Apparatus

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sensors Mode-S transponder

780B73

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-9959 · AIRBUS A-320

Hex
780B73
Octal
36005563
Decimal
7,867,251
Country
CN
Tail
B-9959
Type
A320
No current signal · last broadcast Jul 26, 13:15 UTC
Flights observed
91
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 13:15 UTC

Last known position

Most recent position reported by Mode-S 780B73.

Country allocation

The ICAO 24-bit address 780B73 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
CSN6851 China Southern Airlines 8 2026-06-09
CSN6620 - 7 2026-07-18
CSN6358 China Southern Airlines 6 2026-07-24
CSN6155 - 6 2026-07-19
CSN3353 - 5 2026-06-11
CSN6541 - 4 2026-06-21
CSN6364 - 4 2026-07-16
CSN6194 China Southern Airlines 4 2026-07-26
CSN6146 - 4 2026-06-25
CSN5954 China Southern Airlines 4 2026-07-25
CSN6619 - 3 2026-07-18
CSN6545 China Southern Airlines 3 2026-05-29
CSN6357 China Southern Airlines 3 2026-07-24
CSN8460 China Southern Airlines 2 2026-06-12
CSN8256 - 2 2026-07-04
CSN6603 - 2 2026-04-20
CSN6570 China Southern Airlines 2 2026-05-05
CSN6476 China Southern Airlines 2 2026-07-24
CSN6168 - 2 2026-07-17
CSN8459 China Southern Airlines 1 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN6419 KWE → CAN Jul 26, 13:00 UTCJul 26, 13:15 UTC15m
2026-07-26 CSN6194 PKX → CGQ Jul 26, 09:20 UTCJul 26, 09:30 UTC10m
2026-07-26 CSN6193 CGQ → PKX Jul 26, 06:45 UTCJul 26, 07:00 UTC15m
2026-07-25 CSN5954 CGO → CGQ Jul 25, 13:05 UTCJul 25, 13:30 UTC25m
2026-07-24 CSN6476 PKX → CGQ Jul 24, 15:00 UTCJul 25, 02:40 UTC11h 40m
2026-07-24 CSN6358 SZX → CGQ Jul 24, 08:10 UTCJul 24, 08:55 UTC45m
2026-07-24 CSN6358 SZX → CGQ Jul 24, 06:20 UTCJul 24, 06:35 UTC15m
2026-07-24 CSN6357 CGQ → SZX Jul 24, 04:10 UTCJul 24, 04:30 UTC20m
2026-07-23 CSN6357 CGQ → SZX Jul 23, 09:10 UTCJul 24, 01:55 UTC16h 45m
2026-07-21 CSN6420 CAN → KWE Jul 21, 09:15 UTCJul 22, 01:05 UTC15h 50m
2026-07-19 CSN6155 - Jul 19, 03:50 UTCJul 19, 13:45 UTC9h 55m
2026-07-18 CSN6620 - Jul 18, 12:20 UTCJul 18, 12:40 UTC20m
2026-07-18 CSN6620 - Jul 18, 08:25 UTCJul 18, 08:35 UTC10m
2026-07-18 CSN6619 - Jul 18, 01:34 UTCJul 18, 01:54 UTC20m
2026-07-17 CSN6168 - Jul 17, 12:35 UTCJul 17, 12:45 UTC10m
2026-07-16 CSN6364 - Jul 16, 07:15 UTCJul 16, 07:35 UTC20m
2026-07-15 CSN6476 - Jul 15, 15:00 UTCJul 15, 15:10 UTC10m
2026-07-15 CSN6179 - Jul 15, 12:50 UTCJul 15, 13:00 UTC10m
2026-07-15 CSN6358 - Jul 15, 09:00 UTCJul 15, 09:25 UTC25m
