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 2h ago
Flights observed
191
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

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 - 12 2026-07-11
CES217 - 12 2026-07-13
CES223 China Eastern Airlines 11 2026-06-04
CES709 China Eastern Airlines 10 2026-06-22
CES710 - 9 2026-06-23
CES218 - 9 2026-07-13
CES785 China Eastern Airlines 8 2026-07-04
CES752 - 8 2026-06-25
CES562 - 8 2026-07-12
CES224 China Eastern Airlines 8 2026-06-05
CES786 - 7 2026-07-05
CES243 China Eastern Airlines 7 2026-06-16
CES751 - 6 2026-06-25
CES567 - 5 2026-07-04
CES249 - 5 2026-07-09
CES568 China Eastern Airlines 4 2026-05-27
CES244 China Eastern Airlines 4 2026-06-17
CES782 - 3 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-03 CES782 - Jul 3, 00:20 UTCJul 3, 08:00 UTC7h 40m
2026-07-02 CES781 - Jul 2, 12:40 UTCJul 2, 21:05 UTC8h 25m
2026-07-01 CES788 - Jul 1, 21:05 UTCJul 2, 21:00 UTC23h 55m
2026-07-01 CES788 - Jul 1, 20:05 UTCJul 2, 18:10 UTC22h 5m
2026-07-01 CES787 PVG → FCO Jul 1, 06:55 UTCJul 1, 17:25 UTC10h 30m
2026-06-30 CES787 PVG → FCO Jun 30, 15:55 UTCJul 1, 15:00 UTC23h 5m
2026-06-30 CES218 - Jun 30, 11:05 UTCJul 1, 10:50 UTC23h 45m
2026-06-30 CES218 - Jun 30, 10:20 UTCJul 1, 07:15 UTC20h 55m
2026-06-29 CES217 - Jun 29, 22:15 UTCJun 30, 05:30 UTC7h 16m
2026-06-29 CES5342 - Jun 29, 05:09 UTCJun 29, 05:20 UTC10m
2026-06-27 CES218 - Jun 27, 10:19 UTCJun 27, 16:44 UTC6h 25m
2026-06-26 CES217 - Jun 26, 19:09 UTCJun 27, 04:54 UTC9h 45m
2026-06-26 CES217 - Jun 26, 01:54 UTCJun 26, 22:55 UTC21h 0m
2026-06-25 CES752 - Jun 25, 23:19 UTCJun 26, 22:55 UTC23h 35m
2026-06-25 CES752 - Jun 25, 19:44 UTCJun 26, 02:34 UTC6h 50m
2026-06-25 CES751 - Jun 25, 09:05 UTCJun 25, 16:05 UTC7h 0m
2026-06-23 CES710 - Jun 23, 09:34 UTCJun 23, 17:20 UTC7h 45m
2026-06-22 CES709 PVG → MAD Jun 22, 18:49 UTCJun 23, 05:39 UTC10h 50m
2026-06-21 CES786 - Jun 21, 09:49 UTCJun 21, 16:14 UTC6h 25m
2026-06-20 CES785 PVG → VCE Jun 20, 09:05 UTCJun 21, 04:49 UTC19h 45m
2026-06-20 CES785 PVG → VCE Jun 20, 08:49 UTCJun 21, 04:49 UTC20h 0m
2026-06-20 CES562 - Jun 20, 01:14 UTCJun 21, 00:59 UTC23h 45m
2026-06-19 CES561 PVG → SYD Jun 19, 21:09 UTCJun 19, 22:49 UTC1h 40m

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 2h ago.
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, CES223.