Apparatus

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sensors Mode-S transponder

781540

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-303D · AIRBUS A-330-300

Hex
781540
Octal
36012500
Decimal
7,869,760
Country
CN
Tail
B-303D
Type
A333
No current signal · last broadcast Jul 23, 16:15 UTC
Flights observed
194
Distinct callsigns
20
Country
CN
Last broadcast
Jul 23, 16:15 UTC

Last known position

Most recent position reported by Mode-S 781540.

Country allocation

The ICAO 24-bit address 781540 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
CES703 China Eastern Airlines 23 2026-07-21
CES704 China Eastern Airlines 16 2026-07-21
CES235 - 15 2026-07-16
CES5005 - 9 2026-06-29
CES591 - 8 2026-06-16
CES5029 China Eastern Airlines 8 2026-07-19
CES5098 China Eastern Airlines 7 2026-06-08
CES5042 China Eastern Airlines 7 2026-07-20
CES538 China Eastern Airlines 6 2026-06-02
CES512 China Eastern Airlines 6 2026-06-04
CES511 China Eastern Airlines 6 2026-06-07
CES592 - 5 2026-06-17
CES537 China Eastern Airlines 5 2026-06-02
CES521 China Eastern Airlines 5 2026-07-16
CES5097 China Eastern Airlines 5 2026-06-08
CES5041 - 5 2026-06-11
CES5340 China Eastern Airlines 4 2026-07-23
CES5333 - 4 2026-07-07
CES5030 China Eastern Airlines 4 2026-04-25
CES248 China Eastern Airlines 4 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 CES5128 PEK → SHA Jul 23, 16:05 UTCJul 23, 16:15 UTC10m
2026-07-23 CES5340 SZX → SHA Jul 23, 06:10 UTCJul 23, 06:20 UTC10m
2026-07-23 CES5331 PVG → SZX Jul 23, 04:35 UTCJul 23, 04:45 UTC10m
2026-07-21 CES704 IST → PVG Jul 21, 11:10 UTCJul 21, 13:05 UTC1h 55m
2026-07-21 CES703 PVG → IST Jul 21, 04:40 UTCJul 21, 05:05 UTC25m
2026-07-20 CES703 PVG → IST Jul 20, 12:25 UTCJul 21, 04:05 UTC15h 40m
2026-07-20 CES5042 ICN → PVG Jul 20, 06:25 UTCJul 20, 11:15 UTC4h 50m
2026-07-19 CES5029 PVG → DPS Jul 19, 12:20 UTCJul 20, 05:05 UTC16h 45m
2026-07-19 CES5029 PVG → DPS Jul 19, 06:05 UTCJul 20, 05:05 UTC23h 0m
2026-07-19 CES524 NRT → PVG Jul 19, 05:55 UTCJul 19, 22:55 UTC17h 0m
2026-07-18 CES523 - Jul 18, 11:20 UTCJul 19, 04:10 UTC16h 50m
2026-07-18 CES703 - Jul 18, 05:15 UTCJul 18, 05:30 UTC15m
2026-07-17 CES703 - Jul 17, 10:05 UTCJul 18, 04:30 UTC18h 26m
2026-07-17 CES522 - Jul 17, 08:59 UTCJul 18, 04:30 UTC19h 31m
2026-07-16 CES521 PVG → NRT Jul 16, 12:25 UTCJul 17, 07:14 UTC18h 50m
2026-07-16 CES521 PVG → NRT Jul 16, 10:04 UTCJul 17, 07:14 UTC21h 10m
2026-07-16 CES235 - Jul 16, 08:05 UTCJul 17, 07:14 UTC23h 10m
2026-07-16 CES235 - Jul 16, 07:50 UTCJul 17, 06:00 UTC22h 10m
2026-07-15 CES235 - Jul 15, 18:20 UTCJul 16, 16:19 UTC22h 0m
2026-07-15 CES235 - Jul 15, 15:15 UTCJul 16, 12:49 UTC21h 35m
2026-07-15 CES235 - Jul 15, 11:05 UTCJul 16, 10:00 UTC22h 55m
2026-07-15 CES235 - Jul 15, 08:25 UTCJul 16, 08:00 UTC23h 35m
2026-07-15 CES235 - Jul 15, 06:40 UTCJul 15, 19:55 UTC13h 15m
2026-07-14 CES235 - Jul 14, 10:05 UTCJul 15, 09:40 UTC23h 34m
2026-07-14 CES522 - Jul 14, 08:30 UTCJul 15, 06:45 UTC22h 14m
2026-07-13 CES521 - Jul 13, 12:05 UTCJul 14, 06:45 UTC18h 40m
2026-07-13 CES521 - Jul 13, 11:15 UTCJul 14, 06:45 UTC19h 30m
2026-07-13 CES703 - Jul 13, 04:40 UTCJul 13, 05:10 UTC30m
2026-07-12 CES703 - Jul 12, 13:20 UTCJul 13, 04:05 UTC14h 45m
2026-07-11 CES704 - Jul 11, 21:10 UTCJul 12, 11:55 UTC14h 45m
2026-07-11 CES703 - Jul 11, 03:55 UTCJul 11, 04:15 UTC20m
2026-07-10 CES703 - Jul 10, 10:15 UTCJul 11, 03:20 UTC17h 5m
2026-07-10 CES703 - Jul 10, 07:00 UTCJul 11, 03:20 UTC20h 20m
2026-07-09 CES5379 - Jul 9, 08:05 UTCJul 10, 07:25 UTC23h 20m
2026-07-09 CES5042 - Jul 9, 07:45 UTCJul 9, 08:30 UTC45m
2026-07-08 CES704 - Jul 8, 12:20 UTCJul 9, 06:05 UTC17h 45m
2026-07-08 CES704 - Jul 8, 11:20 UTCJul 9, 06:05 UTC18h 45m
2026-07-07 CES703 - Jul 7, 23:25 UTCJul 8, 04:20 UTC4h 55m
2026-07-07 CES5342 - Jul 7, 11:10 UTCJul 7, 11:25 UTC15m
2026-07-07 CES5333 - Jul 7, 04:45 UTCJul 7, 05:05 UTC20m
2026-07-06 CES2056 - Jul 6, 14:20 UTCJul 7, 04:15 UTC13h 55m
2026-07-06 CES2055 - Jul 6, 10:40 UTCJul 6, 11:45 UTC1h 5m
2026-07-05 CES2055 - Jul 5, 13:30 UTCJul 6, 11:45 UTC22h 15m
2026-07-05 CES5350 - Jul 5, 12:15 UTCJul 5, 12:25 UTC10m
2026-07-05 CES5341 - Jul 5, 09:55 UTCJul 5, 10:10 UTC15m
2026-07-04 CSH9254 - Jul 4, 14:25 UTCJul 4, 14:35 UTC10m
2026-07-04 CSH9253 - Jul 4, 11:35 UTCJul 4, 11:50 UTC15m
2026-07-04 CSH9308 - Jul 4, 06:10 UTCJul 4, 06:20 UTC10m
2026-07-03 CES5340 - Jul 3, 06:15 UTCJul 3, 06:25 UTC10m
2026-07-02 CES5333 - Jul 2, 08:15 UTCJul 3, 03:15 UTC19h 0m

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

Mode-S 781540 frequently asked

What is Mode-S code 781540?
781540 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-303D.
Where is Mode-S 781540 registered?
Mode-S code 781540 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781540 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 16:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781540, octal 36012500, decimal 7,869,760.
What flights does 781540 operate?
Mode-S 781540 has broadcast 20 distinct callsigns, including CES703, CES704, CES235, CES5005, CES591.