Apparatus

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sensors Mode-S transponder

781945

ICAO 24-bit transponder address · allocated to China

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

Hex
781945
Octal
36014505
Decimal
7,870,789
Country
CN
Tail
B-20EP
Type
B789
No current signal · last broadcast 7h ago
Flights observed
67
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 781945.

Country allocation

The ICAO 24-bit address 781945 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
CSN8066 China Southern Airlines 8 2026-05-23
CSN8065 China Southern Airlines 7 2026-05-23
CSN336 China Southern Airlines 6 2026-05-25
CSN680 China Southern Airlines 5 2026-05-19
CSN8172 China Southern Airlines 4 2026-05-18
CSN679 China Southern Airlines 4 2026-05-19
CSN338 China Southern Airlines 4 2026-05-04
CSN335 China Southern Airlines 3 2026-05-24
CSN3082 China Southern Airlines 3 2026-05-22
CSN3081 China Southern Airlines 3 2026-05-22
CSN8171 China Southern Airlines 2 2026-05-17
CSN654 China Southern Airlines 2 2026-05-26
CSN653 China Southern Airlines 2 2026-05-26
CSN633 China Southern Airlines 2 2026-05-29
CSN337 China Southern Airlines 2 2026-05-02
CSN3023 China Southern Airlines 2 2026-05-29
CSN8022 China Southern Airlines 1 2026-05-07
CSN8021 China Southern Airlines 1 2026-05-06
CSN634 China Southern Airlines 1 2026-04-27
CSN392 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSN633 CAN → NBO May 29, 04:25 UTCMay 29, 22:55 UTC18h 30m
2026-05-29 CSN3023 CGO → TPE May 29, 02:15 UTCMay 29, 02:50 UTC35m
2026-05-28 CSN3024 TPE → CGO May 28, 04:05 UTCMay 29, 02:50 UTC22h 45m
2026-05-28 CSN3023 CGO → TPE May 28, 02:00 UTCMay 28, 02:35 UTC35m
2026-05-26 CSN654 LGW → CGO May 26, 20:29 UTCMay 27, 02:39 UTC6h 10m
2026-05-26 CSN653 CGO → LGW May 26, 09:45 UTCMay 26, 16:45 UTC7h 0m
2026-05-25 CSN336 AKL → CAN May 25, 07:55 UTCMay 25, 08:10 UTC15m
2026-05-24 CSN336 AKL → CAN May 24, 21:15 UTCMay 25, 07:10 UTC9h 55m
2026-05-24 CSN335 CAN → AKL May 24, 07:55 UTCMay 24, 18:00 UTC10h 5m
2026-05-23 CSN8066 IST → CAN May 23, 12:35 UTCMay 23, 13:35 UTC1h 0m
2026-05-23 CSN8065 CAN → IST May 23, 03:15 UTCMay 23, 03:25 UTC10m
2026-05-22 CSN3082 BKK → CAN May 22, 09:20 UTCMay 22, 22:20 UTC13h 0m
2026-05-22 CSN3081 CAN → BKK May 22, 06:40 UTCMay 22, 07:25 UTC45m
2026-05-21 CSN8066 IST → CAN May 21, 11:40 UTCMay 21, 13:45 UTC2h 5m
2026-05-21 CSN8065 CAN → IST May 21, 01:50 UTCMay 21, 03:05 UTC1h 15m
2026-05-19 CSN680 IST → PKX May 19, 13:40 UTCMay 19, 20:50 UTC7h 10m
2026-05-19 CSN680 IST → PKX May 19, 12:55 UTCMay 19, 13:05 UTC10m
2026-05-19 CSN679 PKX → IST May 19, 02:50 UTCMay 19, 03:00 UTC10m
