Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781BB2

ICAO 24-bit transponder address · allocated to China

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

Hex
781BB2
Octal
36015662
Decimal
7,871,410
Country
CN
Tail
B-324H
Type
A20N
No current signal · last broadcast 1h ago
Flights observed
70
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781BB2.

Country allocation

The ICAO 24-bit address 781BB2 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
CCA4340 Air China 10 2026-06-26
CCA4339 - 6 2026-06-24
CCA426 - 6 2026-07-11
CCA4164 - 3 2026-07-18
CCA480 Air China 2 2026-04-29
CCA479 Air China 2 2026-04-29
CCA4184 - 2 2026-07-06
CCA1324 - 2 2026-07-04
CCA9614 - 1 2026-07-05
CCA9613 - 1 2026-07-04
CCA9505 - 1 2026-07-01
CCA8676 - 1 2026-07-16
CCA4336 Air China 1 2026-06-04
CCA4335 Air China 1 2026-06-04
CCA4314 - 1 2026-06-24
CCA4313 - 1 2026-06-24
CCA4297 Air China 1 2026-06-17
CCA428 Air China 1 2026-04-28
CCA427 Air China 1 2026-04-28
CCA425 - 1 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CCA2741 TFU → SHE Jul 24, 01:40 UTCJul 24, 02:00 UTC20m
2026-07-18 CCA4164 - Jul 18, 06:25 UTCJul 18, 06:50 UTC25m
2026-07-18 CCA4163 KWE → PEK Jul 18, 03:30 UTCJul 18, 03:45 UTC15m
2026-07-16 CCA8676 - Jul 16, 13:40 UTCJul 16, 13:49 UTC10m
2026-07-15 CCA4166 - Jul 15, 13:35 UTCJul 15, 14:00 UTC25m
2026-07-15 CCA4165 - Jul 15, 11:20 UTCJul 15, 11:35 UTC15m
2026-07-14 CCA4164 - Jul 14, 05:15 UTCJul 14, 05:40 UTC25m
2026-07-11 CCA426 - Jul 11, 11:10 UTCJul 11, 20:30 UTC9h 20m
2026-07-10 CCA426 - Jul 10, 20:35 UTCJul 11, 20:30 UTC23h 55m
2026-07-10 CCA426 - Jul 10, 18:35 UTCJul 11, 18:30 UTC23h 55m
2026-07-10 CCA426 - Jul 10, 18:15 UTCJul 11, 13:15 UTC19h 0m
2026-07-10 CCA425 - Jul 10, 12:35 UTCJul 11, 12:30 UTC23h 56m
2026-07-10 CCA426 - Jul 10, 05:25 UTCJul 10, 20:35 UTC15h 10m
2026-07-10 CCA426 - Jul 10, 01:55 UTCJul 10, 20:35 UTC18h 40m
2026-07-06 CCA4104 - Jul 6, 11:45 UTCJul 6, 12:10 UTC25m
2026-07-06 CCA4184 - Jul 6, 01:25 UTCJul 6, 01:45 UTC20m
2026-07-05 CCA1513 - Jul 5, 07:45 UTCJul 5, 08:00 UTC15m
2026-07-05 CCA9614 - Jul 5, 03:35 UTCJul 5, 03:55 UTC20m
2026-07-04 CCA9613 - Jul 4, 22:45 UTCJul 4, 23:10 UTC25m
2026-07-04 CCA1324 - Jul 4, 16:45 UTCJul 4, 16:55 UTC10m
2026-07-04 CCA1324 - Jul 4, 13:15 UTCJul 4, 13:30 UTC15m
2026-07-04 CCA1323 - Jul 4, 08:50 UTCJul 4, 09:05 UTC15m
2026-07-04 CCA1268 - Jul 4, 03:20 UTCJul 4, 03:40 UTC20m
2026-07-03 CCA1267 - Jul 3, 22:45 UTCJul 3, 23:10 UTC25m
2026-07-03 CCA1262 - Jul 3, 14:05 UTCJul 3, 14:30 UTC25m
2026-07-03 CCA1261 PEK → XNN Jul 3, 07:50 UTCJul 3, 08:15 UTC25m
2026-07-01 CCA9505 - Jul 1, 10:15 UTCJul 1, 10:30 UTC15m
2026-06-26 CCA4340 SZX → CTU Jun 26, 23:39 UTCJun 26, 23:55 UTC15m
2026-06-24 CCA4340 SZX → CTU Jun 24, 23:24 UTCJun 24, 23:34 UTC10m
2026-06-24 CCA4339 - Jun 24, 15:49 UTCJun 24, 15:59 UTC10m
2026-06-24 CCA4314 - Jun 24, 09:29 UTCJun 24, 09:39 UTC10m
2026-06-24 CCA4313 - Jun 24, 07:40 UTCJun 24, 07:54 UTC15m
2026-06-24 CCA4184 - Jun 24, 01:04 UTCJun 24, 01:24 UTC20m
2026-06-21 CCA4340 SZX → CTU Jun 21, 23:34 UTCJun 21, 23:50 UTC15m
2026-06-19 CCA4340 SZX → CTU Jun 19, 05:24 UTCJun 19, 05:34 UTC10m
2026-06-19 CCA4339 - Jun 19, 00:05 UTCJun 19, 00:29 UTC24m
2026-06-17 CCA4297 CTU → HAK Jun 17, 04:15 UTCJun 17, 04:30 UTC15m
2026-06-14 CCA4340 SZX → CTU Jun 14, 23:35 UTCJun 14, 23:50 UTC15m
2026-06-11 CCA4340 SZX → CTU Jun 11, 23:35 UTCJun 11, 23:50 UTC15m
2026-06-11 CCA4339 CTU → SZX Jun 11, 15:40 UTCJun 11, 15:50 UTC10m
2026-06-06 CCA4340 SZX → CTU Jun 6, 23:19 UTCJun 6, 23:35 UTC15m
2026-06-06 CCA4339 CTU → SZX Jun 6, 16:55 UTCJun 6, 17:05 UTC10m
2026-06-04 CCA4336 SZX → CTU Jun 4, 13:35 UTCJun 4, 13:45 UTC10m
2026-06-04 CCA4335 CTU → SZX Jun 4, 11:35 UTCJun 4, 11:45 UTC10m
2026-05-30 CCA4340 SZX → CTU May 30, 23:45 UTCMay 31, 00:00 UTC15m
2026-05-29 CCA4186 PEK → CTU May 29, 02:20 UTCMay 29, 02:45 UTC25m
2026-05-28 CCA1264 - May 28, 14:25 UTCMay 28, 14:45 UTC20m
2026-05-28 CCA1263 - May 28, 10:50 UTCMay 28, 11:15 UTC25m
2026-05-28 CCA1399 PEK → CSX May 28, 02:35 UTCMay 28, 03:00 UTC25m
2026-05-27 CCA1294 URC → PEK May 27, 15:50 UTCMay 27, 16:05 UTC15m

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

Mode-S 781BB2 frequently asked

What is Mode-S code 781BB2?
781BB2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-324H.
Where is Mode-S 781BB2 registered?
Mode-S code 781BB2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781BB2 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781BB2, octal 36015662, decimal 7,871,410.
What flights does 781BB2 operate?
Mode-S 781BB2 has broadcast 20 distinct callsigns, including CCA4340, CCA4339, CCA426, CCA4164, CCA480.