Apparatus

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sensors Mode-S transponder

781581

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-304D · AIRBUS A-350-900

Hex
781581
Octal
36012601
Decimal
7,869,825
Country
CN
Tail
B-304D
Type
A359
No current signal · last broadcast 11h ago
Flights observed
178
Distinct callsigns
20
Country
CN
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 781581.

Country allocation

The ICAO 24-bit address 781581 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 22 2026-06-22
CES250 China Eastern Airlines 18 2026-06-23
CES709 China Eastern Airlines 15 2026-07-03
CES7235 - 11 2026-07-02
CES710 - 11 2026-07-04
CES788 China Eastern Airlines 9 2026-06-11
CES787 China Eastern Airlines 8 2026-06-11
CES736 - 8 2026-06-26
CES735 China Eastern Airlines 7 2026-06-25
CES7236 - 7 2026-07-03
CES5341 - 7 2026-07-14
CES561 China Eastern Airlines 6 2026-05-22
CES562 China Eastern Airlines 5 2026-05-23
CES243 China Eastern Airlines 5 2026-06-30
CES223 China Eastern Airlines 5 2026-05-05
CES524 China Eastern Airlines 4 2026-05-27
CES224 China Eastern Airlines 4 2026-05-05
CES218 - 4 2026-06-29
CES217 - 4 2026-06-28
CES541 China Eastern Airlines 3 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CES5350 - Jul 14, 11:00 UTCJul 14, 11:10 UTC10m
2026-07-14 CES5341 - Jul 14, 09:05 UTCJul 14, 09:40 UTC35m
2026-07-13 CES5316 - Jul 13, 07:30 UTCJul 13, 07:40 UTC10m
2026-07-12 CES5316 - Jul 12, 07:20 UTCJul 12, 07:31 UTC10m
2026-07-10 CES5350 - Jul 10, 11:15 UTCJul 10, 12:05 UTC50m
2026-07-10 CES5341 - Jul 10, 09:10 UTCJul 10, 09:45 UTC35m
2026-07-09 CES5341 - Jul 9, 11:25 UTCJul 9, 12:10 UTC45m
2026-07-07 CES5341 - Jul 7, 10:20 UTCJul 7, 11:15 UTC55m
2026-07-06 CES5350 - Jul 6, 14:45 UTCJul 6, 14:55 UTC10m
2026-07-06 CES5341 - Jul 6, 11:45 UTCJul 6, 12:00 UTC15m
2026-07-06 CES5341 - Jul 6, 10:45 UTCJul 6, 10:55 UTC10m
2026-07-05 CES5341 - Jul 5, 13:30 UTCJul 6, 10:55 UTC21h 25m
2026-07-04 CES710 - Jul 4, 09:30 UTCJul 4, 17:05 UTC7h 35m
2026-07-03 CES709 PVG → MAD Jul 3, 19:10 UTCJul 4, 06:30 UTC11h 20m
2026-07-03 CES709 PVG → MAD Jul 3, 04:55 UTCJul 4, 04:15 UTC23h 20m
2026-07-03 CES7236 - Jul 3, 00:20 UTCJul 3, 23:05 UTC22h 45m
2026-07-02 CES7236 - Jul 2, 22:20 UTCJul 3, 19:35 UTC21h 15m
2026-07-02 CES7235 - Jul 2, 08:10 UTCJul 2, 19:10 UTC11h 0m
2026-07-01 CES7235 - Jul 1, 22:20 UTCJul 2, 19:10 UTC20h 50m
2026-07-01 CES7235 - Jul 1, 19:05 UTCJul 2, 18:15 UTC23h 10m
2026-07-01 CES7235 - Jul 1, 16:35 UTCJul 2, 16:15 UTC23h 40m
2026-07-01 CES244 MXP → PVG Jul 1, 13:35 UTCJul 2, 11:55 UTC22h 20m
2026-06-30 CES243 PVG → MXP Jun 30, 13:25 UTCJul 1, 05:30 UTC16h 5m
2026-06-30 CES243 PVG → MXP Jun 30, 09:35 UTCJul 1, 05:30 UTC19h 55m
2026-06-29 CES218 - Jun 29, 12:20 UTCJun 30, 07:45 UTC19h 26m
2026-06-29 CES218 - Jun 29, 10:40 UTCJun 30, 07:45 UTC21h 6m
2026-06-28 CES217 - Jun 28, 22:15 UTCJun 29, 05:20 UTC7h 5m
2026-06-28 CES217 - Jun 28, 05:09 UTCJun 29, 04:14 UTC23h 5m
2026-06-28 CES7236 - Jun 28, 02:29 UTCJun 29, 01:29 UTC23h 0m
2026-06-28 CES7236 - Jun 28, 00:20 UTCJun 28, 22:59 UTC22h 40m
2026-06-27 CES7236 - Jun 27, 22:25 UTCJun 28, 22:15 UTC23h 50m
2026-06-27 CES7235 - Jun 27, 08:20 UTCJun 27, 19:05 UTC10h 45m
2026-06-26 CES7235 - Jun 26, 18:20 UTCJun 27, 18:15 UTC23h 55m
2026-06-26 CES7235 - Jun 26, 17:40 UTCJun 27, 16:14 UTC22h 35m
2026-06-26 CES736 - Jun 26, 10:44 UTCJun 27, 08:29 UTC21h 45m
2026-06-25 CES735 PVG → SYD Jun 25, 09:50 UTCJun 26, 02:20 UTC16h 30m
2026-06-24 CES567 - Jun 24, 12:25 UTCJun 25, 07:34 UTC19h 10m
2026-06-24 CES568 - Jun 24, 09:24 UTCJun 25, 07:34 UTC22h 10m
2026-06-23 CES250 BCN → PVG Jun 23, 12:20 UTCJun 24, 07:10 UTC18h 50m
2026-06-23 CES250 BCN → PVG Jun 23, 10:19 UTCJun 24, 07:10 UTC20h 50m
2026-06-23 CES250 BCN → PVG Jun 23, 09:20 UTCJun 24, 07:10 UTC21h 50m
2026-06-22 CES249 PVG → BCN Jun 22, 18:40 UTCJun 23, 05:15 UTC10h 35m
2026-06-22 CES249 PVG → BCN Jun 22, 06:19 UTCJun 23, 05:15 UTC22h 55m
2026-06-22 CES249 PVG → BCN Jun 22, 05:24 UTCJun 23, 04:14 UTC22h 50m
2026-06-21 CES710 MAD → NRT Jun 21, 09:35 UTCJun 22, 04:00 UTC18h 25m
2026-06-20 CES709 PVG → MAD Jun 20, 18:29 UTCJun 21, 05:40 UTC11h 10m
2026-06-18 CES244 MXP → PVG Jun 18, 11:25 UTCJun 18, 18:15 UTC6h 50m
2026-06-17 CES243 PVG → MXP Jun 17, 22:35 UTCJun 18, 05:30 UTC6h 55m
2026-06-17 CES568 - Jun 17, 10:05 UTCJun 17, 10:20 UTC15m
2026-06-17 CES567 - Jun 17, 03:35 UTCJun 17, 07:35 UTC4h 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-304D page for operator, model, and routing details .

Mode-S 781581 frequently asked

What is Mode-S code 781581?
781581 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-304D.
Where is Mode-S 781581 registered?
Mode-S code 781581 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781581 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781581, octal 36012601, decimal 7,869,825.
What flights does 781581 operate?
Mode-S 781581 has broadcast 20 distinct callsigns, including CES249, CES250, CES709, CES7235, CES710.