Apparatus

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sensors Mode-S transponder

781634

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-306Y · AIRBUS A-350-900

Hex
781634
Octal
36013064
Decimal
7,870,004
Country
CN
Tail
B-306Y
Type
A359
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
210
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S 781634.

Country allocation

The ICAO 24-bit address 781634 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
CES249 China Eastern Airlines 21 2026-07-01
CES787 China Eastern Airlines 16 2026-07-26
CES250 China Eastern Airlines 15 2026-07-02
CES710 - 13 2026-07-15
CES709 - 12 2026-07-14
CES788 China Eastern Airlines 10 2026-07-26
CES243 China Eastern Airlines 9 2026-05-25
CES218 China Eastern Airlines 9 2026-07-25
CES217 China Eastern Airlines 9 2026-07-24
CES582 China Eastern Airlines 8 2026-07-17
CES581 - 8 2026-07-16
CES261 - 8 2026-04-29
CES5341 - 7 2026-06-23
CES262 - 7 2026-04-30
CES561 China Eastern Airlines 6 2026-07-06
CES244 China Eastern Airlines 6 2026-05-26
CES786 China Eastern Airlines 5 2026-07-23
CES785 China Eastern Airlines 5 2026-07-22
CES5350 - 5 2026-06-23
CES567 - 4 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CES788 FCO → PVG Jul 26, 19:35 UTCJul 26, 22:30 UTC2h 55m
2026-07-26 CES787 PVG → FCO Jul 26, 09:25 UTCJul 26, 16:45 UTC7h 20m
2026-07-25 CES787 PVG → FCO Jul 25, 16:15 UTCJul 26, 15:00 UTC22h 46m
2026-07-25 CES787 PVG → FCO Jul 25, 13:05 UTCJul 26, 12:45 UTC23h 41m
2026-07-25 CES218 GVA → PVG Jul 25, 11:05 UTCJul 26, 10:05 UTC23h 1m
2026-07-25 CES218 GVA → PVG Jul 25, 10:30 UTCJul 25, 17:00 UTC6h 30m
2026-07-24 CES217 PVG → GVA Jul 24, 19:15 UTCJul 25, 05:05 UTC9h 50m
2026-07-24 CES217 PVG → GVA Jul 24, 07:05 UTCJul 25, 05:05 UTC22h 0m
2026-07-24 CES217 PVG → GVA Jul 24, 05:35 UTCJul 25, 05:00 UTC23h 25m
2026-07-23 CES786 VCE → PVG Jul 23, 09:45 UTCJul 24, 04:00 UTC18h 15m
2026-07-22 CES785 PVG → VCE Jul 22, 19:00 UTCJul 23, 04:35 UTC9h 35m
2026-07-22 CES5331 - Jul 22, 04:00 UTCJul 22, 04:20 UTC20m
2026-07-20 CES788 FCO → PVG Jul 20, 19:25 UTCJul 21, 02:10 UTC6h 44m
2026-07-20 CES787 - Jul 20, 09:40 UTCJul 20, 16:50 UTC7h 10m
2026-07-19 CES787 - Jul 19, 15:55 UTCJul 20, 13:00 UTC21h 5m
2026-07-19 CES787 - Jul 19, 13:20 UTCJul 20, 13:00 UTC23h 40m
2026-07-19 CES786 VCE → PVG Jul 19, 11:05 UTCJul 20, 10:25 UTC23h 20m
2026-07-19 CES786 VCE → PVG Jul 19, 10:05 UTCJul 19, 16:35 UTC6h 30m
2026-07-18 CES785 PVG → VCE Jul 18, 12:40 UTCJul 19, 05:20 UTC16h 40m
2026-07-18 CES568 SIN → PVG Jul 18, 09:40 UTCJul 18, 10:00 UTC20m
2026-07-18 CES567 - Jul 18, 03:50 UTCJul 18, 07:45 UTC3h 55m
2026-07-17 CES582 YVR → PVG Jul 17, 05:04 UTCJul 18, 04:25 UTC23h 21m
2026-07-16 CES582 YVR → PVG Jul 16, 19:50 UTCJul 17, 05:45 UTC9h 55m
2026-07-16 CES581 - Jul 16, 06:50 UTCJul 16, 16:30 UTC9h 40m
2026-07-15 CES581 - Jul 15, 17:05 UTCJul 16, 16:30 UTC23h 25m
2026-07-15 CES710 - Jul 15, 13:05 UTCJul 16, 08:20 UTC19h 15m
2026-07-15 CES710 - Jul 15, 11:05 UTCJul 16, 08:20 UTC21h 15m
2026-07-15 CES710 - Jul 15, 10:10 UTCJul 16, 08:20 UTC22h 10m
2026-07-14 CES709 - Jul 14, 18:30 UTCJul 15, 05:50 UTC11h 19m
2026-07-14 CES709 - Jul 14, 09:05 UTCJul 15, 05:50 UTC20h 44m
2026-07-14 CES709 - Jul 14, 07:40 UTCJul 15, 05:50 UTC22h 9m
2026-07-14 CES709 - Jul 14, 03:05 UTCJul 15, 03:00 UTC23h 54m
2026-07-14 CES582 - Jul 14, 01:05 UTCJul 15, 01:00 UTC23h 54m
2026-07-13 CES582 - Jul 13, 23:05 UTCJul 14, 22:30 UTC23h 25m
2026-07-13 CES582 - Jul 13, 22:50 UTCJul 14, 18:45 UTC19h 55m
2026-07-13 CES581 - Jul 13, 01:45 UTCJul 13, 20:15 UTC18h 30m
2026-07-12 CES581 - Jul 12, 23:05 UTCJul 13, 20:15 UTC21h 10m
2026-07-12 CES218 - Jul 12, 21:05 UTCJul 13, 20:15 UTC23h 10m
2026-07-12 CES218 - Jul 12, 19:50 UTCJul 13, 11:40 UTC15h 50m
2026-07-12 CES217D - Jul 12, 07:50 UTCJul 12, 17:45 UTC9h 55m
2026-07-11 CES728 - Jul 11, 04:30 UTCJul 11, 06:01 UTC1h 30m
2026-07-11 CES727 - Jul 11, 01:05 UTCJul 11, 02:55 UTC1h 50m
2026-07-09 CES788 - Jul 9, 20:05 UTCJul 10, 02:55 UTC6h 50m
2026-07-09 CES787 - Jul 9, 11:00 UTCJul 9, 17:55 UTC6h 55m
2026-07-08 CES787 - Jul 8, 17:05 UTCJul 9, 17:00 UTC23h 55m
2026-07-08 CES787 - Jul 8, 16:35 UTCJul 9, 11:45 UTC19h 10m
2026-07-08 CES710 - Jul 8, 13:05 UTCJul 9, 11:45 UTC22h 40m
2026-07-08 CES710 - Jul 8, 11:05 UTCJul 9, 11:00 UTC23h 55m
2026-07-08 CES710 - Jul 8, 09:35 UTCJul 8, 17:15 UTC7h 40m
2026-07-07 CES709 PVG → MAD Jul 7, 18:35 UTCJul 8, 05:30 UTC10h 55m

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-306Y page for operator, model, and routing details .

Mode-S 781634 frequently asked

What is Mode-S code 781634?
781634 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-306Y.
Where is Mode-S 781634 registered?
Mode-S code 781634 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781634 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781634, octal 36013064, decimal 7,870,004.
What flights does 781634 operate?
Mode-S 781634 has broadcast 20 distinct callsigns, including CES249, CES787, CES250, CES710, CES709.