Apparatus

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sensors Mode-S transponder

781A9D

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-321H · AIRBUS A-321neo

Hex
781A9D
Octal
36015235
Decimal
7,871,133
Country
CN
Tail
B-321H
Type
A21N
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
165
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S 781A9D.

Country allocation

The ICAO 24-bit address 781A9D 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
CQH6575 Spring Airlines 19 2026-07-26
CQH6582 Spring Airlines 17 2026-07-26
CQH6565 Spring Airlines 14 2026-07-24
CQH6576 Spring Airlines 13 2026-07-24
CQH6566 Spring Airlines 12 2026-07-25
CQH8955 - 8 2026-06-25
CQH8775 - 8 2026-06-25
CQH6581 Spring Airlines 8 2026-07-26
CQH8950 - 7 2026-06-24
CQH8776 - 7 2026-06-25
CQH8956 Spring Airlines 6 2026-06-25
CQH8949 - 6 2026-06-24
CQH8882 Spring Airlines 6 2026-06-10
CQH8881 - 6 2026-06-14
CQH8918 Spring Airlines 4 2026-05-22
CQH8917 Spring Airlines 4 2026-05-22
CQH8755 - 3 2026-07-17
CQH8929 Spring Airlines 2 2026-04-23
CQH6224 - 2 2026-04-29
CQH8932 Spring Airlines 1 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CQH8756 BKK → PVG Jul 26, 20:00 UTCJul 26, 20:30 UTC30m
2026-07-26 CQH6582 KIX → PVG Jul 26, 10:40 UTCJul 26, 18:30 UTC7h 50m
2026-07-26 CQH6581 PVG → KIX Jul 26, 03:50 UTCJul 26, 09:15 UTC5h 26m
2026-07-26 CQH6575 PVG → KIX Jul 26, 01:30 UTCJul 26, 02:35 UTC1h 5m
2026-07-25 CQH6566 KIX → PVG Jul 25, 06:05 UTCJul 26, 02:35 UTC20h 30m
2026-07-24 CQH6565 PVG → KIX Jul 24, 20:55 UTCJul 25, 04:40 UTC7h 45m
2026-07-24 CQH6582 KIX → PVG Jul 24, 10:45 UTCJul 24, 19:35 UTC8h 50m
2026-07-24 CQH6576 KIX → PVG Jul 24, 03:30 UTCJul 24, 09:20 UTC5h 50m
2026-07-23 CQH6575 PVG → KIX Jul 23, 11:15 UTCJul 24, 02:05 UTC14h 50m
2026-07-23 CQH6576 KIX → PVG Jul 23, 03:30 UTCJul 23, 10:00 UTC6h 30m
2026-07-23 CQH6575 PVG → KIX Jul 23, 01:10 UTCJul 23, 02:10 UTC1h 0m
2026-07-21 CQH6565 PVG → KIX Jul 21, 21:10 UTCJul 22, 04:45 UTC7h 35m
2026-07-21 CQH6582 KIX → PVG Jul 21, 10:55 UTCJul 21, 19:45 UTC8h 50m
2026-07-21 CQH6581 PVG → KIX Jul 21, 03:25 UTCJul 21, 09:45 UTC6h 20m
2026-07-21 CQH6575 PVG → KIX Jul 21, 01:10 UTCJul 21, 02:10 UTC1h 0m
2026-07-20 CQH6566 KIX → PVG Jul 20, 06:00 UTCJul 21, 02:10 UTC20h 10m
2026-07-19 CQH6565 PVG → KIX Jul 19, 20:00 UTCJul 20, 04:40 UTC8h 40m
2026-07-19 CQH6582 - Jul 19, 10:40 UTCJul 19, 16:15 UTC5h 35m
2026-07-19 CQH6576 KIX → KIX Jul 19, 03:35 UTCJul 19, 09:20 UTC5h 45m
2026-07-19 CQH6575 PVG → KIX Jul 19, 01:15 UTCJul 19, 02:20 UTC1h 5m
