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 Jul 26, 15:15 UTC
Flights observed
122
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 15:15 UTC

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
CSN6259 China Southern Airlines 13 2026-07-25
CSN5974 - 9 2026-07-02
CSN6085 China Southern Airlines 7 2026-07-25
CSN6141 China Southern Airlines 6 2026-07-26
CSN6086 China Southern Airlines 5 2026-07-22
CSN3744 - 5 2026-07-01
CSN6346 - 4 2026-06-23
CSN6296 - 4 2026-07-13
CSN5973 China Southern Airlines 4 2026-06-08
CSN5589 - 4 2026-07-20
CSN3624 - 4 2026-06-28
CSN6295 - 3 2026-07-19
CSN6274 - 3 2026-06-30
CSN6273 - 3 2026-06-30
CSN5983 China Southern Airlines 3 2026-07-21
CSN3743 - 3 2026-07-01
CSN3623 - 3 2026-06-26
CSN3615 - 3 2026-06-27
CSN8640 China Southern Airlines 2 2026-05-08
CSN8639 China Southern Airlines 2 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN6141 HRB → PVG Jul 26, 04:05 UTCJul 26, 15:15 UTC11h 11m
2026-07-25 CSN6085 HRB → NRT Jul 25, 10:25 UTCJul 26, 02:30 UTC16h 5m
2026-07-25 CSN8635 HRB → HGH Jul 25, 02:05 UTCJul 26, 02:00 UTC23h 55m
2026-07-25 CSN6259 HRB → HGH Jul 25, 01:40 UTCJul 25, 15:05 UTC13h 25m
2026-07-24 CSN6259 HRB → HGH Jul 24, 15:40 UTCJul 25, 11:05 UTC19h 25m
2026-07-24 CSN6259 HRB → HGH Jul 24, 06:30 UTCJul 25, 02:20 UTC19h 50m
2026-07-23 CSN6147 SYX → HRB Jul 23, 14:25 UTCJul 24, 07:05 UTC16h 40m
2026-07-23 CSN6147 SYX → HRB Jul 23, 10:10 UTCJul 24, 07:05 UTC20h 55m
2026-07-22 CSN6086 NRT → HRB Jul 22, 04:10 UTCJul 22, 04:45 UTC35m
2026-07-21 CSN6085 HRB → NRT Jul 21, 13:05 UTCJul 22, 02:35 UTC13h 30m
2026-07-21 CSN6085 HRB → NRT Jul 21, 06:10 UTCJul 22, 02:35 UTC20h 25m
2026-07-21 CSN5983 PKX → HRB Jul 21, 02:00 UTCJul 21, 02:10 UTC10m
2026-07-20 CSN5984 HRB → PKX Jul 20, 14:55 UTCJul 20, 15:10 UTC15m
2026-07-20 CSN5589 - Jul 20, 01:05 UTCJul 20, 06:00 UTC4h 55m
2026-07-19 CSN6295 - Jul 19, 14:50 UTCJul 19, 15:00 UTC10m
2026-07-19 CSN5589 - Jul 19, 01:00 UTCJul 19, 05:55 UTC4h 55m
2026-07-17 CSN6259 - Jul 17, 01:25 UTCJul 17, 11:25 UTC10h 0m
2026-07-16 CSN6259 - Jul 16, 13:15 UTCJul 17, 11:25 UTC22h 10m
2026-07-16 CSN6259 - Jul 16, 06:05 UTCJul 17, 05:55 UTC23h 50m
2026-07-16 CSN5983 - Jul 16, 01:50 UTCJul 16, 02:05 UTC15m
2026-07-14 CSN5300 - Jul 14, 02:20 UTCJul 14, 13:30 UTC11h 10m
2026-07-13 CSN6296 - Jul 13, 01:05 UTCJul 13, 10:30 UTC9h 25m
2026-07-12 CSN6295 - Jul 12, 13:45 UTCJul 12, 13:55 UTC10m
2026-07-12 CSN6296 - Jul 12, 01:00 UTCJul 12, 10:20 UTC9h 20m
2026-07-11 CSN6296 - Jul 11, 10:35 UTCJul 12, 05:45 UTC19h 10m
2026-07-11 CSN5589 - Jul 11, 06:05 UTCJul 12, 05:45 UTC23h 40m
2026-07-11 CSN5589 - Jul 11, 05:25 UTCJul 12, 01:15 UTC19h 50m
2026-07-11 CSN6296 - Jul 11, 01:00 UTCJul 11, 10:40 UTC9h 40m
2026-07-10 CSN6295 - Jul 10, 14:00 UTCJul 10, 14:20 UTC20m
2026-07-08 CSN6220 - Jul 8, 04:25 UTCJul 8, 04:35 UTC10m
2026-07-02 CSN5974 - Jul 2, 01:05 UTCJul 2, 14:50 UTC13h 45m
2026-07-01 CSN3744 - Jul 1, 13:15 UTCJul 2, 01:15 UTC12h 0m
2026-07-01 CSN3744 - Jul 1, 10:55 UTCJul 1, 11:05 UTC10m
2026-07-01 CSN3743 - Jul 1, 09:00 UTCJul 1, 09:25 UTC25m
2026-07-01 CSN3743 - Jul 1, 06:40 UTCJul 1, 06:50 UTC10m
2026-06-30 CSN6267 - Jun 30, 23:30 UTCJun 30, 23:45 UTC15m
2026-06-30 CSN6274 - Jun 30, 09:00 UTCJun 30, 09:15 UTC15m
2026-06-30 CSN6274 - Jun 30, 06:45 UTCJun 30, 06:55 UTC10m
2026-06-30 CSN6273 - Jun 30, 02:05 UTCJun 30, 02:15 UTC10m
2026-06-29 CSN3905 - Jun 29, 02:50 UTCJun 29, 15:00 UTC12h 10m
2026-06-28 CSN3624 - Jun 28, 13:49 UTCJun 29, 07:20 UTC17h 30m
2026-06-28 CSN3624 - Jun 28, 09:10 UTCJun 29, 07:20 UTC22h 10m
2026-06-28 CSN3624 - Jun 28, 01:59 UTCJun 28, 14:04 UTC12h 5m
2026-06-27 CSN3905 - Jun 27, 14:14 UTCJun 28, 13:59 UTC23h 45m
2026-06-27 CSN3616 - Jun 27, 06:50 UTCJun 28, 02:10 UTC19h 20m
2026-06-27 CSN3615 - Jun 27, 02:45 UTCJun 28, 01:59 UTC23h 15m
2026-06-26 CSN3624 - Jun 26, 13:40 UTCJun 27, 06:59 UTC17h 20m
2026-06-26 CSN3623 - Jun 26, 09:00 UTCJun 27, 06:59 UTC22h 0m
2026-06-26 CSN3623 - Jun 26, 02:09 UTCJun 26, 13:59 UTC11h 50m
2026-06-25 CSN3615 - Jun 25, 04:04 UTCJun 26, 02:20 UTC22h 15m

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 Jul 26, 15:15 UTC.
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 CSN6259, CSN5974, CSN6085, CSN6141, CSN6086.