Apparatus

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sensors Mode-S transponder

781B48

ICAO 24-bit transponder address · allocated to China

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

Hex
781B48
Octal
36015510
Decimal
7,871,304
Country
CN
Tail
B-MBT
Type
A21N
No current signal · last broadcast 51m ago
Flights observed
179
Distinct callsigns
20
Country
CN
Last broadcast
51m ago

Last known position

Most recent position reported by Mode-S 781B48.

Country allocation

The ICAO 24-bit address 781B48 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
AMU861 Air Macao 13 2026-05-29
AMU657 Air Macao 13 2026-05-30
AMU862 Air Macao 12 2026-05-29
AMU658 Air Macao 12 2026-05-29
AMU936 Air Macao 10 2026-05-30
AMU992 Air Macao 9 2026-05-23
AMU935 Air Macao 8 2026-05-30
AMU855 Air Macao 6 2026-05-15
AMU612 Air Macao 6 2026-05-25
AMU611 Air Macao 6 2026-05-25
AMU996 Air Macao 5 2026-05-10
AMU995 Air Macao 5 2026-05-24
AMU907 Air Macao 4 2026-04-24
AMU856 Air Macao 4 2026-05-15
AMU660 Air Macao 4 2026-05-24
AMU659 Air Macao 4 2026-05-24
AMU991 Air Macao 3 2026-05-03
AMU908 Air Macao 3 2026-04-24
AMU826 Air Macao 3 2026-04-14
AMU668 Air Macao 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AMU935 BKK → MFM May 30, 08:00 UTCMay 30, 09:40 UTC1h 40m
2026-05-30 AMU936 MFM → BKK May 30, 04:40 UTCMay 30, 06:35 UTC1h 55m
2026-05-30 AMU936 MFM → BKK May 30, 03:55 UTCMay 30, 04:05 UTC10m
2026-05-30 AMU657 KHH → MFM May 30, 01:00 UTCMay 30, 02:00 UTC1h 0m
2026-05-29 AMU658 MFM → KHH May 29, 14:05 UTCMay 29, 15:05 UTC1h 0m
2026-05-29 AMU861 NRT → MFM May 29, 07:25 UTCMay 29, 11:35 UTC4h 10m
2026-05-29 AMU862 MFM → NRT May 29, 01:50 UTCMay 29, 05:50 UTC4h 0m
2026-05-28 - - May 28, 10:15 UTCMay 28, 10:25 UTC10m
2026-05-28 AMU935 BKK → MFM May 28, 07:55 UTCMay 28, 09:30 UTC1h 35m
2026-05-28 AMU936 MFM → BKK May 28, 04:25 UTCMay 28, 06:05 UTC1h 40m
2026-05-28 AMU657 KHH → MFM May 28, 01:15 UTCMay 28, 02:10 UTC55m
2026-05-27 AMU658 MFM → KHH May 27, 13:50 UTCMay 27, 14:55 UTC1h 5m
2026-05-27 AMU667 KHH → MFM May 27, 07:15 UTCMay 27, 08:15 UTC1h 0m
2026-05-27 AMU668 MFM → KHH May 27, 04:49 UTCMay 27, 05:59 UTC1h 10m
2026-05-25 AMU977 DAD → MFM May 25, 15:50 UTCMay 25, 16:00 UTC10m
2026-05-25 AMU611 TPE → MFM May 25, 07:05 UTCMay 25, 08:25 UTC1h 20m
2026-05-25 AMU612 MFM → TPE May 25, 05:10 UTCMay 25, 05:45 UTC35m
2026-05-25 AMU612 MFM → TPE May 25, 04:15 UTCMay 25, 04:35 UTC20m
2026-05-25 AMU657 KHH → MFM May 25, 01:55 UTCMay 25, 02:05 UTC10m
2026-05-24 AMU658 MFM → KHH May 24, 13:45 UTCMay 24, 14:50 UTC1h 5m
