Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

780D51

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1626 · AIRBUS A-321

Hex
780D51
Octal
36006521
Decimal
7,867,729
Country
CN
Tail
B-1626
Type
A321
No current signal · last broadcast 2d ago
Flights observed
77
Distinct callsigns
20
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 780D51.

Country allocation

The ICAO 24-bit address 780D51 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
CSN8711 China Southern Airlines 6 2026-05-22
CSN3964 China Southern Airlines 5 2026-05-21
CSN8712 China Southern Airlines 4 2026-05-20
CSN3560 China Southern Airlines 3 2026-05-07
CSN8819 China Southern Airlines 2 2026-05-19
CSN6923 China Southern Airlines 2 2026-05-18
CSN5102 China Southern Airlines 2 2026-05-18
CSN5101 China Southern Airlines 2 2026-05-18
CSN3963 China Southern Airlines 2 2026-05-20
CSN3559 China Southern Airlines 2 2026-05-07
CSN340 China Southern Airlines 2 2026-06-01
CSN8758 China Southern Airlines 1 2026-05-05
CSN8757 China Southern Airlines 1 2026-05-05
CSN8554 China Southern Airlines 1 2026-05-22
CSN8553 China Southern Airlines 1 2026-05-21
CSN8214 China Southern Airlines 1 2026-04-29
CSN8083 China Southern Airlines 1 2026-05-15
CSN8076 China Southern Airlines 1 2026-05-16
CSN8075 China Southern Airlines 1 2026-05-16
CSN6924 China Southern Airlines 1 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CSN5899 CAN → TAO Jun 2, 07:05 UTCJun 2, 07:15 UTC10m
2026-06-01 CSN340 ICN → CAN Jun 1, 03:50 UTCJun 1, 04:00 UTC10m
2026-06-01 CSN340 ICN → CAN Jun 1, 00:55 UTCJun 1, 01:25 UTC30m
2026-05-31 CSN339 CAN → ICN May 31, 12:00 UTCMay 31, 12:35 UTC35m
2026-05-30 CSN3716 TAO → CAN May 30, 02:45 UTCMay 30, 03:05 UTC20m
2026-05-27 CSN6064 HKT → CAN May 27, 06:49 UTCMay 27, 12:05 UTC5h 16m
2026-05-22 CSN8711 SZX → HGH May 22, 02:25 UTCMay 22, 02:40 UTC15m
2026-05-22 CSN8554 LYA → SZX May 22, 00:20 UTCMay 22, 00:35 UTC15m
2026-05-21 CSN8553 SZX → LYA May 21, 13:35 UTCMay 21, 13:45 UTC10m
2026-05-21 CSN6621 SZX → XIY May 21, 05:40 UTCMay 21, 06:00 UTC20m
2026-05-21 CSN3964 TAO → SZX May 21, 00:40 UTCMay 21, 00:55 UTC15m
2026-05-20 CSN3963 SZX → TAO May 20, 09:55 UTCMay 20, 10:05 UTC10m
2026-05-20 CSN8712 HGH → SZX May 20, 07:50 UTCMay 20, 08:15 UTC25m
2026-05-20 CSN8711 SZX → HGH May 20, 02:35 UTCMay 20, 02:45 UTC10m
2026-05-19 CSN8819 SZX → KMG May 19, 07:35 UTCMay 19, 07:55 UTC20m
2026-05-19 CSN3465 SZX → CKG May 19, 00:25 UTCMay 19, 00:40 UTC15m
2026-05-18 CSN6923 SZX → KMG May 18, 10:45 UTCMay 18, 11:00 UTC15m
2026-05-18 CSN5102 YIW → SZX May 18, 06:35 UTCMay 18, 07:00 UTC25m
2026-05-18 CSN5101 SZX → YIW May 18, 02:30 UTCMay 18, 03:15 UTC45m
