Apparatus

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sensors Mode-S transponder

781D50

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-328Q · AIRBUS A-350-900

Hex
781D50
Octal
36016520
Decimal
7,871,824
Country
CN
Tail
B-328Q
Type
A359
Broadcasting now · callsign CCA839 · 38,000 ft
Flights observed
222
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 19:15 UTC

Current position

781D50 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 781D50 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
CCA968 Air China 14 2026-05-29
CCA967 Air China 11 2026-07-23
CCA862 - 11 2026-07-13
CCA861 - 11 2026-07-12
CCA852 Air China 11 2026-07-01
CCA935 - 10 2026-07-11
CCA851 Air China 10 2026-06-30
CCA842 Air China 8 2026-06-29
CCA841 Air China 8 2026-06-29
CCA936 - 7 2026-07-11
CCA911 - 7 2026-07-16
CCA848 - 7 2026-07-06
CCA839 - 7 2026-07-09
CCA950 Air China 6 2026-07-24
CCA840 - 6 2026-07-10
CCA912 - 5 2026-07-17
CCA845 - 5 2026-07-17
CCA827 Air China 5 2026-07-25
CCA1421 Air China 5 2026-07-25
CCA1313 - 5 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA828 MUC → PVG Jul 26, 10:35 UTCJul 26, 19:15 UTC8h 40m
2026-07-25 CCA827 PVG → MUC Jul 25, 19:50 UTCJul 25, 20:10 UTC20m
2026-07-25 CCA1421 PEK → CTU Jul 25, 00:55 UTCJul 25, 20:10 UTC19h 15m
2026-07-24 CCA950 MXP → PEK Jul 24, 21:05 UTCJul 24, 21:25 UTC20m
2026-07-24 CCA950 MXP → PEK Jul 24, 12:10 UTCJul 24, 18:40 UTC6h 30m
2026-07-23 CCA967 PVG → MXP Jul 23, 22:25 UTCJul 24, 05:00 UTC6h 35m
2026-07-23 CCA967 PVG → MXP Jul 23, 06:50 UTCJul 24, 05:00 UTC22h 10m
2026-07-22 CCA828 MUC → PVG Jul 22, 11:40 UTCJul 23, 05:25 UTC17h 45m
2026-07-22 CCA827 PVG → MUC Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 CCA827 PVG → MUC Jul 22, 00:20 UTCJul 22, 04:00 UTC3h 40m
2026-07-21 CCA1421 PEK → CTU Jul 21, 00:45 UTCJul 21, 01:10 UTC25m
2026-07-20 CCA1436 CKG → PEK Jul 20, 18:10 UTCJul 20, 18:20 UTC10m
2026-07-20 CCA1435 PEK → CKG Jul 20, 12:50 UTCJul 20, 13:15 UTC25m
2026-07-20 CCA1476 - Jul 20, 00:10 UTCJul 20, 07:50 UTC7h 40m
2026-07-19 CCA1509 PEK → SHA Jul 19, 12:35 UTCJul 19, 12:45 UTC10m
2026-07-19 CCA1422 - Jul 19, 07:05 UTCJul 19, 07:15 UTC10m
2026-07-19 CCA1421 PEK → CTU Jul 19, 00:55 UTCJul 19, 01:15 UTC20m
2026-07-18 CCA846 - Jul 18, 10:55 UTCJul 18, 20:40 UTC9h 45m
2026-07-17 CCA845 - Jul 17, 22:35 UTCJul 18, 06:20 UTC7h 46m
2026-07-17 CCA845 - Jul 17, 19:25 UTCJul 17, 19:40 UTC15m
2026-07-17 CCA1391 - Jul 17, 06:25 UTCJul 17, 06:40 UTC15m
2026-07-17 CCA912 - Jul 17, 00:30 UTCJul 17, 00:50 UTC20m
2026-07-16 CCA912 - Jul 16, 17:14 UTCJul 16, 22:05 UTC4h 50m
2026-07-16 CCA911 - Jul 16, 09:40 UTCJul 16, 14:50 UTC5h 10m
2026-07-16 CCA911 - Jul 16, 06:25 UTCJul 16, 06:40 UTC15m
2026-07-16 CCA868 - Jul 16, 00:30 UTCJul 16, 00:40 UTC10m
2026-07-15 CCA868 - Jul 15, 20:55 UTCJul 15, 21:10 UTC15m
2026-07-15 CCA868 - Jul 15, 08:25 UTCJul 15, 19:05 UTC10h 40m
2026-07-14 CCA867 - Jul 14, 18:45 UTCJul 15, 05:10 UTC10h 24m
2026-07-14 CCA867 - Jul 14, 16:50 UTCJul 14, 17:05 UTC15m
2026-07-14 CCA867 - Jul 14, 10:55 UTCJul 14, 11:15 UTC20m
2026-07-14 CCA1368 - Jul 14, 06:15 UTCJul 14, 06:30 UTC15m
2026-07-14 CCA1367 - Jul 14, 04:05 UTCJul 14, 04:35 UTC30m
2026-07-14 CCA1367 - Jul 14, 01:50 UTCJul 14, 02:10 UTC20m
2026-07-13 CCA862 - Jul 13, 20:20 UTCJul 13, 20:40 UTC20m
2026-07-13 CCA862 - Jul 13, 11:30 UTCJul 13, 18:00 UTC6h 30m
2026-07-12 CCA861 - Jul 12, 22:20 UTCJul 13, 05:15 UTC6h 55m
2026-07-12 CCA861 - Jul 12, 19:15 UTCJul 12, 19:25 UTC10m
2026-07-11 CCA936 - Jul 11, 17:45 UTCJul 12, 02:50 UTC9h 5m
2026-07-11 CCA935 - Jul 11, 13:40 UTCJul 11, 14:10 UTC30m
2026-07-10 CCA840 - Jul 10, 14:05 UTCJul 11, 08:30 UTC18h 26m
2026-07-10 CCA840 - Jul 10, 12:05 UTCJul 11, 08:30 UTC20h 25m
2026-07-10 CCA840 - Jul 10, 11:25 UTCJul 11, 08:30 UTC21h 5m
2026-07-09 CCA839 - Jul 9, 22:00 UTCJul 10, 05:45 UTC7h 45m
2026-07-09 CCA839 - Jul 9, 08:05 UTCJul 10, 05:45 UTC21h 40m
2026-07-09 CCA839 - Jul 9, 07:45 UTCJul 10, 05:45 UTC22h 0m
2026-07-08 CCA840 BCN → NRT Jul 8, 11:35 UTCJul 9, 05:55 UTC18h 20m
2026-07-07 CCA839 - Jul 7, 10:05 UTCJul 8, 05:35 UTC19h 30m
2026-07-07 CCA839 - Jul 7, 09:35 UTCJul 8, 05:35 UTC20h 0m
2026-07-06 CCA848 - Jul 6, 12:05 UTCJul 7, 07:55 UTC19h 50m

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-328Q page for operator, model, and routing details .

Mode-S 781D50 frequently asked

What is Mode-S code 781D50?
781D50 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-328Q.
Where is Mode-S 781D50 registered?
Mode-S code 781D50 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781D50 broadcasting right now?
Yes. Mode-S 781D50 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781D50, octal 36016520, decimal 7,871,824.
What flights does 781D50 operate?
Mode-S 781D50 has broadcast 20 distinct callsigns, including CCA968, CCA967, CCA862, CCA861, CCA852.