Apparatus

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sensors Mode-S transponder

781C0A

ICAO 24-bit transponder address · allocated to China

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

Hex
781C0A
Octal
36016012
Decimal
7,871,498
Country
CN
Tail
B-325C
Type
A20N
No current signal · last broadcast Jul 26, 14:35 UTC
Flights observed
106
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 14:35 UTC

Last known position

Most recent position reported by Mode-S 781C0A.

Country allocation

The ICAO 24-bit address 781C0A 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
CQH8597 Spring Airlines 6 2026-07-24
CQH8779 - 5 2026-07-18
CQH8598 Spring Airlines 4 2026-07-24
CQH8934 - 3 2026-07-06
CQH8664 Spring Airlines 3 2026-07-26
CQH8593 - 3 2026-07-20
CQH8522 - 3 2026-06-24
CQH6516 Spring Airlines 3 2026-07-18
CQH6515 Spring Airlines 3 2026-07-18
CQH8952 Spring Airlines 2 2026-07-21
CQH8951 Spring Airlines 2 2026-07-21
CQH8892 Spring Airlines 2 2026-07-23
CQH8891 - 2 2026-07-23
CQH8860 Spring Airlines 2 2026-06-03
CQH8755 Spring Airlines 2 2026-04-23
CQH8671 Spring Airlines 2 2026-06-02
CQH8666 - 2 2026-07-16
CQH8594 - 2 2026-07-20
CQH7588 Spring Airlines 2 2026-06-21
CQH7587 Spring Airlines 2 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CQH8664 HKT → PVG Jul 26, 06:50 UTCJul 26, 14:35 UTC7h 45m
2026-07-24 CQH8598 HKG → PVG Jul 24, 08:45 UTCJul 24, 13:25 UTC4h 40m
2026-07-24 CQH8597 PVG → HKG Jul 24, 03:25 UTCJul 24, 06:50 UTC3h 25m
2026-07-23 CQH8597 PVG → HKG Jul 23, 06:35 UTCJul 24, 06:30 UTC23h 55m
2026-07-23 CQH8892 BKK → PVG Jul 23, 06:05 UTCJul 24, 03:35 UTC21h 30m
2026-07-23 CQH8891 - Jul 23, 02:15 UTCJul 23, 04:25 UTC2h 10m
2026-07-21 CQH8952 TPE → PVG Jul 21, 04:40 UTCJul 21, 05:00 UTC20m
2026-07-21 CQH8951 PVG → TPE Jul 21, 03:05 UTCJul 21, 03:25 UTC20m
2026-07-20 CQH8594 - Jul 20, 19:30 UTCJul 20, 22:05 UTC2h 35m
2026-07-20 CQH8593 - Jul 20, 18:05 UTCJul 20, 18:20 UTC15m
2026-07-20 CQH8593 - Jul 20, 15:10 UTCJul 20, 16:15 UTC1h 5m
2026-07-18 CQH8779 - Jul 18, 19:10 UTCJul 19, 05:25 UTC10h 15m
2026-07-18 CQH6516 KUL → PVG Jul 18, 15:55 UTCJul 18, 16:15 UTC20m
2026-07-18 CQH6515 PVG → KUL Jul 18, 14:20 UTCJul 18, 14:35 UTC15m
2026-07-18 CQH6515 PVG → KUL Jul 18, 06:30 UTCJul 18, 11:30 UTC5h 0m
2026-07-17 CQH8594 - Jul 17, 20:20 UTCJul 18, 05:05 UTC8h 46m
2026-07-17 CQH8593 TPE → BKI Jul 17, 03:45 UTCJul 17, 19:05 UTC15h 20m
2026-07-16 CQH8666 - Jul 16, 07:05 UTCJul 17, 02:30 UTC19h 25m
