Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 8h ago
Flights observed
109
Distinct callsigns
20
Country
CN
Last broadcast
8h ago

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 13 2026-05-28
CES250 China Eastern Airlines 10 2026-05-29
CES243 China Eastern Airlines 9 2026-05-25
CES261 - 8 2026-04-29
CES710 China Eastern Airlines 7 2026-05-17
CES262 - 7 2026-04-30
CES788 China Eastern Airlines 6 2026-05-27
CES244 China Eastern Airlines 6 2026-05-26
CES709 China Eastern Airlines 5 2026-05-16
CES217 China Eastern Airlines 5 2026-04-17
CES787 China Eastern Airlines 4 2026-05-27
CES581 China Eastern Airlines 4 2026-05-18
CES561 China Eastern Airlines 4 2026-05-04
CES218 China Eastern Airlines 4 2026-04-17
CES582 China Eastern Airlines 3 2026-05-18
CES567 China Eastern Airlines 3 2026-04-22
CES562 China Eastern Airlines 2 2026-05-05
CES521 China Eastern Airlines 2 2026-04-18
CES223 China Eastern Airlines 2 2026-05-01
CES568 China Eastern Airlines 1 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CES250 BCN → PVG May 29, 09:30 UTCMay 29, 17:10 UTC7h 40m
2026-05-28 CES249 PVG → BCN May 28, 18:15 UTCMay 28, 22:15 UTC4h 0m
2026-05-28 CES249 PVG → BCN May 28, 01:50 UTCMay 28, 22:15 UTC20h 25m
2026-05-27 CES788 FCO → PVG May 27, 23:15 UTCMay 28, 22:15 UTC23h 0m
2026-05-27 CES788 FCO → PVG May 27, 21:05 UTCMay 28, 18:35 UTC21h 30m
2026-05-27 CES788 FCO → PVG May 27, 19:35 UTCMay 28, 18:35 UTC23h 0m
2026-05-27 CES787 PVG → FCO May 27, 09:15 UTCMay 27, 16:20 UTC7h 5m
2026-05-26 CES787 PVG → FCO May 26, 15:05 UTCMay 27, 15:00 UTC23h 55m
2026-05-26 CES244 MXP → PVG May 26, 13:04 UTCMay 27, 12:40 UTC23h 35m
2026-05-26 CES244 MXP → PVG May 26, 11:39 UTCMay 27, 10:10 UTC22h 31m
2026-05-25 CES243 PVG → MXP May 25, 19:44 UTCMay 26, 05:59 UTC10h 15m
2026-05-24 CES244 MXP → PVG May 24, 11:25 UTCMay 24, 18:00 UTC6h 35m
2026-05-23 CES243 PVG → MXP May 23, 22:35 UTCMay 24, 05:35 UTC7h 0m
2026-05-22 CES250 BCN → PVG May 22, 09:45 UTCMay 22, 17:00 UTC7h 15m
2026-05-21 CES249 PVG → BCN May 21, 18:20 UTCMay 22, 05:15 UTC10h 55m
2026-05-21 CES249 PVG → BCN May 21, 09:05 UTCMay 22, 05:15 UTC20h 10m
2026-05-21 CES249 PVG → BCN May 21, 07:05 UTCMay 22, 05:15 UTC22h 10m
2026-05-20 CES244 MXP → PVG May 20, 11:25 UTCMay 21, 05:05 UTC17h 40m
2026-05-19 CES243 PVG → MXP May 19, 19:15 UTCMay 20, 05:40 UTC10h 26m
2026-05-19 CES243 PVG → MXP May 19, 07:05 UTCMay 20, 05:40 UTC22h 36m
2026-05-19 CES243 PVG → MXP May 19, 05:55 UTCMay 20, 05:00 UTC23h 6m
2026-05-18 CES582 YVR → PVG May 18, 20:15 UTCMay 19, 07:35 UTC11h 20m
2026-05-18 CES581 PVG → YVR May 18, 06:45 UTCMay 18, 15:35 UTC8h 50m
2026-05-17 CES581 PVG → YVR May 17, 16:10 UTCMay 18, 15:00 UTC22h 50m
2026-05-17 CES710 MAD → PVG May 17, 13:05 UTCMay 18, 08:20 UTC19h 15m
2026-05-17 CES710 MAD → PVG May 17, 11:05 UTCMay 18, 08:20 UTC21h 15m
2026-05-17 CES710 MAD → PVG May 17, 09:30 UTCMay 18, 08:20 UTC22h 50m
2026-05-16 CES709 PVG → MAD May 16, 21:25 UTCMay 17, 05:30 UTC8h 5m
2026-05-16 CES709 PVG → MAD May 16, 01:20 UTCMay 17, 01:00 UTC23h 40m
2026-05-15 CES788 FCO → PVG May 15, 23:05 UTCMay 16, 21:55 UTC22h 50m
2026-05-15 CES788 FCO → PVG May 15, 19:30 UTCMay 16, 02:05 UTC6h 35m
2026-05-15 CES787 PVG → FCO May 15, 09:15 UTCMay 15, 16:35 UTC7h 19m
2026-05-14 CES542 BKK → PVG May 14, 06:45 UTCMay 14, 09:35 UTC2h 50m
2026-05-13 CES244 MXP → PVG May 13, 11:30 UTCMay 14, 04:55 UTC17h 25m
2026-05-12 CES243 PVG → MXP May 12, 22:31 UTCMay 13, 05:55 UTC7h 25m
2026-05-12 CES243 PVG → MXP May 12, 05:15 UTCMay 13, 05:00 UTC23h 45m
2026-05-12 CES523 PVG → NRT May 12, 02:45 UTCMay 12, 03:45 UTC1h 0m
2026-05-07 CES568 SIN → PVG May 7, 09:40 UTCMay 7, 13:20 UTC3h 40m
2026-05-06 CES250 BCN → PVG May 6, 11:05 UTCMay 7, 07:00 UTC19h 54m
2026-05-06 CES250 BCN → PVG May 6, 09:25 UTCMay 7, 07:00 UTC21h 34m
2026-05-06 CES249 PVG → BCN May 6, 04:40 UTCMay 6, 06:00 UTC1h 20m
2026-05-05 CES249 PVG → BCN May 5, 09:05 UTCMay 6, 04:35 UTC19h 30m
2026-05-05 CES249 PVG → BCN May 5, 08:40 UTCMay 6, 04:35 UTC19h 55m
2026-05-05 CES562 SYD → PVG May 5, 01:20 UTCMay 6, 01:01 UTC23h 40m
2026-05-04 CES561 PVG → SYD May 4, 21:40 UTCMay 4, 22:35 UTC55m
2026-05-04 CES561 PVG → SYD May 4, 01:10 UTCMay 4, 22:35 UTC21h 26m
2026-05-03 CES561 PVG → SYD May 3, 23:04 UTCMay 4, 22:35 UTC23h 31m
2026-05-03 CES788 FCO → PVG May 3, 19:20 UTCMay 4, 01:50 UTC6h 30m
2026-05-03 CES787 PVG → FCO May 3, 06:15 UTCMay 3, 17:00 UTC10h 45m
2026-05-02 CES524 NRT → PVG May 2, 05:20 UTCMay 2, 06:50 UTC1h 30m

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 8h ago.
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, CES250, CES243, CES261, CES710.