Apparatus

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sensors Mode-S transponder

781AE4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-220L · BOEING 737-800

Hex
781AE4
Octal
36015344
Decimal
7,871,204
Country
CN
Tail
B-220L
Type
B738
No current signal · last broadcast 14d ago
Flights observed
35
Distinct callsigns
6
Country
CN
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S 781AE4.

Country allocation

The ICAO 24-bit address 781AE4 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 6 distinct

Callsign Airline Flights Last seen
LHA4120 - 12 2026-07-02
LHA4119 - 7 2026-07-02
LHA4116 - 7 2026-07-02
LHA4203 - 5 2026-06-25
LHA4204 - 3 2026-06-25
LHA4115 - 1 2026-06-03

Recent flights last 35

DateFlightRouteTakeoffLandingDuration
2026-07-02 LHA4116 - Jul 2, 22:25 UTCJul 2, 23:25 UTC1h 0m
2026-07-02 LHA4120 - Jul 2, 05:45 UTCJul 2, 21:25 UTC15h 40m
2026-07-02 LHA4119 - Jul 2, 02:45 UTCJul 2, 04:15 UTC1h 30m
2026-06-25 LHA4204 - Jun 25, 05:29 UTCJun 25, 05:44 UTC15m
2026-06-25 LHA4203 - Jun 25, 03:10 UTCJun 25, 03:40 UTC30m
2026-06-20 LHA4204 - Jun 20, 05:04 UTCJun 20, 05:19 UTC15m
2026-06-20 LHA4203 - Jun 20, 02:49 UTCJun 20, 03:19 UTC30m
2026-06-18 LHA4116 - Jun 18, 22:20 UTCJun 18, 23:20 UTC1h 0m
2026-06-18 LHA4120 NRT → NGB Jun 18, 03:05 UTCJun 18, 21:15 UTC18h 10m
2026-06-18 LHA4120 NRT → NGB Jun 18, 02:45 UTCJun 18, 21:15 UTC18h 30m
2026-06-17 LHA4119 NGB → NRT Jun 17, 23:25 UTCJun 18, 01:00 UTC1h 35m
2026-06-16 LHA4116 - Jun 16, 22:55 UTCJun 16, 23:55 UTC1h 0m
2026-06-16 LHA4120 NRT → NGB Jun 16, 03:04 UTCJun 16, 21:35 UTC18h 31m
2026-06-16 LHA4120 NRT → NGB Jun 16, 02:45 UTCJun 16, 21:35 UTC18h 51m
2026-06-15 LHA4119 NGB → NRT Jun 15, 23:39 UTCJun 16, 01:10 UTC1h 30m
2026-06-13 LHA4116 - Jun 13, 22:25 UTCJun 13, 23:30 UTC1h 5m
2026-06-13 LHA4120 NRT → NGB Jun 13, 03:05 UTCJun 13, 21:10 UTC18h 4m
2026-06-13 LHA4120 NRT → NGB Jun 13, 02:30 UTCJun 13, 21:10 UTC18h 39m
2026-06-12 LHA4119 NGB → NRT Jun 12, 23:30 UTCJun 13, 01:00 UTC1h 30m
2026-06-11 LHA4116 KIX → NGB Jun 11, 22:20 UTCJun 11, 23:15 UTC55m
2026-06-11 LHA4120 NRT → NGB Jun 11, 03:05 UTCJun 11, 21:10 UTC18h 5m
2026-06-11 LHA4120 NRT → NGB Jun 11, 02:40 UTCJun 11, 21:10 UTC18h 30m
2026-06-10 LHA4119 NGB → NRT Jun 10, 23:30 UTCJun 11, 00:50 UTC1h 20m
2026-06-06 LHA4116 KIX → NGB Jun 6, 22:44 UTCJun 6, 23:30 UTC45m
2026-06-06 LHA4120 NRT → NGB Jun 6, 03:05 UTCJun 6, 21:20 UTC18h 15m
2026-06-06 LHA4120 NRT → NGB Jun 6, 02:40 UTCJun 6, 21:20 UTC18h 40m
2026-06-05 LHA4119 NGB → NRT Jun 5, 23:30 UTCJun 6, 00:45 UTC1h 15m
2026-06-03 LHA4116 KIX → NGB Jun 3, 22:50 UTCJun 3, 23:40 UTC50m
2026-06-03 LHA4115 - Jun 3, 21:10 UTCJun 3, 21:50 UTC40m
2026-06-02 LHA4120 NRT → NGB Jun 2, 04:05 UTCJun 2, 05:30 UTC1h 25m
2026-06-01 LHA4119 NGB → NRT Jun 1, 23:40 UTCJun 2, 01:05 UTC1h 25m
2026-05-02 LHA4204 ICN → WEH May 2, 06:25 UTCMay 2, 06:35 UTC10m
2026-04-30 LHA4203 WEH → ICN Apr 30, 03:10 UTCApr 30, 03:25 UTC15m
2026-04-28 LHA4203 WEH → ICN Apr 28, 03:15 UTCApr 28, 03:25 UTC10m
2026-04-25 LHA4203 WEH → ICN Apr 25, 03:00 UTCApr 25, 03:15 UTC15m

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-220L page for operator, model, and routing details .

Mode-S 781AE4 frequently asked

What is Mode-S code 781AE4?
781AE4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-220L.
Where is Mode-S 781AE4 registered?
Mode-S code 781AE4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781AE4 broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781AE4, octal 36015344, decimal 7,871,204.
What flights does 781AE4 operate?
Mode-S 781AE4 has broadcast 6 distinct callsigns, including LHA4120, LHA4119, LHA4116, LHA4203, LHA4204.