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 11h ago
Flights observed
81
Distinct callsigns
20
Country
CN
Last broadcast
11h 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 - 8 2026-07-15
CES2804 - 7 2026-07-15
CES766 - 5 2026-06-21
CES765 - 5 2026-06-21
CES2970 China Eastern Airlines 4 2026-07-03
CES2969 - 4 2026-07-03
CES2945 - 4 2026-07-14
CES2877 - 4 2026-07-17
CES2951 - 3 2026-06-30
CES7706 - 2 2026-07-09
CES2946 - 2 2026-07-15
CES2888 - 2 2026-06-23
CES2887 - 2 2026-06-23
CES2878 - 2 2026-07-17
CES2868 China Eastern Airlines 2 2026-05-02
CES2867 China Eastern Airlines 2 2026-05-02
CES2840 - 2 2026-07-16
CES2839 - 2 2026-07-15
CES2817 - 2 2026-06-25
CES2661 China Eastern Airlines 2 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CES2878 - Jul 17, 15:35 UTCJul 17, 15:44 UTC10m
2026-07-17 CES2877 - Jul 17, 13:50 UTCJul 17, 14:15 UTC25m
2026-07-16 CES2840 - Jul 16, 18:29 UTCJul 17, 01:45 UTC7h 15m
2026-07-15 CES2839 - Jul 15, 22:05 UTCJul 16, 18:40 UTC20h 35m
2026-07-15 CES2804 - Jul 15, 19:55 UTCJul 16, 18:40 UTC22h 45m
2026-07-15 CES2803 - Jul 15, 16:30 UTCJul 15, 18:05 UTC1h 35m
2026-07-15 CES2946 - Jul 15, 03:50 UTCJul 15, 04:30 UTC40m
2026-07-14 CES2945 - Jul 14, 15:20 UTCJul 15, 02:10 UTC10h 49m
2026-07-14 - - Jul 14, 00:50 UTCJul 14, 01:05 UTC15m
2026-07-10 CES2793 - Jul 10, 08:10 UTCJul 10, 08:30 UTC20m
2026-07-09 CES7706 - Jul 9, 12:55 UTCJul 10, 08:30 UTC19h 35m
2026-07-09 CES7706 - Jul 9, 09:50 UTCJul 10, 08:30 UTC22h 40m
2026-07-09 CES7705 - Jul 9, 04:45 UTCJul 9, 08:00 UTC3h 15m
2026-07-03 CES2970 KUL → NKG Jul 3, 19:20 UTCJul 3, 23:05 UTC3h 45m
2026-07-03 CES2969 - Jul 3, 14:35 UTCJul 3, 18:05 UTC3h 30m
2026-06-30 CES2951 - Jun 30, 05:00 UTCJun 30, 05:10 UTC10m
2026-06-29 CES2711 - Jun 29, 10:59 UTCJun 29, 11:14 UTC15m
2026-06-27 CES2890 - Jun 27, 09:34 UTCJun 27, 09:44 UTC10m
2026-06-25 CES2804 BKK → NKG Jun 25, 19:39 UTCJun 25, 21:59 UTC2h 20m
2026-06-25 CES2803 - Jun 25, 16:14 UTCJun 25, 17:54 UTC1h 40m
2026-06-25 CES2817 - Jun 25, 01:30 UTCJun 25, 01:40 UTC10m
2026-06-23 CES2888 - Jun 23, 10:19 UTCJun 23, 10:35 UTC15m
2026-06-23 CES2887 - Jun 23, 03:49 UTCJun 23, 08:50 UTC5h 0m
2026-06-23 CES579 - Jun 23, 01:50 UTCJun 23, 02:15 UTC25m
2026-06-21 CES766 - Jun 21, 04:04 UTCJun 21, 09:00 UTC4h 55m
2026-06-21 CES765 - Jun 21, 01:35 UTCJun 21, 02:10 UTC35m
2026-06-20 CES2810 - Jun 20, 02:54 UTCJun 20, 03:09 UTC15m
2026-06-20 CES2809 - Jun 20, 00:49 UTCJun 20, 00:59 UTC10m
2026-06-18 CES2877 - Jun 18, 19:45 UTCJun 18, 20:05 UTC20m
2026-06-17 CES2839 - Jun 17, 18:35 UTCJun 18, 01:40 UTC7h 5m
2026-06-14 CES766 - Jun 14, 03:45 UTCJun 14, 04:05 UTC20m
2026-06-13 CES2970 KUL → NKG Jun 13, 17:05 UTCJun 14, 02:20 UTC9h 15m
2026-06-13 CES2969 - Jun 13, 11:50 UTCJun 13, 15:45 UTC3h 55m
2026-06-10 CES2804 BKK → NKG Jun 10, 20:15 UTCJun 10, 22:25 UTC2h 10m
2026-06-10 CES2803 NKG → BKK Jun 10, 16:40 UTCJun 10, 18:35 UTC1h 55m
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

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 11h 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, CES2804, CES766, CES765, CES2970.