Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 2d ago
Flights observed
122
Distinct callsigns
20
Country
CN
Last broadcast
2d 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
CSN6035 - 15 2026-07-11
CSN680 China Southern Airlines 9 2026-06-08
CSN6036 - 9 2026-07-11
CSN8172 China Southern Airlines 8 2026-06-30
CSN8066 China Southern Airlines 8 2026-05-23
CSN679 China Southern Airlines 8 2026-06-08
CSN8065 China Southern Airlines 7 2026-05-23
CSN336 China Southern Airlines 6 2026-05-25
CSN8171 - 4 2026-06-29
CSN6907 - 4 2026-06-28
CSN338 China Southern Airlines 4 2026-05-04
CSN6908 - 3 2026-06-27
CSN335 China Southern Airlines 3 2026-05-24
CSN3082 China Southern Airlines 3 2026-05-22
CSN3081 China Southern Airlines 3 2026-05-22
CSN654 China Southern Airlines 2 2026-05-26
CSN653 China Southern Airlines 2 2026-05-26
CSN634 China Southern Airlines 2 2026-05-30
CSN633 China Southern Airlines 2 2026-05-29
CSN608 - 2 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 CSN6036 - Jul 11, 22:35 UTCJul 12, 00:25 UTC1h 50m
2026-07-11 CSN6035 - Jul 11, 18:30 UTCJul 11, 18:55 UTC25m
2026-07-11 CSN6035 - Jul 11, 16:25 UTCJul 11, 17:50 UTC1h 25m
2026-07-09 CSN6036 - Jul 9, 22:50 UTCJul 10, 03:20 UTC4h 30m
2026-07-09 CSN6035 - Jul 9, 16:35 UTCJul 9, 17:55 UTC1h 20m
2026-07-07 CSN6036 - Jul 7, 22:35 UTCJul 8, 03:05 UTC4h 30m
2026-07-07 CSN6035 - Jul 7, 18:35 UTCJul 7, 20:50 UTC2h 15m
2026-07-04 CSN6036 - Jul 4, 22:35 UTCJul 5, 00:20 UTC1h 45m
2026-07-04 CSN6035 - Jul 4, 18:15 UTCJul 4, 18:40 UTC25m
2026-07-04 CSN6035 - Jul 4, 16:20 UTCJul 4, 17:40 UTC1h 20m
2026-07-02 CSN6036 - Jul 2, 22:30 UTCJul 3, 00:25 UTC1h 55m
2026-07-02 CSN6035 - Jul 2, 18:20 UTCJul 2, 18:45 UTC25m
2026-07-02 CSN6035 - Jul 2, 16:25 UTCJul 2, 17:45 UTC1h 20m
2026-06-30 CSN6036 - Jun 30, 22:40 UTCJul 1, 00:30 UTC1h 50m
2026-06-30 CSN6035 - Jun 30, 18:40 UTCJun 30, 19:00 UTC20m
2026-06-30 CSN6035 - Jun 30, 04:30 UTCJun 30, 18:05 UTC13h 35m
2026-06-30 CSN8172 ICN → CGQ Jun 30, 00:39 UTCJun 30, 00:55 UTC15m
2026-06-29 CSN8172 ICN → CGQ Jun 29, 17:45 UTCJun 29, 22:10 UTC4h 25m
2026-06-29 CSN8171 - Jun 29, 07:09 UTCJun 29, 14:50 UTC7h 40m
2026-06-28 CSN6907 - Jun 28, 12:29 UTCJun 28, 12:44 UTC15m
2026-06-27 CSN6036 - Jun 27, 22:40 UTCJun 27, 23:10 UTC30m
2026-06-27 CSN6035 - Jun 27, 18:39 UTCJun 27, 19:05 UTC25m
2026-06-27 CSN6035 - Jun 27, 16:39 UTCJun 27, 18:04 UTC1h 25m
2026-06-27 CSN6908 - Jun 27, 04:34 UTCJun 27, 04:54 UTC20m
2026-06-24 CSN608 - Jun 24, 18:39 UTCJun 25, 00:59 UTC6h 20m
2026-06-24 CSN607 - Jun 24, 07:50 UTCJun 24, 14:29 UTC6h 40m
2026-06-21 CSN608 - Jun 21, 18:35 UTCJun 22, 00:44 UTC6h 10m
2026-06-21 CSN607 - Jun 21, 07:45 UTCJun 21, 14:54 UTC7h 10m
2026-06-13 CSN354 - Jun 13, 09:00 UTCJun 13, 09:15 UTC15m
2026-06-13 CSN354 - Jun 13, 06:00 UTCJun 13, 06:25 UTC25m
2026-06-13 CSN353 - Jun 13, 03:35 UTCJun 13, 04:10 UTC35m
2026-06-11 CSN378 MAD → CAN Jun 11, 19:25 UTCJun 12, 00:15 UTC4h 50m
2026-06-11 CSN377 CAN → MAD Jun 11, 10:20 UTCJun 11, 15:45 UTC5h 25m
2026-06-10 CSN8172 ICN → CGQ Jun 10, 00:40 UTCJun 10, 00:55 UTC15m
2026-06-09 CSN8172 ICN → CGQ Jun 9, 18:50 UTCJun 9, 22:10 UTC3h 20m
2026-06-09 CSN8171 CGQ → ICN Jun 9, 07:15 UTCJun 9, 14:55 UTC7h 40m
2026-06-08 CSN680 IST → PKX Jun 8, 20:15 UTCJun 8, 20:30 UTC15m
2026-06-08 CSN680 IST → PKX Jun 8, 12:40 UTCJun 8, 17:20 UTC4h 40m
2026-06-08 CSN679 PKX → IST Jun 8, 02:40 UTCJun 8, 02:55 UTC15m
2026-06-07 CSN679 PKX → IST Jun 7, 17:30 UTCJun 7, 21:25 UTC3h 55m
2026-06-07 CSN6907 URC → PKX Jun 7, 12:10 UTCJun 7, 12:20 UTC10m
2026-06-06 CSN6036 IST → URC Jun 6, 22:30 UTCJun 7, 03:25 UTC4h 55m
2026-06-06 CSN6035 URC → IST Jun 6, 18:59 UTCJun 6, 19:24 UTC25m
2026-06-06 CSN6908 PKX → URC Jun 6, 04:25 UTCJun 6, 04:50 UTC25m
2026-06-05 CSN6907 URC → PKX Jun 5, 12:00 UTCJun 5, 12:15 UTC15m
2026-06-04 CSN6908 PKX → URC Jun 4, 04:25 UTCJun 4, 04:35 UTC10m
2026-06-03 CSN6907 URC → PKX Jun 3, 12:05 UTCJun 3, 12:20 UTC15m
2026-06-02 CSN6036 IST → URC Jun 2, 22:30 UTCJun 3, 03:10 UTC4h 40m
2026-06-02 CSN6035 URC → IST Jun 2, 18:55 UTCJun 2, 19:15 UTC20m
2026-06-02 CSN6035 URC → IST Jun 2, 13:35 UTCJun 2, 18:20 UTC4h 45m

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 2d 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 CSN6035, CSN680, CSN6036, CSN8172, CSN8066.