Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78099B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5718 · BOEING 737-800

Hex
78099B
Octal
36004633
Decimal
7,866,779
Country
CN
Tail
B-5718
Type
B738
No current signal · last broadcast 4h ago
Flights observed
49
Distinct callsigns
19
Country
CN
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 78099B.

Country allocation

The ICAO 24-bit address 78099B 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 19 distinct

Callsign Airline Flights Last seen
CSN5147 - 10 2026-07-14
CSN8521 - 8 2026-07-16
CSN3857 - 6 2026-07-21
CSN6704 - 3 2026-07-02
CSN5148 - 3 2026-07-12
CSN8540 - 2 2026-06-14
CSN8539 - 2 2026-07-08
CSN3886 - 2 2026-07-02
CSN3876 China Southern Airlines 2 2026-04-23
CSN3875 China Southern Airlines 2 2026-04-23
CSN6742 - 1 2026-07-06
CSN6703 - 1 2026-07-02
CSN6417 - 1 2026-06-15
CSN5929 - 1 2026-06-21
CSN5775 - 1 2026-06-17
CSN5730 - 1 2026-04-25
CSN3826 China Southern Airlines 1 2026-05-31
CSN3825 China Southern Airlines 1 2026-05-28
CSN3796 China Southern Airlines 1 2026-07-17

Recent flights last 49

DateFlightRouteTakeoffLandingDuration
2026-07-21 CSN3857 - Jul 21, 23:50 UTCJul 22, 04:45 UTC4h 55m
2026-07-18 CSN3857 - Jul 18, 23:50 UTCJul 19, 12:05 UTC12h 15m
2026-07-17 CSN3796 YIW → CAN Jul 17, 01:15 UTCJul 17, 01:25 UTC10m
2026-07-16 CSN8521 - Jul 16, 04:20 UTCJul 16, 14:00 UTC9h 40m
2026-07-15 CSN8521 - Jul 15, 04:50 UTCJul 16, 04:45 UTC23h 55m
2026-07-14 CSN8521 - Jul 14, 12:35 UTCJul 15, 05:00 UTC16h 24m
2026-07-14 CSN5147 - Jul 14, 03:35 UTCJul 14, 09:00 UTC5h 25m
2026-07-13 CSN8521 - Jul 13, 05:05 UTCJul 14, 03:40 UTC22h 35m
2026-07-13 CSN8521 - Jul 13, 04:25 UTCJul 13, 05:05 UTC40m
2026-07-12 CSN5148 - Jul 12, 11:15 UTCJul 12, 11:30 UTC15m
2026-07-10 CSN8521 - Jul 10, 13:05 UTCJul 11, 08:15 UTC19h 11m
2026-07-10 CSN8521 - Jul 10, 12:40 UTCJul 11, 08:15 UTC19h 35m
2026-07-10 CSN8521 - Jul 10, 08:05 UTCJul 11, 04:10 UTC20h 5m
2026-07-09 CSN5148 - Jul 9, 15:05 UTCJul 10, 13:20 UTC22h 15m
2026-07-09 CSN5147 - Jul 9, 10:50 UTCJul 10, 08:25 UTC21h 35m
2026-07-08 CSN8539 - Jul 8, 07:50 UTCJul 8, 12:40 UTC4h 50m
2026-07-07 CSN3857 - Jul 7, 23:50 UTCJul 8, 05:00 UTC5h 10m
2026-07-06 CSN6742 - Jul 6, 09:00 UTCJul 6, 15:05 UTC6h 5m
2026-07-04 CSN3857 - Jul 4, 00:05 UTCJul 4, 05:00 UTC4h 55m
2026-07-02 CSN3886 - Jul 2, 16:05 UTCJul 2, 16:15 UTC10m
2026-07-02 CSN6704 - Jul 2, 08:20 UTCJul 2, 08:35 UTC15m
2026-07-02 CSN6703 - Jul 2, 00:40 UTCJul 2, 01:00 UTC20m
2026-06-30 CSN3857 - Jun 30, 23:50 UTCJul 1, 11:50 UTC12h 0m
2026-06-27 CSN6704 - Jun 27, 08:29 UTCJun 27, 08:44 UTC15m
2026-06-26 CSN6704 - Jun 26, 09:14 UTCJun 26, 09:30 UTC15m
2026-06-25 CSN3886 - Jun 25, 16:24 UTCJun 25, 17:09 UTC45m
2026-06-21 CSN5929 - Jun 21, 16:14 UTCJun 21, 16:34 UTC20m
2026-06-20 CSN3857 - Jun 20, 23:55 UTCJun 21, 14:40 UTC14h 45m
2026-06-17 CSN5775 - Jun 17, 05:10 UTCJun 17, 09:50 UTC4h 40m
2026-06-15 CSN6417 - Jun 15, 11:45 UTCJun 15, 12:05 UTC20m
2026-06-14 CSN8540 - Jun 14, 06:50 UTCJun 14, 12:05 UTC5h 15m
2026-06-08 CSN8539 - Jun 8, 07:00 UTCJun 8, 11:55 UTC4h 55m
2026-05-31 CSN3826 TAO → WUH May 31, 16:30 UTCMay 31, 16:45 UTC15m
2026-05-29 CSN8540 - May 29, 06:35 UTCMay 29, 12:15 UTC5h 40m
2026-05-28 CSN3825 WUH → TAO May 28, 07:30 UTCMay 28, 07:40 UTC10m
2026-04-25 CSN5730 - Apr 25, 11:10 UTCApr 26, 05:35 UTC18h 25m
2026-04-25 CSN5147 YIW → HAK Apr 25, 08:00 UTCApr 26, 05:35 UTC21h 35m
2026-04-24 CSN5147 YIW → HAK Apr 24, 12:15 UTCApr 25, 08:20 UTC20h 5m
2026-04-24 CSN5147 YIW → HAK Apr 24, 09:00 UTCApr 25, 08:20 UTC23h 20m
2026-04-24 CSN5147 YIW → HAK Apr 24, 03:55 UTCApr 24, 12:25 UTC8h 30m
2026-04-23 CSN5148 HAK → YIW Apr 23, 14:15 UTCApr 24, 12:25 UTC22h 9m
2026-04-23 CSN5147 YIW → HAK Apr 23, 10:30 UTCApr 24, 04:20 UTC17h 50m
2026-04-23 CSN5147 YIW → HAK Apr 23, 06:50 UTCApr 24, 04:20 UTC21h 30m
2026-04-23 CSN3876 SZX → YIW Apr 23, 06:30 UTCApr 24, 04:20 UTC21h 50m
2026-04-23 CSN3875 YIW → SZX Apr 23, 00:45 UTCApr 23, 01:05 UTC20m
2026-04-21 CSN5147 YIW → HAK Apr 21, 08:50 UTCApr 21, 11:55 UTC3h 5m
2026-04-19 CSN3876 SZX → YIW Apr 19, 02:55 UTCApr 19, 03:05 UTC10m
2026-04-19 CSN3875 YIW → SZX Apr 19, 00:40 UTCApr 19, 01:00 UTC20m
2026-04-17 CSN5147 YIW → HAK Apr 17, 08:15 UTCApr 17, 08:35 UTC20m

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-5718 page for operator, model, and routing details .

Mode-S 78099B frequently asked

What is Mode-S code 78099B?
78099B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5718.
Where is Mode-S 78099B registered?
Mode-S code 78099B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78099B broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78099B, octal 36004633, decimal 7,866,779.
What flights does 78099B operate?
Mode-S 78099B has broadcast 19 distinct callsigns, including CSN5147, CSN8521, CSN3857, CSN6704, CSN5148.