2026-07-15 CQH8666 - Jul 15, 13:30 UTCJul 16, 10:20 UTC20h 50m
2026-07-14 CQH6873 - Jul 14, 08:50 UTCJul 14, 09:00 UTC10m
2026-07-13 CQH8753 - Jul 13, 22:45 UTCJul 13, 23:00 UTC15m
2026-07-13 CQH8672 - Jul 13, 11:30 UTCJul 13, 11:45 UTC15m
2026-07-11 CQH7552 - Jul 11, 02:35 UTCJul 11, 03:15 UTC40m
2026-07-10 CQH7286 - Jul 10, 02:00 UTCJul 10, 04:10 UTC2h 10m
2026-07-09 CQH7419 - Jul 9, 22:40 UTCJul 10, 00:50 UTC2h 10m
2026-07-09 CQH7348 - Jul 9, 15:30 UTCJul 9, 15:50 UTC20m
2026-07-09 CQH7347 - Jul 9, 10:05 UTCJul 9, 10:15 UTC10m
2026-07-09 CQH6922 - Jul 9, 05:35 UTCJul 9, 05:50 UTC15m
2026-07-09 CQH6922 - Jul 9, 02:25 UTCJul 9, 02:40 UTC15m
2026-07-09 CQH6921 - Jul 9, 00:40 UTCJul 9, 00:55 UTC15m
2026-07-08 CQH6921 - Jul 8, 21:45 UTCJul 8, 21:55 UTC10m
2026-07-07 CQH7348 - Jul 7, 14:20 UTCJul 7, 14:35 UTC15m
2026-07-06 CQH8934 - Jul 6, 14:45 UTCJul 6, 16:00 UTC1h 15m
2026-07-06 CQH8779 - Jul 6, 00:20 UTCJul 6, 13:20 UTC13h 0m
2026-07-05 CQH8779 - Jul 5, 12:35 UTCJul 6, 12:25 UTC23h 50m
2026-07-05 CQH8664 - Jul 5, 11:30 UTCJul 6, 05:20 UTC17h 50m
2026-07-05 CQH8664 - Jul 5, 08:35 UTCJul 6, 05:20 UTC20h 45m
2026-07-05 CQH8663 - Jul 5, 06:55 UTCJul 6, 05:20 UTC22h 25m
2026-07-02 CQH8936 - Jul 2, 12:20 UTCJul 2, 13:00 UTC40m
2026-06-29 CQH6887 - Jun 29, 15:09 UTCJun 29, 15:19 UTC10m
2026-06-27 CQH6294 - Jun 27, 20:09 UTCJun 27, 21:29 UTC1h 20m
2026-06-27 CQH6293 - Jun 27, 16:04 UTCJun 27, 17:20 UTC1h 15m
2026-06-26 CQH6341 SHE → HFE Jun 26, 04:10 UTCJun 26, 04:24 UTC15m
2026-06-24 CQH8522 - Jun 24, 13:00 UTCJun 25, 07:54 UTC18h 55m
2026-06-21 CQH7588 CJU → SHE Jun 21, 02:55 UTCJun 21, 03:30 UTC35m
2026-06-20 CQH7587 SHE → CJU Jun 20, 23:59 UTCJun 21, 00:45 UTC45m
2026-06-20 CQH7588 CJU → SHE Jun 20, 02:59 UTCJun 21, 00:45 UTC21h 45m
2026-06-19 CQH7587 SHE → CJU Jun 19, 10:24 UTCJun 20, 00:54 UTC14h 30m
2026-06-19 CQH7502 - Jun 19, 04:50 UTCJun 20, 00:54 UTC20h 5m
2026-06-19 CQH7501 - Jun 19, 02:19 UTCJun 19, 02:50 UTC30m

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-325C page for operator, model, and routing details .

Mode-S 781C0A frequently asked

What is Mode-S code 781C0A?
781C0A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-325C.
Where is Mode-S 781C0A registered?
Mode-S code 781C0A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C0A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C0A, octal 36016012, decimal 7,871,498.
What flights does 781C0A operate?
Mode-S 781C0A has broadcast 20 distinct callsigns, including CQH8597, CQH8779, CQH8598, CQH8934, CQH8664.