Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78099A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5717 · BOEING 737-800

Hex
78099A
Octal
36004632
Decimal
7,866,778
Country
CN
Tail
B-5717
Type
B738
No current signal · last broadcast 11h ago
Flights observed
74
Distinct callsigns
20
Country
CN
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 78099A.

Country allocation

The ICAO 24-bit address 78099A 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
CSN6703 China Southern Airlines 8 2026-06-02
CSN3279 - 8 2026-07-10
CSN6704 China Southern Airlines 7 2026-06-02
CSN3280 - 6 2026-07-10
CSN5147 China Southern Airlines 5 2026-06-09
CSN3794 - 5 2026-07-15
CSN3793 - 5 2026-07-15
CSN8539 - 2 2026-05-10
CSN3885 - 2 2026-04-20
CSN3876 China Southern Airlines 2 2026-06-03
CSN3875 China Southern Airlines 2 2026-06-03
CSN3795 China Southern Airlines 2 2026-05-21
CSN3419 - 2 2026-07-17
CSN8824 China Southern Airlines 1 2026-06-24
CSN8356 - 1 2026-04-30
CSN8355 - 1 2026-04-29
CSN6742 China Southern Airlines 1 2026-06-12
CSN6195 - 1 2026-05-29
CSN3886 China Southern Airlines 1 2026-04-21
CSN3884 China Southern Airlines 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CSN3419 - Jul 17, 14:30 UTCJul 17, 14:44 UTC15m
2026-07-15 CSN3793 - Jul 15, 14:40 UTCJul 15, 14:50 UTC10m
2026-07-15 CSN3794 - Jul 15, 13:00 UTCJul 15, 13:10 UTC10m
2026-07-14 - - Jul 14, 08:50 UTCJul 14, 09:00 UTC10m
2026-07-13 CSN3419 - Jul 13, 14:25 UTCJul 13, 15:00 UTC35m
2026-07-12 CSN3793 - Jul 12, 14:25 UTCJul 12, 14:40 UTC15m
2026-07-12 CSN3794 - Jul 12, 12:10 UTCJul 12, 12:30 UTC20m
2026-07-10 CSN3279 - Jul 10, 03:20 UTCJul 10, 03:35 UTC15m
2026-07-10 CSN3280 - Jul 10, 01:45 UTCJul 10, 02:00 UTC15m
2026-07-09 CSN3279 - Jul 9, 04:45 UTCJul 9, 04:55 UTC10m
2026-07-09 CSN3280 - Jul 9, 01:45 UTCJul 9, 02:00 UTC15m
2026-07-07 CSN3793 - Jul 7, 20:30 UTCJul 7, 20:40 UTC10m
2026-07-07 CSN3794 - Jul 7, 18:50 UTCJul 7, 19:10 UTC20m
2026-06-29 CSN3793 - Jun 29, 14:44 UTCJun 29, 14:54 UTC10m
2026-06-29 CSN3794 - Jun 29, 12:39 UTCJun 29, 12:49 UTC10m
2026-06-28 CSN3280 - Jun 28, 01:44 UTCJun 28, 01:59 UTC15m
2026-06-27 CSN3279 - Jun 27, 03:15 UTCJun 27, 03:25 UTC10m
2026-06-26 CSN3793 - Jun 26, 15:54 UTCJun 26, 16:05 UTC10m
2026-06-25 CSN3279 - Jun 25, 03:24 UTCJun 25, 03:34 UTC10m
2026-06-25 CSN3280 - Jun 25, 01:54 UTCJun 25, 02:05 UTC10m
2026-06-24 CSN8824 XIY → PKX Jun 24, 09:59 UTCJun 24, 10:14 UTC15m
2026-06-23 CSN3279 - Jun 23, 03:20 UTCJun 23, 03:29 UTC10m
2026-06-21 CSN3279 - Jun 21, 03:10 UTCJun 21, 03:19 UTC10m
2026-06-21 CSN3280 - Jun 21, 01:35 UTCJun 21, 01:45 UTC10m
2026-06-18 CSN3794 - Jun 18, 18:10 UTCJun 18, 18:25 UTC15m
2026-06-18 CSN3279 - Jun 18, 12:15 UTCJun 18, 12:25 UTC10m
2026-06-18 CSN3280 - Jun 18, 07:50 UTCJun 18, 08:05 UTC15m
2026-06-15 CSN3279 - Jun 15, 03:15 UTCJun 15, 03:30 UTC15m
2026-06-12 CSN6742 CGQ → YIW Jun 12, 09:10 UTCJun 12, 13:00 UTC3h 50m
2026-06-11 CSN3728 YIW → CAN Jun 11, 04:20 UTCJun 11, 04:35 UTC15m
2026-06-09 CSN5147 YIW → HAK Jun 9, 09:40 UTCJun 9, 12:50 UTC3h 10m
2026-06-07 CSN5147 YIW → HAK Jun 7, 04:25 UTCJun 7, 11:30 UTC7h 5m
2026-06-05 CSN3727 CAN → YIW Jun 5, 00:15 UTCJun 5, 00:30 UTC15m
2026-06-03 CSN3876 SZX → YIW Jun 3, 04:05 UTCJun 3, 04:55 UTC50m
2026-06-03 CSN3875 YIW → SZX Jun 3, 00:40 UTCJun 3, 01:00 UTC20m
2026-06-02 CSN6704 ZUH → YIW Jun 2, 08:30 UTCJun 2, 08:45 UTC15m
2026-06-02 CSN6703 YIW → ZUH Jun 2, 02:45 UTCJun 2, 03:20 UTC35m
2026-05-29 CSN6195 - May 29, 23:40 UTCMay 30, 03:45 UTC4h 5m
2026-05-28 CSN3274 SZX → NNG May 28, 13:55 UTCMay 28, 14:20 UTC25m
2026-05-28 CSN3273 NNG → SZX May 28, 10:20 UTCMay 28, 10:45 UTC25m
2026-05-24 CSN3876 SZX → YIW May 24, 05:30 UTCMay 24, 06:20 UTC50m
2026-05-24 CSN3875 YIW → SZX May 24, 00:40 UTCMay 24, 01:00 UTC20m
2026-05-23 CSN3883 CAN → YIW May 23, 03:25 UTCMay 23, 03:35 UTC10m
2026-05-22 CSN5147 YIW → HAK May 22, 08:05 UTCMay 22, 12:15 UTC4h 10m
2026-05-21 CSN5147 YIW → HAK May 21, 09:00 UTCMay 22, 08:20 UTC23h 20m
2026-05-21 CSN3795 CAN → YIW May 21, 08:00 UTCMay 21, 08:10 UTC10m
2026-05-17 CSN6704 ZUH → YIW May 17, 10:10 UTCMay 17, 10:20 UTC10m
2026-05-17 CSN6703 YIW → ZUH May 17, 01:40 UTCMay 17, 01:55 UTC15m
2026-05-15 CSN3866 - May 15, 16:00 UTCMay 16, 06:16 UTC14h 16m
2026-05-12 CSN3825 WUH → TAO May 12, 07:55 UTCMay 12, 08:10 UTC15m

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-5717 page for operator, model, and routing details .

Mode-S 78099A frequently asked

What is Mode-S code 78099A?
78099A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5717.
Where is Mode-S 78099A registered?
Mode-S code 78099A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78099A broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78099A, octal 36004632, decimal 7,866,778.
What flights does 78099A operate?
Mode-S 78099A has broadcast 20 distinct callsigns, including CSN6703, CSN3279, CSN6704, CSN3280, CSN5147.