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 13h ago
Flights observed
94
Distinct callsigns
17
Country
CN
Last broadcast
13h 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 17 distinct

Callsign Airline Flights Last seen
CCA440 - 19 2026-07-11
CCA439 - 15 2026-07-11
CCA489 - 11 2026-07-14
CCA490 - 10 2026-07-14
CCA4346 Air China 9 2026-06-02
CCA4011 Air China 5 2026-06-13
CCA407 - 4 2026-07-10
CCA482 Air China 3 2026-06-05
CCA481 - 3 2026-06-05
CCA4015 Air China 3 2026-05-06
CCA4014 Air China 3 2026-05-21
CCA454 - 2 2026-07-09
CCA453 - 2 2026-07-09
CCA4565 Air China 1 2026-06-16
CCA4345 - 1 2026-04-18
CCA4344 - 1 2026-07-06
CCA4013 Air China 1 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CCA490 - Jul 14, 07:30 UTCJul 14, 10:25 UTC2h 55m
2026-07-14 CCA489 - Jul 14, 01:45 UTCJul 14, 04:35 UTC2h 50m
2026-07-11 CCA440 - Jul 11, 05:25 UTCJul 11, 05:45 UTC20m
2026-07-11 CCA439 - Jul 11, 03:40 UTCJul 11, 04:01 UTC20m
2026-07-10 CCA407 - Jul 10, 12:05 UTCJul 11, 02:50 UTC14h 45m
2026-07-10 CCA440 - Jul 10, 05:30 UTCJul 11, 02:50 UTC21h 20m
2026-07-10 CCA439 - Jul 10, 03:45 UTCJul 10, 04:00 UTC15m
2026-07-09 CCA454 - Jul 9, 10:20 UTCJul 10, 02:45 UTC16h 25m
2026-07-09 CCA453 - Jul 9, 08:20 UTCJul 9, 08:35 UTC15m
2026-07-08 CCA454 - Jul 8, 10:20 UTCJul 8, 10:40 UTC20m
2026-07-08 CCA453 - Jul 8, 08:20 UTCJul 8, 08:45 UTC25m
2026-07-07 CCA407 - Jul 7, 12:05 UTCJul 8, 07:30 UTC19h 25m
2026-07-07 CCA407 - Jul 7, 11:55 UTCJul 8, 07:30 UTC19h 35m
2026-07-07 CCA440 - Jul 7, 05:35 UTCJul 7, 05:55 UTC20m
2026-07-07 CCA439 - Jul 7, 03:45 UTCJul 7, 04:05 UTC20m
2026-07-06 CCA4344 - Jul 6, 03:15 UTCJul 6, 03:25 UTC10m
2026-07-01 CCA407 - Jul 1, 06:15 UTCJul 1, 18:15 UTC12h 0m
2026-07-01 CCA439 - Jul 1, 03:25 UTCJul 1, 03:50 UTC25m
2026-06-29 CCA440 - Jun 29, 05:20 UTCJun 29, 05:34 UTC15m
2026-06-29 CCA439 - Jun 29, 03:20 UTCJun 29, 03:44 UTC25m
2026-06-21 CCA490 - Jun 21, 07:25 UTCJun 21, 10:29 UTC3h 5m
2026-06-21 CCA489 - Jun 21, 01:39 UTCJun 21, 04:44 UTC3h 5m
2026-06-19 CCA490 - Jun 19, 07:25 UTCJun 19, 10:35 UTC3h 10m
2026-06-18 CCA489 - Jun 18, 14:30 UTCJun 19, 04:29 UTC13h 59m
2026-06-18 CCA440 - Jun 18, 05:25 UTCJun 18, 12:00 UTC6h 35m
2026-06-18 CCA439 - Jun 18, 03:30 UTCJun 18, 03:50 UTC20m
2026-06-16 CCA4565 CKG → XMN Jun 16, 01:10 UTCJun 16, 01:25 UTC15m
2026-06-14 CCA490 - Jun 14, 07:25 UTCJun 14, 10:30 UTC3h 5m
2026-06-14 CCA489 - Jun 14, 01:50 UTCJun 14, 04:35 UTC2h 45m
2026-06-13 CCA4011 CKG → HRB Jun 13, 01:05 UTCJun 13, 01:20 UTC15m
2026-06-12 CCA4011 CKG → HRB Jun 12, 01:00 UTCJun 12, 01:20 UTC20m
2026-06-11 CCA4011 CKG → HRB Jun 11, 01:10 UTCJun 11, 01:25 UTC15m
2026-06-06 CCA4011 CKG → HRB Jun 6, 11:49 UTCJun 7, 02:25 UTC14h 35m
2026-06-06 CCA440 ICN → CKG Jun 6, 05:20 UTCJun 7, 02:25 UTC21h 5m
2026-06-06 CCA439 CKG → ICN Jun 6, 03:15 UTCJun 6, 03:40 UTC25m
2026-06-05 CCA482 MNL → CKG Jun 5, 18:00 UTCJun 6, 02:20 UTC8h 20m
2026-06-05 CCA481 - Jun 5, 07:15 UTCJun 5, 16:15 UTC9h 0m
2026-06-05 CCA489 CKG → SIN Jun 5, 01:45 UTCJun 5, 04:35 UTC2h 50m
2026-06-03 CCA440 ICN → CKG Jun 3, 05:25 UTCJun 3, 05:45 UTC20m
2026-06-03 CCA439 CKG → ICN Jun 3, 03:30 UTCJun 3, 03:55 UTC25m
2026-06-02 CCA4346 SZX → CKG Jun 2, 13:00 UTCJun 2, 13:10 UTC10m
2026-05-31 CCA4011 CKG → HRB May 31, 00:55 UTCMay 31, 01:11 UTC16m
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

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 13h 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 17 distinct callsigns, including CCA440, CCA439, CCA489, CCA490, CCA4346.