Apparatus

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sensors Mode-S transponder

781E83

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32CR · AIRBUS A-350-900

Hex
781E83
Octal
36017203
Decimal
7,872,131
Country
CN
Tail
B-32CR
Type
A359
No current signal · last broadcast Jul 26, 05:25 UTC
Flights observed
183
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 05:25 UTC

Last known position

Most recent position reported by Mode-S 781E83.

Country allocation

The ICAO 24-bit address 781E83 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
CSN674 China Southern Airlines 29 2026-07-26
CSN302 - 23 2026-07-08
CSN673 China Southern Airlines 20 2026-07-25
CSN306 China Southern Airlines 17 2026-06-27
CSN346 - 14 2026-07-13
CSN301 - 13 2026-07-08
CSN305 - 12 2026-06-26
CSN345 - 9 2026-07-12
CSN322 China Southern Airlines 8 2026-07-20
CSN321 China Southern Airlines 5 2026-07-19
CSN347 China Southern Airlines 4 2026-06-16
CSN6902 - 3 2026-07-11
CSN350 - 3 2026-06-26
CSN349 - 3 2026-06-26
CSN8050 China Southern Airlines 2 2026-07-21
CSN6901 China Southern Airlines 2 2026-05-20
CSN348 China Southern Airlines 2 2026-06-17
CSN316 - 2 2026-07-12
CSN315 - 2 2026-07-11
CSN8886 China Southern Airlines 1 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN674 LHR → PKX Jul 26, 05:15 UTCJul 26, 05:25 UTC10m
2026-07-25 CSN674 LHR → PKX Jul 25, 20:25 UTCJul 26, 02:35 UTC6h 10m
2026-07-25 CSN673 PKX → LHR Jul 25, 06:40 UTCJul 25, 16:35 UTC9h 55m
2026-07-24 CSN8886 SHA → PKX Jul 24, 15:20 UTCJul 24, 15:30 UTC10m
2026-07-24 CSN674 LHR → PKX Jul 24, 05:20 UTCJul 24, 05:30 UTC10m
2026-07-23 CSN674 LHR → PKX Jul 23, 20:10 UTCJul 24, 02:50 UTC6h 40m
2026-07-23 CSN673 PKX → LHR Jul 23, 06:55 UTCJul 23, 16:40 UTC9h 45m
2026-07-21 CSN8050 MEL → PKX Jul 21, 18:50 UTCJul 22, 13:55 UTC19h 5m
2026-07-21 CSN8050 MEL → PKX Jul 21, 17:00 UTCJul 22, 13:55 UTC20h 55m
2026-07-21 CSN8049 - Jul 21, 07:55 UTCJul 21, 14:35 UTC6h 40m
2026-07-20 CSN322 MEL → CAN Jul 20, 09:05 UTCJul 20, 09:25 UTC20m
2026-07-20 CSN322 MEL → CAN Jul 20, 00:30 UTCJul 20, 08:15 UTC7h 45m
2026-07-19 CSN321 CAN → MEL Jul 19, 14:10 UTCJul 19, 22:25 UTC8h 15m
2026-07-18 CSN304 LHR → CAN Jul 18, 21:30 UTCJul 19, 03:30 UTC6h 0m
2026-07-18 CSN303 - Jul 18, 10:55 UTCJul 18, 17:55 UTC7h 0m
2026-07-17 CSN674 - Jul 17, 05:25 UTCJul 17, 05:35 UTC10m
2026-07-16 CSN674 - Jul 16, 20:25 UTCJul 17, 02:59 UTC6h 35m
2026-07-16 CSN673 - Jul 16, 10:04 UTCJul 16, 16:44 UTC6h 40m
