Apparatus

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sensors Mode-S transponder

781D05

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-327Z · AIRBUS A-320neo

Hex
781D05
Octal
36016405
Decimal
7,871,749
Country
CN
Tail
B-327Z
Type
A20N
No current signal · last broadcast Jul 26, 20:55 UTC
Flights observed
151
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 20:55 UTC

Last known position

Most recent position reported by Mode-S 781D05.

Country allocation

The ICAO 24-bit address 781D05 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
CQH6523 - 32 2026-07-19
CQH8597 - 18 2026-07-13
CQH8666 Spring Airlines 12 2026-07-21
CQH8665 Spring Airlines 11 2026-07-25
CQH6524 - 11 2026-07-19
CQH7259 - 7 2026-06-23
CQH8598 - 5 2026-07-13
CQH8593 Spring Airlines 4 2026-07-25
CQH8792 - 3 2026-06-20
CQH8791 - 3 2026-06-19
CQH8594 Spring Airlines 3 2026-07-26
CQH8533 - 2 2026-05-20
CQH7496 Spring Airlines 2 2026-05-21
CQH7057 Spring Airlines 2 2026-06-04
CQH7008 Spring Airlines 2 2026-05-20
CQH6922 Spring Airlines 2 2026-04-26
CQH6921 Spring Airlines 2 2026-04-26
CQH8952 - 1 2026-07-05
CQH8951 - 1 2026-07-04
CQH8934 Spring Airlines 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CQH8594 BKI → PVG Jul 26, 20:20 UTCJul 26, 20:55 UTC35m
2026-07-25 CQH8593 PVG → BKI Jul 25, 22:40 UTCJul 26, 19:10 UTC20h 31m
2026-07-25 CQH8551 PVG → SIN Jul 25, 20:45 UTCJul 25, 20:55 UTC10m
2026-07-25 CQH8665 PVG → HKT Jul 25, 02:00 UTCJul 25, 17:40 UTC15h 40m
2026-07-22 CQH8594 - Jul 22, 00:45 UTCJul 22, 03:15 UTC2h 30m
2026-07-21 CQH8593 - Jul 21, 23:05 UTCJul 21, 23:25 UTC20m
2026-07-21 CQH8666 HKT → PVG Jul 21, 02:05 UTCJul 21, 21:15 UTC19h 10m
2026-07-20 CQH8666 HKT → PVG Jul 20, 16:00 UTCJul 21, 10:55 UTC18h 55m
2026-07-20 CQH6515 PVG → KUL Jul 20, 04:15 UTCJul 20, 13:55 UTC9h 40m
2026-07-19 CQH6524 - Jul 19, 12:40 UTCJul 20, 01:35 UTC12h 55m
2026-07-19 CQH6523 - Jul 19, 11:00 UTCJul 19, 11:15 UTC15m
2026-07-18 CQH8594 - Jul 18, 23:20 UTCJul 19, 08:05 UTC8h 45m
2026-07-18 CQH8593 - Jul 18, 05:00 UTCJul 18, 22:10 UTC17h 10m
2026-07-18 CQH8593 - Jul 18, 03:10 UTCJul 18, 22:10 UTC19h 0m
2026-07-17 CQH8665 PVG → HKT Jul 17, 13:35 UTCJul 18, 08:25 UTC18h 51m
2026-07-17 CQH6899 - Jul 17, 12:04 UTCJul 17, 12:40 UTC35m
2026-07-17 CQH8602 NGO → PVG Jul 17, 07:00 UTCJul 17, 08:04 UTC1h 5m
2026-07-17 CQH8601 PVG → NGO Jul 17, 04:35 UTCJul 17, 05:39 UTC1h 5m
2026-07-15 CQH6524 - Jul 15, 10:50 UTCJul 15, 15:00 UTC4h 10m
