Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781690

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-308D · AIRBUS A-321neo

Hex
781690
Octal
36013220
Decimal
7,870,096
Country
CN
Tail
B-308D
Type
A21N
No current signal · last broadcast 16h ago
Flights observed
45
Distinct callsigns
20
Country
CN
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 781690.

Country allocation

The ICAO 24-bit address 781690 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
CSN5974 China Southern Airlines 6 2026-05-29
CSN6259 China Southern Airlines 4 2026-05-28
CSN3744 China Southern Airlines 3 2026-05-16
CSN8640 China Southern Airlines 2 2026-05-08
CSN8639 China Southern Airlines 2 2026-05-02
CSN6346 China Southern Airlines 2 2026-05-06
CSN6251 China Southern Airlines 2 2026-05-23
CSN6141 China Southern Airlines 2 2026-05-28
CSN6086 China Southern Airlines 2 2026-05-17
CSN6085 China Southern Airlines 2 2026-05-17
CSN5973 China Southern Airlines 2 2026-05-28
CSN5824 China Southern Airlines 2 2026-04-20
CSN6257 China Southern Airlines 1 2026-05-26
CSN6256 China Southern Airlines 1 2026-05-09
CSN6248 China Southern Airlines 1 2026-05-06
CSN6202 China Southern Airlines 1 2026-04-27
CSN5983 China Southern Airlines 1 2026-04-24
CSN5970 China Southern Airlines 1 2026-05-04
CSN5919 China Southern Airlines 1 2026-04-30
CSN5300 China Southern Airlines 1 2026-04-24

Recent flights last 45

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSN5974 CSX → HRB May 29, 01:55 UTCMay 29, 13:20 UTC11h 25m
2026-05-28 CSN5973 HRB → CSX May 28, 10:05 UTCMay 29, 02:05 UTC16h 0m
2026-05-28 CSN6141 HRB → PVG May 28, 02:05 UTCMay 29, 02:00 UTC23h 55m
2026-05-28 CSN6259 HRB → HGH May 28, 01:20 UTCMay 28, 10:30 UTC9h 10m
2026-05-26 CSN6257 HRB → PVG May 26, 00:35 UTCMay 26, 13:29 UTC12h 55m
2026-05-25 CSN5974 CSX → HRB May 25, 13:00 UTCMay 26, 09:15 UTC20h 14m
2026-05-23 CSN6251 HRB → PVG May 23, 00:50 UTCMay 23, 09:35 UTC8h 45m
2026-05-22 CSN6251 HRB → PVG May 22, 10:25 UTCMay 23, 09:35 UTC23h 9m
2026-05-22 CSN6141 HRB → PVG May 22, 00:45 UTCMay 22, 10:40 UTC9h 55m
2026-05-17 CSN6086 NRT → HRB May 17, 04:05 UTCMay 17, 10:35 UTC6h 30m
2026-05-17 CSN6085 HRB → NRT May 17, 01:45 UTCMay 17, 02:20 UTC35m
2026-05-16 CSN3744 SZX → HRB May 16, 09:40 UTCMay 16, 09:51 UTC10m
2026-05-16 CSN3743 HRB → SZX May 16, 06:45 UTCMay 16, 07:01 UTC15m
2026-05-09 CSN6256 TFU → HRB May 9, 09:40 UTCMay 10, 01:09 UTC15h 30m
2026-05-08 CSN8640 CGO → HRB May 8, 15:40 UTCMay 9, 09:55 UTC18h 15m
2026-05-07 CSN6259 HRB → HGH May 7, 01:20 UTCMay 7, 10:35 UTC9h 15m
2026-05-06 CSN6346 CKG → HRB May 6, 11:10 UTCMay 7, 10:00 UTC22h 50m
2026-05-06 CSN6248 XIY → HRB May 6, 00:46 UTCMay 6, 11:25 UTC10h 40m
2026-05-05 CSN6346 CKG → HRB May 5, 11:20 UTCMay 6, 01:01 UTC13h 40m
2026-05-04 CSN5970 XIY → HRB May 4, 07:00 UTCMay 4, 07:20 UTC20m
2026-05-03 CSN6086 NRT → HRB May 3, 04:05 UTCMay 3, 04:40 UTC35m
2026-05-02 CSN6085 HRB → NRT May 2, 15:55 UTCMay 3, 02:20 UTC10h 25m
2026-05-02 CSN8639 CGO → HAK May 2, 03:55 UTCMay 2, 04:10 UTC15m
2026-05-01 CSN3744 SZX → HRB May 1, 11:55 UTCMay 1, 12:10 UTC15m
2026-05-01 CSN3744 SZX → HRB May 1, 09:35 UTCMay 1, 09:45 UTC10m
2026-05-01 CSN3459 SZX → KMG May 1, 02:05 UTCMay 1, 02:25 UTC20m
2026-04-30 CSN5919 SZX → CKG Apr 30, 09:15 UTCApr 30, 09:30 UTC15m
2026-04-29 CSN5974 CSX → HRB Apr 29, 13:10 UTCApr 30, 04:30 UTC15h 19m
2026-04-29 CSN5974 CSX → HRB Apr 29, 00:54 UTCApr 29, 13:25 UTC12h 30m
2026-04-28 CSN5973 HRB → CSX Apr 28, 10:10 UTCApr 29, 01:05 UTC14h 55m
2026-04-28 CSN6259 HRB → HGH Apr 28, 01:50 UTCApr 28, 10:45 UTC8h 55m
2026-04-27 CSN6202 PKX → HRB Apr 27, 14:55 UTCApr 27, 15:05 UTC10m
2026-04-26 CSN5974 CSX → HRB Apr 26, 13:10 UTCApr 27, 06:55 UTC17h 45m
2026-04-26 CSN5974 CSX → HRB Apr 26, 01:10 UTCApr 26, 13:30 UTC12h 20m
2026-04-25 CSN3623 CAN → HRB Apr 25, 09:10 UTCApr 26, 01:10 UTC16h 0m
2026-04-24 CSN5300 JHG → PKX Apr 24, 06:00 UTCApr 25, 02:10 UTC20h 10m
2026-04-24 CSN5983 PKX → HRB Apr 24, 01:45 UTCApr 24, 06:05 UTC4h 20m
2026-04-22 CSN8640 CGO → HRB Apr 22, 15:50 UTCApr 23, 09:55 UTC18h 5m
2026-04-22 CSN8639 CGO → HAK Apr 22, 04:00 UTCApr 22, 04:10 UTC10m
2026-04-20 CSN5824 WUH → HRB Apr 20, 02:00 UTCApr 20, 06:50 UTC4h 50m
2026-04-19 CSN5824 WUH → HRB Apr 19, 10:35 UTCApr 20, 06:50 UTC20h 15m
2026-04-19 CSN6259 HRB → HGH Apr 19, 01:10 UTCApr 19, 10:35 UTC9h 25m
2026-04-18 CSN5299 - Apr 18, 14:20 UTCApr 19, 10:35 UTC20h 15m
2026-04-13 CSN364 - Apr 13, 12:20 UTCApr 13, 12:30 UTC10m
2026-04-13 CSN363 CAN → BKK Apr 13, 10:15 UTCApr 13, 10:25 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-308D page for operator, model, and routing details .

Mode-S 781690 frequently asked

What is Mode-S code 781690?
781690 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-308D.
Where is Mode-S 781690 registered?
Mode-S code 781690 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781690 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781690, octal 36013220, decimal 7,870,096.
What flights does 781690 operate?
Mode-S 781690 has broadcast 20 distinct callsigns, including CSN5974, CSN6259, CSN3744, CSN8640, CSN8639.