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 3h ago
Flights observed
161
Distinct callsigns
20
Country
CN
Last broadcast
3h 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 20 distinct

Callsign Airline Flights Last seen
CSN6050 - 55 2026-07-13
CSN6049 - 44 2026-07-14
CSN6748 China Southern Airlines 15 2026-06-25
CSN5052 - 7 2026-07-02
CSN3932 - 5 2026-07-14
CSN5051 - 4 2026-07-02
CSN8476 - 3 2026-06-19
CSN8262 - 3 2026-06-17
CSN3792 - 2 2026-07-09
CSN3791 - 2 2026-07-09
CSN3771 China Southern Airlines 2 2026-05-20
CSN3536 China Southern Airlines 2 2026-06-25
CSN8701 - 1 2026-05-18
CSN8475 China Southern Airlines 1 2026-06-02
CSN6747 China Southern Airlines 1 2026-04-19
CSN6738 China Southern Airlines 1 2026-04-17
CSN6632 - 1 2026-06-14
CSN3882 - 1 2026-07-05
CSN3814 China Southern Airlines 1 2026-06-12
CSN3809 - 1 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CSN6049 - Jul 14, 07:00 UTCJul 14, 07:10 UTC10m
2026-07-14 CSN3932 - Jul 14, 04:45 UTCJul 14, 04:55 UTC10m
2026-07-13 CSN6050 - Jul 13, 10:35 UTCJul 13, 11:05 UTC30m
2026-07-13 CSN6049 - Jul 13, 06:10 UTCJul 13, 06:25 UTC15m
2026-07-13 CSN3932 - Jul 13, 04:20 UTCJul 13, 04:30 UTC10m
2026-07-12 CSN6050 - Jul 12, 10:35 UTCJul 12, 10:55 UTC20m
2026-07-12 CSN6049 - Jul 12, 05:55 UTCJul 12, 06:05 UTC10m
2026-07-11 CSN6050 - Jul 11, 10:40 UTCJul 11, 11:10 UTC30m
2026-07-11 CSN6049 - Jul 11, 06:01 UTCJul 11, 06:10 UTC10m
2026-07-11 CSN3932 - Jul 11, 04:10 UTCJul 11, 04:20 UTC10m
2026-07-10 CSN6050 - Jul 10, 11:10 UTCJul 10, 11:45 UTC35m
2026-07-10 CSN6049 - Jul 10, 06:35 UTCJul 10, 06:45 UTC10m
2026-07-10 CSN3932 - Jul 10, 04:30 UTCJul 10, 04:45 UTC15m
2026-07-09 CSN3792 - Jul 9, 10:50 UTCJul 9, 11:05 UTC15m
2026-07-09 CSN3791 - Jul 9, 02:00 UTCJul 9, 02:20 UTC20m
2026-07-08 CSN3729 - Jul 8, 09:30 UTCJul 8, 09:40 UTC10m
2026-07-07 CSN3690 - Jul 7, 07:30 UTCJul 7, 09:00 UTC1h 30m
2026-07-07 CSN3689 - Jul 7, 01:30 UTCJul 7, 01:45 UTC15m
2026-07-06 CSN3792 - Jul 6, 10:40 UTCJul 6, 11:00 UTC20m
2026-07-06 CSN3791 - Jul 6, 03:00 UTCJul 6, 03:10 UTC10m
2026-07-05 CSN3882 - Jul 5, 14:30 UTCJul 5, 14:50 UTC20m
2026-07-04 CSN6050 - Jul 4, 15:45 UTCJul 4, 16:05 UTC20m
2026-07-04 CSN6049 - Jul 4, 11:05 UTCJul 4, 11:25 UTC20m
2026-07-02 CSN5052 - Jul 2, 21:10 UTCJul 2, 21:25 UTC15m
2026-07-02 CSN5052 - Jul 2, 19:50 UTCJul 2, 20:20 UTC30m
2026-07-02 CSN5051 - Jul 2, 15:55 UTCJul 2, 17:40 UTC1h 45m
2026-07-02 CSN6050 - Jul 2, 10:45 UTCJul 2, 11:00 UTC15m
2026-07-02 CSN3932 - Jul 2, 04:15 UTCJul 2, 04:25 UTC10m
2026-07-01 CSN6050 - Jul 1, 11:05 UTCJul 1, 11:25 UTC20m
2026-07-01 CSN6049 - Jul 1, 06:25 UTCJul 1, 06:35 UTC10m
2026-06-28 CSN6050 - Jun 28, 11:25 UTCJun 28, 11:45 UTC20m
2026-06-28 CSN6049 - Jun 28, 07:09 UTCJun 28, 07:25 UTC15m
2026-06-27 CSN6050 - Jun 27, 10:50 UTCJun 27, 11:09 UTC20m
2026-06-27 CSN6049 - Jun 27, 06:09 UTCJun 27, 06:19 UTC10m
2026-06-26 CSN6050 - Jun 26, 10:35 UTCJun 26, 11:09 UTC35m
2026-06-25 CSN6748 CAN → SYX Jun 25, 22:54 UTCJun 26, 06:15 UTC7h 20m
2026-06-25 CSN3536 TAO → CAN Jun 25, 14:44 UTCJun 25, 15:04 UTC20m
2026-06-24 CSN6050 - Jun 24, 10:39 UTCJun 24, 10:59 UTC20m
2026-06-24 CSN6049 - Jun 24, 05:44 UTCJun 24, 06:04 UTC20m
2026-06-23 CSN6748 CAN → SYX Jun 23, 22:49 UTCJun 23, 23:14 UTC25m
2026-06-23 CSN3809 - Jun 23, 09:24 UTCJun 23, 09:34 UTC10m
2026-06-21 CSN6050 - Jun 21, 10:29 UTCJun 21, 10:49 UTC20m
2026-06-21 CSN6049 - Jun 21, 05:59 UTCJun 21, 06:10 UTC10m
2026-06-20 CSN6748 CAN → SYX Jun 20, 22:35 UTCJun 20, 23:14 UTC40m
2026-06-19 CSN8476 - Jun 19, 06:59 UTCJun 19, 07:19 UTC20m
2026-06-17 CSN6748 CAN → SYX Jun 17, 22:55 UTCJun 17, 23:30 UTC35m
2026-06-17 CSN6050 - Jun 17, 11:05 UTCJun 17, 11:20 UTC15m
2026-06-17 CSN8262 - Jun 17, 01:15 UTCJun 17, 01:25 UTC10m
2026-06-16 CSN6050 - Jun 16, 11:15 UTCJun 16, 11:30 UTC15m
2026-06-16 CSN6049 - Jun 16, 07:05 UTCJun 16, 07:20 UTC15m

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 3h 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 20 distinct callsigns, including CSN6050, CSN6049, CSN6748, CSN5052, CSN3932.