2026-07-16 CSN673 - Jul 16, 06:55 UTCJul 16, 07:05 UTC10m
2026-07-15 CSN674 - Jul 15, 05:35 UTCJul 15, 05:45 UTC10m
2026-07-14 CSN674 - Jul 14, 20:30 UTCJul 15, 03:05 UTC6h 34m
2026-07-14 CSN673 - Jul 14, 09:45 UTCJul 14, 16:25 UTC6h 40m
2026-07-14 CSN673 - Jul 14, 06:35 UTCJul 14, 06:45 UTC10m
2026-07-13 CSN346 - Jul 13, 04:40 UTCJul 13, 04:55 UTC15m
2026-07-12 CSN346 - Jul 12, 20:10 UTCJul 13, 02:15 UTC6h 5m
2026-07-12 CSN345 - Jul 12, 06:40 UTCJul 12, 16:10 UTC9h 30m
2026-07-12 CSN316 - Jul 12, 00:50 UTCJul 12, 01:15 UTC25m
2026-07-11 CSN315 - Jul 11, 22:10 UTCJul 11, 22:30 UTC20m
2026-07-11 CSN6902 - Jul 11, 08:05 UTCJul 11, 08:15 UTC10m
2026-07-10 - - Jul 10, 08:15 UTCJul 10, 08:25 UTC10m
2026-07-08 CSN302 - Jul 8, 20:50 UTCJul 8, 21:15 UTC25m
2026-07-08 CSN302 - Jul 8, 11:50 UTCJul 8, 20:00 UTC8h 10m
2026-07-08 CSN301 - Jul 8, 01:10 UTCJul 8, 09:15 UTC8h 5m
2026-07-07 CSN674 LHR → PKX Jul 7, 05:10 UTCJul 7, 05:30 UTC20m
2026-07-06 CSN674 LHR → PKX Jul 6, 20:20 UTCJul 7, 02:40 UTC6h 20m
2026-07-06 CSN673 - Jul 6, 06:40 UTCJul 6, 16:20 UTC9h 40m
2026-07-05 CSN346 - Jul 5, 04:15 UTCJul 5, 04:25 UTC10m
2026-07-04 CSN346 - Jul 4, 19:55 UTCJul 5, 01:50 UTC5h 55m
2026-07-04 CSN345 PEK → AMS Jul 4, 09:55 UTCJul 4, 16:15 UTC6h 20m
2026-07-04 CSN345 PEK → AMS Jul 4, 06:45 UTCJul 4, 06:55 UTC10m
2026-07-04 CSN316 - Jul 4, 00:50 UTCJul 4, 01:10 UTC20m
2026-07-03 CSN315 - Jul 3, 12:35 UTCJul 3, 12:55 UTC20m
2026-07-01 CSN674 LHR → PKX Jul 1, 20:25 UTCJul 2, 02:35 UTC6h 10m
2026-07-01 CSN673 - Jul 1, 06:50 UTCJul 1, 17:00 UTC10h 10m
2026-06-30 CSN346 - Jun 30, 04:30 UTCJun 30, 04:50 UTC20m
2026-06-29 CSN346 - Jun 29, 20:04 UTCJun 30, 01:55 UTC5h 51m
2026-06-29 CSN345 PEK → AMS Jun 29, 06:29 UTCJun 29, 16:10 UTC9h 40m
2026-06-28 CSN302 SYD → CAN Jun 28, 20:39 UTCJun 28, 21:04 UTC25m
2026-06-28 CSN302 SYD → CAN Jun 28, 12:05 UTCJun 28, 19:49 UTC7h 45m
2026-06-28 CSN301 - Jun 28, 01:40 UTCJun 28, 10:00 UTC8h 20m

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-32CR page for operator, model, and routing details .

Mode-S 781E83 frequently asked

What is Mode-S code 781E83?
781E83 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32CR.
Where is Mode-S 781E83 registered?
Mode-S code 781E83 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781E83 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781E83, octal 36017203, decimal 7,872,131.
What flights does 781E83 operate?
Mode-S 781E83 has broadcast 20 distinct callsigns, including CSN674, CSN302, CSN673, CSN306, CSN346.