Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781708

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-309L · AIRBUS A-320neo

Hex
781708
Octal
36013410
Decimal
7,870,216
Country
CN
Tail
B-309L
Type
A20N
No current signal · last broadcast 2d ago
Flights observed
47
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781708.

Country allocation

The ICAO 24-bit address 781708 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
CSN6442 China Southern Airlines 4 2026-05-08
CSN638 China Southern Airlines 4 2026-05-31
CSN6073 China Southern Airlines 4 2026-05-19
CSN6620 China Southern Airlines 3 2026-05-20
CSN6168 China Southern Airlines 3 2026-05-19
CSN8459 China Southern Airlines 2 2026-05-27
CSN8023 China Southern Airlines 2 2026-05-21
CSN688 China Southern Airlines 2 2026-05-19
CSN6851 China Southern Airlines 2 2026-05-30
CSN6545 China Southern Airlines 2 2026-05-10
CSN637 China Southern Airlines 2 2026-05-31
CSN6194 China Southern Airlines 2 2026-05-09
CSN6167 China Southern Airlines 2 2026-05-19
CSN6074 China Southern Airlines 2 2026-05-02
CSN8460 China Southern Airlines 1 2026-05-28
CSN8024 China Southern Airlines 1 2026-05-21
CSN687 China Southern Airlines 1 2026-05-18
CSN6852 China Southern Airlines 1 2026-04-24
CSN6619 China Southern Airlines 1 2026-05-07
CSN6570 China Southern Airlines 1 2026-05-01