2026-05-24 AMU659 KHH → MFM May 24, 11:00 UTCMay 24, 12:10 UTC1h 10m
2026-05-24 AMU660 MFM → KHH May 24, 08:50 UTCMay 24, 09:55 UTC1h 5m
2026-05-24 AMU995 BKK → MFM May 24, 04:20 UTCMay 24, 04:55 UTC35m
2026-05-23 AMU992 MFM → BKK May 23, 13:00 UTCMay 23, 13:45 UTC45m
2026-05-23 AMU992 MFM → BKK May 23, 11:20 UTCMay 23, 11:30 UTC10m
2026-05-23 AMU611 TPE → MFM May 23, 07:10 UTCMay 23, 08:35 UTC1h 25m
2026-05-23 AMU612 MFM → TPE May 23, 05:20 UTCMay 23, 06:00 UTC40m
2026-05-23 AMU612 MFM → TPE May 23, 04:35 UTCMay 23, 04:45 UTC10m
2026-05-23 AMU657 KHH → MFM May 23, 01:05 UTCMay 23, 02:25 UTC1h 20m
2026-05-22 AMU658 MFM → KHH May 22, 14:05 UTCMay 22, 15:00 UTC55m
2026-05-22 AMU659 KHH → MFM May 22, 11:40 UTCMay 22, 12:30 UTC50m
2026-05-22 AMU660 MFM → KHH May 22, 09:05 UTCMay 22, 10:15 UTC1h 10m
2026-05-22 AMU221 HGH → MFM May 22, 03:25 UTCMay 22, 03:40 UTC15m
2026-05-21 AMU226 MFM → HGH May 21, 10:15 UTCMay 21, 10:30 UTC15m
2026-05-21 AMU611 TPE → MFM May 21, 07:55 UTCMay 21, 08:10 UTC15m
2026-05-21 AMU611 TPE → MFM May 21, 06:55 UTCMay 21, 07:25 UTC30m
2026-05-21 AMU612 MFM → TPE May 21, 04:15 UTCMay 21, 05:45 UTC1h 30m
2026-05-20 AMU621 TPE → MFM May 20, 14:35 UTCMay 20, 15:55 UTC1h 20m
2026-05-20 AMU622 MFM → TPE May 20, 12:10 UTCMay 20, 13:35 UTC1h 25m
2026-05-20 AMU182 MFM → CKG May 20, 04:15 UTCMay 20, 04:30 UTC15m
2026-05-18 AMU621 TPE → MFM May 18, 14:20 UTCMay 18, 15:40 UTC1h 20m
2026-05-18 AMU622 MFM → TPE May 18, 11:45 UTCMay 18, 13:15 UTC1h 30m
2026-05-18 AMU611 TPE → MFM May 18, 08:20 UTCMay 18, 08:45 UTC25m
2026-05-18 AMU611 TPE → MFM May 18, 07:20 UTCMay 18, 07:50 UTC30m
2026-05-18 AMU612 MFM → TPE May 18, 04:45 UTCMay 18, 06:01 UTC1h 15m
2026-05-18 AMU657 KHH → MFM May 18, 01:10 UTCMay 18, 02:25 UTC1h 15m
2026-05-17 AMU658 MFM → KHH May 17, 13:55 UTCMay 17, 15:05 UTC1h 10m
2026-05-17 AMU935 BKK → MFM May 17, 07:50 UTCMay 17, 08:20 UTC30m
2026-05-17 AMU936 MFM → BKK May 17, 06:00 UTCMay 17, 06:25 UTC25m
2026-05-17 AMU936 MFM → BKK May 17, 04:05 UTCMay 17, 04:20 UTC15m

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

Mode-S 781B48 frequently asked

What is Mode-S code 781B48?
781B48 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-MBT.
Where is Mode-S 781B48 registered?
Mode-S code 781B48 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B48 broadcasting right now?
No active broadcast right now. Last signal was 51m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B48, octal 36015510, decimal 7,871,304.
What flights does 781B48 operate?
Mode-S 781B48 has broadcast 20 distinct callsigns, including AMU861, AMU657, AMU862, AMU658, AMU936.