2026-07-15 CQH6523 - Jul 15, 09:15 UTCJul 15, 09:35 UTC20m
2026-07-15 CQH6523 - Jul 15, 05:30 UTCJul 15, 06:30 UTC1h 0m
2026-07-13 CQH8598 - Jul 13, 08:45 UTCJul 13, 12:55 UTC4h 10m
2026-07-13 CQH8597 - Jul 13, 03:25 UTCJul 13, 06:40 UTC3h 15m
2026-07-10 CQH6524 - Jul 10, 13:45 UTCJul 10, 17:50 UTC4h 5m
2026-07-10 CQH6523 - Jul 10, 12:05 UTCJul 10, 12:25 UTC20m
2026-07-10 CQH7050 - Jul 10, 04:30 UTCJul 10, 08:55 UTC4h 25m
2026-07-09 CQH8666 - Jul 9, 07:20 UTCJul 10, 03:15 UTC19h 55m
2026-07-09 CQH8665 - Jul 9, 07:10 UTCJul 10, 03:15 UTC20h 5m
2026-07-08 CQH8665 - Jul 8, 11:20 UTCJul 9, 09:50 UTC22h 30m
2026-07-08 CQH8666 - Jul 8, 09:20 UTCJul 9, 09:15 UTC23h 55m
2026-07-08 CQH8666 - Jul 8, 03:55 UTCJul 8, 13:10 UTC9h 15m
2026-07-06 CQH8665 - Jul 6, 03:45 UTCJul 6, 11:55 UTC8h 10m
2026-07-05 CQH8952 - Jul 5, 03:30 UTCJul 5, 04:10 UTC40m
2026-07-04 CQH8951 - Jul 4, 10:10 UTCJul 5, 02:15 UTC16h 5m
2026-07-04 CQH8597 - Jul 4, 05:00 UTCJul 4, 08:35 UTC3h 35m
2026-07-03 CQH8597 - Jul 3, 13:05 UTCJul 4, 08:35 UTC19h 30m
2026-07-03 CQH8597 - Jul 3, 09:20 UTCJul 4, 08:35 UTC23h 15m
2026-07-02 CQH8597 - Jul 2, 14:00 UTCJul 3, 07:50 UTC17h 50m
2026-07-02 CQH8597 - Jul 2, 10:40 UTCJul 3, 07:50 UTC21h 10m
2026-07-02 CQH6523 - Jul 2, 08:40 UTCJul 2, 08:55 UTC15m
2026-07-01 CQH6523 - Jul 1, 14:45 UTCJul 2, 05:50 UTC15h 5m
2026-07-01 CQH6524 - Jul 1, 10:40 UTCJul 2, 05:50 UTC19h 10m
2026-07-01 CQH6523 - Jul 1, 08:40 UTCJul 1, 09:05 UTC25m
2026-07-01 CQH6523 - Jul 1, 04:50 UTCJul 1, 05:20 UTC30m
2026-06-30 CQH6523 - Jun 30, 09:50 UTCJul 1, 05:20 UTC19h 30m
2026-06-30 CQH8666 - Jun 30, 07:20 UTCJul 1, 05:20 UTC22h 0m
2026-06-30 CQH8666 - Jun 30, 07:10 UTCJul 1, 05:15 UTC22h 5m
2026-06-30 CQH8665 - Jun 30, 01:40 UTCJun 30, 09:50 UTC8h 10m
2026-06-29 CQH8665 - Jun 29, 13:00 UTCJun 30, 09:50 UTC20h 51m
2026-06-29 CQH8665 - Jun 29, 09:20 UTCJun 30, 09:05 UTC23h 46m

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-327Z page for operator, model, and routing details .

Mode-S 781D05 frequently asked

What is Mode-S code 781D05?
781D05 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-327Z.
Where is Mode-S 781D05 registered?
Mode-S code 781D05 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781D05 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781D05, octal 36016405, decimal 7,871,749.
What flights does 781D05 operate?
Mode-S 781D05 has broadcast 20 distinct callsigns, including CQH6523, CQH8597, CQH8666, CQH8665, CQH6524.