Apparatus

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sensors Mode-S transponder

781C6C

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-325Y · AIRBUS A-320neo

Hex
781C6C
Octal
36016154
Decimal
7,871,596
Country
CN
Tail
B-325Y
Type
A20N
No current signal · last broadcast 4d ago
Flights observed
54
Distinct callsigns
20
Country
CN
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 781C6C.

Country allocation

The ICAO 24-bit address 781C6C 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
CCA4173 - 4 2026-07-11
CCA480 - 3 2026-07-03
CCA479 - 3 2026-07-03
CCA4340 Air China 3 2026-06-28
CCA4338 - 3 2026-06-28
CCA4326 Air China 3 2026-04-29
CCA427 - 3 2026-07-09
CCA4174 - 3 2026-07-11
CCA4172 - 3 2026-07-06
CCA4171 - 3 2026-07-06
CCA4336 - 2 2026-06-15
CCA4335 - 2 2026-06-15
CCA4314 Air China 2 2026-04-30
CCA428 - 2 2026-07-09
CCA4339 Air China 1 2026-06-12
CCA4337 Air China 1 2026-04-27
CCA4325 Air China 1 2026-04-26
CCA4324 Air China 1 2026-04-26
CCA4316 Air China 1 2026-05-31
CCA4313 Air China 1 2026-04-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CCA2694 - Jul 14, 12:55 UTCJul 14, 13:10 UTC15m
2026-07-11 CCA4174 - Jul 11, 19:05 UTCJul 11, 19:25 UTC20m
2026-07-11 CCA4173 - Jul 11, 15:50 UTCJul 11, 16:00 UTC10m
2026-07-11 CCA4173 - Jul 11, 14:35 UTCJul 11, 15:10 UTC35m
2026-07-11 CCA4061 - Jul 11, 01:35 UTCJul 11, 01:55 UTC20m
2026-07-09 CCA428 - Jul 9, 09:40 UTCJul 10, 02:15 UTC16h 35m
2026-07-09 CCA427 - Jul 9, 07:15 UTCJul 9, 07:45 UTC30m
2026-07-06 CCA4174 - Jul 6, 15:00 UTCJul 6, 15:20 UTC20m
2026-07-06 CCA4173 - Jul 6, 13:00 UTCJul 6, 13:25 UTC25m
2026-07-06 CCA4172 - Jul 6, 04:55 UTCJul 6, 05:15 UTC20m
2026-07-06 CCA4171 - Jul 6, 02:00 UTCJul 6, 02:30 UTC30m
2026-07-03 CCA480 - Jul 3, 18:50 UTCJul 3, 20:35 UTC1h 45m
2026-07-03 CCA479 - Jul 3, 15:20 UTCJul 3, 17:15 UTC1h 55m
2026-07-01 CCA4174 - Jul 1, 14:15 UTCJul 1, 14:45 UTC30m
2026-07-01 CCA4172 - Jul 1, 03:55 UTCJul 1, 04:15 UTC20m
2026-07-01 CCA4171 - Jul 1, 01:45 UTCJul 1, 02:10 UTC25m
2026-06-28 CCA4340 SZX → CTU Jun 28, 23:29 UTCJun 28, 23:39 UTC10m
2026-06-28 CCA4338 - Jun 28, 03:45 UTCJun 28, 03:55 UTC10m
2026-06-24 CCA4118 - Jun 24, 14:00 UTCJun 24, 14:24 UTC25m
2026-06-15 CCA4336 - Jun 15, 17:45 UTCJun 15, 17:59 UTC15m
2026-06-15 CCA4335 - Jun 15, 16:04 UTCJun 15, 16:19 UTC15m
2026-06-12 CCA4340 SZX → CTU Jun 12, 23:40 UTCJun 12, 23:55 UTC15m
2026-06-12 CCA4339 CTU → SZX Jun 12, 15:00 UTCJun 12, 15:10 UTC10m
2026-06-09 CCA4338 SZX → CTU Jun 9, 03:20 UTCJun 9, 03:30 UTC10m
2026-06-01 CCA4336 SZX → CTU Jun 1, 13:40 UTCJun 1, 13:55 UTC15m
2026-06-01 CCA4335 CTU → SZX Jun 1, 11:30 UTCJun 1, 11:40 UTC10m
2026-05-31 CCA4316 HAK → CTU May 31, 10:00 UTCMay 31, 10:20 UTC20m
2026-05-28 CCA4340 SZX → CTU May 28, 23:30 UTCMay 28, 23:40 UTC10m
2026-05-19 CCA2664 - May 19, 11:15 UTCMay 19, 11:30 UTC15m
2026-05-19 CCA2663 - May 19, 08:55 UTCMay 19, 09:05 UTC10m
2026-05-15 CCA480 MNL → TFU May 15, 18:45 UTCMay 15, 20:25 UTC1h 40m
2026-05-15 CCA479 TFU → MNL May 15, 10:10 UTCMay 15, 17:00 UTC6h 49m
2026-05-15 CCA427 CTU → HKG May 15, 07:40 UTCMay 15, 08:05 UTC25m
2026-05-06 CCA480 MNL → TFU May 6, 18:55 UTCMay 6, 20:36 UTC1h 41m
2026-05-06 CCA479 TFU → MNL May 6, 15:15 UTCMay 6, 17:00 UTC1h 45m
2026-05-03 - - May 3, 01:35 UTCMay 3, 01:45 UTC10m
2026-04-30 CCA4314 SZX → CTU Apr 30, 09:35 UTCApr 30, 09:45 UTC10m
2026-04-29 CCA4326 SZX → CTU Apr 29, 08:50 UTCApr 29, 09:00 UTC11m
2026-04-27 CCA4338 SZX → CTU Apr 27, 03:25 UTCApr 27, 03:40 UTC15m
2026-04-27 CCA4337 CTU → SZX Apr 27, 01:40 UTCApr 27, 01:50 UTC10m
2026-04-26 CCA4324 SZX → CTU Apr 26, 12:45 UTCApr 26, 12:55 UTC10m
2026-04-26 CCA4326 SZX → CTU Apr 26, 05:10 UTCApr 26, 05:20 UTC10m
2026-04-26 CCA4325 CTU → SZX Apr 26, 02:40 UTCApr 26, 03:00 UTC20m
2026-04-22 CCA4326 SZX → CTU Apr 22, 05:10 UTCApr 22, 05:25 UTC15m
2026-04-21 CCA4314 SZX → CTU Apr 21, 09:30 UTCApr 21, 09:45 UTC15m
2026-04-21 CCA4313 CTU → SZX Apr 21, 07:25 UTCApr 21, 07:35 UTC10m
2026-04-21 CCA4184 PEK → CTU Apr 21, 01:15 UTCApr 21, 01:40 UTC25m
2026-04-20 CCA4116 PEK → CTU Apr 20, 07:00 UTCApr 20, 07:25 UTC25m
2026-04-19 CCA4182 PEK → CTU Apr 19, 23:05 UTCApr 19, 23:25 UTC20m
2026-04-19 CCA4173 KMG → PEK Apr 19, 12:00 UTCApr 19, 12:20 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-325Y page for operator, model, and routing details .

Mode-S 781C6C frequently asked

What is Mode-S code 781C6C?
781C6C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-325Y.
Where is Mode-S 781C6C registered?
Mode-S code 781C6C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C6C broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C6C, octal 36016154, decimal 7,871,596.
What flights does 781C6C operate?
Mode-S 781C6C has broadcast 20 distinct callsigns, including CCA4173, CCA480, CCA479, CCA4340, CCA4338.