, 18:20 UTC40m
2026-04-21 CSN391 CAN → DAC Apr 21, 15:05 UTCApr 21, 16:01 UTC55m
2026-04-20 CSN3521 CAN → HGH Apr 20, 00:35 UTCApr 20, 00:45 UTC10m
2026-04-19 CSN392 DAC → CAN Apr 19, 17:40 UTCApr 19, 18:25 UTC45m

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

Mode-S 781934 frequently asked

What is Mode-S code 781934?
781934 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20EL.
Where is Mode-S 781934 registered?
Mode-S code 781934 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781934 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781934, octal 36014464, decimal 7,870,772.
What flights does 781934 operate?
Mode-S 781934 has broadcast 20 distinct callsigns, including CSN680, CSN633, CSN8172, CSN8066, CSN8065.