Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781503

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-205L · BOEING 737 MAX 8

Hex
781503
Octal
36012403
Decimal
7,869,699
Country
CN
Tail
B-205L
Type
B38M
No current signal · last broadcast 13h ago
Flights observed
82
Distinct callsigns
20
Country
CN
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 781503.

Country allocation

The ICAO 24-bit address 781503 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
CSN3047 China Southern Airlines 9 2026-05-30
CSN3048 China Southern Airlines 8 2026-05-30
CSN5056 China Southern Airlines 7 2026-05-09
CSN8071 China Southern Airlines 6 2026-05-23
CSN5055 China Southern Airlines 6 2026-05-08
CSN398 China Southern Airlines 6 2026-05-24
CSN8072 China Southern Airlines 4 2026-04-19
CSN366 China Southern Airlines 4 2026-05-24
CSN8362 China Southern Airlines 3 2026-05-21
CSN8347 China Southern Airlines 3 2026-05-01
CSN8012 China Southern Airlines 3 2026-04-20
CSN8011 China Southern Airlines 3 2026-04-20
CSN397 China Southern Airlines 3 2026-05-24
CSN8348 China Southern Airlines 2 2026-05-01
CSN8020 China Southern Airlines 2 2026-05-29
CSN8019 China Southern Airlines 2 2026-05-29
CSN8361 China Southern Airlines 1 2026-05-20
CSN6910 China Southern Airlines 1 2026-05-17
CSN6903 China Southern Airlines 1 2026-05-17
CSN6052 China Southern Airlines 1 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CSN3048 KUL → CAN May 30, 06:40 UTCMay 30, 06:50 UTC10m
2026-05-30 CSN3047 CAN → KUL May 30, 04:35 UTCMay 30, 05:05 UTC30m
2026-05-30 CSN3047 CAN → KUL May 30, 01:40 UTCMay 30, 01:50 UTC10m
2026-05-29 CSN8020 BKK → CAN May 29, 13:30 UTCMay 29, 15:05 UTC1h 35m
2026-05-29 CSN8019 CAN → BKK May 29, 09:40 UTCMay 29, 11:50 UTC2h 10m
2026-05-28 CSN3048 KUL → CAN May 28, 09:35 UTCMay 28, 09:45 UTC10m
2026-05-28 CSN3048 KUL → CAN May 28, 06:55 UTCMay 28, 07:10 UTC15m
2026-05-28 CSN3047 CAN → KUL May 28, 04:50 UTCMay 28, 05:20 UTC30m
2026-05-26 CSN3810 - May 26, 14:30 UTCMay 26, 14:40 UTC10m
2026-05-25 CSN3048 KUL → CAN May 25, 08:30 UTCMay 25, 08:50 UTC20m
2026-05-25 CSN3047 CAN → KUL May 25, 02:15 UTCMay 25, 05:40 UTC3h 25m
2026-05-24 CSN398 MNL → CAN May 24, 11:40 UTCMay 24, 12:00 UTC20m
2026-05-24 CSN398 MNL → CAN May 24, 10:15 UTCMay 24, 10:50 UTC35m
2026-05-24 CSN397 CAN → MNL May 24, 06:30 UTCMay 24, 08:25 UTC1h 55m
2026-05-24 CSN366 KUL → CAN May 24, 00:30 UTCMay 24, 00:45 UTC15m
2026-05-23 CSN8071 CAN → KUL May 23, 16:05 UTCMay 23, 16:45 UTC40m
2026-05-23 CSN3048 KUL → CAN May 23, 07:10 UTCMay 23, 07:25 UTC15m
2026-05-23 CSN3047 CAN → KUL May 23, 04:45 UTCMay 23, 05:15 UTC30m
2026-05-23 CSN3047 CAN → KUL May 23, 01:55 UTCMay 23, 02:05 UTC10m