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-05-31 CSN638 ICN → CGQ May 31, 10:35 UTCMay 31, 10:55 UTC20m
2026-05-31 CSN637 CGQ → ICN May 31, 08:35 UTCMay 31, 09:00 UTC25m
2026-05-30 CSN6851 CGQ → CAN May 30, 07:20 UTCMay 30, 07:45 UTC25m
2026-05-28 CSN8460 CAN → CGQ May 28, 10:45 UTCMay 28, 11:00 UTC15m
2026-05-28 CSN6282 - May 28, 00:20 UTCMay 28, 00:30 UTC10m
2026-05-27 CSN8459 CGQ → CAN May 27, 03:24 UTCMay 27, 03:45 UTC20m
2026-05-21 CSN8024 BKK → CAN May 21, 11:55 UTCMay 21, 12:25 UTC30m
2026-05-21 CSN8023 CAN → BKK May 21, 10:05 UTCMay 21, 10:35 UTC30m
2026-05-21 CSN8023 CAN → BKK May 21, 08:20 UTCMay 21, 08:30 UTC10m
2026-05-20 CSN8459 CGQ → CAN May 20, 14:05 UTCMay 21, 03:30 UTC13h 25m
2026-05-20 CSN6620 ZUH → WUH May 20, 10:10 UTCMay 20, 10:30 UTC20m
2026-05-19 CSN6168 PKX → CGQ May 19, 12:30 UTCMay 20, 01:45 UTC13h 15m
2026-05-19 CSN6167 CGQ → PKX May 19, 10:05 UTCMay 19, 10:15 UTC10m
2026-05-19 CSN688 ICN → CGQ May 19, 05:40 UTCMay 19, 06:00 UTC20m
2026-05-19 CSN6073 YNJ → ICN May 19, 02:55 UTCMay 19, 03:55 UTC1h 0m
2026-05-18 CSN6073 YNJ → ICN May 18, 04:40 UTCMay 19, 03:55 UTC23h 14m
2026-05-18 CSN687 CGQ → ICN May 18, 02:25 UTCMay 18, 02:40 UTC15m
2026-05-17 CSN6541 CGQ → PVG May 17, 01:35 UTCMay 17, 01:45 UTC10m
2026-05-10 CSN6545 CGQ → HGH May 10, 00:45 UTCMay 10, 14:09 UTC13h 25m
2026-05-09 CSN6545 CGQ → HGH May 9, 10:05 UTCMay 10, 08:50 UTC22h 45m
2026-05-09 CSN6194 PKX → CGQ May 9, 09:55 UTCMay 10, 00:49 UTC14h 55m
2026-05-08 CSN6442 TFU → CGQ May 8, 08:14 UTCMay 9, 04:00 UTC19h 45m
2026-05-07 CSN6620 ZUH → WUH May 7, 12:05 UTCMay 8, 08:34 UTC20h 30m
2026-05-07 CSN6620 ZUH → WUH May 7, 08:00 UTCMay 7, 08:10 UTC10m
2026-05-07 CSN6619 CGQ → WUH May 7, 01:35 UTCMay 7, 01:50 UTC15m
2026-05-05 CSN6460 KMG → CGQ May 5, 04:00 UTCMay 5, 14:10 UTC10h 10m
2026-05-04 CSN6442 TFU → CGQ May 4, 08:30 UTCMay 5, 04:20 UTC19h 51m
2026-05-03 CSN638 ICN → CGQ May 3, 05:45 UTCMay 3, 05:55 UTC10m
2026-05-02 CSN6074 ICN → YNJ May 2, 10:35 UTCMay 3, 03:10 UTC16h 35m
2026-05-02 CSN688 ICN → CGQ May 2, 04:30 UTCMay 2, 04:45 UTC15m
2026-05-01 CSN6168 PKX → CGQ May 1, 12:30 UTCMay 1, 12:45 UTC15m
2026-05-01 CSN6570 XIY → CGQ May 1, 06:10 UTCMay 1, 06:25 UTC15m
2026-04-30 CSN6194 PKX → CGQ Apr 30, 09:15 UTCApr 30, 09:25 UTC10m
2026-04-29 CSN6442 TFU → CGQ Apr 29, 10:45 UTCApr 29, 11:05 UTC20m
2026-04-28 CSN6442 TFU → CGQ Apr 28, 08:05 UTCApr 28, 08:20 UTC15m
2026-04-26 CSN6168 PKX → CGQ Apr 26, 12:35 UTCApr 27, 08:05 UTC19h 30m
2026-04-26 CSN6167 CGQ → PKX Apr 26, 10:00 UTCApr 26, 10:10 UTC10m
2026-04-26 CSN638 ICN → CGQ Apr 26, 05:45 UTCApr 26, 06:00 UTC15m
2026-04-26 CSN6073 YNJ → ICN Apr 26, 03:55 UTCApr 26, 04:05 UTC10m
2026-04-24 CSN6852 CAN → CGQ Apr 24, 14:30 UTCApr 25, 08:35 UTC18h 5m
2026-04-24 CSN6851 CGQ → CAN Apr 24, 03:30 UTCApr 24, 14:45 UTC11h 15m
2026-04-21 CSN6341 CGQ → CAN Apr 21, 01:15 UTCApr 21, 13:01 UTC11h 45m
2026-04-18 CSN638 ICN → CGQ Apr 18, 05:35 UTCApr 18, 05:50 UTC15m
2026-04-18 CSN6073 YNJ → ICN Apr 18, 03:50 UTCApr 18, 04:05 UTC15m
2026-04-17 CSN6074 ICN → YNJ Apr 17, 10:50 UTCApr 17, 11:05 UTC15m
2026-04-17 CSN637 CGQ → ICN Apr 17, 09:25 UTCApr 17, 09:35 UTC10m
2026-04-15 CSN6553 - Apr 15, 11:20 UTCApr 15, 11:55 UTC35m

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-309L page for operator, model, and routing details .

Mode-S 781708 frequently asked

What is Mode-S code 781708?
781708 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-309L.
Where is Mode-S 781708 registered?
Mode-S code 781708 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781708 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781708, octal 36013410, decimal 7,870,216.
What flights does 781708 operate?
Mode-S 781708 has broadcast 20 distinct callsigns, including CSN6442, CSN638, CSN6073, CSN6620, CSN6168.