Apparatus

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sensors Mode-S transponder

781BB3

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-324J · AIRBUS A-320neo

Hex
781BB3
Octal
36015663
Decimal
7,871,411
Country
CN
Tail
B-324J
Type
A20N
No current signal · last broadcast 1d ago
Flights observed
61
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781BB3.

Country allocation

The ICAO 24-bit address 781BB3 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
CCA9723 - 6 2026-07-11
CCA4340 - 6 2026-07-16
CCA9724 - 5 2026-07-12
CCA9634 - 2 2026-07-14
CCA480 Air China 2 2026-05-08
CCA479 Air China 2 2026-05-08
CCA4339 - 2 2026-07-16
CCA4338 - 2 2026-06-24
CCA4314 - 2 2026-07-15
CCA4313 - 2 2026-07-15
CCA4312 - 2 2026-06-14
CCA4186 - 2 2026-07-07
CCA9711 - 1 2026-07-10
CCA9614 - 1 2026-07-03
CCA9613 - 1 2026-07-02
CCA4336 Air China 1 2026-05-26
CCA4326 - 1 2026-06-16
CCA4325 - 1 2026-06-16
CCA4311 Air China 1 2026-06-13
CCA4298 Air China 1 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CCA4340 - Jul 16, 23:35 UTCJul 16, 23:44 UTC10m
2026-07-16 CCA4339 - Jul 16, 16:00 UTCJul 16, 16:09 UTC10m
2026-07-15 CCA4314 - Jul 15, 11:00 UTCJul 15, 11:10 UTC10m
2026-07-15 CCA4313 - Jul 15, 09:05 UTCJul 15, 09:15 UTC10m
2026-07-15 CCA4184 - Jul 15, 02:00 UTCJul 15, 02:20 UTC20m
2026-07-14 CCA9634 - Jul 14, 05:05 UTCJul 14, 11:55 UTC6h 50m
2026-07-13 CCA1825 - Jul 13, 23:25 UTCJul 13, 23:35 UTC10m
2026-07-13 CCA9634 - Jul 13, 04:55 UTCJul 13, 11:50 UTC6h 55m
2026-07-12 CCA1841 - Jul 12, 22:50 UTCJul 12, 23:05 UTC15m
2026-07-12 CCA1849 - Jul 12, 12:30 UTCJul 12, 12:45 UTC15m
2026-07-12 CCA9724 - Jul 12, 01:15 UTCJul 12, 09:30 UTC8h 15m
2026-07-11 CCA1636 - Jul 11, 18:05 UTCJul 11, 18:20 UTC15m
2026-07-11 CCA9724 - Jul 11, 09:40 UTCJul 11, 10:05 UTC25m
2026-07-11 CCA9723 - Jul 11, 00:40 UTCJul 11, 01:00 UTC20m
2026-07-10 CCA9711 - Jul 10, 12:05 UTCJul 10, 17:35 UTC5h 30m
2026-07-10 CCA9724 - Jul 10, 09:05 UTCJul 10, 09:30 UTC25m
2026-07-10 CCA9723 - Jul 10, 00:40 UTCJul 10, 01:00 UTC20m
2026-07-09 CCA9723 - Jul 9, 00:45 UTCJul 9, 09:40 UTC8h 55m
2026-07-07 CCA4186 - Jul 7, 02:25 UTCJul 7, 02:45 UTC20m
2026-07-06 CCA1927 - Jul 6, 12:20 UTCJul 6, 12:40 UTC20m
2026-07-06 CCA9723 - Jul 6, 00:40 UTCJul 6, 01:00 UTC20m
2026-07-05 CCA9724 - Jul 5, 10:30 UTCJul 5, 10:45 UTC15m
2026-07-05 CCA9723 - Jul 5, 00:30 UTCJul 5, 00:55 UTC25m
2026-07-04 CCA9724 - Jul 4, 06:10 UTCJul 4, 09:45 UTC3h 35m
2026-07-04 CCA9723 - Jul 4, 00:45 UTCJul 4, 01:10 UTC25m
2026-07-03 CCA1444 - Jul 3, 17:10 UTCJul 3, 17:30 UTC20m
2026-07-03 CCA1443 - Jul 3, 10:40 UTCJul 3, 10:50 UTC10m
2026-07-03 CCA9614 - Jul 3, 03:35 UTCJul 3, 03:55 UTC20m
2026-07-02 CCA9613 - Jul 2, 22:50 UTCJul 2, 23:15 UTC25m
2026-07-01 CCA1403 - Jul 1, 22:50 UTCJul 1, 23:10 UTC20m
2026-07-01 CCA1458 - Jul 1, 09:40 UTCJul 1, 14:40 UTC5h 0m
2026-07-01 CCA1643 - Jul 1, 00:25 UTCJul 1, 00:35 UTC10m
2026-06-30 CCA4186 - Jun 30, 02:25 UTCJun 30, 02:50 UTC25m
2026-06-24 CCA4338 - Jun 24, 03:35 UTCJun 24, 03:44 UTC10m
2026-06-22 CCA4340 SZX → CTU Jun 22, 23:35 UTCJun 22, 23:45 UTC10m
2026-06-20 CCA4298 HAK → CTU Jun 20, 06:39 UTCJun 20, 06:49 UTC10m
2026-06-20 CCA4297 CTU → HAK Jun 20, 04:04 UTCJun 20, 04:20 UTC15m
2026-06-17 CCA4314 - Jun 17, 11:30 UTCJun 17, 11:40 UTC10m
2026-06-16 CCA4326 - Jun 16, 08:00 UTCJun 16, 08:20 UTC20m
2026-06-16 CCA4325 - Jun 16, 03:00 UTCJun 16, 03:05 UTC5m
2026-06-14 CCA4312 - Jun 14, 12:35 UTCJun 14, 12:45 UTC10m
2026-06-13 CCA4312 SZX → CTU Jun 13, 12:25 UTCJun 13, 12:35 UTC10m
2026-06-13 CCA4311 CTU → SZX Jun 13, 10:55 UTCJun 13, 11:05 UTC10m
2026-06-13 CCA4338 - Jun 13, 03:25 UTCJun 13, 03:35 UTC10m
2026-06-03 CCA4340 SZX → CTU Jun 3, 23:30 UTCJun 3, 23:40 UTC10m
2026-05-27 CCA4340 SZX → CTU May 27, 23:25 UTCMay 27, 23:45 UTC20m
2026-05-26 CCA4336 SZX → CTU May 26, 13:34 UTCMay 26, 13:50 UTC15m
2026-05-24 CCA4340 SZX → CTU May 24, 23:30 UTCMay 24, 23:46 UTC16m
2026-05-18 CCA4340 SZX → CTU May 18, 23:25 UTCMay 18, 23:40 UTC15m
2026-05-18 CCA4339 CTU → SZX May 18, 15:05 UTCMay 18, 15:15 UTC10m

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-324J page for operator, model, and routing details .

Mode-S 781BB3 frequently asked

What is Mode-S code 781BB3?
781BB3 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-324J.
Where is Mode-S 781BB3 registered?
Mode-S code 781BB3 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781BB3 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 781BB3, octal 36015663, decimal 7,871,411.
What flights does 781BB3 operate?
Mode-S 781BB3 has broadcast 20 distinct callsigns, including CCA9723, CCA4340, CCA9724, CCA9634, CCA480.