Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781537

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-303A · AIRBUS A-320neo

Hex
781537
Octal
36012467
Decimal
7,869,751
Country
CN
Tail
B-303A
Type
A20N
No current signal · last broadcast 8d ago
Flights observed
46
Distinct callsigns
20
Country
CN
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 781537.

Country allocation

The ICAO 24-bit address 781537 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
CES2803 China Eastern Airlines 5 2026-04-27
CES765 China Eastern Airlines 4 2026-05-25
CES2804 China Eastern Airlines 4 2026-04-27
CES766 China Eastern Airlines 3 2026-05-25
CES2945 China Eastern Airlines 3 2026-04-22
CES2970 China Eastern Airlines 2 2026-05-04
CES2969 China Eastern Airlines 2 2026-05-04
CES2951 China Eastern Airlines 2 2026-05-23
CES2877 China Eastern Airlines 2 2026-05-13
CES2868 China Eastern Airlines 2 2026-05-02
CES2867 China Eastern Airlines 2 2026-05-02
CES2661 China Eastern Airlines 2 2026-05-23
CES5002 China Eastern Airlines 1 2026-05-03
CES5001 China Eastern Airlines 1 2026-05-03
CES2946 China Eastern Airlines 1 2026-04-22
CES2894 China Eastern Airlines 1 2026-05-20
CES2893 China Eastern Airlines 1 2026-05-08
CES2888 China Eastern Airlines 1 2026-05-02
CES2887 China Eastern Airlines 1 2026-05-02
CES2878 China Eastern Airlines 1 2026-05-13

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-05-25 CES766 HKG → NKG May 25, 04:00 UTCMay 25, 12:45 UTC8h 45m
2026-05-25 CES765 NKG → HKG May 25, 01:55 UTCMay 25, 02:00 UTC5m
2026-05-23 CES2951 NKG → ZUH May 23, 05:00 UTCMay 23, 05:10 UTC10m
2026-05-23 CES2661 ZUH → PKX May 23, 02:30 UTCMay 23, 02:50 UTC20m
2026-05-20 CES2894 SYX → NKG May 20, 02:15 UTCMay 20, 06:00 UTC3h 46m
2026-05-17 CES2727 NKG → SYX May 17, 11:15 UTCMay 17, 14:45 UTC3h 30m
2026-05-15 CES2817 NKG → CAN May 15, 01:05 UTCMay 15, 01:20 UTC15m
2026-05-13 CES2878 SZX → NKG May 13, 15:45 UTCMay 13, 15:55 UTC10m
2026-05-13 CES2877 NKG → SZX May 13, 13:31 UTCMay 13, 14:05 UTC35m
2026-05-12 CES2877 NKG → SZX May 12, 18:25 UTCMay 13, 13:00 UTC18h 35m
2026-05-09 CES2951 NKG → ZUH May 9, 04:45 UTCMay 9, 05:00 UTC15m
2026-05-09 CES2661 ZUH → PKX May 9, 02:25 UTCMay 9, 02:45 UTC20m
2026-05-08 CES2662 ZUH → PKX May 8, 12:25 UTCMay 8, 12:39 UTC15m
2026-05-08 CES2893 NKG → SYX May 8, 02:14 UTCMay 8, 05:54 UTC3h 40m
2026-05-04 CES2970 KUL → NKG May 4, 17:10 UTCMay 4, 17:30 UTC20m
2026-05-04 CES2969 NKG → KUL May 4, 11:40 UTCMay 4, 15:50 UTC4h 10m
2026-05-03 CES5002 TPE → NKG May 3, 10:00 UTCMay 3, 10:30 UTC30m
2026-05-03 CES5001 NKG → TPE May 3, 08:00 UTCMay 3, 08:50 UTC50m
2026-05-02 CES2888 SZX → NKG May 2, 09:55 UTCMay 2, 10:05 UTC10m
2026-05-02 CES2887 NKG → SZX May 2, 08:05 UTCMay 2, 08:25 UTC20m
2026-05-02 CES2868 SZX → NKG May 2, 03:15 UTCMay 2, 03:25 UTC10m
2026-05-02 CES2867 NKG → SZX May 2, 01:30 UTCMay 2, 01:55 UTC25m
2026-05-01 CES2712 ZUH → NKG May 1, 00:20 UTCMay 1, 00:30 UTC10m
2026-04-29 CES2970 KUL → NKG Apr 29, 17:30 UTCApr 29, 21:00 UTC3h 30m
2026-04-29 CES2969 NKG → KUL Apr 29, 12:30 UTCApr 29, 16:00 UTC3h 30m
2026-04-27 CES2804 BKK → NKG Apr 27, 19:40 UTCApr 28, 06:35 UTC10h 55m
2026-04-27 CES2803 NKG → BKK Apr 27, 17:55 UTCApr 27, 18:25 UTC30m
2026-04-25 CES766 HKG → NKG Apr 25, 04:25 UTCApr 25, 05:20 UTC55m
2026-04-25 CES765 NKG → HKG Apr 25, 02:10 UTCApr 25, 02:45 UTC35m
2026-04-23 CES2840 HRB → NKG Apr 23, 01:25 UTCApr 23, 01:35 UTC10m
2026-04-22 CES2946 KHH → NKG Apr 22, 03:45 UTCApr 22, 18:50 UTC15h 5m
2026-04-22 CES2945 NKG → KHH Apr 22, 01:10 UTCApr 22, 02:05 UTC55m
2026-04-21 CES2945 NKG → KHH Apr 21, 05:50 UTCApr 22, 02:05 UTC20h 15m
2026-04-21 CES2945 NKG → KHH Apr 21, 02:15 UTCApr 22, 01:45 UTC23h 30m
2026-04-19 CES2804 BKK → NKG Apr 19, 20:05 UTCApr 19, 22:15 UTC2h 10m
2026-04-19 CES2803 NKG → BKK Apr 19, 04:00 UTCApr 19, 18:05 UTC14h 5m
2026-04-19 CES765 NKG → HKG Apr 19, 02:20 UTCApr 19, 02:35 UTC15m
2026-04-17 CES2804 BKK → NKG Apr 17, 19:30 UTCApr 17, 19:45 UTC15m
2026-04-17 CES2803 NKG → BKK Apr 17, 18:05 UTCApr 17, 18:20 UTC15m
2026-04-17 CES2868 SZX → NKG Apr 17, 03:20 UTCApr 17, 03:30 UTC10m
2026-04-17 CES2867 NKG → SZX Apr 17, 01:40 UTCApr 17, 02:00 UTC20m
2026-04-14 CES2804 BKK → NKG Apr 14, 19:20 UTCApr 14, 19:45 UTC25m
2026-04-14 CES2803 NKG → BKK Apr 14, 17:45 UTCApr 14, 18:10 UTC25m
2026-04-14 CES2803 NKG → BKK Apr 14, 16:05 UTCApr 14, 16:15 UTC10m
2026-04-13 CES766 - Apr 13, 04:00 UTCApr 13, 04:15 UTC15m
2026-04-13 CES765 - Apr 13, 01:45 UTCApr 13, 02:15 UTC30m

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-303A page for operator, model, and routing details .

Mode-S 781537 frequently asked

What is Mode-S code 781537?
781537 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-303A.
Where is Mode-S 781537 registered?
Mode-S code 781537 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781537 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781537, octal 36012467, decimal 7,869,751.
What flights does 781537 operate?
Mode-S 781537 has broadcast 20 distinct callsigns, including CES2803, CES765, CES2804, CES766, CES2945.