Apparatus

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sensors Mode-S transponder

781717

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-20CD · BOEING 787-9 Dreamliner

Hex
781717
Octal
36013427
Decimal
7,870,231
Country
CN
Tail
B-20CD
Type
B789
No current signal · last broadcast 2h ago
Flights observed
106
Distinct callsigns
19
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 781717.

Country allocation

The ICAO 24-bit address 781717 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 19 distinct

Callsign Airline Flights Last seen
CSH871 Shanghai Airlines 13 2026-05-15
CSH872 Shanghai Airlines 12 2026-05-15
CSH895 Shanghai Airlines 10 2026-04-30
CES737 China Eastern Airlines 10 2026-05-27
CES740 China Eastern Airlines 9 2026-05-26
CES739 China Eastern Airlines 9 2026-05-29
CSH869 Shanghai Airlines 7 2026-05-23
CES738 China Eastern Airlines 7 2026-05-28
CSH885 Shanghai Airlines 6 2026-05-22
CSH870 Shanghai Airlines 6 2026-05-24
CSH821 Shanghai Airlines 4 2026-05-29
CSH896 Shanghai Airlines 3 2026-04-22
CSH898 Shanghai Airlines 2 2026-05-04
CSH897 Shanghai Airlines 2 2026-05-04
CSH886 Shanghai Airlines 2 2026-05-09
CSH892 Shanghai Airlines 1 2026-04-18
CSH891 Shanghai Airlines 1 2026-04-18
CSH816 Shanghai Airlines 1 2026-05-12
CSH815 Shanghai Airlines 1 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CES739 PVG → MEL May 29, 10:25 UTCMay 29, 22:50 UTC12h 26m
2026-05-29 CSH821 PVG → KIX May 29, 08:05 UTCMay 29, 08:55 UTC50m
2026-05-28 CSH821 PVG → KIX May 28, 10:10 UTCMay 29, 08:55 UTC22h 45m
2026-05-28 CES738 MEL → PVG May 28, 01:40 UTCMay 28, 10:35 UTC8h 55m
2026-05-27 CES737 PVG → MEL May 27, 13:05 UTCMay 27, 22:50 UTC9h 45m
2026-05-26 CES737 PVG → MEL May 26, 20:24 UTCMay 27, 18:55 UTC22h 30m
2026-05-26 CES740 MEL → PVG May 26, 18:14 UTCMay 27, 15:25 UTC21h 10m
2026-05-26 CES740 MEL → PVG May 26, 15:00 UTCMay 27, 13:35 UTC22h 35m
2026-05-26 CES740 MEL → PVG May 26, 11:34 UTCMay 26, 20:29 UTC8h 55m
2026-05-26 CES739 PVG → MEL May 26, 01:30 UTCMay 26, 02:00 UTC30m
2026-05-24 CSH870 BUD → PVG May 24, 10:30 UTCMay 24, 16:30 UTC6h 0m
2026-05-23 CSH869 PVG → BUD May 23, 09:50 UTCMay 24, 04:55 UTC19h 6m
2026-05-23 CSH869 PVG → BUD May 23, 09:30 UTCMay 24, 04:55 UTC19h 26m
2026-05-22 CSH885 PVG → KUL May 22, 14:00 UTCMay 23, 07:50 UTC17h 49m
2026-05-22 CSH870 BUD → PVG May 22, 11:50 UTCMay 23, 07:50 UTC20h 0m
2026-05-22 CSH870 BUD → PVG May 22, 10:50 UTCMay 23, 07:50 UTC20h 59m
2026-05-21 CSH869 PVG → BUD May 21, 10:30 UTCMay 22, 04:45 UTC18h 15m
2026-05-21 CSH869 PVG → BUD May 21, 08:15 UTCMay 22, 04:45 UTC20h 30m
2026-05-21 CSH869 PVG → BUD May 21, 05:05 UTCMay 22, 03:45 UTC22h 40m
