Apparatus

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sensors Mode-S transponder

781938

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-30EY · AIRBUS A-321neo

Hex
781938
Octal
36014470
Decimal
7,870,776
Country
CN
Tail
B-30EY
Type
A21N
No current signal · last broadcast 8h ago
Flights observed
55
Distinct callsigns
20
Country
CN
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 781938.

Country allocation

The ICAO 24-bit address 781938 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
CSN6762 China Southern Airlines 4 2026-05-02
CSN6758 China Southern Airlines 4 2026-05-11
CSN6670 China Southern Airlines 4 2026-05-28
CSN6148 China Southern Airlines 4 2026-05-27
CSN6782 China Southern Airlines 3 2026-05-24
CSN6757 China Southern Airlines 3 2026-04-20
CSN6754 China Southern Airlines 3 2026-04-26
CSN8481 China Southern Airlines 2 2026-04-28
CSN6736 China Southern Airlines 2 2026-06-01
CSN6712 China Southern Airlines 2 2026-05-29
CSN6630 China Southern Airlines 2 2026-05-30
CSN8482 China Southern Airlines 1 2026-04-29
CSN8276 China Southern Airlines 1 2026-06-01
CSN6780 China Southern Airlines 1 2026-04-24
CSN6743 China Southern Airlines 1 2026-05-20
CSN6711 China Southern Airlines 1 2026-05-31
CSN6669 China Southern Airlines 1 2026-05-27
CSN6668 China Southern Airlines 1 2026-05-03
CSN6629 China Southern Airlines 1 2026-05-29
CSN6624 China Southern Airlines 1 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CSN6147 SYX → HRB Jun 2, 02:45 UTCJun 2, 13:00 UTC10h 15m
2026-06-01 CSN6736 CAN → SYX Jun 1, 15:05 UTCJun 2, 13:00 UTC21h 55m
2026-06-01 CSN8276 WUH → SYX Jun 1, 02:25 UTCJun 1, 10:30 UTC8h 5m
2026-05-31 CSN6711 SYX → PKX May 31, 00:30 UTCMay 31, 00:40 UTC10m
2026-05-30 CSN6630 CGQ → HGH May 30, 03:20 UTCMay 30, 13:00 UTC9h 40m
2026-05-29 CSN6629 SYX → HGH May 29, 10:45 UTCMay 30, 07:30 UTC20h 46m
2026-05-29 CSN6712 PKX → SYX May 29, 08:05 UTCMay 29, 08:20 UTC15m
2026-05-28 CSN6712 PKX → SYX May 28, 11:35 UTCMay 29, 08:20 UTC20h 45m
2026-05-28 CSN6670 CGQ → SYX May 28, 01:50 UTCMay 28, 11:40 UTC9h 50m
2026-05-27 CSN6670 CGQ → SYX May 27, 12:45 UTCMay 28, 11:40 UTC22h 55m
2026-05-27 CSN6669 SYX → CGQ May 27, 10:05 UTCMay 28, 08:55 UTC22h 50m
2026-05-27 CSN6148 HRB → SYX May 27, 09:40 UTCMay 28, 04:35 UTC18h 55m
2026-05-27 CSN6148 HRB → SYX May 27, 05:24 UTCMay 28, 01:55 UTC20h 30m
2026-05-24 CSN6782 PVG → SYX May 24, 16:15 UTCMay 25, 12:00 UTC19h 45m
2026-05-24 CSN6782 PVG → SYX May 24, 15:20 UTCMay 25, 12:00 UTC20h 40m
2026-05-24 CSN6782 PVG → SYX May 24, 10:10 UTCMay 25, 05:50 UTC19h 40m
2026-05-21 CSN6630 CGQ → HGH May 21, 07:20 UTCMay 21, 12:30 UTC5h 10m
2026-05-20 CSN6743 SYX → CAN May 20, 08:45 UTCMay 20, 08:55 UTC10m
