Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781705

ICAO 24-bit transponder address · allocated to China

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

Hex
781705
Octal
36013405
Decimal
7,870,213
Country
CN
Tail
B-309K
Type
A20N
No current signal · last broadcast 12h ago
Flights observed
117
Distinct callsigns
20
Country
CN
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 781705.

Country allocation

The ICAO 24-bit address 781705 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
CSN6090 - 12 2026-07-09
CSN6059 - 12 2026-07-14
CSN3034 - 11 2026-06-29
CSN3033 - 11 2026-06-29
CSN8080 - 8 2026-07-13
CSN8149 - 7 2026-07-10
CSN8079 - 6 2026-07-13
CSN6089 - 6 2026-07-09
CSN8150 - 5 2026-07-10
CSN6060 - 5 2026-07-01
CSN3499 - 5 2026-07-13
CSN3415 - 5 2026-06-19
CSN6092 - 4 2026-07-11
CSN3992 - 2 2026-07-02
CSN3319 - 2 2026-07-05
CSN3035 - 2 2026-04-13
CSN8726 China Southern Airlines 1 2026-04-18
CSN6091 - 1 2026-07-11
CSN3996 - 1 2026-07-13
CSN3958 China Southern Airlines 1 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN6059 - Jul 14, 05:30 UTCJul 14, 05:45 UTC15m
2026-07-13 CSN3499 - Jul 13, 10:20 UTCJul 13, 10:30 UTC10m
2026-07-13 CSN8080 - Jul 13, 06:01 UTCJul 13, 06:25 UTC25m
2026-07-13 CSN8079 - Jul 13, 04:05 UTCJul 13, 04:25 UTC20m
2026-07-13 CSN3996 - Jul 13, 00:05 UTCJul 13, 00:25 UTC20m
2026-07-11 CSN6092 - Jul 11, 09:30 UTCJul 11, 09:45 UTC15m
2026-07-11 CSN6091 - Jul 11, 05:45 UTCJul 11, 05:55 UTC10m
2026-07-10 CSN8150 - Jul 10, 06:05 UTCJul 10, 06:35 UTC30m
2026-07-10 CSN8149 - Jul 10, 02:35 UTCJul 10, 02:45 UTC10m
2026-07-09 CSN6090 - Jul 9, 21:35 UTCJul 9, 22:05 UTC30m
2026-07-09 CSN6089 - Jul 9, 16:10 UTCJul 9, 16:20 UTC10m
2026-07-08 CSN6059 - Jul 8, 06:45 UTCJul 8, 11:30 UTC4h 45m
2026-07-06 CSN6092 - Jul 6, 08:35 UTCJul 6, 12:30 UTC3h 55m
2026-07-05 CSN3319 - Jul 5, 23:50 UTCJul 6, 00:00 UTC10m
2026-07-04 CSN6090 - Jul 4, 22:05 UTCJul 4, 22:20 UTC15m
2026-07-04 CSN6089 - Jul 4, 16:30 UTCJul 4, 16:40 UTC10m
2026-07-02 CSN3992 - Jul 2, 01:00 UTCJul 2, 01:10 UTC10m
2026-07-01 CSN6060 - Jul 1, 11:10 UTCJul 1, 11:20 UTC10m
2026-07-01 CSN6059 - Jul 1, 06:30 UTCJul 1, 06:40 UTC10m
2026-06-30 CSN6092 - Jun 30, 08:15 UTCJun 30, 11:15 UTC3h 0m
2026-06-29 CSN3034 - Jun 29, 11:50 UTCJun 30, 11:15 UTC23h 26m
2026-06-29 CSN3033 - Jun 29, 09:10 UTCJun 29, 10:44 UTC1h 35m
2026-06-29 CSN8150 - Jun 29, 02:20 UTCJun 29, 05:34 UTC3h 15m
2026-06-28 CSN8150 - Jun 28, 06:05 UTCJun 29, 05:15 UTC23h 10m
2026-06-28 CSN8149 - Jun 28, 03:19 UTCJun 29, 02:50 UTC23h 30m
2026-06-28 CSN8149 - Jun 28, 03:14 UTCJun 28, 06:44 UTC3h 30m
2026-06-24 CSN6060 - Jun 24, 09:49 UTCJun 24, 10:25 UTC35m
2026-06-24 CSN6059 - Jun 24, 05:09 UTCJun 24, 05:20 UTC10m
2026-06-23 CSN3034 - Jun 23, 11:54 UTCJun 23, 13:19 UTC1h 25m
2026-06-23 CSN3033 ZGN → CNX Jun 23, 01:25 UTCJun 23, 10:39 UTC9h 15m
2026-06-21 CSN3319 - Jun 21, 23:40 UTCJun 21, 23:50 UTC10m
2026-06-21 CSN8080 - Jun 21, 06:04 UTCJun 21, 07:40 UTC1h 35m
2026-06-21 CSN8079 - Jun 21, 02:35 UTCJun 21, 04:14 UTC1h 40m
2026-06-19 CSN3415 - Jun 19, 10:09 UTCJun 20, 04:09 UTC18h 0m
2026-06-19 CSN3415 - Jun 19, 05:19 UTCJun 20, 04:09 UTC22h 50m
2026-06-18 CSN3034 - Jun 18, 13:50 UTCJun 18, 15:15 UTC1h 25m
2026-06-18 CSN3033 - Jun 18, 11:15 UTCJun 18, 12:45 UTC1h 30m
2026-06-15 CSN8080 - Jun 15, 05:55 UTCJun 15, 07:25 UTC1h 30m
2026-06-15 CSN8079 - Jun 15, 02:10 UTCJun 15, 04:15 UTC2h 5m
2026-06-14 CSN3499 - Jun 14, 10:50 UTCJun 14, 11:35 UTC45m
2026-06-12 CSN3499 CAN → KMG Jun 12, 04:05 UTCJun 12, 11:05 UTC7h 0m
2026-06-11 CSN6060 PNH → CAN Jun 11, 05:15 UTCJun 11, 10:25 UTC5h 10m
2026-06-10 CSN6060 PNH → CAN Jun 10, 10:20 UTCJun 10, 10:35 UTC15m
2026-06-09 CSN6059 CAN → PNH Jun 9, 05:45 UTCJun 9, 06:00 UTC15m
2026-06-07 CSN6059 CAN → PNH Jun 7, 05:10 UTCJun 7, 05:20 UTC10m
2026-06-06 CSN6090 SGN → CAN Jun 6, 21:44 UTCJun 6, 21:54 UTC10m
2026-06-06 CSN6060 PNH → CAN Jun 6, 10:14 UTCJun 6, 10:25 UTC10m
2026-06-06 CSN6059 CAN → PNH Jun 6, 05:25 UTCJun 6, 05:35 UTC10m
2026-06-04 CSN6090 SGN → CAN Jun 4, 21:40 UTCJun 4, 22:10 UTC30m
2026-06-04 CSN3907 CAN → NTG Jun 4, 01:20 UTCJun 4, 01:30 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-309K page for operator, model, and routing details .

Mode-S 781705 frequently asked

What is Mode-S code 781705?
781705 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-309K.
Where is Mode-S 781705 registered?
Mode-S code 781705 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781705 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781705, octal 36013405, decimal 7,870,213.
What flights does 781705 operate?
Mode-S 781705 has broadcast 20 distinct callsigns, including CSN6090, CSN6059, CSN3034, CSN3033, CSN8080.