Apparatus

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sensors Mode-S transponder

781328

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1221 · BOEING 737-800

Hex
781328
Octal
36011450
Decimal
7,869,224
Country
CN
Tail
B-1221
Type
B738
No current signal · last broadcast 1d ago
Flights observed
52
Distinct callsigns
11
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781328.

Country allocation

The ICAO 24-bit address 781328 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 11 distinct

Callsign Airline Flights Last seen
CCA440 Air China 12 2026-05-26
CCA4346 Air China 8 2026-05-29
CCA439 Air China 7 2026-05-26
CCA490 Air China 6 2026-05-01
CCA489 Air China 6 2026-05-01
CCA4015 Air China 3 2026-05-06
CCA4014 Air China 3 2026-05-21
CCA482 Air China 2 2026-05-25
CCA481 Air China 2 2026-05-25
CCA4345 - 1 2026-04-18
CCA4013 Air China 1 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CCA4346 SZX → CKG May 29, 16:20 UTCMay 29, 16:35 UTC15m
2026-05-27 CCA4346 SZX → CKG May 27, 12:55 UTCMay 27, 13:05 UTC10m
2026-05-26 CCA440 ICN → CKG May 26, 05:30 UTCMay 26, 05:45 UTC15m
2026-05-26 CCA439 CKG → ICN May 26, 03:30 UTCMay 26, 03:45 UTC15m
2026-05-25 CCA482 MNL → CKG May 25, 18:05 UTCMay 26, 02:35 UTC8h 29m
2026-05-25 CCA481 CKG → MNL May 25, 14:25 UTCMay 25, 16:15 UTC1h 50m
2026-05-22 CCA440 ICN → CKG May 22, 05:40 UTCMay 22, 06:00 UTC20m
2026-05-22 CCA439 CKG → ICN May 22, 03:20 UTCMay 22, 03:40 UTC20m
2026-05-21 CCA4014 YCU → CKG May 21, 06:20 UTCMay 21, 06:30 UTC10m
2026-05-20 CCA440 ICN → CKG May 20, 05:45 UTCMay 20, 06:05 UTC20m
2026-05-20 CCA439 CKG → ICN May 20, 03:25 UTCMay 20, 03:45 UTC20m
2026-05-19 CCA440 ICN → CKG May 19, 05:35 UTCMay 20, 02:25 UTC20h 50m
2026-05-19 CCA439 CKG → ICN May 19, 03:25 UTCMay 19, 03:45 UTC20m
2026-05-18 CCA482 MNL → CKG May 18, 18:10 UTCMay 19, 02:35 UTC8h 24m
2026-05-18 CCA481 CKG → MNL May 18, 14:25 UTCMay 18, 16:10 UTC1h 45m
2026-05-16 CCA440 ICN → CKG May 16, 05:25 UTCMay 16, 05:40 UTC15m
2026-05-16 CCA439 CKG → ICN May 16, 03:40 UTCMay 16, 04:00 UTC20m
2026-05-11 CCA440 ICN → CKG May 11, 05:20 UTCMay 11, 05:35 UTC15m
2026-05-11 - - May 11, 03:30 UTCMay 11, 03:40 UTC10m
2026-05-10 CCA440 ICN → CKG May 10, 05:20 UTCMay 10, 05:34 UTC15m
2026-05-06 CCA4015 CKG → CGQ May 6, 01:40 UTCMay 6, 01:55 UTC15m
2026-05-05 CCA4014 YCU → CKG May 5, 06:25 UTCMay 5, 06:35 UTC10m
2026-05-05 CCA4013 YCU → SHE May 5, 02:20 UTCMay 5, 02:30 UTC10m
2026-05-03 CCA440 ICN → CKG May 3, 05:25 UTCMay 3, 05:40 UTC15m
2026-05-02 CCA4346 SZX → CKG May 2, 14:50 UTCMay 2, 15:05 UTC15m
2026-05-01 CCA490 SIN → CKG May 1, 07:10 UTCMay 1, 07:40 UTC30m
2026-05-01 CCA489 CKG → SIN May 1, 03:50 UTCMay 1, 04:35 UTC45m
2026-04-29 CCA4015 CKG → CGQ Apr 29, 01:30 UTCApr 29, 01:45 UTC15m
2026-04-28 CCA440 ICN → CKG Apr 28, 05:20 UTCApr 28, 05:30 UTC10m
2026-04-28 CCA439 CKG → ICN Apr 28, 03:30 UTCApr 28, 03:45 UTC15m
2026-04-26 CCA4346 SZX → CKG Apr 26, 15:25 UTCApr 26, 15:35 UTC10m
2026-04-26 CCA440 ICN → CKG Apr 26, 06:20 UTCApr 26, 06:35 UTC15m
2026-04-25 CCA4014 YCU → CKG Apr 25, 06:15 UTCApr 25, 06:25 UTC10m
2026-04-24 CCA4346 SZX → CKG Apr 24, 15:55 UTCApr 24, 16:05 UTC10m
2026-04-23 CCA490 SIN → CKG Apr 23, 07:20 UTCApr 23, 09:45 UTC2h 25m
2026-04-23 CCA489 CKG → SIN Apr 23, 02:40 UTCApr 23, 05:05 UTC2h 25m
2026-04-22 CCA4015 CKG → CGQ Apr 22, 01:40 UTCApr 22, 02:00 UTC20m
2026-04-21 CCA440 ICN → CKG Apr 21, 05:45 UTCApr 21, 05:55 UTC10m
2026-04-20 CCA4346 - Apr 20, 14:50 UTCApr 20, 15:00 UTC10m
2026-04-19 CCA490 SIN → CKG Apr 19, 07:10 UTCApr 19, 09:45 UTC2h 35m
2026-04-19 CCA489 CKG → SIN Apr 19, 02:10 UTCApr 19, 04:25 UTC2h 15m
2026-04-18 CCA4346 - Apr 18, 14:35 UTCApr 18, 14:45 UTC10m
2026-04-18 CCA4345 - Apr 18, 12:40 UTCApr 18, 12:50 UTC10m
2026-04-17 CCA490 SIN → CKG Apr 17, 07:20 UTCApr 17, 09:15 UTC1h 55m
2026-04-17 CCA489 CKG → SIN Apr 17, 03:20 UTCApr 17, 04:50 UTC1h 31m
2026-04-17 CCA489 CKG → SIN Apr 17, 02:59 UTCApr 17, 03:15 UTC15m
2026-04-16 CCA4346 - Apr 16, 13:50 UTCApr 16, 14:00 UTC10m
2026-04-15 CCA490 SIN → CKG Apr 15, 09:00 UTCApr 15, 09:15 UTC15m
2026-04-15 CCA490 SIN → CKG Apr 15, 07:10 UTCApr 15, 08:55 UTC1h 45m
2026-04-15 CCA489 CKG → SIN Apr 15, 03:10 UTCApr 15, 04:50 UTC1h 40m

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-1221 page for operator, model, and routing details .

Mode-S 781328 frequently asked

What is Mode-S code 781328?
781328 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1221.
Where is Mode-S 781328 registered?
Mode-S code 781328 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781328 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781328, octal 36011450, decimal 7,869,224.
What flights does 781328 operate?
Mode-S 781328 has broadcast 11 distinct callsigns, including CCA440, CCA4346, CCA439, CCA490, CCA489.