Apparatus

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sensors Mode-S transponder

781649

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-MCK · AIRBUS A-320neo

Hex
781649
Octal
36013111
Decimal
7,870,025
Country
CN
Tail
B-MCK
Type
A20N
No current signal · last broadcast 3d ago
Flights observed
247
Distinct callsigns
20
Country
CN
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 781649.

Country allocation

The ICAO 24-bit address 781649 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 33 2026-07-25
AMU862 Air Macao 27 2026-07-25
AMU855 - 26 2026-07-21
AMU908 Air Macao 20 2026-07-26
AMU856 Air Macao 19 2026-07-21
AMU907 Air Macao 15 2026-07-26
AMU986 Air Macao 8 2026-07-22
AMU935 - 7 2026-07-07
AMU821 - 6 2026-07-14
AMU106 - 5 2026-07-14
AMU992 - 4 2026-07-16
AMU936 - 4 2026-07-07
AMU822 - 4 2026-07-14
AMU388 - 4 2026-06-30
AMU132 - 4 2026-07-21
AMU131 - 4 2026-07-21
AMU991 Air Macao 3 2026-07-16
AMU622 - 3 2026-07-18
AMU372 - 3 2026-06-28
AMU182 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AMU907 SIN → MFM Jul 26, 17:20 UTCJul 26, 17:40 UTC20m
2026-07-26 AMU908 MFM → SIN Jul 26, 15:05 UTCJul 26, 15:35 UTC30m
2026-07-26 AMU908 MFM → SIN Jul 26, 12:15 UTCJul 26, 12:25 UTC10m
2026-07-25 AMU861 NRT → MFM Jul 25, 07:25 UTCJul 25, 09:05 UTC1h 40m
2026-07-25 AMU862 MFM → NRT Jul 25, 04:10 UTCJul 25, 05:55 UTC1h 45m
2026-07-25 AMU862 MFM → NRT Jul 25, 01:55 UTCJul 25, 02:05 UTC10m
2026-07-24 AMU861 NRT → MFM Jul 24, 07:25 UTCJul 24, 11:15 UTC3h 50m
2026-07-24 AMU862 MFM → NRT Jul 24, 01:45 UTCJul 24, 05:45 UTC4h 0m
2026-07-23 AMU907 SIN → MFM Jul 23, 09:20 UTCJul 23, 09:50 UTC30m
2026-07-23 AMU908 MFM → SIN Jul 23, 04:20 UTCJul 23, 08:00 UTC3h 40m
2026-07-22 AMU986 MFM → DAD Jul 22, 13:40 UTCJul 22, 13:50 UTC10m
2026-07-22 AMU861 NRT → MFM Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 AMU862 MFM → NRT Jul 22, 01:45 UTCJul 22, 05:25 UTC3h 40m
2026-07-21 AMU131 - Jul 21, 13:25 UTCJul 21, 14:05 UTC40m
2026-07-21 AMU132 - Jul 21, 10:35 UTCJul 21, 10:50 UTC15m
2026-07-21 AMU855 - Jul 21, 05:50 UTCJul 21, 09:00 UTC3h 10m
2026-07-21 AMU856 MFM → KIX Jul 21, 00:45 UTCJul 21, 03:55 UTC3h 10m
2026-07-20 AMU907 SIN → MFM Jul 20, 09:50 UTCJul 20, 10:10 UTC20m
2026-07-20 AMU908 - Jul 20, 08:05 UTCJul 20, 08:30 UTC25m
2026-07-20 AMU908 - Jul 20, 05:05 UTCJul 20, 05:20 UTC15m
2026-07-19 AMU131 - Jul 19, 13:20 UTCJul 19, 13:55 UTC35m
2026-07-19 AMU132 - Jul 19, 10:40 UTCJul 19, 10:55 UTC15m
2026-07-19 AMU951 - Jul 19, 07:15 UTCJul 19, 07:50 UTC35m
2026-07-19 AMU952 - Jul 19, 03:40 UTCJul 19, 05:20 UTC1h 40m
2026-07-18 AMU621 - Jul 18, 14:50 UTCJul 18, 15:55 UTC1h 5m
2026-07-18 AMU622 - Jul 18, 12:20 UTCJul 18, 13:45 UTC1h 25m
2026-07-18 AMU128 - Jul 18, 05:05 UTCJul 18, 10:10 UTC5h 5m
2026-07-17 AMU386 MFM → TFU Jul 17, 15:15 UTCJul 17, 15:29 UTC15m
2026-07-17 AMU907 - Jul 17, 09:45 UTCJul 17, 10:15 UTC30m
2026-07-17 AMU908 - Jul 17, 07:40 UTCJul 17, 08:20 UTC40m
2026-07-17 AMU908 - Jul 17, 04:39 UTCJul 17, 04:54 UTC15m
2026-07-16 AMU991 BKK → MFM Jul 16, 15:45 UTCJul 16, 15:55 UTC10m
2026-07-16 AMU992 - Jul 16, 13:54 UTCJul 16, 14:15 UTC20m
2026-07-16 AMU992 - Jul 16, 11:45 UTCJul 16, 11:54 UTC10m
2026-07-16 AMU855 - Jul 16, 05:25 UTCJul 16, 08:30 UTC3h 5m
2026-07-16 AMU856 - Jul 16, 00:40 UTCJul 16, 04:00 UTC3h 20m
2026-07-15 AMU615 - Jul 15, 13:20 UTCJul 15, 14:40 UTC1h 20m
2026-07-15 AMU616 - Jul 15, 10:45 UTCJul 15, 12:15 UTC1h 30m
2026-07-15 AMU855 - Jul 15, 05:20 UTCJul 15, 08:30 UTC3h 10m
2026-07-15 AMU856 - Jul 15, 00:40 UTCJul 15, 03:55 UTC3h 15m
2026-07-14 AMU106 - Jul 14, 11:25 UTCJul 14, 16:35 UTC5h 10m
2026-07-14 AMU821 - Jul 14, 05:35 UTCJul 14, 08:35 UTC3h 0m
2026-07-14 AMU822 - Jul 14, 00:40 UTCJul 14, 03:50 UTC3h 10m
2026-07-13 AMU227 - Jul 13, 15:35 UTCJul 13, 16:10 UTC35m
2026-07-13 AMU226 - Jul 13, 10:55 UTCJul 13, 12:20 UTC1h 25m
2026-07-13 AMU855 - Jul 13, 05:45 UTCJul 13, 08:55 UTC3h 10m
2026-07-13 AMU856 - Jul 13, 00:35 UTCJul 13, 04:05 UTC3h 30m
2026-07-12 AMU949 - Jul 12, 17:25 UTCJul 12, 17:35 UTC10m
2026-07-12 AMU861 - Jul 12, 07:20 UTCJul 12, 11:15 UTC3h 55m
2026-07-12 AMU862 - Jul 12, 01:40 UTCJul 12, 05:45 UTC4h 5m

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

Mode-S 781649 frequently asked

What is Mode-S code 781649?
781649 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-MCK.
Where is Mode-S 781649 registered?
Mode-S code 781649 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781649 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781649, octal 36013111, decimal 7,870,025.
What flights does 781649 operate?
Mode-S 781649 has broadcast 20 distinct callsigns, including AMU861, AMU862, AMU855, AMU908, AMU856.