2026-05-19 CSN679 PKX → IST May 19, 01:00 UTCMay 19, 02:10 UTC1h 10m
2026-05-18 CSN679 PKX → IST May 18, 17:30 UTCMay 18, 17:40 UTC10m
2026-05-18 CSN8172 ICN → CGQ May 18, 00:40 UTCMay 18, 00:55 UTC15m
2026-05-17 CSN8172 ICN → CGQ May 17, 17:50 UTCMay 17, 22:05 UTC4h 15m
2026-05-17 CSN8171 CGQ → ICN May 17, 10:15 UTCMay 17, 14:55 UTC4h 40m
2026-05-16 CSN336 AKL → CAN May 16, 08:05 UTCMay 16, 08:20 UTC15m
2026-05-15 CSN336 AKL → CAN May 15, 21:40 UTCMay 16, 07:20 UTC9h 41m
2026-05-15 CSN335 CAN → AKL May 15, 08:00 UTCMay 15, 18:15 UTC10h 14m
2026-05-14 CSN8066 IST → CAN May 14, 12:45 UTCMay 14, 16:30 UTC3h 45m
2026-05-14 CSN8065 CAN → IST May 14, 01:40 UTCMay 14, 03:35 UTC1h 55m
2026-05-12 CSN3082 BKK → CAN May 12, 09:05 UTCMay 12, 09:55 UTC50m
2026-05-12 CSN3081 CAN → BKK May 12, 06:20 UTCMay 12, 07:10 UTC50m
2026-05-10 CSN304 LHR → CAN May 10, 21:14 UTCMay 11, 03:20 UTC6h 5m
2026-05-10 CSN303 CAN → LHR May 10, 11:15 UTCMay 10, 18:15 UTC7h 0m
2026-05-09 CSN336 AKL → CAN May 9, 08:10 UTCMay 9, 08:40 UTC30m
2026-05-08 CSN336 AKL → CAN May 8, 21:20 UTCMay 9, 07:20 UTC10h 0m
2026-05-08 CSN335 CAN → AKL May 8, 08:05 UTCMay 8, 17:45 UTC9h 40m
2026-05-07 CSN8022 SHE → CAN May 7, 12:20 UTCMay 8, 01:40 UTC13h 20m
2026-05-06 CSN8021 SHE → FRA May 6, 13:30 UTCMay 7, 04:00 UTC14h 29m
2026-05-05 CSN3082 BKK → CAN May 5, 09:05 UTCMay 5, 09:30 UTC25m
2026-05-05 CSN3081 CAN → BKK May 5, 05:00 UTCMay 5, 07:10 UTC2h 10m
2026-05-04 CSN338 ICN → CAN May 4, 06:25 UTCMay 4, 07:05 UTC40m
2026-05-03 CSN8066 IST → CAN May 3, 12:30 UTCMay 4, 04:20 UTC15h 50m
2026-05-03 CSN8065 CAN → IST May 3, 02:00 UTCMay 3, 02:40 UTC40m
2026-05-02 CSN8065 CAN → IST May 2, 06:35 UTCMay 3, 02:40 UTC20h 5m
2026-05-02 CSN337 CAN → ICN May 2, 04:00 UTCMay 2, 04:45 UTC45m
2026-05-01 CSN338 ICN → CAN May 1, 06:35 UTCMay 1, 07:10 UTC35m
2026-04-30 CSN8066 IST → CAN Apr 30, 12:40 UTCMay 1, 04:45 UTC16h 5m
2026-04-30 CSN8065 CAN → IST Apr 30, 01:40 UTCApr 30, 03:00 UTC1h 20m
2026-04-27 CSN634 NBO → CAN Apr 27, 15:10 UTCApr 27, 18:00 UTC2h 50m
2026-04-26 CSN633 CAN → NBO Apr 26, 18:45 UTCApr 26, 22:15 UTC3h 30m
2026-04-25 CSN654 LGW → CGO Apr 25, 20:20 UTCApr 26, 02:35 UTC6h 15m

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

Mode-S 781945 frequently asked

What is Mode-S code 781945?
781945 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20EP.
Where is Mode-S 781945 registered?
Mode-S code 781945 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781945 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781945, octal 36014505, decimal 7,870,789.
What flights does 781945 operate?
Mode-S 781945 has broadcast 20 distinct callsigns, including CSN8066, CSN8065, CSN336, CSN680, CSN8172.