2026-05-21 CSN398 MNL → CAN May 21, 12:20 UTCMay 21, 12:40 UTC20m
2026-05-21 CSN398 MNL → CAN May 21, 11:00 UTCMay 21, 11:30 UTC30m
2026-05-21 CSN397 CAN → MNL May 21, 07:50 UTCMay 21, 09:30 UTC1h 40m
2026-05-21 CSN8362 DRW → CAN May 21, 03:10 UTCMay 21, 03:30 UTC20m
2026-05-21 CSN8362 DRW → CAN May 21, 01:45 UTCMay 21, 02:20 UTC35m
2026-05-20 CSN8362 DRW → CAN May 20, 22:15 UTCMay 20, 22:25 UTC10m
2026-05-20 CSN8361 CAN → DRW May 20, 14:55 UTCMay 20, 16:35 UTC1h 40m
2026-05-17 CSN6910 PKX → URC May 17, 11:55 UTCMay 17, 12:10 UTC15m
2026-05-17 CSN6903 URC → PKX May 17, 09:30 UTCMay 17, 09:40 UTC10m
2026-05-15 CSN8020 BKK → CAN May 15, 13:05 UTCMay 15, 13:50 UTC45m
2026-05-15 CSN8019 CAN → BKK May 15, 10:50 UTCMay 15, 11:30 UTC40m
2026-05-10 CSN398 MNL → CAN May 10, 11:35 UTCMay 10, 12:05 UTC30m
2026-05-10 CSN398 MNL → CAN May 10, 10:10 UTCMay 10, 10:45 UTC35m
2026-05-10 CSN397 CAN → MNL May 10, 06:35 UTCMay 10, 08:15 UTC1h 40m
2026-05-10 CSN366 KUL → CAN May 10, 00:15 UTCMay 10, 00:30 UTC15m
2026-05-09 CSN8071 CAN → KUL May 9, 16:20 UTCMay 9, 16:40 UTC20m
2026-05-09 CSN8071 CAN → KUL May 9, 13:25 UTCMay 9, 13:35 UTC10m
2026-05-09 CSN5056 POM → CAN May 9, 08:25 UTCMay 9, 08:55 UTC30m
2026-05-08 CSN5055 CAN → POM May 8, 17:50 UTCMay 9, 07:35 UTC13h 45m
2026-05-07 CSN367 CAN → SGN May 7, 12:45 UTCMay 7, 13:00 UTC15m
2026-05-07 CSN5096 BKK → CAN May 7, 08:40 UTCMay 7, 09:25 UTC45m
2026-05-07 CSN5095 CAN → BKK May 7, 05:45 UTCMay 7, 06:30 UTC45m
2026-05-02 CSN5056 POM → CAN May 2, 08:30 UTCMay 2, 08:45 UTC15m
2026-05-01 CSN5055 CAN → POM May 1, 17:35 UTCMay 2, 07:40 UTC14h 5m
2026-05-01 CSN8348 KUL → CAN May 1, 09:40 UTCMay 1, 09:55 UTC15m
2026-05-01 CSN8347 CAN → KUL May 1, 04:25 UTCMay 1, 07:55 UTC3h 30m
2026-04-30 CSN3372 NGB → CAN Apr 30, 15:55 UTCApr 30, 16:15 UTC20m
2026-04-30 CSN5056 POM → CAN Apr 30, 08:40 UTCApr 30, 09:00 UTC20m
2026-04-29 CSN5055 CAN → POM Apr 29, 17:50 UTCApr 30, 07:40 UTC13h 49m
2026-04-28 CSN8348 KUL → CAN Apr 28, 09:30 UTCApr 28, 09:50 UTC20m
2026-04-28 CSN8347 CAN → KUL Apr 28, 07:20 UTCApr 28, 08:00 UTC40m

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-205L page for operator, model, and routing details .

Mode-S 781503 frequently asked

What is Mode-S code 781503?
781503 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-205L.
Where is Mode-S 781503 registered?
Mode-S code 781503 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781503 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781503, octal 36012403, decimal 7,869,699.
What flights does 781503 operate?
Mode-S 781503 has broadcast 20 distinct callsigns, including CSN3047, CSN3048, CSN5056, CSN8071, CSN5055.