2026-07-18 CQH6575 PVG → KIX Jul 18, 06:00 UTCJul 19, 02:20 UTC20h 20m
2026-07-17 CQH6565 - Jul 17, 20:00 UTCJul 18, 04:45 UTC8h 46m
2026-07-17 CQH8755 - Jul 17, 18:19 UTCJul 17, 18:29 UTC10m
2026-07-17 CQH6582 - Jul 17, 11:20 UTCJul 17, 16:44 UTC5h 25m
2026-07-17 CQH6581 - Jul 17, 09:04 UTCJul 17, 10:10 UTC1h 5m
2026-07-17 CQH6576 - Jul 17, 03:34 UTCJul 17, 04:35 UTC1h 0m
2026-07-16 CQH6575 PVG → KIX Jul 16, 07:20 UTCJul 17, 02:20 UTC19h 0m
2026-07-16 CQH6575 PVG → KIX Jul 16, 06:35 UTCJul 17, 02:20 UTC19h 45m
2026-07-15 CQH6565 - Jul 15, 20:00 UTCJul 16, 05:30 UTC9h 30m
2026-07-15 CQH8755 - Jul 15, 18:00 UTCJul 15, 18:10 UTC10m
2026-07-15 CQH6582 - Jul 15, 10:55 UTCJul 15, 16:40 UTC5h 45m
2026-07-15 CQH6576 - Jul 15, 04:15 UTCJul 15, 09:40 UTC5h 25m
2026-07-15 CQH6575 - Jul 15, 01:40 UTCJul 15, 02:40 UTC1h 0m
2026-07-14 CQH6566 KIX → KIX Jul 14, 06:05 UTCJul 15, 02:40 UTC20h 34m
2026-07-13 CQH6565 - Jul 13, 19:55 UTCJul 14, 04:50 UTC8h 55m
2026-07-13 CQH8755 - Jul 13, 17:50 UTCJul 13, 18:05 UTC15m
2026-07-13 CQH6582 - Jul 13, 10:30 UTCJul 13, 16:15 UTC5h 45m
2026-07-13 CQH6581 KIX → KIX Jul 13, 03:40 UTCJul 13, 09:15 UTC5h 35m
2026-07-12 CQH6582 - Jul 12, 12:10 UTCJul 13, 02:20 UTC14h 10m
2026-07-12 CQH658D - Jul 12, 05:35 UTCJul 12, 10:45 UTC5h 10m
2026-07-11 CQH6581 - Jul 11, 03:35 UTCJul 11, 09:15 UTC5h 40m
2026-07-11 CQH6575 - Jul 11, 01:00 UTCJul 11, 02:10 UTC1h 10m
2026-07-10 CQH6566 - Jul 10, 06:10 UTCJul 11, 01:15 UTC19h 5m
2026-07-09 CQH6565 - Jul 9, 20:40 UTCJul 10, 05:00 UTC8h 20m
2026-07-09 CQH6582 - Jul 9, 11:25 UTCJul 9, 19:15 UTC7h 50m
2026-07-09 CQH6581 KIX → KIX Jul 9, 03:50 UTCJul 9, 10:15 UTC6h 25m
2026-07-09 CQH6575 - Jul 9, 01:35 UTCJul 9, 02:45 UTC1h 10m
2026-07-08 CQH6575 KIX → KIX Jul 8, 06:00 UTCJul 9, 02:45 UTC20h 45m
2026-07-07 CQH6565 - Jul 7, 19:50 UTCJul 8, 04:45 UTC8h 55m
2026-07-07 CQH6582 KIX → BKK Jul 7, 10:30 UTCJul 7, 18:10 UTC7h 40m

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-321H page for operator, model, and routing details .

Mode-S 781A9D frequently asked

What is Mode-S code 781A9D?
781A9D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-321H.
Where is Mode-S 781A9D registered?
Mode-S code 781A9D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781A9D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781A9D, octal 36015235, decimal 7,871,133.
What flights does 781A9D operate?
Mode-S 781A9D has broadcast 20 distinct callsigns, including CQH6575, CQH6582, CQH6565, CQH6576, CQH6566.