sensors Mode-S transponder

781509

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-205Y · BOEING 737-800

Hex
781509
Octal
36012411
Decimal
7,869,705
Country
CN
Tail
B-205Y
Type
B738
No current signal · last broadcast 2d ago
Flights observed
47
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781509.

Country allocation

The ICAO 24-bit address 781509 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
CSH805 - 6 2026-06-13
CSH827 Shanghai Airlines 5 2026-06-10
CSH809 - 4 2026-06-18
CSH855 Shanghai Airlines 3 2026-05-29
CSH828 Shanghai Airlines 3 2026-05-23
CSH810 - 3 2026-06-18
CSH9333 Shanghai Airlines 2 2026-05-10
CSH9253 - 2 2026-06-17
CSH856 Shanghai Airlines 2 2026-05-29
CSH854 Shanghai Airlines 2 2026-05-28
CSH806 Shanghai Airlines 2 2026-06-13
CSH9549 - 1 2026-04-26
CSH9539 Shanghai Airlines 1 2026-06-02
CSH9334 Shanghai Airlines 1 2026-05-10
CSH9255 Shanghai Airlines 1 2026-04-29
CSH9254 Shanghai Airlines 1 2026-05-13
CSH853 Shanghai Airlines 1 2026-05-27
CSH852 - 1 2026-06-16
CSH841 Shanghai Airlines 1 2026-05-26
CSH831 Shanghai Airlines 1 2026-06-11

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-06-18 CSH810 - Jun 18, 13:30 UTCJun 18, 14:25 UTC55m
2026-06-18 CSH809 - Jun 18, 10:40 UTCJun 18, 11:40 UTC1h 0m
2026-06-17 CSH9253 - Jun 17, 11:05 UTCJun 17, 14:00 UTC2h 55m
2026-06-16 CSH809 - Jun 16, 09:40 UTCJun 16, 10:30 UTC50m
2026-06-16 CSH852 - Jun 16, 03:25 UTCJun 16, 04:00 UTC35m
2026-06-15 CSH810 HKG → SHA Jun 15, 11:39 UTCJun 16, 01:50 UTC14h 10m
2026-06-15 CSH809 - Jun 15, 09:10 UTCJun 15, 09:25 UTC15m
2026-06-13 CSH806 MFM → PVG Jun 13, 06:25 UTCJun 13, 07:20 UTC55m
2026-06-13 CSH805 - Jun 13, 03:35 UTCJun 13, 05:05 UTC1h 29m
2026-06-12 CSH805 - Jun 12, 08:50 UTCJun 13, 05:05 UTC20h 14m
2026-06-12 CSH829 - Jun 12, 06:40 UTCJun 12, 07:05 UTC25m
2026-06-11 CSH831 PVG → HKT Jun 11, 05:50 UTCJun 11, 20:20 UTC14h 30m
2026-06-11 CSH805 PVG → MFM Jun 11, 03:00 UTCJun 11, 04:20 UTC1h 20m
2026-06-10 CSH805 PVG → MFM Jun 10, 09:40 UTCJun 11, 04:20 UTC18h 40m
2026-06-10 CSH827 PVG → ICN Jun 10, 07:50 UTCJun 10, 08:25 UTC35m
2026-06-09 CSH806 MFM → PVG Jun 9, 05:40 UTCJun 9, 06:45 UTC1h 5m
2026-06-09 CSH805 PVG → MFM Jun 9, 04:00 UTCJun 9, 04:15 UTC15m
2026-06-09 CSH805 PVG → MFM Jun 9, 02:50 UTCJun 9, 03:25 UTC35m
2026-06-02 CSH9539 PVG → SYX Jun 2, 03:00 UTCJun 2, 07:55 UTC4h 55m
2026-05-29 CSH856 BKK → PVG May 29, 12:35 UTCMay 29, 14:10 UTC1h 35m
2026-05-29 CSH855 PVG → BKK May 29, 02:40 UTCMay 29, 10:40 UTC8h 0m
2026-05-28 CSH854 BKK → PVG May 28, 06:30 UTCMay 29, 02:40 UTC20h 10m
2026-05-28 CSH854 BKK → PVG May 28, 05:05 UTCMay 29, 02:40 UTC21h 35m
2026-05-27 CSH853 PVG → BKK May 27, 04:59 UTCMay 27, 14:35 UTC9h 36m
2026-05-26 CSH841 CGQ → PVG May 26, 15:54 UTCMay 26, 18:14 UTC2h 20m
2026-05-24 CSH856 BKK → PVG May 24, 12:50 UTCMay 25, 03:25 UTC14h 35m
2026-05-24 CSH855 PVG → BKK May 24, 08:55 UTCMay 24, 11:20 UTC2h 25m
2026-05-23 CSH855 PVG → BKK May 23, 10:20 UTCMay 24, 09:15 UTC22h 55m
2026-05-23 CSH828 ICN → PVG May 23, 09:55 UTCMay 23, 10:20 UTC25m
2026-05-23 CSH827 PVG → ICN May 23, 08:00 UTCMay 23, 08:35 UTC35m
2026-05-21 CSH828 ICN → PVG May 21, 09:40 UTCMay 21, 10:20 UTC40m
2026-05-21 CSH827 PVG → ICN May 21, 07:55 UTCMay 21, 08:30 UTC35m
2026-05-20 CSH827 PVG → ICN May 20, 09:05 UTCMay 21, 08:15 UTC23h 10m
2026-05-16 CSH828 ICN → PVG May 16, 09:45 UTCMay 17, 03:00 UTC17h 15m
2026-05-16 CSH827 PVG → ICN May 16, 07:55 UTCMay 16, 08:36 UTC40m
2026-05-13 CSH9254 HAK → SHA May 13, 14:25 UTCMay 13, 15:25 UTC1h 0m
2026-05-13 CSH9253 SHA → HAK May 13, 10:40 UTCMay 13, 11:05 UTC25m
2026-05-10 CSH9334 SZX → SHA May 10, 10:35 UTCMay 10, 10:45 UTC10m
2026-05-10 CSH9333 SHA → SZX May 10, 06:55 UTCMay 10, 07:15 UTC20m
2026-05-07 CSH818 MFM → SHA May 7, 05:50 UTCMay 7, 06:10 UTC20m
2026-05-07 CSH817 SHA → MFM May 7, 03:35 UTCMay 7, 03:45 UTC10m
2026-05-06 CSH810 HKG → SHA May 6, 11:15 UTCMay 6, 12:20 UTC1h 5m
2026-05-06 CSH809 SHA → HKG May 6, 09:00 UTCMay 6, 09:30 UTC30m
2026-05-04 CSH9333 SHA → SZX May 4, 07:00 UTCMay 4, 07:20 UTC20m
2026-04-29 CSH9255 PVG → HAK Apr 29, 02:20 UTCApr 29, 07:45 UTC5h 25m
2026-04-26 CSH9549 - Apr 26, 08:00 UTCApr 26, 08:10 UTC10m
2026-04-21 CSH813 FOC → KUL Apr 21, 07:30 UTCApr 21, 08:20 UTC50m

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-205Y page for operator, model, and routing details .

Mode-S 781509 frequently asked

What is Mode-S code 781509?
781509 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-205Y.
Where is Mode-S 781509 registered?
Mode-S code 781509 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781509 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 781509, octal 36012411, decimal 7,869,705.
What flights does 781509 operate?
Mode-S 781509 has broadcast 20 distinct callsigns, including CSH805, CSH827, CSH809, CSH855, CSH828.