Apparatus

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sensors Mode-S transponder

781361

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1243 · BOEING 787-9 Dreamliner

Hex
781361
Octal
36011541
Decimal
7,869,281
Country
CN
Tail
B-1243
Type
B789
Broadcasting now · callsign CSN679 · 16,725 ft
Flights observed
153
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 22:05 UTC

Current position

781361 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781361 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
CSN8172 China Southern Airlines 24 2026-07-26
CSN8171 China Southern Airlines 16 2026-07-26
CSN679 China Southern Airlines 11 2026-07-25
CSN680 China Southern Airlines 8 2026-07-25
CSN634 - 7 2026-07-04
CSN3092 China Southern Airlines 7 2026-05-12
CSN304 - 7 2026-07-02
CSN8066 - 6 2026-07-07
CSN354 - 6 2026-06-23
CSN303 - 6 2026-07-02
CSN8065 - 5 2026-07-07
CSN633 - 5 2026-07-03
CSN608 China Southern Airlines 4 2026-05-31
CSN607 China Southern Airlines 4 2026-05-31
CSN336 - 4 2026-07-06
CSN8069 China Southern Airlines 3 2026-05-05
CSN689 China Southern Airlines 3 2026-05-06
CSN8070 China Southern Airlines 2 2026-04-14
CSN6908 China Southern Airlines 2 2026-07-24
CSN6907 China Southern Airlines 2 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN8172 ICN → CGQ Jul 26, 17:45 UTCJul 26, 22:05 UTC4h 20m
2026-07-26 CSN8171 CGQ → ICN Jul 26, 12:20 UTCJul 26, 14:55 UTC2h 35m
2026-07-26 CSN8171 CGQ → ICN Jul 26, 07:25 UTCJul 26, 07:40 UTC15m
2026-07-25 CSN680 IST → PKX Jul 25, 20:30 UTCJul 25, 20:45 UTC15m
2026-07-25 CSN680 IST → PKX Jul 25, 13:00 UTCJul 25, 14:45 UTC1h 45m
2026-07-25 CSN679 PKX → IST Jul 25, 02:25 UTCJul 25, 02:40 UTC15m
2026-07-24 CSN679 PKX → IST Jul 24, 17:40 UTCJul 25, 01:45 UTC8h 5m
2026-07-24 CSN6907 URC → PKX Jul 24, 13:10 UTCJul 24, 13:30 UTC20m
2026-07-24 CSN6908 PKX → URC Jul 24, 04:30 UTCJul 24, 04:40 UTC10m
2026-07-24 CSN8172 ICN → CGQ Jul 24, 00:35 UTCJul 24, 00:45 UTC10m
2026-07-23 CSN8172 ICN → CGQ Jul 23, 17:45 UTCJul 23, 22:10 UTC4h 25m
2026-07-23 CSN8171 CGQ → ICN Jul 23, 07:25 UTCJul 23, 14:55 UTC7h 30m
2026-07-22 CSN6907 URC → PKX Jul 22, 15:05 UTCJul 22, 15:15 UTC10m
2026-07-22 CSN8172 ICN → CGQ Jul 22, 00:30 UTCJul 22, 00:45 UTC15m
2026-07-21 CSN8172 ICN → CGQ Jul 21, 17:40 UTCJul 21, 22:00 UTC4h 20m
2026-07-21 CSN8171 - Jul 21, 10:30 UTCJul 21, 15:05 UTC4h 35m
2026-07-20 CSN680 - Jul 20, 20:05 UTCJul 20, 20:20 UTC15m
2026-07-20 CSN680 - Jul 20, 12:55 UTCJul 20, 14:45 UTC1h 50m
2026-07-20 CSN679 PKX → IST Jul 20, 01:10 UTCJul 20, 02:35 UTC1h 25m
