Apparatus

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sensors Mode-S transponder

781371

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1261 · BOEING 737 MAX 8

Hex
781371
Octal
36011561
Decimal
7,869,297
Country
CN
Tail
B-1261
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
133
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781371.

Country allocation

The ICAO 24-bit address 781371 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
CSH831 - 17 2026-07-02
CSH9253 Shanghai Airlines 9 2026-06-10
CSH832 - 9 2026-07-02
CSH843 Shanghai Airlines 7 2026-07-06
CSH841 - 7 2026-06-29
CSH9255 - 6 2026-07-09
CSH877 - 5 2026-06-17
CSH858 - 5 2026-07-03
CSH856 - 5 2026-07-05
CSH853 - 5 2026-06-26
CSH866 - 4 2026-07-13
CSH863 - 4 2026-07-12
CSH862 Shanghai Airlines 4 2026-06-14
CSH861 - 4 2026-06-30
CSH840 - 4 2026-07-09
CSH811 Shanghai Airlines 4 2026-04-25
CSH865 - 3 2026-07-12
CSH857 - 3 2026-07-02
CSH855 - 3 2026-07-04
CSH842 - 3 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSH866 - Jul 13, 12:55 UTCJul 14, 11:40 UTC22h 45m
2026-07-12 CSH865 - Jul 12, 23:30 UTCJul 13, 11:30 UTC12h 0m
2026-07-12 CSH863 - Jul 12, 21:10 UTCJul 12, 21:35 UTC25m
2026-07-12 CSH863 - Jul 12, 12:40 UTCJul 12, 18:10 UTC5h 30m
2026-07-09 CSH840 - Jul 9, 18:30 UTCJul 9, 20:45 UTC2h 15m
2026-07-09 CSH9255 - Jul 9, 05:15 UTCJul 9, 17:00 UTC11h 45m
2026-07-08 CSH9255 - Jul 8, 15:35 UTCJul 9, 09:15 UTC17h 40m
2026-07-08 CSH866 - Jul 8, 12:30 UTCJul 9, 09:15 UTC20h 45m
2026-07-07 CSH864 - Jul 7, 23:15 UTCJul 8, 11:05 UTC11h 50m
2026-07-07 CSH863 - Jul 7, 10:15 UTCJul 7, 21:45 UTC11h 30m
2026-07-06 CSH844 SIN → PVG Jul 6, 19:50 UTCJul 7, 08:40 UTC12h 50m
2026-07-06 CSH843 PVG → SIN Jul 6, 08:45 UTCJul 6, 18:10 UTC9h 25m
2026-07-05 CSH843 PVG → SIN Jul 5, 14:55 UTCJul 6, 14:15 UTC23h 20m
2026-07-05 CSH856 - Jul 5, 12:50 UTCJul 6, 09:15 UTC20h 25m
2026-07-04 CSH855 - Jul 4, 18:10 UTCJul 5, 11:20 UTC17h 10m
2026-07-04 CSH855 - Jul 4, 14:55 UTCJul 5, 11:20 UTC20h 25m
2026-07-03 CSH858 - Jul 3, 18:55 UTCJul 4, 13:45 UTC18h 50m
2026-07-03 CSH858 - Jul 3, 16:20 UTCJul 4, 13:45 UTC21h 25m
2026-07-03 CSH858 - Jul 3, 14:45 UTCJul 4, 13:45 UTC23h 0m
2026-07-02 CSH857 - Jul 2, 20:20 UTCJul 3, 20:15 UTC23h 55m
2026-07-02 CSH857 - Jul 2, 18:20 UTCJul 3, 16:50 UTC22h 30m
2026-07-02 CSH832 - Jul 2, 17:45 UTCJul 3, 16:15 UTC22h 30m
2026-07-02 CSH831 - Jul 2, 03:40 UTCJul 2, 20:25 UTC16h 45m
2026-07-01 CSH831 - Jul 1, 17:20 UTCJul 2, 15:25 UTC22h 5m
2026-07-01 CSH7224 - Jul 1, 15:05 UTCJul 1, 15:20 UTC15m
2026-06-30 CSH7223 - Jun 30, 18:20 UTCJul 1, 13:55 UTC19h 35m
2026-06-30 CSH7223 - Jun 30, 18:10 UTCJul 1, 13:55 UTC19h 45m
2026-06-30 CSH861 - Jun 30, 05:00 UTCJun 30, 16:25 UTC11h 25m
2026-06-29 CSH841 - Jun 29, 17:40 UTCJun 29, 18:05 UTC25m
2026-06-29 CSH841 - Jun 29, 10:20 UTCJun 29, 16:44 UTC6h 25m
2026-06-28 CSH841 - Jun 28, 13:25 UTCJun 29, 10:55 UTC21h 30m
2026-06-27 CSH842 - Jun 27, 03:15 UTCJun 27, 14:05 UTC10h 50m
2026-06-26 CSH853 - Jun 26, 06:29 UTCJun 26, 14:59 UTC8h 30m
2026-06-25 CSH831 - Jun 25, 12:10 UTCJun 26, 04:24 UTC16h 15m
2026-06-25 CSH831 - Jun 25, 06:44 UTCJun 26, 04:24 UTC21h 40m
2026-06-25 CSH831 - Jun 25, 03:20 UTCJun 25, 20:30 UTC17h 10m
2026-06-24 CSH831 - Jun 24, 16:29 UTCJun 25, 14:39 UTC22h 10m
2026-06-24 CSH831 - Jun 24, 15:05 UTCJun 25, 14:14 UTC23h 10m
2026-06-24 CSH839 - Jun 24, 03:00 UTCJun 24, 13:34 UTC10h 35m
2026-06-22 CSH841 - Jun 22, 22:59 UTCJun 23, 18:25 UTC19h 25m
2026-06-22 CSH841 - Jun 22, 20:00 UTCJun 23, 18:14 UTC22h 15m
2026-06-22 CSH843 PVG → SIN Jun 22, 03:30 UTCJun 22, 18:19 UTC14h 50m
2026-06-21 CSH843 PVG → SIN Jun 21, 18:20 UTCJun 22, 18:15 UTC23h 55m
2026-06-21 CSH832 - Jun 21, 17:39 UTCJun 22, 15:10 UTC21h 30m
2026-06-21 CSH832 - Jun 21, 14:19 UTCJun 22, 14:14 UTC23h 55m
2026-06-21 CSH831 - Jun 21, 12:19 UTCJun 22, 06:45 UTC18h 25m
2026-06-21 CSH831 - Jun 21, 12:10 UTCJun 22, 06:45 UTC18h 35m
2026-06-20 CSH858 HKT → PVG Jun 20, 16:39 UTCJun 21, 14:30 UTC21h 50m
2026-06-20 CSH858 HKT → PVG Jun 20, 12:19 UTCJun 21, 12:14 UTC23h 55m
2026-06-20 CSH857 - Jun 20, 03:14 UTCJun 20, 19:19 UTC16h 5m

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-1261 page for operator, model, and routing details .

Mode-S 781371 frequently asked

What is Mode-S code 781371?
781371 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1261.
Where is Mode-S 781371 registered?
Mode-S code 781371 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781371 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781371, octal 36011561, decimal 7,869,297.
What flights does 781371 operate?
Mode-S 781371 has broadcast 20 distinct callsigns, including CSH831, CSH9253, CSH832, CSH843, CSH841.