Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 18h ago
Flights observed
101
Distinct callsigns
20
Country
CN
Last broadcast
18h 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
CSN6148 China Southern Airlines 7 2026-06-03
CSN6754 China Southern Airlines 6 2026-06-04
CSN6190 China Southern Airlines 6 2026-06-12
CSN6782 China Southern Airlines 5 2026-06-05
CSN6712 China Southern Airlines 5 2026-06-17
CSN6935 - 4 2026-06-15
CSN6762 China Southern Airlines 4 2026-05-02
CSN6758 China Southern Airlines 4 2026-05-11
CSN6670 China Southern Airlines 4 2026-05-28
CSN8920 - 3 2026-07-17
CSN6757 China Southern Airlines 3 2026-04-20
CSN6630 - 3 2026-07-08
CSN3516 - 3 2026-06-18
CSN8481 China Southern Airlines 2 2026-04-28
CSN6753 China Southern Airlines 2 2026-06-08
CSN6736 China Southern Airlines 2 2026-06-01
CSN6718 China Southern Airlines 2 2026-06-08
CSN6668 - 2 2026-07-07
CSN6624 - 2 2026-07-15
CSN6189 China Southern Airlines 2 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CSN8920 - Jul 17, 06:05 UTCJul 17, 06:25 UTC20m
2026-07-15 CSN6624 - Jul 15, 05:45 UTCJul 15, 06:00 UTC15m
2026-07-12 CSN6147 - Jul 12, 05:20 UTCJul 12, 09:50 UTC4h 30m
2026-07-08 CSN6630 - Jul 8, 07:15 UTCJul 8, 12:55 UTC5h 40m
2026-07-07 CSN6668 - Jul 7, 12:20 UTCJul 8, 07:15 UTC18h 55m
2026-07-06 CSN6667 - Jul 6, 18:45 UTCJul 7, 12:35 UTC17h 50m
2026-07-06 CSN6347 - Jul 6, 04:35 UTCJul 6, 04:50 UTC15m
2026-06-20 CSN6102 - Jun 20, 13:44 UTCJun 20, 13:55 UTC10m
2026-06-19 CSN6794 CAN → HAK Jun 19, 15:54 UTCJun 19, 16:09 UTC15m
2026-06-18 CSN3516 - Jun 18, 14:40 UTCJun 19, 06:54 UTC16h 14m
2026-06-18 CSN6715 SYX → PKX Jun 18, 03:45 UTCJun 18, 14:50 UTC11h 5m
2026-06-17 CSN6717 SYX → PKX Jun 17, 10:25 UTCJun 18, 07:00 UTC20h 35m
2026-06-17 CSN6712 PKX → SYX Jun 17, 08:05 UTCJun 17, 08:25 UTC20m
2026-06-15 CSN6935 - Jun 15, 13:25 UTCJun 16, 06:35 UTC17h 10m
2026-06-15 CSN6935 - Jun 15, 08:04 UTCJun 16, 06:35 UTC22h 30m
2026-06-15 CSN6935 - Jun 15, 00:49 UTCJun 15, 13:54 UTC13h 5m
2026-06-14 CSN6935 - Jun 14, 14:25 UTCJun 15, 13:54 UTC23h 29m
2026-06-13 CSN8920 XIY → SYX Jun 13, 06:05 UTCJun 14, 05:45 UTC23h 41m
2026-06-13 CSN8920 XIY → SYX Jun 13, 00:05 UTCJun 13, 08:45 UTC8h 39m
2026-06-12 CSN6190 TFU → SYX Jun 12, 12:15 UTCJun 13, 08:45 UTC20h 29m
2026-06-12 CSN6189 SYX → TFU Jun 12, 06:55 UTCJun 13, 06:00 UTC23h 4m
2026-06-12 CSN6228 CKG → SYX Jun 12, 00:15 UTCJun 12, 04:50 UTC4h 36m
2026-06-11 CSN6712 PKX → SYX Jun 11, 00:35 UTCJun 11, 08:15 UTC7h 40m
2026-06-10 CSN6190 TFU → SYX Jun 10, 12:15 UTCJun 11, 08:15 UTC20h 0m
2026-06-10 CSN6190 TFU → SYX Jun 10, 07:30 UTCJun 11, 00:35 UTC17h 5m
2026-06-10 CSN6190 TFU → SYX Jun 10, 04:05 UTCJun 11, 00:35 UTC20h 30m
2026-06-10 CSN6190 TFU → SYX Jun 10, 00:05 UTCJun 10, 12:45 UTC12h 40m
2026-06-09 CSN3516 PVG → HAK Jun 9, 06:35 UTCJun 10, 00:10 UTC17h 35m
2026-06-08 CSN3516 PVG → HAK Jun 8, 12:05 UTCJun 9, 06:55 UTC18h 50m
2026-06-08 CSN6753 SYX → PVG Jun 8, 06:40 UTCJun 9, 01:10 UTC18h 30m
2026-06-08 CSN6753 SYX → PVG Jun 8, 04:05 UTCJun 9, 01:10 UTC21h 5m
2026-06-08 CSN6718 PKX → SYX Jun 8, 03:45 UTCJun 9, 01:10 UTC21h 25m
2026-06-07 CSN6718 PKX → SYX Jun 7, 10:45 UTCJun 8, 07:00 UTC20h 15m
2026-06-07 CSN6712 PKX → SYX Jun 7, 00:49 UTCJun 7, 08:35 UTC7h 45m
2026-06-06 CSN6190 TFU → SYX Jun 6, 12:20 UTCJun 7, 08:35 UTC20h 15m
2026-06-06 CSN6189 SYX → TFU Jun 6, 07:00 UTCJun 7, 00:49 UTC17h 50m
2026-06-05 CSN6782 PVG → SYX Jun 5, 14:25 UTCJun 6, 04:50 UTC14h 25m
2026-06-05 CSN6782 PVG → SYX Jun 5, 08:40 UTCJun 6, 04:50 UTC20h 10m
2026-06-04 CSN5786 WUH → SYX Jun 4, 14:40 UTCJun 5, 09:25 UTC18h 45m
2026-06-04 CSN5786 WUH → SYX Jun 4, 10:05 UTCJun 5, 09:25 UTC23h 20m
2026-06-04 CSN6754 PVG → SYX Jun 4, 00:30 UTCJun 4, 15:00 UTC14h 30m
2026-06-03 CSN6754 PVG → SYX Jun 3, 12:40 UTCJun 4, 10:05 UTC21h 25m
2026-06-03 CSN6754 PVG → SYX Jun 3, 09:35 UTCJun 4, 07:05 UTC21h 30m
2026-06-03 CSN6148 HRB → SYX Jun 3, 05:15 UTCJun 4, 01:10 UTC19h 55m
2026-06-03 CSN6148 HRB → SYX Jun 3, 02:40 UTCJun 4, 01:10 UTC22h 30m
2026-06-02 CSN6148 HRB → SYX Jun 2, 12:35 UTCJun 3, 10:00 UTC21h 25m
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

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 18h 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 CSN6148, CSN6754, CSN6190, CSN6782, CSN6712.