Apparatus

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sensors Mode-S transponder

781707

ICAO 24-bit transponder address · allocated to China

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

Hex
781707
Octal
36013407
Decimal
7,870,215
Country
CN
Tail
B-309M
Type
A20N
No current signal · last broadcast 3h ago
Flights observed
58
Distinct callsigns
20
Country
CN
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 781707.

Country allocation

The ICAO 24-bit address 781707 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
CSN652 China Southern Airlines 5 2026-05-07
CSN6388 China Southern Airlines 4 2026-05-07
CSN665 China Southern Airlines 3 2026-04-19
CSN651 China Southern Airlines 3 2026-04-25
CSN6483 China Southern Airlines 3 2026-05-02
CSN6304 China Southern Airlines 3 2026-04-28
CSN6265 China Southern Airlines 3 2026-05-26
CSN8700 China Southern Airlines 2 2026-05-29
CSN8699 China Southern Airlines 2 2026-05-29
CSN8598 China Southern Airlines 2 2026-04-28
CSN8597 China Southern Airlines 2 2026-05-30
CSN666 China Southern Airlines 2 2026-04-20
CSN6387 China Southern Airlines 2 2026-05-04
CSN6303 China Southern Airlines 2 2026-04-25
CSN6253 China Southern Airlines 2 2026-05-30
CSN3956 China Southern Airlines 2 2026-04-27
CSN3955 China Southern Airlines 2 2026-04-27
CSN8557 China Southern Airlines 1 2026-05-18
CSN6456 China Southern Airlines 1 2026-04-22
CSN6410 China Southern Airlines 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN8597 SZX → HGH May 30, 05:20 UTCMay 30, 05:30 UTC10m
2026-05-30 CSN6253 SZX → HAK May 30, 00:10 UTCMay 30, 00:25 UTC15m
2026-05-29 CSN8700 NKG → SZX May 29, 17:30 UTCMay 29, 17:50 UTC20m
2026-05-29 CSN8699 SZX → NKG May 29, 10:00 UTCMay 29, 10:15 UTC15m
2026-05-28 CSN6309 SHE → SZX May 28, 12:25 UTCMay 29, 05:20 UTC16h 55m
2026-05-26 CSN6265 SHE → HGH May 26, 06:20 UTCMay 26, 06:59 UTC40m
2026-05-25 CSN6265 SHE → HGH May 25, 09:50 UTCMay 26, 06:59 UTC21h 10m
2026-05-20 CSN6265 SHE → HGH May 20, 07:00 UTCMay 21, 01:30 UTC18h 30m
2026-05-18 CSN6403 SHE → CKG May 18, 14:45 UTCMay 19, 07:25 UTC16h 39m
2026-05-18 CSN8557 SHE → WUH May 18, 01:30 UTCMay 18, 14:55 UTC13h 25m
2026-05-17 CSN6312 SZX → SHE May 17, 05:50 UTCMay 17, 06:00 UTC10m
2026-05-17 CSN6325 - May 17, 03:55 UTCMay 17, 04:15 UTC20m
2026-05-15 CSN6328 - May 15, 15:20 UTCMay 15, 15:30 UTC10m
2026-05-07 CSN6388 ZUH → SHE May 7, 14:35 UTCMay 7, 14:50 UTC15m
2026-05-07 CSN6388 ZUH → SHE May 7, 12:15 UTCMay 7, 12:25 UTC10m
2026-05-07 CSN652 ICN → SHE May 7, 02:55 UTCMay 7, 08:00 UTC5h 5m
2026-05-04 CSN6388 ZUH → SHE May 4, 14:50 UTCMay 5, 10:00 UTC19h 11m
2026-05-04 CSN6388 ZUH → SHE May 4, 12:25 UTCMay 4, 12:35 UTC10m
