Apparatus

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sensors Mode-S transponder

781F5A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32E9 · AIRBUS A-321neo

Hex
781F5A
Octal
36017532
Decimal
7,872,346
Country
CN
Tail
B-32E9
Type
A21N
No current signal · last broadcast 7h ago
Flights observed
107
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 781F5A.

Country allocation

The ICAO 24-bit address 781F5A 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
CQH8955 Spring Airlines 11 2026-07-20
CQH8881 Spring Airlines 10 2026-07-20
CQH8956 Spring Airlines 9 2026-07-20
CQH8882 - 9 2026-07-21
CQH6566 - 7 2026-06-26
CQH8775 - 6 2026-07-11
CQH6576 - 6 2026-06-25
CQH6575 - 6 2026-06-25
CQH8918 - 5 2026-07-18
CQH8776 - 5 2026-07-11
CQH6582 - 5 2026-06-25
CQH8950 - 4 2026-07-03
CQH8949 - 4 2026-07-03
CQH8917 - 4 2026-07-18
CQH8929 Spring Airlines 3 2026-06-14
CQH8756 - 3 2026-06-25
CQH6565 Spring Airlines 3 2026-06-04
CQH6720 - 2 2026-07-16
CQH8930 Spring Airlines 1 2026-05-23
CQH8835 Spring Airlines 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 CQH8882 - Jul 21, 08:45 UTCJul 22, 00:25 UTC15h 40m
2026-07-20 CQH8956 SZX → SHA Jul 20, 23:35 UTCJul 21, 05:10 UTC5h 35m
2026-07-20 CQH8955 SHA → SZX Jul 20, 15:40 UTCJul 20, 16:05 UTC25m
2026-07-20 CQH8882 - Jul 20, 07:15 UTCJul 20, 07:30 UTC15m
2026-07-20 CQH8881 SHA → SZX Jul 20, 04:40 UTCJul 20, 04:50 UTC10m
2026-07-19 CQH8956 SZX → SHA Jul 19, 23:45 UTCJul 20, 00:00 UTC15m
2026-07-19 CQH8955 SHA → SZX Jul 19, 17:50 UTCJul 19, 18:15 UTC25m
2026-07-18 CQH8918 - Jul 18, 02:25 UTCJul 18, 02:35 UTC10m
2026-07-18 CQH8917 - Jul 18, 00:19 UTCJul 18, 00:45 UTC25m
2026-07-17 CQH8882 - Jul 17, 06:25 UTCJul 17, 06:35 UTC10m
2026-07-17 CQH8881 - Jul 17, 04:04 UTCJul 17, 04:49 UTC45m
2026-07-16 CQH8956 - Jul 16, 23:35 UTCJul 16, 23:49 UTC15m
2026-07-16 CQH8955 - Jul 16, 15:14 UTCJul 16, 15:55 UTC40m
2026-07-16 CQH6720 - Jul 16, 10:50 UTCJul 16, 10:59 UTC10m
2026-07-13 CQH8881 - Jul 13, 04:40 UTCJul 13, 05:05 UTC25m
2026-07-12 CQH8956 - Jul 12, 23:20 UTCJul 12, 23:35 UTC15m
2026-07-12 CQH8955 - Jul 12, 15:35 UTCJul 12, 16:05 UTC30m
2026-07-11 CQH8776 - Jul 11, 09:50 UTCJul 11, 10:05 UTC15m
2026-07-11 CQH8775 - Jul 11, 07:30 UTCJul 11, 08:25 UTC55m
2026-07-10 CQH8882 - Jul 10, 06:30 UTCJul 10, 06:40 UTC10m
2026-07-10 CQH8881 - Jul 10, 00:45 UTCJul 10, 04:55 UTC4h 10m
2026-07-09 CQH8956 - Jul 9, 23:25 UTCJul 9, 23:40 UTC15m
2026-07-09 CQH8955 - Jul 9, 17:50 UTCJul 9, 18:20 UTC30m
2026-07-03 CQH8950 - Jul 3, 15:35 UTCJul 3, 15:45 UTC10m
2026-07-03 CQH8949 - Jul 3, 14:20 UTCJul 3, 14:30 UTC10m
2026-07-02 CQH8882 - Jul 2, 08:35 UTCJul 2, 08:45 UTC10m
2026-07-02 CQH8881 - Jul 2, 07:05 UTCJul 2, 07:15 UTC10m
2026-07-01 CQH8956 SZX → SHA Jul 1, 23:20 UTCJul 1, 23:30 UTC10m
2026-07-01 CQH8955 - Jul 1, 16:00 UTCJul 1, 16:20 UTC20m
2026-07-01 CQH8776 - Jul 1, 10:30 UTCJul 1, 10:45 UTC15m
2026-07-01 CQH8775 - Jul 1, 09:05 UTCJul 1, 09:15 UTC10m
2026-06-29 CQH8776 - Jun 29, 10:04 UTCJun 29, 10:15 UTC10m
2026-06-29 CQH8775 - Jun 29, 07:55 UTCJun 29, 08:14 UTC20m
2026-06-29 - - Jun 29, 01:10 UTCJun 29, 01:25 UTC15m
2026-06-26 CQH7682 - Jun 26, 14:09 UTCJun 27, 02:50 UTC12h 40m
2026-06-26 CQH6566 - Jun 26, 06:45 UTCJun 27, 02:50 UTC20h 5m
2026-06-25 CQH8756 - Jun 25, 19:54 UTCJun 26, 04:24 UTC8h 30m
2026-06-25 CQH6582 - Jun 25, 10:55 UTCJun 25, 18:24 UTC7h 30m
2026-06-25 CQH6576 KIX → KIX Jun 25, 03:20 UTCJun 25, 09:34 UTC6h 15m
2026-06-25 CQH6575 - Jun 25, 01:09 UTCJun 25, 02:05 UTC55m
2026-06-24 CQH6575 - Jun 24, 05:54 UTCJun 25, 02:05 UTC20h 10m
2026-06-23 CQH8918 - Jun 23, 02:29 UTCJun 23, 02:45 UTC15m
2026-06-20 CQH8882 - Jun 20, 06:35 UTCJun 20, 06:45 UTC10m
2026-06-20 CQH8881 - Jun 20, 04:34 UTCJun 20, 04:49 UTC15m
2026-06-19 CQH8955 - Jun 19, 17:19 UTCJun 19, 17:44 UTC25m
2026-06-19 CQH6566 - Jun 19, 06:10 UTCJun 19, 07:09 UTC1h 0m
2026-06-18 CQH8756 - Jun 18, 20:00 UTCJun 19, 04:34 UTC8h 34m
2026-06-18 CQH6582 KIX → BKK Jun 18, 10:30 UTCJun 18, 18:20 UTC7h 50m
2026-06-18 CQH6576 KIX → KIX Jun 18, 03:25 UTCJun 18, 09:10 UTC5h 45m
2026-06-17 CQH6575 - Jun 17, 06:35 UTCJun 18, 02:15 UTC19h 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-32E9 page for operator, model, and routing details .

Mode-S 781F5A frequently asked

What is Mode-S code 781F5A?
781F5A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32E9.
Where is Mode-S 781F5A registered?
Mode-S code 781F5A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781F5A broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781F5A, octal 36017532, decimal 7,872,346.
What flights does 781F5A operate?
Mode-S 781F5A has broadcast 20 distinct callsigns, including CQH8955, CQH8881, CQH8956, CQH8882, CQH6566.