Apparatus

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sensors Mode-S transponder

781ACD

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-321R · AIRBUS A-321

Hex
781ACD
Octal
36015315
Decimal
7,871,181
Country
CN
Tail
B-321R
Type
A321
No current signal · last broadcast 1d ago
Flights observed
135
Distinct callsigns
15
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 781ACD.

Country allocation

The ICAO 24-bit address 781ACD 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 15 distinct

Callsign Airline Flights Last seen
CHB6312 - 29 2026-07-09
CHB6230 - 28 2026-07-16
CHB6334 - 20 2026-06-30
CHB6333 - 20 2026-06-28
CHB6311 - 18 2026-07-16
CHB6544 - 5 2026-07-09
CHB6229 China West Air 5 2026-06-07
CHB6543 - 2 2026-07-09
CHB6454 China West Air 1 2026-05-29
CHB6453 - 1 2026-07-01
CHB6372 China West Air 1 2026-04-15
CHB6371 China West Air 1 2026-04-15
CHB6305 - 1 2026-04-27
CHB6204 China West Air 1 2026-06-26
CHB6203 China West Air 1 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CHB6230 - Jul 16, 16:09 UTCJul 16, 16:25 UTC15m
2026-07-16 CHB6311 - Jul 16, 14:10 UTCJul 16, 14:25 UTC15m
2026-07-09 CHB6312 - Jul 9, 17:55 UTCJul 9, 18:15 UTC20m
2026-07-09 CHB6544 - Jul 9, 16:00 UTCJul 9, 16:15 UTC15m
2026-07-09 CHB6544 - Jul 9, 09:05 UTCJul 9, 09:25 UTC20m
2026-07-09 CHB6543 - Jul 9, 02:05 UTCJul 9, 02:15 UTC10m
2026-07-07 CHB6230 - Jul 7, 21:00 UTCJul 7, 21:10 UTC10m
2026-07-07 CHB6544 - Jul 7, 19:25 UTCJul 7, 19:50 UTC25m
2026-07-04 CHB6230 - Jul 4, 18:50 UTCJul 4, 19:05 UTC15m
2026-07-04 CHB6311 - Jul 4, 16:35 UTCJul 4, 17:00 UTC25m
2026-07-01 CHB6312 - Jul 1, 15:30 UTCJul 1, 15:45 UTC15m
2026-07-01 CHB6453 - Jul 1, 00:05 UTCJul 1, 00:20 UTC15m
2026-06-30 CHB6312 - Jun 30, 18:05 UTCJun 30, 18:25 UTC20m
2026-06-30 CHB6334 - Jun 30, 16:15 UTCJun 30, 16:40 UTC25m
2026-06-28 CHB6230 - Jun 28, 17:50 UTCJun 28, 18:05 UTC15m
2026-06-28 CHB6334 - Jun 28, 16:19 UTCJun 28, 16:39 UTC20m
2026-06-28 CHB6333 - Jun 28, 02:10 UTCJun 28, 02:20 UTC10m
2026-06-26 CHB6204 SYX → CKG Jun 26, 09:14 UTCJun 26, 09:50 UTC35m
2026-06-26 CHB6203 CKG → SYX Jun 26, 06:45 UTCJun 26, 07:20 UTC35m
2026-06-23 CHB6230 - Jun 23, 16:59 UTCJun 23, 17:15 UTC15m
2026-06-23 CHB6311 - Jun 23, 14:35 UTCJun 23, 14:49 UTC15m
2026-06-21 CHB6312 - Jun 21, 15:25 UTCJun 21, 15:44 UTC20m
2026-06-21 CHB6311 - Jun 21, 13:44 UTCJun 21, 14:10 UTC25m
2026-06-20 CHB6312 - Jun 20, 15:49 UTCJun 20, 16:00 UTC10m
2026-06-20 CHB6311 - Jun 20, 13:39 UTCJun 20, 13:55 UTC15m
2026-06-18 CHB6312 - Jun 18, 22:00 UTCJun 18, 22:10 UTC10m
2026-06-18 CHB6311 - Jun 18, 20:10 UTCJun 18, 20:35 UTC25m
2026-06-17 - - Jun 17, 23:45 UTCJun 18, 00:00 UTC15m
2026-06-16 CHB6312 - Jun 16, 18:20 UTCJun 16, 18:39 UTC20m
2026-06-16 CHB6311 - Jun 16, 15:55 UTCJun 16, 16:15 UTC20m
2026-06-14 CHB6312 SZX → CGO Jun 14, 17:35 UTCJun 14, 17:55 UTC20m
2026-06-14 CHB6334 TNA → SZX Jun 14, 15:55 UTCJun 14, 16:05 UTC10m
2026-06-14 CHB6333 - Jun 14, 02:50 UTCJun 14, 03:00 UTC10m
2026-06-13 CHB6230 SZX → CKG Jun 13, 17:10 UTCJun 13, 17:25 UTC15m
2026-06-13 CHB6334 TNA → SZX Jun 13, 15:40 UTCJun 13, 15:50 UTC10m
2026-06-13 CHB6333 SZX → TNA Jun 13, 02:05 UTCJun 13, 02:15 UTC10m
2026-06-11 CHB6230 SZX → CKG Jun 11, 16:20 UTCJun 11, 16:35 UTC15m
2026-06-10 CHB6312 SZX → CGO Jun 10, 15:55 UTCJun 10, 16:10 UTC15m
2026-06-07 CHB6312 SZX → CGO Jun 7, 17:45 UTCJun 7, 18:05 UTC20m
2026-06-07 CHB6334 TNA → SZX Jun 7, 15:50 UTCJun 7, 16:00 UTC10m
2026-06-07 CHB6333 SZX → TNA Jun 7, 02:55 UTCJun 7, 03:10 UTC15m
2026-06-07 CHB6229 CKG → SZX Jun 7, 00:39 UTCJun 7, 00:49 UTC10m
2026-06-06 CHB6230 SZX → CKG Jun 6, 18:19 UTCJun 6, 18:35 UTC15m
2026-06-06 CHB6333 SZX → TNA Jun 6, 04:15 UTCJun 6, 04:35 UTC20m
2026-06-05 CHB6230 SZX → CKG Jun 5, 17:10 UTCJun 5, 17:25 UTC15m
2026-06-05 CHB6334 TNA → SZX Jun 5, 15:10 UTCJun 5, 15:25 UTC15m
2026-06-05 CHB6333 SZX → TNA Jun 5, 02:00 UTCJun 5, 02:10 UTC10m
2026-06-04 CHB6230 SZX → CKG Jun 4, 17:10 UTCJun 4, 17:25 UTC15m
2026-06-04 CHB6334 TNA → SZX Jun 4, 15:30 UTCJun 4, 15:40 UTC10m
2026-06-04 CHB6333 SZX → TNA Jun 4, 03:20 UTCJun 4, 03:35 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-321R page for operator, model, and routing details .

Mode-S 781ACD frequently asked

What is Mode-S code 781ACD?
781ACD is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-321R.
Where is Mode-S 781ACD registered?
Mode-S code 781ACD is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781ACD 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 781ACD, octal 36015315, decimal 7,871,181.
What flights does 781ACD operate?
Mode-S 781ACD has broadcast 15 distinct callsigns, including CHB6312, CHB6230, CHB6334, CHB6333, CHB6311.