Apparatus

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sensors Mode-S transponder

781B47

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-MBS · AIRBUS A-321neo

Hex
781B47
Octal
36015507
Decimal
7,871,303
Country
CN
Tail
B-MBS
Type
A21N
No current signal · last broadcast Jul 26, 20:05 UTC
Flights observed
415
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 20:05 UTC

Last known position

Most recent position reported by Mode-S 781B47.

Country allocation

The ICAO 24-bit address 781B47 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
AMU936 - 31 2026-07-15
AMU935 - 28 2026-07-15
AMU978 Air Macao 18 2026-07-23
AMU992 - 17 2026-06-29
AMU631 - 17 2026-07-20
AMU821 Air Macao 16 2026-07-25
AMU822 Air Macao 15 2026-07-25
AMU995 Air Macao 14 2026-07-21
AMU632 - 14 2026-07-20
AMU855 - 12 2026-07-11
AMU667 Air Macao 12 2026-07-26
AMU668 Air Macao 11 2026-07-26
AMU658 - 11 2026-07-12
AMU615 Air Macao 11 2026-07-26
AMU856 - 10 2026-07-11
AMU673 - 9 2026-06-25
AMU616 Air Macao 9 2026-07-26
AMU611 - 9 2026-07-08
AMU977 - 8 2026-07-05
AMU674 - 8 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AMU615 TPE → MFM Jul 26, 18:40 UTCJul 26, 20:05 UTC1h 25m
2026-07-26 AMU616 MFM → TPE Jul 26, 16:10 UTCJul 26, 17:35 UTC1h 25m
2026-07-26 AMU667 KHH → MFM Jul 26, 13:35 UTCJul 26, 14:10 UTC35m
2026-07-26 AMU668 MFM → KHH Jul 26, 11:15 UTCJul 26, 12:15 UTC1h 0m
2026-07-26 AMU221 HGH → MFM Jul 26, 08:25 UTCJul 26, 08:50 UTC25m
2026-07-25 AMU226 MFM → HGH Jul 25, 12:15 UTCJul 25, 12:30 UTC15m
2026-07-25 AMU821 ICN → MFM Jul 25, 05:40 UTCJul 25, 06:25 UTC45m
2026-07-25 AMU822 MFM → ICN Jul 25, 03:10 UTCJul 25, 03:55 UTC45m
2026-07-25 AMU822 MFM → ICN Jul 25, 00:50 UTCJul 25, 01:05 UTC15m
2026-07-24 AMU615 TPE → MFM Jul 24, 12:50 UTCJul 24, 14:00 UTC1h 10m
2026-07-24 AMU616 MFM → TPE Jul 24, 10:10 UTCJul 24, 11:30 UTC1h 20m
2026-07-24 AMU667 KHH → MFM Jul 24, 06:55 UTCJul 24, 07:55 UTC1h 0m
2026-07-24 AMU668 MFM → KHH Jul 24, 04:35 UTCJul 24, 05:40 UTC1h 5m
2026-07-23 AMU978 MFM → DAD Jul 23, 12:00 UTCJul 23, 12:15 UTC15m
2026-07-23 AMU951 MNL → MFM Jul 23, 07:40 UTCJul 23, 08:10 UTC30m
2026-07-23 AMU952 MFM → MNL Jul 23, 03:45 UTCJul 23, 05:25 UTC1h 40m
2026-07-22 AMU021 TAO → MFM Jul 22, 13:15 UTCJul 22, 14:25 UTC1h 10m
2026-07-22 AMU671 RMQ → MFM Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-22 AMU672 MFM → RMQ Jul 22, 02:00 UTCJul 22, 03:05 UTC1h 5m
2026-07-21 AMU986 MFM → DAD Jul 21, 13:45 UTCJul 21, 14:00 UTC15m
2026-07-21 AMU659 KHH → MFM Jul 21, 11:00 UTCJul 21, 12:00 UTC1h 0m
2026-07-21 AMU660 MFM → KHH Jul 21, 08:45 UTCJul 21, 09:55 UTC1h 10m
2026-07-21 AMU995 BKK → MFM Jul 21, 03:55 UTCJul 21, 04:30 UTC35m
2026-07-21 AMU996 - Jul 21, 00:35 UTCJul 21, 02:15 UTC1h 40m
2026-07-20 AMU949 HAN → MFM Jul 20, 18:10 UTCJul 20, 18:25 UTC15m
2026-07-20 AMU950 MFM → HAN Jul 20, 15:45 UTCJul 20, 15:55 UTC10m
2026-07-20 AMU950 MFM → HAN Jul 20, 14:55 UTCJul 20, 15:05 UTC10m
2026-07-20 AMU162 MFM → NGB Jul 20, 08:25 UTCJul 20, 13:25 UTC5h 0m
2026-07-20 AMU631 - Jul 20, 05:25 UTCJul 20, 06:05 UTC40m
2026-07-20 AMU632 - Jul 20, 02:50 UTCJul 20, 04:20 UTC1h 30m
2026-07-19 AMU978 MFM → DAD Jul 19, 13:15 UTCJul 19, 13:25 UTC10m
2026-07-19 AMU161 NGB → MFM Jul 19, 09:45 UTCJul 19, 11:05 UTC1h 20m
2026-07-19 AMU162 - Jul 19, 05:35 UTCJul 19, 06:55 UTC1h 20m
2026-07-18 AMU226 - Jul 18, 10:35 UTCJul 19, 03:10 UTC16h 35m
2026-07-18 AMU821 - Jul 18, 05:30 UTCJul 18, 08:25 UTC2h 55m
2026-07-18 AMU822 - Jul 18, 00:50 UTCJul 18, 04:00 UTC3h 11m
2026-07-17 AMU131 - Jul 17, 13:29 UTCJul 17, 14:10 UTC40m
2026-07-17 AMU132 - Jul 17, 10:35 UTCJul 17, 10:55 UTC20m
2026-07-17 AMU112 - Jul 17, 02:45 UTCJul 17, 08:20 UTC5h 35m
2026-07-16 AMU985 - Jul 16, 18:19 UTCJul 16, 18:34 UTC15m
2026-07-16 AMU995 - Jul 16, 03:40 UTCJul 16, 03:50 UTC10m
2026-07-16 AMU996 - Jul 16, 02:05 UTCJul 16, 02:20 UTC15m
2026-07-15 AMU978 - Jul 15, 12:20 UTCJul 15, 12:30 UTC10m
2026-07-15 AMU935 - Jul 15, 08:15 UTCJul 15, 08:30 UTC15m
2026-07-15 AMU936 - Jul 15, 06:00 UTCJul 15, 06:20 UTC20m
2026-07-15 AMU936 - Jul 15, 04:00 UTCJul 15, 04:10 UTC10m
2026-07-14 AMU978 - Jul 14, 12:00 UTCJul 14, 12:10 UTC10m
2026-07-14 AMU935 - Jul 14, 07:55 UTCJul 14, 08:15 UTC20m
2026-07-14 AMU936 - Jul 14, 05:55 UTCJul 14, 06:35 UTC40m
2026-07-14 AMU936 - Jul 14, 04:00 UTCJul 14, 04:10 UTC10m

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

Mode-S 781B47 frequently asked

What is Mode-S code 781B47?
781B47 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-MBS.
Where is Mode-S 781B47 registered?
Mode-S code 781B47 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B47 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B47, octal 36015507, decimal 7,871,303.
What flights does 781B47 operate?
Mode-S 781B47 has broadcast 20 distinct callsigns, including AMU936, AMU935, AMU978, AMU992, AMU631.