Apparatus

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sensors Mode-S transponder

781CAA

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-326Y · AIRBUS A-350-900

Hex
781CAA
Octal
36016252
Decimal
7,871,658
Country
CN
Tail
B-326Y
Type
A359
No current signal · last broadcast 10h ago
Flights observed
159
Distinct callsigns
20
Country
CN
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 781CAA.

Country allocation

The ICAO 24-bit address 781CAA 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
CCA950 Air China 12 2026-06-07
CCA445 Air China 11 2026-05-29
CCA935 - 8 2026-06-14
CCA949 Air China 7 2026-06-08
CCA840 Air China 7 2026-06-13
CCA839 - 7 2026-06-12
CCA446 Air China 7 2026-05-27
CCA424 Air China 7 2026-05-29
CCA852 - 6 2026-07-08
CCA851 Air China 6 2026-07-08
CCA846 - 5 2026-07-13
CCA423 Air China 5 2026-05-28
CCA912 Air China 4 2026-05-01
CCA867 Air China 4 2026-04-19
CCA862 - 4 2026-07-07
CCA845 - 4 2026-07-12
CCA842 Air China 4 2026-06-03
CCA968 Air China 3 2026-06-09
CCA967 Air China 3 2026-06-06
CCA936 Air China 3 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CCA1421 - Jul 14, 01:00 UTCJul 14, 01:25 UTC25m
2026-07-13 CCA846 - Jul 13, 20:15 UTCJul 13, 20:30 UTC15m
2026-07-13 CCA846 - Jul 13, 10:50 UTCJul 13, 18:00 UTC7h 10m
2026-07-12 CCA845 - Jul 12, 22:30 UTCJul 13, 06:15 UTC7h 45m
2026-07-12 CCA845 - Jul 12, 19:20 UTCJul 12, 19:30 UTC10m
2026-07-12 CCA1391 - Jul 12, 06:20 UTCJul 12, 06:35 UTC15m
2026-07-08 CCA852 - Jul 8, 12:15 UTCJul 8, 21:25 UTC9h 10m
2026-07-08 CCA851 PEK → NCE Jul 8, 02:00 UTCJul 8, 08:50 UTC6h 50m
2026-07-07 CCA862 - Jul 7, 20:25 UTCJul 7, 20:40 UTC15m
2026-07-07 CCA862 - Jul 7, 11:35 UTCJul 7, 14:20 UTC2h 45m
2026-07-06 CCA861 - Jul 6, 22:25 UTCJul 7, 05:20 UTC6h 55m
2026-07-06 CCA1509 - Jul 6, 10:30 UTCJul 6, 10:40 UTC10m
2026-07-06 CCA1351 - Jul 6, 01:15 UTCJul 6, 01:35 UTC20m
2026-07-05 CCA1521 - Jul 5, 06:50 UTCJul 5, 07:00 UTC10m
2026-06-21 CCA1523 - Jun 21, 02:55 UTCJun 21, 03:05 UTC10m
2026-06-18 CCA1866 - Jun 18, 16:40 UTCJun 18, 16:55 UTC15m
2026-06-16 CCA846 - Jun 16, 10:55 UTCJun 16, 18:15 UTC7h 20m
2026-06-15 CCA845 PEK → BCN Jun 15, 22:35 UTCJun 16, 05:55 UTC7h 20m
2026-06-14 CCA936 FRA → PVG Jun 14, 17:40 UTCJun 14, 23:44 UTC6h 5m
2026-06-14 CCA935 - Jun 14, 13:20 UTCJun 14, 14:15 UTC55m
2026-06-13 CCA935 - Jun 13, 17:15 UTCJun 14, 14:15 UTC21h 0m
2026-06-13 CCA840 BCN → PVG Jun 13, 14:35 UTCJun 14, 14:15 UTC23h 40m
