Apparatus

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sensors Mode-S transponder

781641

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-307A · AIRBUS A-350-900

Hex
781641
Octal
36013101
Decimal
7,870,017
Country
CN
Tail
B-307A
Type
A359
No current signal · last broadcast Jul 26, 21:40 UTC
Flights observed
202
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 21:40 UTC

Last known position

Most recent position reported by Mode-S 781641.

Country allocation

The ICAO 24-bit address 781641 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
CCA848 - 12 2026-06-30
CCA847 Air China 11 2026-06-29
CCA967 Air China 9 2026-07-25
CCA950 Air China 9 2026-07-26
CCA935 - 9 2026-07-03
CCA867 Air China 8 2026-07-09
CCA852 Air China 8 2026-06-23
CCA851 Air China 8 2026-06-22
CCA846 Air China 8 2026-07-21
CCA936 Air China 7 2026-07-03
CCA878 Air China 7 2026-05-30
CCA845 - 7 2026-07-20
CCA877 Air China 6 2026-05-30
CCA862 Air China 6 2026-05-22
CCA968 Air China 5 2026-07-02
CCA841 Air China 5 2026-06-24
CCA868 - 4 2026-07-11
CCA570 Air China 4 2026-07-23
CCA1883 Air China 4 2026-07-25
CCA1397 Air China 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA950 MXP → PEK Jul 26, 12:35 UTCJul 26, 21:40 UTC9h 5m
2026-07-25 CCA967 PVG → MXP Jul 25, 22:35 UTCJul 25, 23:15 UTC40m
2026-07-25 CCA1883 PEK → PVG Jul 25, 12:55 UTCJul 25, 13:05 UTC10m
2026-07-25 CCA1376 SZX → PEK Jul 25, 09:30 UTCJul 25, 09:45 UTC15m
2026-07-25 CCA1375 PEK → SZX Jul 25, 03:25 UTCJul 25, 03:40 UTC15m
2026-07-25 CCA1375 PEK → SZX Jul 25, 00:45 UTCJul 25, 01:30 UTC45m
2026-07-24 CCA1398 SZX → PEK Jul 24, 13:40 UTCJul 24, 14:10 UTC30m
2026-07-24 CCA1398 SZX → PEK Jul 24, 11:50 UTCJul 24, 12:05 UTC15m
2026-07-24 CCA1397 PEK → SZX Jul 24, 09:40 UTCJul 24, 10:05 UTC25m
2026-07-24 CCA1397 PEK → SZX Jul 24, 07:20 UTCJul 24, 08:00 UTC40m
2026-07-24 CCA632 LGW → PEK Jul 24, 04:30 UTCJul 24, 04:50 UTC20m
2026-07-23 CCA632 LGW → PEK Jul 23, 19:30 UTCJul 24, 02:00 UTC6h 30m
2026-07-23 CCA631 PEK → LGW Jul 23, 06:45 UTCJul 23, 16:30 UTC9h 45m
2026-07-23 CCA570 ARN → PEK Jul 23, 03:55 UTCJul 23, 04:20 UTC25m
2026-07-22 CCA570 ARN → PEK Jul 22, 20:35 UTCJul 23, 01:25 UTC4h 50m
2026-07-22 CCA569 PEK → ARN Jul 22, 12:25 UTCJul 22, 17:40 UTC5h 15m
2026-07-21 CCA1405 PEK → CTU Jul 21, 23:50 UTCJul 22, 00:15 UTC25m
2026-07-21 CCA846 BCN → PEK Jul 21, 20:45 UTCJul 21, 21:00 UTC15m
2026-07-21 CCA846 BCN → PEK Jul 21, 11:15 UTCJul 21, 18:20 UTC7h 5m
2026-07-20 CCA845 - Jul 20, 22:35 UTCJul 21, 06:10 UTC7h 34m
2026-07-20 CCA845 - Jul 20, 19:35 UTCJul 20, 19:45 UTC10m
2026-07-20 CCA1398 - Jul 20, 12:00 UTCJul 20, 12:10 UTC10m
2026-07-20 CCA1397 - Jul 20, 08:55 UTCJul 20, 09:15 UTC20m
2026-07-20 CCA1397 - Jul 20, 06:30 UTCJul 20, 06:50 UTC20m
2026-07-16 CCA1883 - Jul 16, 13:30 UTCJul 16, 13:45 UTC15m
2026-07-16 CCA1557 - Jul 16, 04:00 UTCJul 16, 04:15 UTC15m
2026-07-16 CCA912 - Jul 16, 00:40 UTCJul 16, 01:00 UTC20m
2026-07-15 CCA912 - Jul 15, 17:35 UTCJul 15, 22:20 UTC4h 45m
2026-07-15 CCA911 - Jul 15, 09:45 UTCJul 15, 15:00 UTC5h 15m
2026-07-15 CCA911 - Jul 15, 06:25 UTCJul 15, 06:40 UTC15m
2026-07-15 CCA570 - Jul 15, 03:40 UTCJul 15, 04:00 UTC20m
2026-07-14 CCA570 - Jul 14, 20:25 UTCJul 15, 01:15 UTC4h 49m
2026-07-14 CCA569 - Jul 14, 12:30 UTCJul 14, 17:30 UTC5h 0m
2026-07-14 CCA569 - Jul 14, 09:20 UTCJul 14, 09:30 UTC10m
2026-07-13 CCA1883 - Jul 13, 13:00 UTCJul 13, 13:10 UTC10m
2026-07-13 CCA1446 - Jul 13, 10:20 UTCJul 13, 10:50 UTC30m
2026-07-13 CCA1445 - Jul 13, 02:45 UTCJul 13, 03:05 UTC20m
2026-07-12 CCA950 - Jul 12, 11:55 UTCJul 12, 21:15 UTC9h 20m
2026-07-11 CCA949 - Jul 11, 18:20 UTCJul 12, 04:10 UTC9h 50m
2026-07-11 CCA1342 - Jul 11, 10:05 UTCJul 11, 10:15 UTC10m
2026-07-11 CCA1341 - Jul 11, 07:35 UTCJul 11, 07:50 UTC15m
2026-07-11 CCA1341 - Jul 11, 05:15 UTCJul 11, 05:40 UTC25m
2026-07-11 CCA868 - Jul 11, 00:35 UTCJul 11, 00:45 UTC10m
2026-07-10 CCA868 - Jul 10, 21:05 UTCJul 10, 21:25 UTC20m
2026-07-10 CCA868 - Jul 10, 08:45 UTCJul 10, 19:30 UTC10h 45m
2026-07-09 CCA867 - Jul 9, 19:20 UTCJul 10, 06:00 UTC10h 40m
2026-07-09 CCA867 - Jul 9, 17:45 UTCJul 9, 18:00 UTC15m
2026-07-09 CCA867 - Jul 9, 15:15 UTCJul 9, 15:30 UTC15m
2026-07-09 CCA867 SZX → JNB Jul 9, 12:55 UTCJul 9, 13:10 UTC15m
2026-07-09 CCA1330 - Jul 9, 05:35 UTCJul 9, 05:50 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-307A page for operator, model, and routing details .

Mode-S 781641 frequently asked

What is Mode-S code 781641?
781641 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-307A.
Where is Mode-S 781641 registered?
Mode-S code 781641 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781641 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781641, octal 36013101, decimal 7,870,017.
What flights does 781641 operate?
Mode-S 781641 has broadcast 20 distinct callsigns, including CCA848, CCA847, CCA967, CCA950, CCA935.