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 Jul 25, 15:05 UTC
Flights observed
140
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 15:05 UTC

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 9 2026-07-25
CSN651 China Southern Airlines 8 2026-07-25
CSN665 China Southern Airlines 5 2026-07-19
CSN6309 China Southern Airlines 5 2026-06-12
CSN8700 China Southern Airlines 4 2026-06-01
CSN6529 - 4 2026-07-13
CSN6469 - 4 2026-07-08
CSN6388 China Southern Airlines 4 2026-05-07
CSN6367 - 4 2026-07-16
CSN6304 - 4 2026-06-21
CSN6303 - 4 2026-06-26
CSN3955 China Southern Airlines 4 2026-06-02
CSN8699 China Southern Airlines 3 2026-05-31
CSN8598 China Southern Airlines 3 2026-05-30
CSN8597 China Southern Airlines 3 2026-06-02
CSN666 China Southern Airlines 3 2026-07-20
CSN6517 China Southern Airlines 3 2026-07-20
CSN6483 China Southern Airlines 3 2026-05-02
CSN6347 China Southern Airlines 3 2026-07-22
CSN6310 China Southern Airlines 3 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CSN652 ICN → SHE Jul 25, 03:10 UTCJul 25, 15:05 UTC11h 55m
2026-07-25 CSN651 SHE → ICN Jul 25, 00:50 UTCJul 25, 01:30 UTC40m
2026-07-24 CSN5364 KMG → SHE Jul 24, 04:05 UTCJul 24, 15:35 UTC11h 30m
2026-07-23 CSN6348 CAN → SHE Jul 23, 11:30 UTCJul 24, 04:25 UTC16h 55m
2026-07-22 CSN6347 SHE → CAN Jul 22, 11:15 UTCJul 23, 05:40 UTC18h 25m
2026-07-22 CSN6368 CAN → SHE Jul 22, 02:40 UTCJul 22, 11:25 UTC8h 45m
2026-07-21 CSN6518 XMN → SHE Jul 21, 07:20 UTCJul 22, 02:50 UTC19h 30m
2026-07-20 CSN6517 SHE → XMN Jul 20, 15:25 UTCJul 21, 07:35 UTC16h 9m
2026-07-20 CSN5363 SHE → KMG Jul 20, 08:10 UTCJul 21, 07:35 UTC23h 24m
2026-07-20 CSN666 PUS → SHE Jul 20, 02:25 UTCJul 20, 15:30 UTC13h 5m
2026-07-19 CSN665 SHE → PUS Jul 19, 23:55 UTCJul 20, 01:10 UTC1h 15m
2026-07-19 CSN665 SHE → PUS Jul 19, 02:50 UTCJul 20, 01:10 UTC22h 20m
2026-07-18 CSN651 - Jul 18, 14:30 UTCJul 19, 01:25 UTC10h 55m
2026-07-18 CSN5817 - Jul 18, 00:55 UTCJul 18, 14:45 UTC13h 51m
2026-07-17 CSN5817 - Jul 17, 11:50 UTCJul 18, 01:30 UTC13h 40m
2026-07-16 CSN6347 - Jul 16, 11:15 UTCJul 17, 04:59 UTC17h 45m
2026-07-16 CSN6367 - Jul 16, 03:15 UTCJul 16, 11:20 UTC8h 5m
2026-07-15 CSN6367 - Jul 15, 11:55 UTCJul 16, 11:20 UTC23h 25m
2026-07-15 CSN6367 - Jul 15, 04:45 UTCJul 16, 03:35 UTC22h 50m
2026-07-14 CSN5366 - Jul 14, 10:00 UTCJul 15, 05:00 UTC18h 59m
2026-07-13 CSN6529 - Jul 13, 02:15 UTCJul 13, 10:30 UTC8h 15m
2026-07-12 CSN6674 - Jul 12, 13:50 UTCJul 13, 10:30 UTC20h 40m
2026-07-12 CSN652 - Jul 12, 03:05 UTCJul 12, 14:01 UTC10h 55m
2026-07-11 CSN651 - Jul 11, 08:01 UTCJul 12, 01:15 UTC17h 15m
2026-07-11 CSN5857 - Jul 11, 01:05 UTCJul 11, 08:45 UTC7h 40m
2026-07-10 CSN6529 - Jul 10, 01:50 UTCJul 11, 01:40 UTC23h 50m
2026-07-09 CSN6529 - Jul 9, 15:15 UTCJul 10, 01:50 UTC10h 35m
2026-07-09 CSN6529 - Jul 9, 04:40 UTCJul 10, 01:50 UTC21h 10m
2026-07-08 CSN6470 - Jul 8, 11:10 UTCJul 9, 04:55 UTC17h 45m
2026-07-08 CSN6469 - Jul 8, 01:20 UTCJul 8, 11:25 UTC10h 5m
2026-07-07 CSN6469 - Jul 7, 10:10 UTCJul 8, 05:25 UTC19h 15m
2026-07-06 CSN8558 - Jul 6, 16:30 UTCJul 7, 10:15 UTC17h 45m
2026-07-06 CSN8558 - Jul 6, 01:15 UTCJul 6, 16:45 UTC15h 30m
2026-07-04 CSN6367 - Jul 4, 05:35 UTCJul 4, 13:40 UTC8h 5m
2026-07-03 CSN652 - Jul 3, 03:00 UTCJul 3, 03:25 UTC25m
2026-07-03 CSN651 - Jul 3, 01:00 UTCJul 3, 01:20 UTC20m
2026-07-01 CSN6465 - Jul 1, 14:30 UTCJul 2, 09:20 UTC18h 50m
2026-06-30 CSN6469 - Jun 30, 04:50 UTCJun 30, 12:05 UTC7h 15m
2026-06-29 CSN6469 - Jun 29, 12:45 UTCJun 30, 05:20 UTC16h 36m
2026-06-29 CSN6517 - Jun 29, 02:09 UTCJun 29, 13:30 UTC11h 20m
2026-06-28 CSN6517 - Jun 28, 12:35 UTCJun 29, 02:50 UTC14h 15m
2026-06-28 CSN6673 - Jun 28, 06:24 UTCJun 29, 02:50 UTC20h 25m
2026-06-28 CSN652 - Jun 28, 02:49 UTCJun 28, 12:50 UTC10h 0m
2026-06-28 CSN651 - Jun 28, 00:59 UTCJun 28, 01:19 UTC20m
2026-06-27 CSN682 - Jun 27, 04:05 UTCJun 27, 04:29 UTC25m
2026-06-27 CSN681 - Jun 27, 01:54 UTCJun 27, 02:20 UTC25m
2026-06-26 CSN6303 - Jun 26, 09:05 UTCJun 26, 09:24 UTC20m
2026-06-24 CSN5366 - Jun 24, 09:49 UTCJun 25, 04:54 UTC19h 5m
2026-06-23 CSN3601 CAN → SHE Jun 23, 15:34 UTCJun 24, 09:59 UTC18h 25m
2026-06-23 CSN6315 - Jun 23, 02:24 UTCJun 23, 15:44 UTC13h 20m

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 Jul 25, 15:05 UTC.
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, CSN651, CSN665, CSN6309, CSN8700.