2026-05-17 CSN3226 XIY → SZX May 17, 16:05 UTCMay 17, 16:15 UTC10m
2026-05-16 CSN3171 SZX → PKX May 16, 23:45 UTCMay 17, 00:00 UTC15m
2026-05-16 CSN6548 HGH → SZX May 16, 15:05 UTCMay 16, 15:55 UTC50m
2026-05-16 CSN6547 SZX → HGH May 16, 10:40 UTCMay 16, 10:50 UTC10m
2026-05-16 CSN8076 BKK → SZX May 16, 05:51 UTCMay 16, 06:31 UTC40m
2026-05-16 CSN8075 SZX → BKK May 16, 03:00 UTCMay 16, 03:50 UTC50m
2026-05-15 CSN3670 NKG → SZX May 15, 18:15 UTCMay 15, 18:40 UTC25m
2026-05-15 CSN8083 SZX → HAN May 15, 05:10 UTCMay 15, 05:25 UTC15m
2026-05-14 CSN6443 SZX → HAK May 14, 22:55 UTCMay 14, 23:05 UTC10m
2026-05-14 CSN3159 SZX → PEK May 14, 02:50 UTCMay 14, 03:05 UTC15m
2026-05-13 CSN6498 SYX → SZX May 13, 16:05 UTCMay 13, 16:25 UTC20m
2026-05-13 CSN6497 SZX → SYX May 13, 12:35 UTCMay 13, 12:50 UTC15m
2026-05-13 CSN8712 HGH → SZX May 13, 07:30 UTCMay 13, 07:45 UTC15m
2026-05-10 CSN3864 HGH → CAN May 10, 07:50 UTCMay 10, 08:05 UTC15m
2026-05-10 CSN8711 SZX → HGH May 10, 02:10 UTCMay 10, 02:20 UTC10m
2026-05-09 CSN3210 WUX → SZX May 9, 14:05 UTCMay 9, 15:10 UTC1h 5m
2026-05-09 CSN3209 SZX → WUX May 9, 09:25 UTCMay 9, 09:35 UTC10m
2026-05-09 CSN3565 SZX → HFE May 9, 01:35 UTCMay 9, 01:45 UTC10m
2026-05-08 CSN3964 TAO → SZX May 8, 16:20 UTCMay 8, 16:45 UTC25m
2026-05-08 CSN3964 TAO → SZX May 8, 14:55 UTCMay 8, 15:40 UTC45m
2026-05-08 CSN3963 SZX → TAO May 8, 09:19 UTCMay 8, 09:30 UTC10m
2026-05-08 CSN8712 HGH → SZX May 8, 07:24 UTCMay 8, 07:39 UTC15m
2026-05-08 CSN8711 SZX → HGH May 8, 02:55 UTCMay 8, 03:04 UTC10m
2026-05-07 CSN8819 SZX → KMG May 7, 07:15 UTCMay 7, 07:30 UTC15m
2026-05-07 CSN3560 NKG → SZX May 7, 05:30 UTCMay 7, 05:40 UTC10m
2026-05-07 CSN3559 SZX → NKG May 7, 00:25 UTCMay 7, 00:35 UTC10m
2026-05-06 CSN3827 SZX → NKG May 6, 07:15 UTCMay 6, 07:25 UTC10m
2026-05-06 CSN3560 NKG → SZX May 6, 05:20 UTCMay 6, 05:45 UTC25m
2026-05-06 CSN3559 SZX → NKG May 6, 00:40 UTCMay 6, 00:50 UTC10m
2026-05-05 CSN6924 KMG → SZX May 5, 16:06 UTCMay 5, 16:15 UTC10m
2026-05-05 CSN6923 SZX → KMG May 5, 10:45 UTCMay 5, 11:05 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-1626 page for operator, model, and routing details .

Mode-S 780D51 frequently asked

What is Mode-S code 780D51?
780D51 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1626.
Where is Mode-S 780D51 registered?
Mode-S code 780D51 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780D51 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780D51, octal 36006521, decimal 7,867,729.
What flights does 780D51 operate?
Mode-S 780D51 has broadcast 20 distinct callsigns, including CSN8711, CSN3964, CSN8712, CSN3560, CSN8819.