2026-05-04 CSN6387 SHE → ZUH May 4, 07:35 UTCMay 4, 07:50 UTC15m
2026-05-03 CSN6387 SHE → ZUH May 3, 12:30 UTCMay 4, 07:50 UTC19h 20m
2026-05-02 CSN6483 SHE → SYX May 2, 02:00 UTCMay 2, 10:40 UTC8h 40m
2026-05-01 CSN6483 SHE → SYX May 1, 11:55 UTCMay 2, 10:40 UTC22h 45m
2026-05-01 CSN6483 SHE → SYX May 1, 05:00 UTCMay 2, 02:25 UTC21h 25m
2026-05-01 CSN6347 SHE → CAN May 1, 01:55 UTCMay 1, 12:05 UTC10h 10m
2026-04-30 CSN6410 TFU → SHE Apr 30, 04:50 UTCMay 1, 02:00 UTC21h 11m
2026-04-29 CSN5811 SHE → HGH Apr 29, 10:00 UTCApr 30, 05:05 UTC19h 4m
2026-04-28 CSN6304 SZX → SHE Apr 28, 13:20 UTCApr 28, 13:35 UTC15m
2026-04-28 CSN8598 HGH → SZX Apr 28, 11:40 UTCApr 28, 11:50 UTC10m
2026-04-28 CSN8598 HGH → SZX Apr 28, 10:40 UTCApr 28, 11:05 UTC25m
2026-04-28 CSN8597 SZX → HGH Apr 28, 05:15 UTCApr 28, 05:25 UTC10m
2026-04-28 CSN6254 HAK → SZX Apr 28, 03:30 UTCApr 28, 03:45 UTC15m
2026-04-28 CSN6253 SZX → HAK Apr 28, 00:35 UTCApr 28, 00:50 UTC15m
2026-04-27 CSN3956 HAK → SZX Apr 27, 16:35 UTCApr 27, 16:50 UTC15m
2026-04-27 CSN3955 SZX → HAK Apr 27, 13:00 UTCApr 27, 13:15 UTC15m
2026-04-27 CSN3621 SZX → TFU Apr 27, 01:35 UTCApr 27, 01:50 UTC15m
2026-04-26 CSN8700 NKG → SZX Apr 26, 14:40 UTCApr 26, 14:55 UTC15m
2026-04-26 CSN8699 SZX → NKG Apr 26, 09:35 UTCApr 26, 09:45 UTC10m
2026-04-26 CSN3459 SZX → KMG Apr 26, 01:50 UTCApr 26, 02:10 UTC20m
2026-04-25 CSN3956 HAK → SZX Apr 25, 16:15 UTCApr 25, 16:35 UTC20m
2026-04-25 CSN3955 SZX → HAK Apr 25, 13:10 UTCApr 25, 13:25 UTC15m
2026-04-25 CSN6303 SHE → SZX Apr 25, 10:50 UTCApr 25, 11:05 UTC15m
2026-04-25 CSN652 ICN → SHE Apr 25, 03:00 UTCApr 25, 08:40 UTC5h 40m
2026-04-25 CSN651 SHE → ICN Apr 25, 01:00 UTCApr 25, 01:15 UTC15m
2026-04-22 CSN6456 XIY → SHE Apr 22, 14:30 UTCApr 23, 05:50 UTC15h 20m
2026-04-21 CSN652 ICN → SHE Apr 21, 03:05 UTCApr 21, 03:25 UTC20m
2026-04-20 CSN6304 SZX → SHE Apr 20, 15:40 UTCApr 21, 00:55 UTC9h 15m
2026-04-20 CSN6304 SZX → SHE Apr 20, 13:20 UTCApr 20, 13:35 UTC15m
2026-04-20 CSN6303 SHE → SZX Apr 20, 11:30 UTCApr 20, 11:45 UTC15m
2026-04-20 CSN666 PUS → SHE Apr 20, 02:45 UTCApr 20, 08:55 UTC6h 10m
2026-04-19 CSN665 SHE → PUS Apr 19, 15:05 UTCApr 20, 01:05 UTC10h 0m

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

Mode-S 781707 frequently asked

What is Mode-S code 781707?
781707 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-309M.
Where is Mode-S 781707 registered?
Mode-S code 781707 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781707 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781707, octal 36013407, decimal 7,870,215.
What flights does 781707 operate?
Mode-S 781707 has broadcast 20 distinct callsigns, including CSN652, CSN6388, CSN665, CSN651, CSN6483.