2026-07-15 CSN6358 - Jul 15, 06:45 UTCJul 15, 07:00 UTC15m
2026-07-14 CSN6357 - Jul 14, 12:35 UTCJul 15, 02:00 UTC13h 24m
2026-07-13 CSN6620 - Jul 13, 12:10 UTCJul 13, 12:25 UTC15m
2026-07-13 CSN6620 - Jul 13, 07:55 UTCJul 13, 08:10 UTC15m
2026-07-12 CSN6620 - Jul 12, 08:01 UTCJul 12, 12:10 UTC4h 10m
2026-07-12 CSN6619 - Jul 12, 05:50 UTCJul 12, 06:10 UTC20m
2026-07-11 CSN6619 - Jul 11, 07:25 UTCJul 12, 02:05 UTC18h 40m
2026-07-10 CSN6364 - Jul 10, 14:05 UTCJul 11, 07:50 UTC17h 46m
2026-07-09 CSN6168 - Jul 9, 12:40 UTCJul 9, 12:50 UTC10m
2026-07-08 CSN6155 - Jul 8, 03:45 UTCJul 8, 08:20 UTC4h 35m
2026-07-07 CSN6620 - Jul 7, 20:25 UTCJul 7, 20:40 UTC15m
2026-07-07 CSN6620 - Jul 7, 16:20 UTCJul 7, 16:40 UTC20m
2026-07-06 CSN5954 - Jul 6, 15:05 UTCJul 7, 10:30 UTC19h 25m
2026-07-06 CSN5954 - Jul 6, 06:10 UTCJul 7, 01:50 UTC19h 40m
2026-07-05 CSN6364 - Jul 5, 07:50 UTCJul 6, 06:10 UTC22h 20m
2026-07-04 CSN8256 - Jul 4, 12:55 UTCJul 5, 08:05 UTC19h 10m
2026-07-02 CSN6194 - Jul 2, 09:15 UTCJul 3, 01:00 UTC15h 45m
2026-07-01 CSN6194 - Jul 1, 09:10 UTCJul 1, 09:20 UTC10m
2026-06-29 CSN5141 - Jun 29, 03:49 UTCJun 29, 08:09 UTC4h 20m
2026-06-28 CSN6364 - Jun 28, 07:25 UTCJun 29, 03:54 UTC20h 30m
2026-06-25 CSN6146 - Jun 25, 03:50 UTCJun 25, 03:59 UTC10m
2026-06-22 CSN5954 CGO → CGQ Jun 22, 13:10 UTCJun 22, 13:25 UTC15m
2026-06-21 CSN6541 - Jun 21, 01:30 UTCJun 21, 01:39 UTC10m
2026-06-19 CSN8256 CKG → CGQ Jun 19, 12:39 UTCJun 19, 12:59 UTC20m
2026-06-14 CSN6358 - Jun 14, 06:55 UTCJun 14, 07:10 UTC15m
2026-06-13 CSN6358 SZX → CGQ Jun 13, 07:15 UTCJun 13, 07:30 UTC15m
2026-06-12 CSN6553 CGQ → PVG Jun 12, 09:20 UTCJun 13, 01:50 UTC16h 30m
2026-06-12 CSN8460 CAN → CGQ Jun 12, 04:55 UTCJun 13, 01:50 UTC20h 55m
2026-06-11 CSN3353 - Jun 11, 15:10 UTCJun 11, 15:25 UTC15m
2026-06-10 CSN8459 CGQ → CAN Jun 10, 05:00 UTCJun 10, 10:35 UTC5h 35m
2026-06-09 CSN6851 CGQ → CAN Jun 9, 07:25 UTCJun 10, 05:15 UTC21h 50m

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-9959 page for operator, model, and routing details .

Mode-S 780B73 frequently asked

What is Mode-S code 780B73?
780B73 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-9959.
Where is Mode-S 780B73 registered?
Mode-S code 780B73 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780B73 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780B73, octal 36005563, decimal 7,867,251.
What flights does 780B73 operate?
Mode-S 780B73 has broadcast 20 distinct callsigns, including CSN6851, CSN6620, CSN6358, CSN6155, CSN3353.