Apparatus

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sensors Mode-S transponder

7800B2

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-2418 · AIRBUS A-321

Hex
7800B2
Octal
36000262
Decimal
7,864,498
Country
CN
Tail
B-2418
Type
A321
No current signal · last broadcast Jul 25, 08:50 UTC
Flights observed
115
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 08:50 UTC

Last known position

Most recent position reported by Mode-S 7800B2.

Country allocation

The ICAO 24-bit address 7800B2 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
CSN8099 China Southern Airlines 7 2026-07-25
CSN8711 China Southern Airlines 5 2026-06-10
CSN8100 China Southern Airlines 5 2026-07-25
CSN3964 China Southern Airlines 5 2026-06-07
CSN8712 China Southern Airlines 4 2026-06-07
CSN3963 China Southern Airlines 3 2026-06-05
CSN3584 China Southern Airlines 3 2026-06-04
CSN3583 China Southern Airlines 3 2026-06-04
CSN3560 China Southern Airlines 3 2026-05-12
CSN3236 China Southern Airlines 3 2026-04-19
CSN6851 - 2 2026-07-13
CSN5842 China Southern Airlines 2 2026-05-10
CSN5841 China Southern Airlines 2 2026-05-10
CSN5820 China Southern Airlines 2 2026-06-09
CSN5819 China Southern Airlines 2 2026-06-09
CSN3864 China Southern Airlines 2 2026-05-01
CSN364 China Southern Airlines 2 2026-07-23
CSN363 China Southern Airlines 2 2026-07-23
CSN3559 China Southern Airlines 2 2026-05-09
CSN3465 China Southern Airlines 2 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CSN8100 BKK → CAN Jul 25, 07:15 UTCJul 25, 08:50 UTC1h 35m
2026-07-25 CSN8099 CAN → BKK Jul 25, 03:15 UTCJul 25, 05:10 UTC1h 55m
2026-07-24 CSN3806 - Jul 24, 13:55 UTCJul 24, 14:20 UTC25m
2026-07-24 CSN8778 YNT → CAN Jul 24, 07:35 UTCJul 24, 07:45 UTC10m
2026-07-23 CSN364 BKK → CAN Jul 23, 12:45 UTCJul 24, 01:30 UTC12h 45m
2026-07-23 CSN363 CAN → BKK Jul 23, 09:15 UTCJul 23, 11:15 UTC2h 0m
2026-07-21 CSN3415 CAN → CKG Jul 21, 06:05 UTCJul 21, 06:55 UTC50m
2026-07-20 CSN3136 TSN → CAN Jul 20, 18:35 UTCJul 20, 18:50 UTC15m
2026-07-19 CSN3708 TNA → CAN Jul 19, 17:30 UTCJul 19, 17:45 UTC15m
2026-07-18 CSN8777 CAN → YNT Jul 18, 12:05 UTCJul 19, 01:45 UTC13h 40m
2026-07-17 CSN8100 - Jul 17, 07:00 UTCJul 17, 07:20 UTC20m
2026-07-17 CSN8099 - Jul 17, 05:04 UTCJul 17, 05:15 UTC10m
2026-07-17 CSN8099 - Jul 17, 03:10 UTCJul 17, 03:20 UTC10m
2026-07-17 - - Jul 17, 00:45 UTCJul 17, 00:55 UTC10m
2026-07-15 CSN364 - Jul 15, 12:30 UTCJul 15, 12:40 UTC10m
2026-07-15 CSN363 - Jul 15, 10:25 UTCJul 15, 10:45 UTC20m
2026-07-13 CSN6851 - Jul 13, 09:45 UTCJul 13, 10:00 UTC15m
2026-07-13 CSN6851 - Jul 13, 03:30 UTCJul 13, 07:35 UTC4h 5m
