Apparatus

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sensors Mode-S transponder

7809E3

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5742 · BOEING 737-800

Hex
7809E3
Octal
36004743
Decimal
7,866,851
Country
CN
Tail
B-5742
Type
B738
No current signal · last broadcast 2h ago
Flights observed
67
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7809E3.

Country allocation

The ICAO 24-bit address 7809E3 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
CSN3875 - 10 2026-07-14
CSN3876 - 7 2026-07-14
CSN6704 - 6 2026-07-18
CSN8540 - 4 2026-06-27
CSN8355 - 4 2026-05-09
CSN6742 China Southern Airlines 3 2026-05-20
CSN8356 - 2 2026-05-09
CSN6703 China Southern Airlines 2 2026-05-22
CSN6195 - 2 2026-05-06
CSN5153 - 2 2026-04-24
CSN3865 - 2 2026-07-01
CSN3857 - 2 2026-04-30
CSN3825 China Southern Airlines 2 2026-05-07
CSN3728 - 2 2026-07-13
CSN8539 - 1 2026-04-20
CSN8521 China Southern Airlines 1 2026-05-15
CSN6050 - 1 2026-07-16
CSN6049 - 1 2026-07-16
CSN5887 - 1 2026-07-02
CSN5154 - 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 CSN6704 - Jul 18, 09:20 UTCJul 18, 09:35 UTC15m
2026-07-18 - - Jul 18, 00:50 UTCJul 18, 01:05 UTC15m
2026-07-16 CSN6050 - Jul 16, 11:20 UTCJul 16, 11:34 UTC15m
2026-07-16 CSN6049 - Jul 16, 06:40 UTCJul 16, 06:55 UTC15m
2026-07-15 CSN6704 - Jul 15, 11:25 UTCJul 15, 11:35 UTC10m
2026-07-14 CSN3304 - Jul 14, 11:05 UTCJul 15, 02:15 UTC15h 9m
2026-07-14 CSN3876 - Jul 14, 03:15 UTCJul 14, 04:10 UTC55m
2026-07-14 CSN3875 - Jul 14, 00:40 UTCJul 14, 01:00 UTC20m
2026-07-13 CSN3795 - Jul 13, 07:01 UTCJul 13, 07:10 UTC10m
2026-07-13 CSN3728 - Jul 13, 03:55 UTCJul 13, 04:45 UTC50m
2026-07-11 CSN3876 - Jul 11, 03:01 UTCJul 11, 03:35 UTC35m
2026-07-11 CSN3875 - Jul 11, 00:30 UTCJul 11, 01:15 UTC45m
2026-07-10 CSN6704 - Jul 10, 08:55 UTCJul 10, 09:05 UTC10m
2026-07-08 CSN3876 - Jul 8, 03:45 UTCJul 8, 04:30 UTC45m
2026-07-08 CSN3875 - Jul 8, 00:15 UTCJul 8, 01:10 UTC55m
2026-07-05 CSN3727 - Jul 5, 00:20 UTCJul 5, 00:30 UTC10m
2026-07-03 CSN3876 - Jul 3, 02:55 UTCJul 3, 03:05 UTC10m
2026-07-03 CSN3875 - Jul 3, 00:40 UTCJul 3, 00:55 UTC15m
2026-07-02 CSN5887 - Jul 2, 09:40 UTCJul 2, 14:05 UTC4h 25m
2026-07-01 CSN3865 - Jul 1, 01:00 UTCJul 1, 06:10 UTC5h 10m
2026-06-27 CSN8540 - Jun 27, 08:10 UTCJun 27, 13:09 UTC5h 0m
2026-06-25 CSN3974 - Jun 25, 18:39 UTCJun 25, 18:55 UTC15m
2026-06-25 CSN3973 - Jun 25, 16:59 UTCJun 25, 17:20 UTC20m
2026-06-25 CSN3876 - Jun 25, 03:29 UTCJun 25, 03:44 UTC15m
2026-06-25 CSN3875 - Jun 25, 00:09 UTCJun 25, 00:59 UTC50m
2026-06-24 CSN3875 - Jun 24, 03:29 UTCJun 25, 00:59 UTC21h 30m
2026-06-23 CSN3728 YIW → CAN Jun 23, 01:00 UTCJun 23, 04:14 UTC3h 15m
2026-06-22 - - Jun 22, 09:14 UTCJun 22, 09:24 UTC10m
2026-06-22 CSN3875 - Jun 22, 00:40 UTCJun 22, 01:00 UTC20m
2026-06-20 CSN3876 - Jun 20, 02:54 UTCJun 20, 03:04 UTC10m
2026-06-20 CSN3875 - Jun 20, 00:39 UTCJun 20, 00:59 UTC20m
2026-06-17 CSN5147 - Jun 17, 08:05 UTCJun 17, 11:25 UTC3h 20m
2026-06-16 CSN6704 - Jun 16, 09:30 UTCJun 16, 09:45 UTC15m
2026-05-27 CSN3895 - May 27, 23:50 UTCMay 28, 00:10 UTC20m
2026-05-26 - - May 26, 00:14 UTCMay 26, 00:24 UTC10m
2026-05-23 CSN3875 YIW → SZX May 23, 01:00 UTCMay 23, 01:10 UTC10m
2026-05-22 CSN6704 ZUH → YIW May 22, 09:10 UTCMay 22, 09:20 UTC10m
2026-05-22 CSN6703 YIW → ZUH May 22, 02:50 UTCMay 22, 03:15 UTC25m
2026-05-20 CSN6742 CGQ → YIW May 20, 09:00 UTCMay 20, 13:05 UTC4h 5m
2026-05-15 CSN8521 SHE → YIW May 15, 03:45 UTCMay 15, 04:25 UTC40m
2026-05-09 CSN8356 - May 9, 05:30 UTCMay 9, 07:45 UTC2h 15m
2026-05-09 CSN8355 - May 9, 01:30 UTCMay 9, 03:55 UTC2h 25m
2026-05-08 CSN8355 - May 8, 07:24 UTCMay 9, 03:55 UTC20h 30m
2026-05-07 CSN3825 WUH → TAO May 7, 09:05 UTCMay 8, 07:29 UTC22h 24m
2026-05-06 CSN6195 - May 6, 23:50 UTCMay 7, 09:05 UTC9h 15m
2026-04-30 CSN8540 - Apr 30, 11:35 UTCMay 1, 04:05 UTC16h 30m
2026-04-30 CSN8540 - Apr 30, 06:50 UTCMay 1, 04:05 UTC21h 15m
2026-04-30 CSN8540 - Apr 30, 04:50 UTCMay 1, 04:05 UTC23h 15m
2026-04-30 CSN3857 - Apr 30, 00:00 UTCApr 30, 11:40 UTC11h 40m
2026-04-28 CSN6195 - Apr 28, 23:40 UTCApr 29, 03:34 UTC3h 55m

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-5742 page for operator, model, and routing details .

Mode-S 7809E3 frequently asked

What is Mode-S code 7809E3?
7809E3 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5742.
Where is Mode-S 7809E3 registered?
Mode-S code 7809E3 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7809E3 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7809E3, octal 36004743, decimal 7,866,851.
What flights does 7809E3 operate?
Mode-S 7809E3 has broadcast 20 distinct callsigns, including CSN3875, CSN3876, CSN6704, CSN8540, CSN8355.