Apparatus

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sensors Mode-S transponder

781AA8

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-220K · BOEING 787-9 Dreamliner

Hex
781AA8
Octal
36015250
Decimal
7,871,144
Country
CN
Tail
B-220K
Type
B789
Transponder active on ground
Flights observed
210
Distinct callsigns
14
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 781AA8.

Country allocation

The ICAO 24-bit address 781AA8 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 14 distinct

Callsign Airline Flights Last seen
CSH870 - 51 2026-07-10
CSH869 - 40 2026-07-13
CSH885 - 30 2026-07-09
CSH871 Shanghai Airlines 16 2026-06-24
CSH895 - 13 2026-07-12
CSH872 - 12 2026-06-24
CSH821 - 11 2026-07-10
CSH896 - 9 2026-07-12
CSH898 - 8 2026-06-18
CSH897 - 8 2026-06-18
CSH886 - 6 2026-07-05
CSH822 - 4 2026-06-15
CSH802 Shanghai Airlines 1 2026-04-26
CSH801 Shanghai Airlines 1 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CSH869 - Jul 13, 09:30 UTCJul 14, 02:10 UTC16h 40m
2026-07-12 CSH896 - Jul 12, 13:15 UTCJul 13, 07:40 UTC18h 25m
2026-07-12 CSH895 KIX → HND Jul 12, 05:10 UTCJul 12, 11:50 UTC6h 40m
2026-07-10 CSH821 - Jul 10, 14:10 UTCJul 11, 08:55 UTC18h 45m
2026-07-10 CSH870 - Jul 10, 12:05 UTCJul 11, 08:55 UTC20h 50m
2026-07-10 CSH870 BUD → KIX Jul 10, 10:45 UTCJul 11, 08:55 UTC22h 11m
2026-07-09 CSH869 - Jul 9, 12:30 UTCJul 10, 05:05 UTC16h 35m
2026-07-09 CSH869 - Jul 9, 09:30 UTCJul 10, 05:05 UTC19h 35m
2026-07-09 CSH885 - Jul 9, 04:20 UTCJul 9, 08:10 UTC3h 50m
2026-07-08 CSH885 - Jul 8, 10:25 UTCJul 9, 08:10 UTC21h 45m
2026-07-07 CSH821 - Jul 7, 15:55 UTCJul 8, 09:10 UTC17h 15m
2026-07-07 CSH870 BUD → PVG Jul 7, 12:05 UTCJul 8, 09:10 UTC21h 5m
2026-07-07 CSH870 BUD → PVG Jul 7, 10:35 UTCJul 8, 09:10 UTC22h 35m
2026-07-06 CSH869 PVG → BUD Jul 6, 11:35 UTCJul 7, 04:45 UTC17h 10m
2026-07-06 CSH869 PVG → BUD Jul 6, 08:15 UTCJul 7, 04:45 UTC20h 30m
2026-07-05 CSH885 - Jul 5, 12:55 UTCJul 6, 06:25 UTC17h 30m
2026-07-05 CSH886 - Jul 5, 09:45 UTCJul 5, 10:00 UTC15m
2026-07-05 CSH885 - Jul 5, 04:10 UTCJul 5, 08:15 UTC4h 5m
2026-06-30 CSH886 - Jun 30, 08:40 UTCJun 30, 12:30 UTC3h 50m
2026-06-29 CSH870 BUD → PVG Jun 29, 12:05 UTCJun 30, 06:50 UTC18h 46m
2026-06-29 CSH870 BUD → PVG Jun 29, 10:44 UTCJun 30, 06:50 UTC20h 6m
2026-06-28 CSH869 PVG → BUD Jun 28, 10:15 UTCJun 29, 04:50 UTC18h 35m
2026-06-27 CSH821 - Jun 27, 16:20 UTCJun 28, 09:05 UTC16h 45m
2026-06-27 CSH870 BUD → PVG Jun 27, 12:04 UTCJun 28, 09:05 UTC21h 0m
2026-06-27 CSH870 BUD → PVG Jun 27, 11:00 UTCJun 28, 09:05 UTC22h 5m
2026-06-26 CSH869 PVG → BUD Jun 26, 10:05 UTCJun 27, 04:24 UTC18h 20m
2026-06-26 CSH869 PVG → BUD Jun 26, 08:30 UTCJun 27, 04:24 UTC19h 55m
2026-06-26 CSH895 - Jun 26, 05:05 UTCJun 26, 06:39 UTC1h 35m
2026-06-25 CSH895 - Jun 25, 07:19 UTCJun 26, 06:00 UTC22h 40m
2026-06-24 CSH872 - Jun 24, 21:40 UTCJun 25, 07:34 UTC9h 55m
2026-06-24 CSH872 - Jun 24, 16:24 UTCJun 24, 18:25 UTC2h 0m
2026-06-24 CSH871 PVG → MRS Jun 24, 08:49 UTCJun 24, 10:35 UTC1h 45m
2026-06-23 CSH871 PVG → MRS Jun 23, 19:24 UTCJun 24, 05:29 UTC10h 5m
2026-06-23 CSH871 PVG → MRS Jun 23, 08:20 UTCJun 24, 05:29 UTC21h 10m
2026-06-23 CSH885 - Jun 23, 02:29 UTCJun 23, 06:34 UTC4h 5m
2026-06-22 CSH885 - Jun 22, 10:19 UTCJun 23, 06:34 UTC20h 15m
2026-06-22 CSH821 - Jun 22, 07:49 UTCJun 22, 08:44 UTC55m
2026-06-21 CSH821 - Jun 21, 10:04 UTCJun 22, 08:44 UTC22h 40m
2026-06-21 CSH896 - Jun 21, 08:40 UTCJun 22, 08:00 UTC23h 20m
2026-06-20 CSH895 - Jun 20, 12:04 UTCJun 21, 06:24 UTC18h 20m
2026-06-20 CSH870 BUD → PVG Jun 20, 10:34 UTCJun 21, 06:24 UTC19h 50m
2026-06-19 CSH869 PVG → BUD Jun 19, 19:25 UTCJun 20, 04:24 UTC9h 0m
2026-06-19 CSH869 PVG → BUD Jun 19, 00:20 UTCJun 19, 22:55 UTC22h 35m
2026-06-18 CSH898 - Jun 18, 20:05 UTCJun 19, 19:39 UTC23h 34m
2026-06-18 CSH898 - Jun 18, 18:55 UTCJun 19, 00:59 UTC6h 4m
2026-06-18 CSH897 - Jun 18, 09:20 UTCJun 18, 15:50 UTC6h 30m
2026-06-17 CSH897 - Jun 17, 16:10 UTCJun 18, 15:50 UTC23h 40m
2026-06-17 CSH870 BUD → PVG Jun 17, 12:05 UTCJun 18, 10:05 UTC22h 0m
2026-06-17 CSH870 BUD → PVG Jun 17, 10:40 UTCJun 18, 10:00 UTC23h 20m
2026-06-16 CSH869 PVG → BUD Jun 16, 22:40 UTCJun 17, 04:50 UTC6h 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-220K page for operator, model, and routing details .

Mode-S 781AA8 frequently asked

What is Mode-S code 781AA8?
781AA8 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-220K.
Where is Mode-S 781AA8 registered?
Mode-S code 781AA8 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781AA8 broadcasting right now?
Mode-S 781AA8 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781AA8, octal 36015250, decimal 7,871,144.
What flights does 781AA8 operate?
Mode-S 781AA8 has broadcast 14 distinct callsigns, including CSH870, CSH869, CSH885, CSH871, CSH895.