Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

78051B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-5421 · BOEING 737-800

Hex
78051B
Octal
36002433
Decimal
7,865,627
Country
CN
Tail
B-5421
Type
B738
No current signal · last broadcast 7h ago
Flights observed
84
Distinct callsigns
15
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 78051B.

Country allocation

The ICAO 24-bit address 78051B 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 15 distinct

Callsign Airline Flights Last seen
CSN6050 China Southern Airlines 31 2026-05-29
CSN6049 China Southern Airlines 26 2026-05-29
CSN6748 China Southern Airlines 10 2026-05-16
CSN5052 China Southern Airlines 3 2026-05-29
CSN5051 China Southern Airlines 2 2026-05-29
CSN3771 China Southern Airlines 2 2026-05-20
CSN8701 - 1 2026-05-18
CSN8262 - 1 2026-04-23
CSN6747 China Southern Airlines 1 2026-04-19
CSN6738 China Southern Airlines 1 2026-04-17
CSN3796 China Southern Airlines 1 2026-05-05
CSN3767 China Southern Airlines 1 2026-05-19
CSN3733 China Southern Airlines 1 2026-05-21
CSN3536 China Southern Airlines 1 2026-04-23
CSN3493 China Southern Airlines 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CSN5052 MNL → CAN May 29, 21:35 UTCMay 29, 22:10 UTC35m
2026-05-29 CSN5052 MNL → CAN May 29, 20:15 UTCMay 29, 20:45 UTC30m
2026-05-29 CSN5051 YYZ → CAN May 29, 16:45 UTCMay 29, 18:25 UTC1h 40m
2026-05-29 CSN6050 CXR → CAN May 29, 10:35 UTCMay 29, 10:55 UTC20m
2026-05-29 CSN6049 CAN → CXR May 29, 06:10 UTCMay 29, 06:20 UTC10m
2026-05-28 CSN6050 CXR → CAN May 28, 10:45 UTCMay 28, 11:05 UTC20m
2026-05-27 CSN6050 CXR → CAN May 27, 10:40 UTCMay 27, 10:55 UTC15m
2026-05-27 CSN6049 CAN → CXR May 27, 06:09 UTCMay 27, 06:20 UTC10m
2026-05-25 CSN6050 CXR → CAN May 25, 10:40 UTCMay 25, 11:00 UTC20m
2026-05-25 CSN6049 CAN → CXR May 25, 06:00 UTCMay 25, 06:10 UTC10m
2026-05-24 CSN6050 CXR → CAN May 24, 10:35 UTCMay 24, 10:55 UTC20m
2026-05-24 CSN6049 CAN → CXR May 24, 05:50 UTCMay 24, 06:00 UTC10m
2026-05-23 CSN6050 CXR → CAN May 23, 10:35 UTCMay 23, 11:00 UTC25m
2026-05-21 CSN5052 MNL → CAN May 21, 20:20 UTCMay 21, 22:05 UTC1h 45m
2026-05-21 CSN5051 YYZ → CAN May 21, 16:45 UTCMay 21, 18:25 UTC1h 40m
2026-05-21 CSN3733 ZUH → PEK May 21, 04:10 UTCMay 21, 04:25 UTC15m
2026-05-20 CSN3771 ZUH → CGO May 20, 05:50 UTCMay 20, 06:05 UTC15m
2026-05-20 CSN3771 ZUH → CGO May 20, 01:30 UTCMay 20, 01:40 UTC10m
2026-05-19 CSN3767 ZUH → TFU May 19, 01:10 UTCMay 19, 01:20 UTC10m
2026-05-18 CSN8701 - May 18, 11:05 UTCMay 18, 11:15 UTC10m
2026-05-17 CSN6049 CAN → CXR May 17, 06:05 UTCMay 17, 06:15 UTC10m
2026-05-16 CSN6748 CAN → SYX May 16, 22:40 UTCMay 16, 22:50 UTC10m
2026-05-16 CSN6050 CXR → CAN May 16, 10:55 UTCMay 16, 11:11 UTC15m
2026-05-16 CSN6049 CAN → CXR May 16, 06:35 UTCMay 16, 06:45 UTC10m
2026-05-14 CSN6049 CAN → CXR May 14, 22:55 UTCMay 15, 06:30 UTC7h 35m
2026-05-14 CSN6050 CXR → CAN May 14, 11:40 UTCMay 14, 11:55 UTC15m
2026-05-14 CSN6049 CAN → CXR May 14, 06:55 UTCMay 14, 07:20 UTC25m
2026-05-13 CSN6050 CXR → CAN May 13, 11:45 UTCMay 13, 12:25 UTC40m
2026-05-12 CSN6748 CAN → SYX May 12, 22:40 UTCMay 12, 22:50 UTC10m
2026-05-12 CSN6050 CXR → CAN May 12, 10:35 UTCMay 12, 10:55 UTC20m
2026-05-11 CSN6050 CXR → CAN May 11, 10:45 UTCMay 11, 11:05 UTC20m
2026-05-11 CSN6049 CAN → CXR May 11, 06:15 UTCMay 11, 06:25 UTC10m
2026-05-10 CSN6050 CXR → CAN May 10, 10:40 UTCMay 10, 11:10 UTC30m
2026-05-10 CSN6049 CAN → CXR May 10, 06:15 UTCMay 10, 06:25 UTC10m
2026-05-08 CSN6050 CXR → CAN May 8, 10:35 UTCMay 8, 11:14 UTC40m
2026-05-08 CSN6049 CAN → CXR May 8, 06:04 UTCMay 8, 06:14 UTC10m
2026-05-06 CSN6050 CXR → CAN May 6, 10:35 UTCMay 6, 11:05 UTC30m
2026-05-06 CSN6049 CAN → CXR May 6, 06:00 UTCMay 6, 06:10 UTC10m
2026-05-06 - - May 6, 03:20 UTCMay 6, 03:30 UTC10m
2026-05-05 CSN6050 CXR → CAN May 5, 10:45 UTCMay 5, 11:20 UTC35m
2026-05-05 CSN6049 CAN → CXR May 5, 06:00 UTCMay 5, 06:15 UTC15m
2026-05-05 CSN3796 YIW → CAN May 5, 01:35 UTCMay 5, 01:45 UTC10m
2026-05-04 CSN6050 CXR → CAN May 4, 10:45 UTCMay 4, 11:25 UTC40m
2026-05-04 CSN6049 CAN → CXR May 4, 06:10 UTCMay 4, 06:20 UTC10m
2026-05-01 CSN6050 CXR → CAN May 1, 10:50 UTCMay 1, 11:15 UTC25m
2026-04-30 CSN6050 CXR → CAN Apr 30, 10:45 UTCApr 30, 11:20 UTC35m
2026-04-30 CSN6049 CAN → CXR Apr 30, 06:10 UTCApr 30, 06:25 UTC15m
2026-04-29 CSN6748 CAN → SYX Apr 29, 23:00 UTCApr 29, 23:10 UTC9m
2026-04-28 CSN6050 CXR → CAN Apr 28, 10:20 UTCApr 28, 11:15 UTC55m
2026-04-27 CSN6050 CXR → CAN Apr 27, 10:35 UTCApr 27, 10:55 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-5421 page for operator, model, and routing details .

Mode-S 78051B frequently asked

What is Mode-S code 78051B?
78051B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-5421.
Where is Mode-S 78051B registered?
Mode-S code 78051B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78051B broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78051B, octal 36002433, decimal 7,865,627.
What flights does 78051B operate?
Mode-S 78051B has broadcast 15 distinct callsigns, including CSN6050, CSN6049, CSN6748, CSN5052, CSN5051.