2026-07-12 CSN3727 - Jul 12, 02:25 UTCJul 12, 02:35 UTC10m
2026-07-11 CSN8100 - Jul 11, 06:45 UTCJul 11, 06:55 UTC10m
2026-07-11 CSN8099 - Jul 11, 04:55 UTCJul 11, 05:10 UTC15m
2026-07-11 CSN8099 - Jul 11, 02:55 UTCJul 11, 03:40 UTC45m
2026-07-09 CSN3497 - Jul 9, 23:55 UTCJul 10, 00:10 UTC15m
2026-07-06 CSN3144 - Jul 6, 14:20 UTCJul 6, 14:40 UTC20m
2026-07-06 CSN6341 - Jul 6, 01:05 UTCJul 6, 01:20 UTC15m
2026-07-05 CSN3873 - Jul 5, 05:10 UTCJul 5, 05:20 UTC10m
2026-07-04 CSN8100 - Jul 4, 08:20 UTCJul 4, 09:40 UTC1h 20m
2026-07-04 CSN8099 - Jul 4, 04:50 UTCJul 4, 07:15 UTC2h 25m
2026-07-01 - - Jul 1, 17:10 UTCJul 1, 17:20 UTC10m
2026-07-01 CSN3672 - Jul 1, 01:25 UTCJul 1, 01:35 UTC10m
2026-06-30 - - Jun 30, 10:50 UTCJun 30, 11:00 UTC10m
2026-06-28 CSN3493 - Jun 28, 02:54 UTCJun 28, 03:05 UTC10m
2026-06-25 CSN3878 - Jun 25, 12:30 UTCJun 25, 13:35 UTC1h 5m
2026-06-25 CSN3877 - Jun 25, 06:50 UTCJun 25, 07:15 UTC25m
2026-06-25 CSN3770 - Jun 25, 01:50 UTCJun 25, 02:59 UTC1h 10m
2026-06-24 CSN3449 - Jun 24, 07:40 UTCJun 24, 08:20 UTC40m
2026-06-21 CSN3899 - Jun 21, 09:20 UTCJun 21, 09:29 UTC10m
2026-06-18 CSN3449 - Jun 18, 12:05 UTCJun 18, 12:55 UTC50m
2026-06-16 CSN8100 - Jun 16, 08:35 UTCJun 16, 10:04 UTC1h 30m
2026-06-16 CSN8099 - Jun 16, 05:00 UTCJun 16, 07:09 UTC2h 10m
2026-06-14 CSN3114 PEK → CAN Jun 14, 16:35 UTCJun 14, 16:50 UTC15m
2026-06-10 CSN8711 SZX → HGH Jun 10, 02:25 UTCJun 10, 02:35 UTC10m
2026-06-09 CSN5820 TSN → SZX Jun 9, 09:35 UTCJun 9, 09:55 UTC20m
2026-06-09 CSN5819 SZX → TSN Jun 9, 02:55 UTCJun 9, 03:15 UTC20m
2026-06-08 CSN3588 SHA → SZX Jun 8, 17:45 UTCJun 8, 18:10 UTC25m
2026-06-08 CSN3587 SZX → SHA Jun 8, 12:50 UTCJun 8, 13:05 UTC15m
2026-06-08 CSN8736 TAO → SZX Jun 8, 08:30 UTCJun 8, 09:55 UTC1h 25m
2026-06-08 CSN8735 SZX → TAO Jun 8, 01:05 UTCJun 8, 01:15 UTC10m
2026-06-07 CSN3964 TAO → SZX Jun 7, 16:50 UTCJun 7, 18:20 UTC1h 30m
2026-06-07 CSN8712 HGH → SZX Jun 7, 08:30 UTCJun 7, 08:50 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-2418 page for operator, model, and routing details .

Mode-S 7800B2 frequently asked

What is Mode-S code 7800B2?
7800B2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-2418.
Where is Mode-S 7800B2 registered?
Mode-S code 7800B2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7800B2 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 08:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7800B2, octal 36000262, decimal 7,864,498.
What flights does 7800B2 operate?
Mode-S 7800B2 has broadcast 20 distinct callsigns, including CSN8099, CSN8711, CSN8100, CSN3964, CSN8712.