2026-05-21 CSH869 PVG → BUD May 21, 01:50 UTCMay 22, 01:45 UTC23h 55m
2026-05-21 CES738 MEL → PVG May 21, 01:20 UTCMay 21, 23:00 UTC21h 40m
2026-05-20 CES737 PVG → MEL May 20, 08:30 UTCMay 20, 22:35 UTC14h 5m
2026-05-19 CES740 MEL → PVG May 19, 11:50 UTCMay 20, 06:45 UTC18h 56m
2026-05-18 CES739 PVG → MEL May 18, 17:10 UTCMay 19, 02:00 UTC8h 49m
2026-05-15 CSH872 MRS → PVG May 15, 21:00 UTCMay 16, 03:30 UTC6h 30m
2026-05-15 CSH872 MRS → PVG May 15, 16:35 UTCMay 15, 18:15 UTC1h 40m
2026-05-15 CSH871 PVG → MRS May 15, 08:55 UTCMay 15, 11:00 UTC2h 5m
2026-05-14 CSH871 PVG → MRS May 14, 22:35 UTCMay 15, 05:50 UTC7h 15m
2026-05-14 CSH871 PVG → MRS May 14, 10:15 UTCMay 15, 05:50 UTC19h 35m
2026-05-13 CSH870 BUD → PVG May 13, 14:20 UTCMay 14, 08:55 UTC18h 35m
2026-05-13 CSH870 BUD → PVG May 13, 11:50 UTCMay 14, 08:55 UTC21h 5m
2026-05-13 CSH870 BUD → PVG May 13, 10:50 UTCMay 14, 08:55 UTC22h 5m
2026-05-12 CSH869 PVG → BUD May 12, 13:05 UTCMay 13, 05:10 UTC16h 5m
2026-05-12 CSH816 HND → SHA May 12, 06:00 UTCMay 12, 11:55 UTC5h 55m
2026-05-11 CSH815 SHA → HND May 11, 12:25 UTCMay 12, 04:45 UTC16h 21m
2026-05-10 CSH872 MRS → PVG May 10, 21:00 UTCMay 11, 11:15 UTC14h 15m
2026-05-10 CSH872 MRS → PVG May 10, 16:40 UTCMay 10, 18:25 UTC1h 45m
2026-05-10 CSH871 PVG → MRS May 10, 09:05 UTCMay 10, 11:15 UTC2h 10m
2026-05-09 CSH871 PVG → MRS May 9, 12:05 UTCMay 10, 06:15 UTC18h 10m
2026-05-09 CSH871 PVG → MRS May 9, 11:35 UTCMay 10, 06:15 UTC18h 40m
2026-05-09 CSH886 KUL → PVG May 9, 08:25 UTCMay 9, 08:45 UTC20m
2026-05-08 CSH885 PVG → KUL May 8, 12:10 UTCMay 9, 06:45 UTC18h 35m
2026-05-08 CSH885 PVG → KUL May 8, 08:24 UTCMay 9, 06:45 UTC22h 20m
2026-05-07 CES740 MEL → PVG May 7, 11:55 UTCMay 8, 06:35 UTC18h 40m
2026-05-06 CES739 PVG → MEL May 6, 08:15 UTCMay 7, 02:05 UTC17h 49m
2026-05-06 CES739 PVG → MEL May 6, 05:05 UTCMay 7, 02:05 UTC20h 59m
2026-05-06 CES738 MEL → PVG May 6, 01:15 UTCMay 6, 22:40 UTC21h 24m
2026-05-05 CES737 PVG → MEL May 5, 13:20 UTCMay 5, 22:40 UTC9h 20m
2026-05-05 CES737 PVG → MEL May 5, 00:15 UTCMay 5, 22:40 UTC22h 25m
2026-05-04 CSH898 BUD → NGB May 4, 19:50 UTCMay 5, 19:00 UTC23h 10m

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-20CD page for operator, model, and routing details .

Mode-S 781717 frequently asked

What is Mode-S code 781717?
781717 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-20CD.
Where is Mode-S 781717 registered?
Mode-S code 781717 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781717 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781717, octal 36013427, decimal 7,870,231.
What flights does 781717 operate?
Mode-S 781717 has broadcast 19 distinct callsigns, including CSH871, CSH872, CSH895, CES737, CES740.