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
Broadcasting now · callsign CCA632 · 39,000 ft
Flights observed
185
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 20:15 UTC

Current position

781CAA is currently broadcasting. Map zoomed to live position.

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 - 13 2026-07-22
CCA935 Air China 13 2026-07-24
CCA445 Air China 11 2026-05-29
CCA839 - 9 2026-07-16
CCA949 - 8 2026-07-21
CCA840 - 8 2026-07-17
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
CCA848 Air China 6 2026-07-24
CCA936 Air China 5 2026-07-25
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA847 PVG → LGW Jul 26, 19:55 UTCJul 26, 20:15 UTC20m
2026-07-26 CCA1883 PEK → PVG Jul 26, 14:50 UTCJul 26, 15:05 UTC15m
2026-07-25 CCA936 FRA → PVG Jul 25, 17:35 UTCJul 26, 02:20 UTC8h 45m
2026-07-24 CCA935 PVG → FRA Jul 24, 19:35 UTCJul 25, 14:25 UTC18h 50m
2026-07-24 CCA935 PVG → FRA Jul 24, 16:35 UTCJul 25, 14:25 UTC21h 50m
2026-07-24 CCA935 PVG → FRA Jul 24, 16:25 UTCJul 25, 14:25 UTC22h 0m
2026-07-24 CCA848 LGW → PVG Jul 24, 12:35 UTCJul 25, 11:40 UTC23h 5m
2026-07-24 CCA848 LGW → PVG Jul 24, 10:50 UTCJul 25, 08:40 UTC21h 50m
2026-07-23 CCA847 PVG → LGW Jul 23, 19:50 UTCJul 24, 05:40 UTC9h 50m
2026-07-23 CCA1865 PVG → CAN Jul 23, 12:00 UTCJul 23, 12:10 UTC10m
2026-07-23 CCA1421 PEK → CTU Jul 23, 01:00 UTCJul 23, 01:20 UTC20m
2026-07-22 CCA950 - Jul 22, 11:50 UTCJul 22, 14:40 UTC2h 50m
2026-07-21 CCA949 - Jul 21, 18:05 UTCJul 22, 04:00 UTC9h 55m
2026-07-20 CCA936 - Jul 20, 17:35 UTCJul 21, 02:25 UTC8h 50m
2026-07-19 CCA935 PVG → FRA Jul 19, 16:35 UTCJul 20, 14:10 UTC21h 35m
2026-07-19 CCA935 PVG → FRA Jul 19, 16:20 UTCJul 20, 14:10 UTC21h 50m
2026-07-19 CCA848 - Jul 19, 12:35 UTCJul 20, 11:30 UTC22h 55m
2026-07-19 CCA848 - Jul 19, 10:35 UTCJul 20, 10:30 UTC23h 55m
2026-07-19 CCA847 - Jul 19, 05:45 UTCJul 19, 06:15 UTC30m
2026-07-18 CCA930 NRT → PVG Jul 18, 06:35 UTCJul 18, 20:30 UTC13h 55m
2026-07-17 CCA840 BCN → NRT Jul 17, 12:04 UTCJul 18, 04:50 UTC16h 46m
2026-07-16 CCA839 - Jul 16, 12:49 UTCJul 17, 05:35 UTC16h 45m
2026-07-16 CCA839 - Jul 16, 09:45 UTCJul 17, 05:35 UTC19h 50m
2026-07-15 CCA825 - Jul 15, 12:35 UTCJul 16, 08:00 UTC19h 25m
2026-07-15 CCA828 - Jul 15, 10:45 UTCJul 16, 08:00 UTC21h 15m
2026-07-14 CCA827 - Jul 14, 19:50 UTCJul 15, 05:20 UTC9h 29m
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

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?
Yes. Mode-S 781CAA is currently airborne.
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, CCA935, CCA445, CCA839, CCA949.