Apparatus

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sensors Mode-S transponder

781684

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-307Y · AIRBUS A-350-900

Hex
781684
Octal
36013204
Decimal
7,870,084
Country
CN
Tail
B-307Y
Type
A359
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
214
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 781684.

Country allocation

The ICAO 24-bit address 781684 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
CES787 - 18 2026-07-14
CES788 - 15 2026-07-14
CES561 - 15 2026-07-21
CES217 - 12 2026-07-13
CES243 China Eastern Airlines 11 2026-07-24
CES223 China Eastern Airlines 11 2026-06-04
CES785 China Eastern Airlines 10 2026-07-19
CES709 China Eastern Airlines 10 2026-06-22
CES562 China Eastern Airlines 10 2026-07-22
CES710 - 9 2026-06-23
CES218 - 9 2026-07-13
CES786 China Eastern Airlines 8 2026-07-20
CES752 - 8 2026-06-25
CES244 China Eastern Airlines 8 2026-07-25
CES224 China Eastern Airlines 8 2026-06-05
CES751 - 6 2026-06-25
CES567 - 5 2026-07-04
CES249 - 5 2026-07-09
CES782 China Eastern Airlines 4 2026-07-24
CES568 China Eastern Airlines 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES522 NRT → PVG Jul 26, 08:30 UTCJul 26, 23:00 UTC14h 30m
2026-07-25 CES244 MXP → PVG Jul 25, 11:50 UTCJul 26, 06:35 UTC18h 46m
2026-07-24 CES243 PVG → MXP Jul 24, 19:30 UTCJul 25, 05:40 UTC10h 10m
2026-07-24 CES243 PVG → MXP Jul 24, 09:20 UTCJul 25, 05:40 UTC20h 20m
2026-07-24 CES782 ADL → PVG Jul 24, 00:25 UTCJul 24, 20:05 UTC19h 40m
2026-07-23 CES781 PVG → ADL Jul 23, 06:05 UTCJul 23, 21:50 UTC15h 45m
2026-07-22 CES523 PVG → NRT Jul 22, 12:50 UTCJul 23, 04:00 UTC15h 10m
2026-07-22 CES562 SYD → PVG Jul 22, 04:10 UTCJul 23, 03:00 UTC22h 50m
2026-07-21 CES561 - Jul 21, 07:05 UTCJul 22, 02:05 UTC19h 0m
2026-07-21 CES524 NRT → PVG Jul 21, 05:40 UTCJul 22, 02:05 UTC20h 25m
2026-07-20 CES786 VCE → PVG Jul 20, 09:50 UTCJul 21, 04:00 UTC18h 9m
2026-07-19 CES785 PVG → VCE Jul 19, 11:00 UTCJul 20, 05:00 UTC18h 0m
2026-07-19 CES785 PVG → VCE Jul 19, 03:05 UTCJul 20, 03:00 UTC23h 55m
2026-07-19 CES562 SYD → PVG Jul 19, 02:20 UTCJul 20, 01:00 UTC22h 40m
2026-07-18 CES561 - Jul 18, 05:05 UTCJul 19, 00:20 UTC19h 15m
2026-07-18 CES561 KIX → SYD Jul 18, 04:35 UTCJul 19, 00:20 UTC19h 45m
2026-07-17 CES566 - Jul 17, 16:04 UTCJul 18, 03:10 UTC11h 6m
2026-07-16 CES565 - Jul 16, 17:40 UTCJul 17, 11:45 UTC18h 5m
2026-07-16 CES244 - Jul 16, 15:05 UTCJul 17, 11:45 UTC20h 40m
2026-07-16 CES244 - Jul 16, 13:05 UTCJul 17, 11:45 UTC22h 40m
2026-07-16 CES244 - Jul 16, 11:45 UTCJul 17, 08:45 UTC21h 0m
2026-07-15 CES243 - Jul 15, 19:25 UTCJul 16, 05:35 UTC10h 10m
2026-07-14 CES243 - Jul 14, 21:05 UTCJul 15, 19:45 UTC22h 39m
2026-07-14 CES788 - Jul 14, 19:15 UTCJul 14, 21:10 UTC1h 55m
2026-07-14 CES787 - Jul 14, 06:10 UTCJul 14, 16:20 UTC10h 10m
2026-07-13 CES787 - Jul 13, 16:00 UTCJul 14, 15:00 UTC23h 0m
2026-07-13 CES218 - Jul 13, 11:05 UTCJul 14, 10:00 UTC22h 55m
2026-07-13 CES218 - Jul 13, 10:15 UTCJul 14, 06:25 UTC20h 10m
2026-07-13 CES217 - Jul 13, 05:20 UTCJul 13, 05:35 UTC15m
2026-07-12 CES217 - Jul 12, 10:35 UTCJul 13, 02:20 UTC15h 45m
2026-07-12 CES217 - Jul 12, 03:20 UTCJul 13, 02:20 UTC23h 0m
2026-07-12 CES562 - Jul 12, 01:45 UTCJul 13, 01:01 UTC23h 15m
2026-07-11 CES561 - Jul 11, 13:45 UTCJul 11, 22:50 UTC9h 5m
2026-07-10 CES250 - Jul 10, 09:35 UTCJul 10, 13:10 UTC3h 35m
2026-07-09 CES249 - Jul 9, 11:35 UTCJul 10, 05:25 UTC17h 50m
2026-07-09 CES249 - Jul 9, 09:50 UTCJul 10, 05:25 UTC19h 35m
2026-07-09 CES249 - Jul 9, 03:05 UTCJul 10, 03:00 UTC23h 55m
2026-07-09 CES562 - Jul 9, 02:25 UTCJul 10, 01:00 UTC22h 35m
2026-07-08 CES561 - Jul 8, 14:15 UTCJul 8, 23:15 UTC9h 0m
2026-07-08 CES561 - Jul 8, 01:40 UTCJul 8, 23:15 UTC21h 35m
2026-07-07 CES788 - Jul 7, 21:05 UTCJul 8, 16:25 UTC19h 20m
2026-07-07 CES788 - Jul 7, 19:35 UTCJul 8, 16:25 UTC20h 50m
2026-07-07 CES787 PVG → FCO Jul 7, 09:15 UTCJul 7, 16:40 UTC7h 25m
2026-07-06 CES522 - Jul 6, 08:30 UTCJul 6, 10:10 UTC1h 40m
2026-07-05 CES786 - Jul 5, 11:05 UTCJul 6, 06:35 UTC19h 30m
2026-07-05 CES786 - Jul 5, 09:55 UTCJul 6, 06:35 UTC20h 40m
2026-07-04 CES785 PVG → VCE Jul 4, 10:20 UTCJul 5, 05:00 UTC18h 40m
2026-07-04 CES567 - Jul 4, 04:35 UTCJul 4, 08:25 UTC3h 50m
2026-07-03 CES782 - Jul 3, 07:05 UTCJul 4, 05:35 UTC22h 30m
2026-07-03 CES782 - Jul 3, 06:45 UTCJul 4, 05:00 UTC22h 15m

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-307Y page for operator, model, and routing details .

Mode-S 781684 frequently asked

What is Mode-S code 781684?
781684 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-307Y.
Where is Mode-S 781684 registered?
Mode-S code 781684 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781684 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781684, octal 36013204, decimal 7,870,084.
What flights does 781684 operate?
Mode-S 781684 has broadcast 20 distinct callsigns, including CES787, CES788, CES561, CES217, CES243.