Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781EC9

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-222F · BOEING 757-200

Hex
781EC9
Octal
36017311
Decimal
7,872,201
Country
CN
Tail
B-222F
Type
B752
No current signal · last broadcast 2d ago
Flights observed
116
Distinct callsigns
4
Country
CN
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 781EC9.

Country allocation

The ICAO 24-bit address 781EC9 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 4 distinct

Callsign Airline Flights Last seen
HYT9051 - 50 2026-07-24
HYT9052 YTO Cargo Ltd 30 2026-07-24
HYT9053 - 19 2026-07-17
HYT9054 - 16 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 HYT9052 KUL → HGH Jul 24, 03:40 UTCJul 24, 04:20 UTC40m
2026-07-24 HYT9051 - Jul 24, 01:10 UTCJul 24, 01:55 UTC45m
2026-07-23 HYT9052 KUL → HGH Jul 23, 04:10 UTCJul 23, 04:50 UTC40m
2026-07-23 HYT9051 - Jul 23, 01:00 UTCJul 23, 01:40 UTC40m
2026-07-22 HYT9051 - Jul 22, 01:15 UTCJul 22, 01:55 UTC40m
2026-07-21 HYT9051 - Jul 21, 04:20 UTCJul 22, 01:55 UTC21h 35m
2026-07-21 HYT9052 KUL → HGH Jul 21, 03:55 UTCJul 22, 01:55 UTC22h 0m
2026-07-21 HYT9051 - Jul 21, 01:10 UTCJul 21, 01:50 UTC40m
2026-07-20 HYT9051 - Jul 20, 04:20 UTCJul 21, 01:50 UTC21h 30m
2026-07-20 HYT9052 ICN → ICN Jul 20, 04:05 UTCJul 21, 01:50 UTC21h 45m
2026-07-20 HYT9051 - Jul 20, 01:00 UTCJul 20, 01:40 UTC40m
2026-07-17 HYT9054 - Jul 17, 21:34 UTCJul 17, 23:14 UTC1h 40m
2026-07-17 HYT9053 ICN → MNL Jul 17, 04:10 UTCJul 17, 19:55 UTC15h 45m
2026-07-17 HYT9051 - Jul 17, 01:20 UTCJul 17, 01:55 UTC35m
2026-07-16 HYT9052 - Jul 16, 04:05 UTCJul 16, 04:45 UTC40m
2026-07-16 HYT9051 - Jul 16, 01:45 UTCJul 16, 02:25 UTC40m
2026-07-15 HYT9054 - Jul 15, 20:00 UTCJul 15, 21:35 UTC1h 35m
2026-07-15 HYT9053 - Jul 15, 16:20 UTCJul 15, 18:10 UTC1h 50m
2026-07-15 HYT9052 - Jul 15, 03:25 UTCJul 15, 04:10 UTC45m
2026-07-15 HYT9051 - Jul 15, 01:00 UTCJul 15, 01:40 UTC40m
2026-07-14 HYT9051 - Jul 14, 04:20 UTCJul 15, 01:40 UTC21h 19m
2026-07-14 HYT9052 ICN → ICN Jul 14, 03:45 UTCJul 15, 01:40 UTC21h 54m
2026-07-14 HYT9051 - Jul 14, 01:15 UTCJul 14, 02:00 UTC45m
2026-07-13 HYT9054 - Jul 13, 19:40 UTCJul 13, 21:15 UTC1h 35m
2026-07-13 HYT9053 - Jul 13, 05:35 UTCJul 13, 17:40 UTC12h 5m
2026-07-12 HYT9051 ICN → ICN Jul 12, 09:05 UTCJul 13, 03:40 UTC18h 35m
2026-07-10 HYT9051 - Jul 10, 01:00 UTCJul 10, 01:40 UTC40m
2026-07-09 HYT9052 - Jul 9, 03:25 UTCJul 9, 04:05 UTC40m
2026-07-09 HYT9051 - Jul 9, 01:05 UTCJul 9, 01:50 UTC45m
2026-07-08 HYT9054 - Jul 8, 18:55 UTCJul 8, 19:25 UTC30m
2026-07-08 HYT9053 - Jul 8, 16:40 UTCJul 8, 17:15 UTC35m
2026-07-08 HYT9052 - Jul 8, 05:55 UTCJul 8, 06:35 UTC40m
2026-07-08 HYT9051 - Jul 8, 01:05 UTCJul 8, 01:55 UTC50m
2026-07-07 HYT9052 ICN → ICN Jul 7, 03:55 UTCJul 8, 01:55 UTC22h 0m
2026-07-07 HYT9051 - Jul 7, 01:10 UTCJul 7, 01:55 UTC45m
2026-07-06 HYT9054 - Jul 6, 18:55 UTCJul 6, 20:10 UTC1h 15m
2026-07-06 HYT9053 ICN → MNL Jul 6, 04:20 UTCJul 6, 17:15 UTC12h 55m
2026-07-06 HYT9051 - Jul 6, 01:35 UTCJul 6, 02:15 UTC40m
2026-07-04 HYT9054 - Jul 4, 19:20 UTCJul 4, 20:35 UTC1h 15m
2026-07-04 HYT9053 - Jul 4, 16:00 UTCJul 4, 17:25 UTC1h 25m
2026-07-03 HYT9053 - Jul 3, 20:20 UTCJul 4, 17:25 UTC21h 5m
2026-07-03 HYT9054 - Jul 3, 19:30 UTCJul 4, 17:25 UTC21h 55m
2026-07-03 HYT9053 ICN → MNL Jul 3, 03:40 UTCJul 3, 18:05 UTC14h 25m
2026-07-03 HYT9051 - Jul 3, 01:05 UTCJul 3, 01:55 UTC50m
2026-07-02 HYT9051 - Jul 2, 03:30 UTCJul 3, 01:55 UTC22h 25m
2026-07-02 HYT9051 - Jul 2, 01:10 UTCJul 2, 01:45 UTC35m
2026-07-01 HYT9054 - Jul 1, 19:00 UTCJul 1, 20:25 UTC1h 25m
2026-07-01 HYT9053 - Jul 1, 15:55 UTCJul 1, 17:20 UTC1h 25m
2026-07-01 HYT9052 - Jul 1, 03:50 UTCJul 1, 04:35 UTC45m
2026-07-01 HYT9051 - Jul 1, 01:00 UTCJul 1, 01:40 UTC40m

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-222F page for operator, model, and routing details .

Mode-S 781EC9 frequently asked

What is Mode-S code 781EC9?
781EC9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-222F.
Where is Mode-S 781EC9 registered?
Mode-S code 781EC9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781EC9 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781EC9, octal 36017311, decimal 7,872,201.
What flights does 781EC9 operate?
Mode-S 781EC9 has broadcast 4 distinct callsigns, including HYT9051, HYT9052, HYT9053, HYT9054.