2026-07-19 CSN679 PKX → IST Jul 19, 17:35 UTCJul 19, 17:45 UTC10m
2026-07-19 CSN8172 ICN → CGQ Jul 19, 00:30 UTCJul 19, 00:45 UTC15m
2026-07-18 CSN8172 ICN → CGQ Jul 18, 17:40 UTCJul 18, 18:15 UTC35m
2026-07-18 CSN8171 - Jul 18, 10:40 UTCJul 18, 15:15 UTC4h 35m
2026-07-17 CSN8172 ICN → CGQ Jul 17, 00:45 UTCJul 17, 01:00 UTC15m
2026-07-16 CSN8172 ICN → CGQ Jul 16, 17:54 UTCJul 16, 22:19 UTC4h 25m
2026-07-16 CSN8171 - Jul 16, 07:20 UTCJul 16, 14:55 UTC7h 35m
2026-07-14 CSN680 - Jul 14, 12:50 UTCJul 14, 20:25 UTC7h 35m
2026-07-14 CSN679 - Jul 14, 02:35 UTCJul 14, 03:00 UTC25m
2026-07-13 CSN679 - Jul 13, 17:40 UTCJul 14, 02:00 UTC8h 20m
2026-07-13 CSN8172 - Jul 13, 01:30 UTCJul 13, 01:40 UTC10m
2026-07-12 CSN8172 - Jul 12, 18:50 UTCJul 12, 23:05 UTC4h 15m
2026-07-12 CSN8171 - Jul 12, 07:20 UTCJul 12, 14:55 UTC7h 35m
2026-07-12 CSN8172 - Jul 12, 02:01 UTCJul 12, 02:15 UTC15m
2026-07-11 CSN8172 - Jul 11, 19:10 UTCJul 11, 23:30 UTC4h 20m
2026-07-11 CSN8171 - Jul 11, 07:35 UTCJul 11, 15:10 UTC7h 35m
2026-07-10 CSN3115 - Jul 10, 10:40 UTCJul 10, 11:05 UTC25m
2026-07-10 CSN8172 - Jul 10, 00:30 UTCJul 10, 00:50 UTC20m
2026-07-09 CSN8172 - Jul 9, 17:50 UTCJul 9, 22:05 UTC4h 15m
2026-07-09 CSN8171 - Jul 9, 07:20 UTCJul 9, 15:10 UTC7h 50m
2026-07-07 CSN8066 - Jul 7, 11:40 UTCJul 7, 13:25 UTC1h 45m
2026-07-07 CSN8065 - Jul 7, 01:35 UTCJul 7, 03:30 UTC1h 55m
2026-07-06 CSN336 - Jul 6, 07:55 UTCJul 6, 08:15 UTC20m
2026-07-05 CSN336 - Jul 5, 21:05 UTCJul 6, 07:10 UTC10h 5m
2026-07-05 CSN335 ZGN → AKL Jul 5, 07:55 UTCJul 5, 17:40 UTC9h 45m
2026-07-04 CSN634 - Jul 4, 15:25 UTCJul 4, 19:55 UTC4h 30m
2026-07-03 CSN633 - Jul 3, 19:45 UTCJul 3, 23:05 UTC3h 20m
2026-07-03 CSN633 - Jul 3, 02:40 UTCJul 3, 23:05 UTC20h 25m
2026-07-03 CSN633 - Jul 3, 00:20 UTCJul 3, 23:05 UTC22h 45m
2026-07-02 CSN304 - Jul 2, 22:20 UTCJul 3, 21:25 UTC23h 5m
2026-07-02 CSN304 - Jul 2, 21:20 UTCJul 3, 20:15 UTC22h 55m

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-1243 page for operator, model, and routing details .

Mode-S 781361 frequently asked

What is Mode-S code 781361?
781361 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1243.
Where is Mode-S 781361 registered?
Mode-S code 781361 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781361 broadcasting right now?
Yes. Mode-S 781361 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781361, octal 36011541, decimal 7,869,281.
What flights does 781361 operate?
Mode-S 781361 has broadcast 20 distinct callsigns, including CSN8172, CSN8171, CSN679, CSN680, CSN634.