Apparatus

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sensors Mode-S transponder

7800C2

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-6657 · AIRBUS A-321

Hex
7800C2
Octal
36000302
Decimal
7,864,514
Country
CN
Tail
B-6657
Type
A321
No current signal · last broadcast Jul 26, 11:10 UTC
Flights observed
327
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 11:10 UTC

Last known position

Most recent position reported by Mode-S 7800C2.

Country allocation

The ICAO 24-bit address 7800C2 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
CSN8324 China Southern Airlines 14 2026-07-25
CSN8323 China Southern Airlines 13 2026-07-25
CSN8076 China Southern Airlines 13 2026-07-26
CSN8075 China Southern Airlines 11 2026-07-22
CSN3191 - 11 2026-07-20
CSN8466 - 10 2026-06-19
CSN8465 - 9 2026-06-19
CSN3192 - 7 2026-07-21
CSN3188 - 6 2026-07-18
CSN8283 - 5 2026-07-11
CSN3151 China Southern Airlines 5 2026-05-28
CSN8504 China Southern Airlines 4 2026-07-24
CSN6621 China Southern Airlines 4 2026-07-19
CSN6386 - 4 2026-07-10
CSN3827 - 4 2026-06-30
CSN8965 - 3 2026-06-29
CSN8588 - 3 2026-07-06
CSN8553 - 3 2026-07-14
CSN8503 - 3 2026-07-18
CSN8469 - 3 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CSN3173 SZX → PKX Jul 26, 10:55 UTCJul 26, 11:10 UTC15m
2026-07-26 CSN8076 BKK → SZX Jul 26, 06:20 UTCJul 26, 07:55 UTC1h 36m
2026-07-25 CSN8157 SZX → BKK Jul 25, 15:25 UTCJul 25, 17:35 UTC2h 10m
2026-07-25 CSN8324 BKK → SZX Jul 25, 13:25 UTCJul 25, 13:40 UTC15m
2026-07-25 CSN8324 BKK → SZX Jul 25, 11:00 UTCJul 25, 12:30 UTC1h 30m
2026-07-25 CSN8323 SZX → BKK Jul 25, 07:55 UTCJul 25, 09:25 UTC1h 30m
2026-07-25 CSN8323 SZX → BKK Jul 25, 07:10 UTCJul 25, 07:20 UTC10m
2026-07-25 CSN6970 NAO → SZX Jul 25, 05:30 UTCJul 25, 05:40 UTC10m
2026-07-25 CSN6969 SZX → NAO Jul 25, 00:55 UTCJul 25, 01:05 UTC10m
2026-07-24 CSN8700 NKG → SZX Jul 24, 16:15 UTCJul 24, 16:55 UTC40m
2026-07-24 CSN8699 SZX → NKG Jul 24, 10:25 UTCJul 24, 10:35 UTC10m
2026-07-24 CSN8712 HGH → SZX Jul 24, 07:00 UTCJul 24, 07:20 UTC20m
2026-07-24 CSN8711 SZX → HGH Jul 24, 02:15 UTCJul 24, 02:25 UTC10m
2026-07-24 CSN8504 NGB → SZX Jul 24, 00:35 UTCJul 24, 00:45 UTC10m
2026-07-23 CSN3584 KHN → SZX Jul 23, 12:45 UTCJul 23, 13:15 UTC30m
2026-07-23 CSN3583 SZX → KHN Jul 23, 06:25 UTCJul 23, 06:40 UTC15m
2026-07-23 CSN6444 HAK → SZX Jul 23, 04:35 UTCJul 23, 04:45 UTC10m
2026-07-23 CSN6443 SZX → HAK Jul 23, 01:25 UTCJul 23, 01:35 UTC10m
2026-07-22 CSN8324 BKK → SZX Jul 22, 16:10 UTCJul 22, 16:30 UTC20m