2026-06-13 CCA840 BCN → PVG Jun 13, 10:25 UTCJun 13, 18:00 UTC7h 35m
2026-06-12 CCA839 - Jun 12, 12:50 UTCJun 13, 05:25 UTC16h 34m
2026-06-12 CCA839 - Jun 12, 10:05 UTCJun 13, 05:25 UTC19h 19m
2026-06-11 CCA840 BCN → PVG Jun 11, 12:35 UTCJun 12, 07:30 UTC18h 55m
2026-06-11 CCA840 BCN → PVG Jun 11, 11:15 UTCJun 12, 07:30 UTC20h 16m
2026-06-10 CCA839 PVG → BCN Jun 10, 12:45 UTCJun 11, 05:30 UTC16h 45m
2026-06-10 CCA839 PVG → BCN Jun 10, 09:45 UTCJun 11, 05:30 UTC19h 45m
2026-06-09 CCA968 MXP → PVG Jun 9, 12:35 UTCJun 10, 07:55 UTC19h 20m
2026-06-09 CCA968 MXP → PVG Jun 9, 10:55 UTCJun 10, 07:55 UTC21h 0m
2026-06-08 CCA949 PEK → MXP Jun 8, 19:40 UTCJun 9, 05:55 UTC10h 15m
2026-06-08 CCA1318 CAN → TSN Jun 8, 11:05 UTCJun 8, 12:00 UTC55m
2026-06-08 CCA1317 TSN → CAN Jun 8, 02:20 UTCJun 8, 08:40 UTC6h 20m
2026-06-07 CCA950 MXP → PEK Jun 7, 20:35 UTCJun 7, 20:55 UTC20m
2026-06-07 CCA950 MXP → PEK Jun 7, 11:40 UTCJun 7, 18:10 UTC6h 30m
2026-06-06 CCA967 PVG → MXP Jun 6, 22:30 UTCJun 7, 05:10 UTC6h 40m
2026-06-06 CCA1421 PEK → CTU Jun 6, 00:55 UTCJun 6, 01:15 UTC20m
2026-06-05 CCA862 GVA → PEK Jun 5, 20:30 UTCJun 5, 20:45 UTC15m
2026-06-05 CCA862 GVA → PEK Jun 5, 11:35 UTCJun 5, 18:05 UTC6h 30m
2026-06-04 CCA861 PEK → GVA Jun 4, 22:15 UTCJun 5, 05:15 UTC7h 0m
2026-06-04 CCA861 PEK → GVA Jun 4, 19:10 UTCJun 4, 19:20 UTC10m
2026-06-04 CCA1407 PEK → CTU Jun 4, 10:15 UTCJun 4, 10:35 UTC20m
2026-06-04 CCA1422 CTU → PEK Jun 4, 00:55 UTCJun 4, 07:10 UTC6h 15m
2026-06-03 CCA842 VIE → PEK Jun 3, 19:50 UTCJun 3, 20:05 UTC15m
2026-06-03 CCA842 VIE → PEK Jun 3, 11:50 UTCJun 3, 17:30 UTC5h 40m
2026-06-02 CCA841 PEK → VIE Jun 2, 19:15 UTCJun 3, 04:25 UTC9h 10m
2026-06-01 CCA840 BCN → PVG Jun 1, 11:00 UTCJun 1, 14:45 UTC3h 45m
2026-05-31 CCA839 PVG → BCN May 31, 22:25 UTCJun 1, 06:05 UTC7h 40m
2026-05-30 CCA950 MXP → PEK May 30, 22:00 UTCMay 30, 22:20 UTC20m

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-326Y page for operator, model, and routing details .

Mode-S 781CAA frequently asked

What is Mode-S code 781CAA?
781CAA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-326Y.
Where is Mode-S 781CAA registered?
Mode-S code 781CAA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781CAA broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781CAA, octal 36016252, decimal 7,871,658.
What flights does 781CAA operate?
Mode-S 781CAA has broadcast 20 distinct callsigns, including CCA950, CCA445, CCA935, CCA949, CCA840.