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
Broadcasting now · callsign CCA877 · 36,000 ft
Flights observed
87
Distinct callsigns
20
Country
CN
Last broadcast
3h ago

Current position

781641 is currently broadcasting. Map zoomed to live position.

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 Air China 8 2026-05-19
CCA847 Air China 7 2026-05-18
CCA878 Air China 6 2026-05-29
CCA862 Air China 6 2026-05-22
CCA950 Air China 5 2026-05-26
CCA877 Air China 5 2026-05-30
CCA936 Air China 4 2026-04-15
CCA867 Air China 4 2026-04-23
CCA846 Air China 4 2026-05-15
CCA845 Air China 4 2026-05-14
CCA967 Air China 3 2026-05-25
CCA935 Air China 3 2026-04-15
CCA861 Air China 3 2026-05-22
CCA852 Air China 3 2026-05-24
CCA1422 Air China 3 2026-05-20
CCA851 Air China 2 2026-05-23
CCA1314 Air China 2 2026-05-10
CCA1313 Air China 2 2026-05-10
CCA1305 Air China 2 2026-04-18
CCA968 Air China 1 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CCA877 PEK → CPH May 30, 05:45 UTCMay 30, 05:55 UTC10m
2026-05-29 CCA912 ARN → PEK May 29, 17:25 UTCMay 29, 22:20 UTC4h 55m
2026-05-29 CCA911 PEK → ARN May 29, 06:30 UTCMay 29, 14:45 UTC8h 15m
2026-05-29 CCA878 CPH → PEK May 29, 01:10 UTCMay 29, 01:30 UTC20m
2026-05-28 CCA878 CPH → PEK May 28, 17:15 UTCMay 28, 22:45 UTC5h 30m
2026-05-28 CCA877 PEK → CPH May 28, 09:10 UTCMay 28, 14:30 UTC5h 20m
2026-05-28 CCA878 CPH → PEK May 28, 02:00 UTCMay 28, 02:20 UTC20m
2026-05-27 CCA878 CPH → PEK May 27, 18:20 UTCMay 27, 23:40 UTC5h 20m
2026-05-27 CCA877 PEK → CPH May 27, 10:30 UTCMay 27, 16:05 UTC5h 35m
2026-05-27 CCA877 PEK → CPH May 27, 07:20 UTCMay 27, 07:30 UTC10m
2026-05-26 CCA950 MXP → PEK May 26, 20:40 UTCMay 26, 20:54 UTC15m
2026-05-26 CCA950 MXP → PEK May 26, 11:44 UTCMay 26, 18:10 UTC6h 25m
2026-05-25 CCA967 PVG → MXP May 25, 23:49 UTCMay 26, 06:49 UTC7h 0m
2026-05-24 CCA852 NCE → PEK May 24, 12:05 UTCMay 24, 14:45 UTC2h 40m
2026-05-23 CCA851 PEK → NCE May 23, 22:25 UTCMay 24, 05:30 UTC7h 5m
2026-05-22 CCA862 GVA → PEK May 22, 11:40 UTCMay 22, 18:05 UTC6h 25m
2026-05-22 CCA861 PEK → GVA May 22, 02:35 UTCMay 22, 09:40 UTC7h 5m
2026-05-21 CCA862 GVA → PEK May 21, 20:35 UTCMay 21, 21:00 UTC25m
2026-05-21 CCA862 GVA → PEK May 21, 11:35 UTCMay 21, 18:05 UTC6h 30m
2026-05-20 CCA861 PEK → GVA May 20, 19:25 UTCMay 21, 05:25 UTC10h 0m
2026-05-20 CCA1422 CTU → PEK May 20, 07:30 UTCMay 20, 07:40 UTC10m
2026-05-19 CCA848 LGW → PVG May 19, 10:35 UTCMay 19, 20:05 UTC9h 30m
2026-05-18 CCA847 PVG → LGW May 18, 19:50 UTCMay 19, 06:00 UTC10h 10m
2026-05-18 CCA847 PVG → LGW May 18, 00:50 UTCMay 18, 23:25 UTC22h 34m
2026-05-17 CCA862 GVA → PEK May 17, 20:25 UTCMay 17, 20:45 UTC20m
2026-05-17 CCA862 GVA → PEK May 17, 11:30 UTCMay 17, 17:55 UTC6h 25m
2026-05-16 CCA861 PEK → GVA May 16, 22:15 UTCMay 17, 05:15 UTC7h 0m
2026-05-15 CCA846 BCN → PEK May 15, 11:20 UTCMay 15, 18:25 UTC7h 4m
2026-05-14 CCA845 PEK → BCN May 14, 22:05 UTCMay 15, 05:55 UTC7h 50m
2026-05-13 CCA968 MXP → PVG May 13, 10:40 UTCMay 13, 17:05 UTC6h 25m
2026-05-12 CCA967 PVG → MXP May 12, 23:01 UTCMay 13, 06:05 UTC7h 5m
2026-05-11 CCA846 BCN → PEK May 11, 11:20 UTCMay 11, 18:30 UTC7h 11m
2026-05-10 CCA845 PEK → BCN May 10, 21:00 UTCMay 11, 06:15 UTC9h 15m
2026-05-10 CCA1314 SZX → PEK May 10, 10:00 UTCMay 10, 10:10 UTC10m
2026-05-10 CCA1313 PEK → SZX May 10, 05:45 UTCMay 10, 06:10 UTC25m
2026-05-09 CCA846 BCN → PEK May 9, 20:00 UTCMay 9, 20:15 UTC15m
2026-05-09 CCA846 BCN → PEK May 9, 10:45 UTCMay 9, 14:20 UTC3h 35m
2026-05-09 CCA845 PEK → BCN May 9, 05:00 UTCMay 9, 06:35 UTC1h 35m
2026-05-08 CCA845 PEK → BCN May 8, 19:15 UTCMay 8, 19:25 UTC10m
2026-05-03 CCA1521 PEK → SHA May 3, 06:55 UTCMay 3, 07:05 UTC10m
2026-05-02 CCA1563 PEK → SHA May 2, 11:55 UTCMay 2, 12:05 UTC10m
2026-05-01 CCA852 NCE → PEK May 1, 20:55 UTCMay 1, 21:10 UTC15m
2026-05-01 CCA852 NCE → PEK May 1, 11:55 UTCMay 1, 18:30 UTC6h 35m
2026-04-30 CCA851 PEK → NCE Apr 30, 19:10 UTCMay 1, 05:35 UTC10h 25m
2026-04-30 CCA1408 CTU → PEK Apr 30, 15:55 UTCApr 30, 16:10 UTC15m
2026-04-30 CCA1407 PEK → CTU Apr 30, 10:05 UTCApr 30, 10:20 UTC15m
2026-04-30 CCA1422 CTU → PEK Apr 30, 07:40 UTCApr 30, 07:50 UTC10m
2026-04-29 CCA848 LGW → PVG Apr 29, 10:30 UTCApr 29, 19:55 UTC9h 25m
2026-04-28 CCA847 PVG → LGW Apr 28, 12:35 UTCApr 29, 05:15 UTC16h 40m
2026-04-28 CCA847 PVG → LGW Apr 28, 09:50 UTCApr 29, 05:15 UTC19h 25m

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?
Yes. Mode-S 781641 is currently airborne.
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, CCA878, CCA862, CCA950.