Apparatus

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sensors Mode-S transponder

781B38

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-322P · AIRBUS A-321neo

Hex
781B38
Octal
36015470
Decimal
7,871,288
Country
CN
Tail
B-322P
Type
A21N
No current signal · last broadcast 3h ago
Flights observed
136
Distinct callsigns
20
Country
CN
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 781B38.

Country allocation

The ICAO 24-bit address 781B38 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
CQH8956 Spring Airlines 14 2026-07-17
CQH8882 - 14 2026-07-11
CQH8881 - 14 2026-07-11
CQH8955 Spring Airlines 13 2026-07-17
CQH8776 - 13 2026-07-04
CQH8950 - 11 2026-07-16
CQH8949 - 10 2026-07-16
CQH8775 - 8 2026-07-04
CQH8918 Spring Airlines 7 2026-06-11
CQH8917 Spring Airlines 4 2026-05-28
CQH6576 Spring Airlines 3 2026-06-08
CQH6223 - 3 2026-06-12
CQH8930 Spring Airlines 2 2026-06-01
CQH8836 Spring Airlines 2 2026-05-21
CQH6582 Spring Airlines 2 2026-06-08
CQH6575 Spring Airlines 2 2026-06-07
CQH6566 Spring Airlines 2 2026-06-09
CQH6565 Spring Airlines 2 2026-06-06
CQH8856 - 1 2026-07-14
CQH8835 - 1 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CQH8956 SZX → SHA Jul 17, 23:35 UTCJul 17, 23:45 UTC10m
2026-07-17 CQH8955 SHA → SZX Jul 17, 16:29 UTCJul 17, 16:44 UTC15m
2026-07-16 CQH8950 - Jul 16, 13:34 UTCJul 16, 13:45 UTC10m
2026-07-16 CQH8949 - Jul 16, 11:30 UTCJul 16, 12:09 UTC40m
2026-07-15 CQH6224 - Jul 15, 06:20 UTCJul 15, 06:40 UTC20m
2026-07-14 CQH8856 - Jul 14, 11:00 UTCJul 14, 11:15 UTC15m
2026-07-13 CQH8950 - Jul 13, 13:10 UTCJul 13, 13:20 UTC10m
2026-07-13 CQH8949 - Jul 13, 11:30 UTCJul 13, 11:50 UTC20m
2026-07-11 CQH8882 - Jul 11, 06:25 UTCJul 11, 06:40 UTC15m
2026-07-11 CQH8881 - Jul 11, 04:05 UTCJul 11, 04:55 UTC50m
2026-07-10 CQH8956 - Jul 10, 23:35 UTCJul 10, 23:50 UTC15m
2026-07-10 CQH8955 - Jul 10, 15:35 UTCJul 10, 15:45 UTC10m
2026-07-10 CQH6719 - Jul 10, 08:20 UTCJul 10, 08:35 UTC15m
2026-07-09 CQH8950 - Jul 9, 15:20 UTCJul 9, 15:30 UTC10m
2026-07-09 CQH8949 - Jul 9, 13:20 UTCJul 9, 14:05 UTC45m
2026-07-08 CQH8956 SZX → SHA Jul 8, 23:35 UTCJul 8, 23:45 UTC10m
2026-07-08 CQH8955 - Jul 8, 17:50 UTCJul 8, 18:20 UTC30m
2026-07-08 CQH7682 - Jul 8, 13:05 UTCJul 8, 13:15 UTC10m
2026-07-08 - - Jul 8, 00:15 UTCJul 8, 03:35 UTC3h 20m
2026-07-04 CQH8776 - Jul 4, 13:30 UTCJul 4, 13:40 UTC10m
2026-07-04 CQH8775 - Jul 4, 11:55 UTCJul 4, 12:10 UTC15m
2026-07-03 CQH8882 - Jul 3, 09:00 UTCJul 3, 09:10 UTC10m
2026-07-03 CQH8881 - Jul 3, 04:50 UTCJul 3, 05:05 UTC15m
2026-07-02 CQH8955 - Jul 2, 17:10 UTCJul 2, 18:10 UTC1h 0m
2026-07-02 CQH8776 - Jul 2, 10:40 UTCJul 2, 10:55 UTC15m
2026-07-02 CQH8775 - Jul 2, 08:05 UTCJul 2, 08:25 UTC20m
2026-07-02 CQH8835 - Jul 2, 01:15 UTCJul 2, 01:25 UTC10m
2026-07-01 CQH8950 - Jul 1, 14:35 UTCJul 1, 14:45 UTC10m
2026-07-01 CQH8882 - Jul 1, 08:00 UTCJul 1, 08:15 UTC15m
2026-07-01 CQH8881 - Jul 1, 05:10 UTCJul 1, 05:30 UTC20m
2026-06-30 CQH8956 SZX → SHA Jun 30, 23:30 UTCJun 30, 23:45 UTC15m
2026-06-30 CQH8955 - Jun 30, 16:25 UTCJun 30, 16:50 UTC25m
2026-06-29 CQH8882 - Jun 29, 06:24 UTCJun 29, 06:34 UTC10m
2026-06-29 CQH8881 - Jun 29, 04:39 UTCJun 29, 04:50 UTC10m
2026-06-28 CQH8956 SZX → SHA Jun 28, 23:34 UTCJun 28, 23:44 UTC10m
2026-06-28 CQH8949 - Jun 28, 13:00 UTCJun 28, 13:40 UTC40m
2026-06-27 CQH8776 - Jun 27, 09:55 UTCJun 27, 10:05 UTC10m
2026-06-27 CQH8775 - Jun 27, 08:25 UTCJun 27, 08:35 UTC10m
2026-06-25 CQH8950 - Jun 25, 16:29 UTCJun 25, 16:45 UTC15m
2026-06-23 CQH8882 - Jun 23, 06:29 UTCJun 23, 06:44 UTC15m
2026-06-23 CQH8881 - Jun 23, 04:35 UTCJun 23, 05:00 UTC25m
2026-06-22 CQH8956 SZX → SHA Jun 22, 23:29 UTCJun 22, 23:45 UTC15m
2026-06-22 CQH8955 - Jun 22, 16:14 UTCJun 22, 16:40 UTC25m
2026-06-22 CQH8776 - Jun 22, 11:44 UTCJun 22, 11:54 UTC10m
2026-06-22 CQH8775 - Jun 22, 08:40 UTCJun 22, 08:54 UTC15m
2026-06-19 CQH8950 - Jun 19, 13:50 UTCJun 19, 13:59 UTC10m
2026-06-19 CQH8882 - Jun 19, 07:19 UTCJun 19, 07:29 UTC10m
2026-06-19 CQH8881 - Jun 19, 05:09 UTCJun 19, 06:04 UTC55m
2026-06-18 CQH8949 - Jun 18, 16:35 UTCJun 18, 16:55 UTC20m
2026-06-18 CQH8882 - Jun 18, 10:30 UTCJun 18, 10:40 UTC10m

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-322P page for operator, model, and routing details .

Mode-S 781B38 frequently asked

What is Mode-S code 781B38?
781B38 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-322P.
Where is Mode-S 781B38 registered?
Mode-S code 781B38 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781B38 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781B38, octal 36015470, decimal 7,871,288.
What flights does 781B38 operate?
Mode-S 781B38 has broadcast 20 distinct callsigns, including CQH8956, CQH8882, CQH8881, CQH8955, CQH8776.