2026-07-22 CSN8324 BKK → SZX Jul 22, 14:10 UTCJul 22, 14:40 UTC30m
2026-07-22 CSN8323 SZX → BKK Jul 22, 11:10 UTCJul 22, 12:55 UTC1h 45m
2026-07-22 CSN8075 SZX → BKK Jul 22, 02:00 UTCJul 22, 04:25 UTC2h 25m
2026-07-21 CSN8324 BKK → SZX Jul 21, 12:55 UTCJul 21, 13:10 UTC15m
2026-07-21 CSN8324 BKK → SZX Jul 21, 10:45 UTCJul 21, 12:20 UTC1h 35m
2026-07-21 CSN8323 SZX → BKK Jul 21, 08:40 UTCJul 21, 09:05 UTC25m
2026-07-21 CSN8323 SZX → BKK Jul 21, 06:50 UTCJul 21, 07:00 UTC10m
2026-07-21 CSN3192 - Jul 21, 05:05 UTCJul 21, 05:15 UTC10m
2026-07-20 CSN3191 - Jul 20, 09:50 UTCJul 20, 10:00 UTC10m
2026-07-20 CSN8736 - Jul 20, 07:30 UTCJul 20, 08:40 UTC1h 10m
2026-07-20 CSN8735 - Jul 20, 01:05 UTCJul 20, 01:20 UTC15m
2026-07-19 CSN3433 - Jul 19, 10:25 UTCJul 19, 10:35 UTC10m
2026-07-19 CSN6622 XIY → SZX Jul 19, 08:25 UTCJul 19, 08:35 UTC10m
2026-07-19 CSN6621 SZX → XIY Jul 19, 02:10 UTCJul 19, 02:25 UTC15m
2026-07-18 CSN8504 NGB → SZX Jul 18, 23:55 UTCJul 19, 00:10 UTC15m
2026-07-18 CSN8503 - Jul 18, 15:05 UTCJul 18, 15:20 UTC15m
2026-07-18 CSN3188 - Jul 18, 12:50 UTCJul 18, 13:00 UTC10m
2026-07-17 CSN3191 - Jul 17, 10:05 UTCJul 17, 10:15 UTC10m
2026-07-17 CSN8076 - Jul 17, 06:10 UTCJul 17, 06:25 UTC15m
2026-07-17 CSN8075 - Jul 17, 04:25 UTCJul 17, 04:39 UTC15m
2026-07-17 CSN8075 - Jul 17, 02:25 UTCJul 17, 02:34 UTC10m
2026-07-16 CSN3153 - Jul 16, 07:05 UTCJul 16, 07:20 UTC15m
2026-07-16 CSN3192 - Jul 16, 05:30 UTCJul 16, 05:40 UTC10m
2026-07-15 CSN3191 - Jul 15, 12:00 UTCJul 15, 12:10 UTC10m
2026-07-15 CSN3160 - Jul 15, 09:35 UTCJul 15, 10:05 UTC30m
2026-07-15 CSN3159 - Jul 15, 03:05 UTCJul 15, 03:15 UTC10m
2026-07-14 CSN8553 - Jul 14, 13:10 UTCJul 14, 13:30 UTC20m
2026-07-14 - - Jul 14, 10:40 UTCJul 14, 10:50 UTC10m
2026-07-14 CSN3455 - Jul 14, 05:40 UTCJul 14, 05:55 UTC15m
2026-07-13 CSN3191 - Jul 13, 09:40 UTCJul 13, 09:55 UTC15m
2026-07-13 CSN8076 - Jul 13, 07:45 UTCJul 13, 07:55 UTC10m

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-6657 page for operator, model, and routing details .

Mode-S 7800C2 frequently asked

What is Mode-S code 7800C2?
7800C2 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-6657.
Where is Mode-S 7800C2 registered?
Mode-S code 7800C2 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7800C2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7800C2, octal 36000302, decimal 7,864,514.
What flights does 7800C2 operate?
Mode-S 7800C2 has broadcast 20 distinct callsigns, including CSN8324, CSN8323, CSN8076, CSN8075, CSN3191.