Apparatus

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sensors Mode-S transponder

780999

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5716 · BOEING 737-800

Hex
780999
Octal
36004631
Decimal
7,866,777
Country
CN
Tail
B-5716
Type
B738
No current signal · last broadcast Jul 24, 12:50 UTC
Flights observed
109
Distinct callsigns
20
Country
CN
Last broadcast
Jul 24, 12:50 UTC

Last known position

Most recent position reported by Mode-S 780999.

Country allocation

The ICAO 24-bit address 780999 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
CSN3857 - 19 2026-07-16
CSN8521 China Southern Airlines 12 2026-07-20
CSN6704 China Southern Airlines 10 2026-07-21
CSN5147 - 7 2026-07-07
CSN8540 - 4 2026-06-16
CSN6703 - 4 2026-07-21
CSN6195 - 4 2026-06-30
CSN5153 - 4 2026-05-06
CSN5148 - 4 2026-06-25
CSN3875 - 4 2026-06-12
CSN8539 - 3 2026-07-13
CSN6742 - 3 2026-07-12
CSN3885 - 3 2026-07-14
CSN5929 - 2 2026-06-28
CSN5887 - 2 2026-07-09
CSN5742 - 2 2026-06-27
CSN5154 - 2 2026-05-07
CSN3886 - 2 2026-07-07
CSN3876 China Southern Airlines 2 2026-06-13
CSN3866 - 2 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 CSN3862 - Jul 24, 12:35 UTCJul 24, 12:50 UTC15m
2026-07-24 CSN3725 YIW → PKX Jul 24, 09:55 UTCJul 24, 10:20 UTC25m
2026-07-23 CSN3866 - Jul 23, 00:50 UTCJul 23, 06:20 UTC5h 30m
2026-07-22 CSN3883 CAN → YIW Jul 22, 03:25 UTCJul 22, 03:35 UTC10m
2026-07-21 CSN6704 ZUH → YIW Jul 21, 11:00 UTCJul 21, 11:10 UTC10m
2026-07-21 CSN6703 - Jul 21, 03:35 UTCJul 21, 03:45 UTC10m
2026-07-21 CSN6703 - Jul 21, 00:55 UTCJul 21, 01:15 UTC20m
2026-07-20 CSN8521 SHE → YIW Jul 20, 03:40 UTCJul 20, 04:05 UTC25m
2026-07-19 CSN8521 SHE → YIW Jul 19, 04:20 UTCJul 20, 04:05 UTC23h 45m
2026-07-18 CSN8521 SHE → YIW Jul 18, 11:35 UTCJul 19, 04:35 UTC17h 0m
2026-07-18 CSN8521 SHE → YIW Jul 18, 08:00 UTCJul 19, 04:35 UTC20h 35m
2026-07-18 CSN8521 SHE → YIW Jul 18, 04:20 UTCJul 19, 04:10 UTC23h 50m
2026-07-18 CSN8521 SHE → YIW Jul 18, 03:50 UTCJul 18, 11:35 UTC7h 45m
2026-07-16 CSN3857 - Jul 16, 23:59 UTCJul 17, 04:59 UTC5h 0m
2026-07-14 CSN3885 - Jul 14, 12:30 UTCJul 14, 13:00 UTC30m
2026-07-14 CSN6704 - Jul 14, 09:00 UTCJul 14, 09:10 UTC10m
2026-07-13 CSN8539 - Jul 13, 06:45 UTCJul 13, 11:55 UTC5h 10m
2026-07-12 CSN6742 - Jul 12, 12:10 UTCJul 13, 05:05 UTC16h 55m
2026-07-12 CSN6742 - Jul 12, 09:00 UTCJul 13, 05:05 UTC20h 5m
2026-07-12 - - Jul 12, 03:45 UTCJul 12, 03:55 UTC10m
2026-07-10 CSN6741 - Jul 10, 09:50 UTCJul 10, 13:35 UTC3h 45m
2026-07-09 CSN5887 - Jul 9, 09:30 UTCJul 9, 13:50 UTC4h 20m
2026-07-08 CSN6704 - Jul 8, 10:25 UTCJul 8, 10:35 UTC10m
2026-07-08 CSN6704 - Jul 8, 07:35 UTCJul 8, 07:50 UTC15m
2026-07-07 CSN3886 - Jul 7, 17:55 UTCJul 7, 18:05 UTC10m
2026-07-07 CSN5147 - Jul 7, 04:00 UTCJul 7, 15:55 UTC11h 55m
2026-07-06 CSN8521 - Jul 6, 04:40 UTCJul 7, 04:05 UTC23h 25m
2026-07-04 CSN8521 - Jul 4, 12:30 UTCJul 5, 04:30 UTC16h 0m
2026-07-04 CSN8521 - Jul 4, 04:50 UTCJul 4, 09:55 UTC5h 5m
2026-07-03 CSN8521 - Jul 3, 13:35 UTCJul 4, 09:55 UTC20h 20m
2026-07-03 CSN8521 - Jul 3, 09:15 UTCJul 4, 05:30 UTC20h 15m
2026-07-02 CSN5718 - Jul 2, 03:50 UTCJul 2, 04:00 UTC10m
2026-07-01 CSN6742 - Jul 1, 09:15 UTCJul 1, 12:40 UTC3h 25m
2026-06-30 CSN6195 - Jun 30, 03:00 UTCJun 30, 03:10 UTC10m
2026-06-29 CSN3796 - Jun 29, 01:14 UTCJun 29, 01:25 UTC10m
2026-06-28 CSN5929 - Jun 28, 13:49 UTCJun 28, 14:04 UTC15m
2026-06-27 CSN3857 - Jun 27, 23:55 UTCJun 28, 11:50 UTC11h 55m
2026-06-27 CSN5742 - Jun 27, 07:45 UTCJun 27, 11:50 UTC4h 5m
2026-06-25 CSN5148 - Jun 25, 13:00 UTCJun 25, 13:14 UTC15m
2026-06-25 CSN5147 - Jun 25, 04:29 UTCJun 25, 09:34 UTC5h 5m
2026-06-23 CSN3857 - Jun 23, 23:50 UTCJun 24, 11:59 UTC12h 10m
2026-06-21 CSN3866 - Jun 21, 00:49 UTCJun 21, 06:24 UTC5h 35m
2026-06-17 CSN6704 - Jun 17, 09:25 UTCJun 17, 09:35 UTC10m
2026-06-16 CSN8540 - Jun 16, 12:00 UTCJun 17, 04:45 UTC16h 46m
2026-06-16 CSN8540 - Jun 16, 06:50 UTCJun 17, 04:45 UTC21h 56m
2026-06-15 CSN3857 - Jun 15, 23:45 UTCJun 16, 12:10 UTC12h 25m
2026-06-14 CSN5929 - Jun 14, 13:50 UTCJun 14, 14:05 UTC15m
2026-06-13 CSN3857 - Jun 13, 23:55 UTCJun 14, 05:00 UTC5h 5m
2026-06-13 CSN3876 SZX → YIW Jun 13, 02:55 UTCJun 13, 03:45 UTC50m
2026-06-12 CSN3875 - Jun 12, 06:40 UTCJun 13, 01:05 UTC18h 25m

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-5716 page for operator, model, and routing details .

Mode-S 780999 frequently asked

What is Mode-S code 780999?
780999 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5716.
Where is Mode-S 780999 registered?
Mode-S code 780999 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780999 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 12:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780999, octal 36004631, decimal 7,866,777.
What flights does 780999 operate?
Mode-S 780999 has broadcast 20 distinct callsigns, including CSN3857, CSN8521, CSN6704, CSN5147, CSN8540.