2026-05-18 CSN3836 PVG → SYX May 18, 05:50 UTCMay 18, 10:45 UTC4h 55m
2026-05-18 CSN3978 SZX → SYX May 18, 01:35 UTCMay 18, 01:50 UTC15m
2026-05-17 CSN6624 NKG → SYX May 17, 05:45 UTCMay 17, 06:05 UTC20m
2026-05-16 CSN6623 SYX → NKG May 16, 09:40 UTCMay 17, 06:05 UTC20h 25m
2026-05-11 CSN6758 SZX → SYX May 11, 15:30 UTCMay 11, 15:45 UTC15m
2026-05-09 CSN6670 CGQ → SYX May 9, 04:30 UTCMay 9, 09:25 UTC4h 55m
2026-05-07 CSN6148 HRB → SYX May 7, 05:25 UTCMay 7, 10:05 UTC4h 40m
2026-05-05 CSN6670 CGQ → SYX May 5, 04:35 UTCMay 5, 08:50 UTC4h 15m
2026-05-03 CSN6668 NKG → SYX May 3, 07:50 UTCMay 3, 12:50 UTC5h 0m
2026-05-02 CSN6762 SHE → SYX May 2, 08:05 UTCMay 3, 07:50 UTC23h 44m
2026-05-02 CSN6762 SHE → SYX May 2, 04:15 UTCMay 2, 08:30 UTC4h 15m
2026-04-29 CSN8482 DPS → CAN Apr 29, 05:00 UTCApr 29, 05:15 UTC15m
2026-04-28 CSN8481 CAN → DPS Apr 28, 21:05 UTCApr 29, 03:04 UTC6h 0m
2026-04-28 CSN8481 CAN → DPS Apr 28, 18:55 UTCApr 28, 19:05 UTC10m
2026-04-27 CSN6758 SZX → SYX Apr 27, 15:40 UTCApr 28, 08:50 UTC17h 10m
2026-04-27 CSN6762 SHE → SYX Apr 27, 04:30 UTCApr 27, 08:15 UTC3h 45m
2026-04-26 CSN6754 PVG → SYX Apr 26, 06:45 UTCApr 27, 04:30 UTC21h 45m
2026-04-26 CSN6754 PVG → SYX Apr 26, 00:55 UTCApr 26, 07:00 UTC6h 5m
2026-04-25 CSN6754 PVG → SYX Apr 25, 08:50 UTCApr 26, 07:00 UTC22h 10m
2026-04-24 CSN6780 CAN → HAK Apr 24, 15:05 UTCApr 25, 08:50 UTC17h 45m
2026-04-22 CSN6736 CAN → SYX Apr 22, 15:45 UTCApr 22, 15:55 UTC10m
2026-04-21 CSN6148 HRB → SYX Apr 21, 05:35 UTCApr 21, 10:15 UTC4h 40m
2026-04-20 CSN6758 SZX → SYX Apr 20, 15:40 UTCApr 21, 10:15 UTC18h 35m
2026-04-20 CSN6757 SYX → SZX Apr 20, 13:55 UTCApr 20, 14:05 UTC10m
2026-04-19 CSN6762 SHE → SYX Apr 19, 15:30 UTCApr 20, 08:25 UTC16h 55m
2026-04-19 CSN3210 WUX → SZX Apr 19, 13:15 UTCApr 19, 13:35 UTC20m
2026-04-19 CSN3209 SZX → WUX Apr 19, 08:05 UTCApr 19, 08:15 UTC10m
2026-04-19 CSN6592 NGB → SZX Apr 19, 06:00 UTCApr 19, 06:25 UTC25m
2026-04-19 CSN6591 SZX → NGB Apr 19, 01:15 UTCApr 19, 01:25 UTC10m
2026-04-18 CSN3634 HRB → SZX Apr 18, 14:20 UTCApr 18, 14:30 UTC10m
2026-04-18 CSN3633 SZX → HRB Apr 18, 04:25 UTCApr 18, 04:35 UTC10m
2026-04-18 CSN3366 HGH → SZX Apr 18, 02:30 UTCApr 18, 02:40 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-30EY page for operator, model, and routing details .

Mode-S 781938 frequently asked

What is Mode-S code 781938?
781938 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-30EY.
Where is Mode-S 781938 registered?
Mode-S code 781938 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781938 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781938, octal 36014470, decimal 7,870,776.
What flights does 781938 operate?
Mode-S 781938 has broadcast 20 distinct callsigns, including CSN6762, CSN6758, CSN6670, CSN6148, CSN6782.