Apparatus

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sensors Mode-S transponder

781C44

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-221E · BOEING 737-800

Hex
781C44
Octal
36016104
Decimal
7,871,556
Country
CN
Tail
B-221E
Type
B738
No current signal · last broadcast 23h ago
Flights observed
68
Distinct callsigns
9
Country
CN
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S 781C44.

Country allocation

The ICAO 24-bit address 781C44 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 9 distinct

Callsign Airline Flights Last seen
LHA4204 - 28 2026-07-12
LHA4203 - 27 2026-07-12
LHA4116 - 4 2026-07-17
LHA4115 - 4 2026-07-17
LHA420W - 1 2026-07-15
LHA420V - 1 2026-07-15
LHA4120 Longhao Airlines 1 2026-05-23
LHA4119 Longhao Airlines 1 2026-05-22
LA4204 - 1 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 LHA4116 - Jul 17, 08:00 UTCJul 17, 08:54 UTC55m
2026-07-17 LHA4115 - Jul 17, 05:25 UTCJul 17, 06:25 UTC1h 0m
2026-07-15 LHA420V - Jul 15, 07:50 UTCJul 15, 08:05 UTC15m
2026-07-15 LHA420W - Jul 15, 05:50 UTCJul 15, 06:15 UTC25m
2026-07-12 LHA4204 - Jul 12, 04:35 UTCJul 12, 04:50 UTC15m
2026-07-12 LHA4203 - Jul 12, 02:55 UTCJul 12, 03:15 UTC20m
2026-07-08 LHA4204 - Jul 8, 07:05 UTCJul 8, 07:20 UTC15m
2026-07-08 LHA4203 - Jul 8, 04:45 UTCJul 8, 05:10 UTC25m
2026-07-05 LHA4204 - Jul 5, 05:20 UTCJul 5, 05:35 UTC15m
2026-07-05 LHA4203 - Jul 5, 03:50 UTCJul 5, 04:10 UTC20m
2026-07-02 LHA4204 - Jul 2, 05:05 UTCJul 2, 05:15 UTC10m
2026-07-02 LHA4203 - Jul 2, 03:30 UTCJul 2, 03:45 UTC15m
2026-07-01 LHA4204 - Jul 1, 05:25 UTCJul 1, 05:35 UTC10m
2026-07-01 LHA4203 - Jul 1, 03:05 UTCJul 1, 03:20 UTC15m
2026-06-29 LHA4204 - Jun 29, 04:55 UTCJun 29, 05:09 UTC15m
2026-06-29 LHA4203 - Jun 29, 03:25 UTCJun 29, 03:39 UTC15m
2026-06-28 LHA4204 - Jun 28, 04:59 UTCJun 28, 05:15 UTC15m
2026-06-28 LHA4203 - Jun 28, 02:49 UTCJun 28, 03:09 UTC20m
2026-06-27 LHA4204 - Jun 27, 04:54 UTCJun 27, 05:04 UTC10m
2026-06-27 LHA4203 - Jun 27, 02:45 UTCJun 27, 03:04 UTC20m
2026-06-26 LHA4204 - Jun 26, 06:15 UTCJun 26, 06:29 UTC15m
2026-06-26 LHA4203 - Jun 26, 04:10 UTCJun 26, 04:34 UTC25m
2026-06-24 LHA4204 - Jun 24, 06:15 UTCJun 24, 06:25 UTC10m
2026-06-24 LHA4203 - Jun 24, 04:05 UTCJun 24, 04:20 UTC15m
2026-06-23 LHA4204 - Jun 23, 05:15 UTCJun 23, 05:29 UTC15m
2026-06-23 LHA4203 - Jun 23, 03:09 UTCJun 23, 03:25 UTC15m
2026-06-21 LHA4204 - Jun 21, 04:54 UTCJun 21, 05:10 UTC15m
2026-06-21 LHA4203 - Jun 21, 02:45 UTCJun 21, 03:05 UTC20m
2026-06-19 LHA4204 - Jun 19, 04:54 UTCJun 19, 05:05 UTC10m
2026-06-19 LHA4203 - Jun 19, 03:05 UTCJun 19, 03:24 UTC20m
2026-06-18 LA4204 - Jun 18, 05:05 UTCJun 18, 05:20 UTC15m
2026-06-18 LHA4203 - Jun 18, 03:15 UTCJun 18, 03:40 UTC25m
2026-06-10 LHA4204 ICN → WEH Jun 10, 07:25 UTCJun 10, 07:40 UTC15m
2026-06-10 LHA4203 WEH → ICN Jun 10, 05:55 UTCJun 10, 06:15 UTC20m
2026-06-09 LHA4204 ICN → WEH Jun 9, 04:55 UTCJun 9, 05:10 UTC15m
2026-06-09 LHA4203 WEH → ICN Jun 9, 03:05 UTCJun 9, 03:25 UTC20m
2026-06-06 LHA4204 ICN → WEH Jun 6, 05:00 UTCJun 6, 05:10 UTC10m
2026-06-06 LHA4203 WEH → ICN Jun 6, 03:00 UTCJun 6, 03:25 UTC25m
2026-06-05 LHA4204 ICN → WEH Jun 5, 05:15 UTCJun 5, 05:30 UTC15m
2026-06-05 LHA4203 WEH → ICN Jun 5, 02:45 UTCJun 5, 03:05 UTC20m
2026-06-04 LHA4204 ICN → WEH Jun 4, 05:10 UTCJun 4, 05:25 UTC15m
2026-06-04 LHA4203 WEH → ICN Jun 4, 02:55 UTCJun 4, 03:10 UTC15m
2026-06-01 LHA4204 ICN → WEH Jun 1, 06:45 UTCJun 1, 06:55 UTC10m
2026-06-01 LHA4203 WEH → ICN Jun 1, 04:55 UTCJun 1, 05:25 UTC30m
2026-05-23 LHA4120 NRT → NGB May 23, 02:35 UTCMay 23, 04:05 UTC1h 30m
2026-05-22 LHA4119 NGB → NRT May 22, 23:45 UTCMay 23, 01:05 UTC1h 20m
2026-05-21 LHA4204 ICN → WEH May 21, 06:05 UTCMay 21, 06:20 UTC15m
2026-05-21 LHA4203 WEH → ICN May 21, 04:00 UTCMay 21, 04:15 UTC15m
2026-05-16 LHA4204 ICN → WEH May 16, 06:06 UTCMay 16, 06:20 UTC15m
2026-05-16 LHA4203 WEH → ICN May 16, 04:00 UTCMay 16, 04:15 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-221E page for operator, model, and routing details .

Mode-S 781C44 frequently asked

What is Mode-S code 781C44?
781C44 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-221E.
Where is Mode-S 781C44 registered?
Mode-S code 781C44 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C44 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C44, octal 36016104, decimal 7,871,556.
What flights does 781C44 operate?
Mode-S 781C44 has broadcast 9 distinct callsigns, including LHA4204, LHA4203, LHA4116, LHA4115, LHA420W.