Apparatus

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sensors Mode-S transponder

781CDE

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-221F · BOEING 767-300

Hex
781CDE
Octal
36016336
Decimal
7,871,710
Country
CN
Tail
B-221F
Type
B763
No current signal · last broadcast 1h ago
Flights observed
126
Distinct callsigns
13
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781CDE.

Country allocation

The ICAO 24-bit address 781CDE 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 13 distinct

Callsign Airline Flights Last seen
HYT9087 - 33 2026-06-14
HYT9091 - 20 2026-07-18
HYT9057 - 17 2026-07-10
HYT9088 - 16 2026-06-07
HYT9092 YTO Cargo Ltd 12 2026-07-18
HYT9085 - 8 2026-06-29
HYT9058 - 6 2026-07-02
HYT9086 - 4 2026-06-19
HYT9026 - 3 2026-06-26
HYT9025 - 2 2026-06-25
HYT9008 - 2 2026-06-24
HYT9007 - 2 2026-06-26
HYT9084 - 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 HYT9092 LHE → KMG Jul 18, 07:40 UTCJul 18, 08:50 UTC1h 10m
2026-07-18 HYT9091 - Jul 18, 04:45 UTCJul 18, 05:50 UTC1h 5m
2026-07-15 HYT9092 - Jul 15, 08:40 UTCJul 15, 09:55 UTC1h 15m
2026-07-15 HYT9091 - Jul 15, 05:00 UTCJul 15, 06:15 UTC1h 15m
2026-07-12 HYT9092 - Jul 12, 13:55 UTCJul 12, 15:10 UTC1h 15m
2026-07-12 HYT9091 - Jul 12, 10:45 UTCJul 12, 12:01 UTC1h 15m
2026-07-11 HYT9092 - Jul 11, 08:15 UTCJul 11, 09:00 UTC45m
2026-07-11 HYT9091 - Jul 11, 04:25 UTCJul 11, 05:40 UTC1h 15m
2026-07-10 HYT9091 - Jul 10, 09:35 UTCJul 11, 05:40 UTC20h 5m
2026-07-10 HYT9091 - Jul 10, 08:35 UTCJul 11, 05:40 UTC21h 5m
2026-07-10 HYT9057 - Jul 10, 05:20 UTCJul 10, 06:35 UTC1h 15m
2026-07-09 HYT9057 - Jul 9, 09:35 UTCJul 10, 06:35 UTC21h 0m
2026-07-09 HYT9057 - Jul 9, 08:45 UTCJul 10, 06:35 UTC21h 50m
2026-07-08 HYT9092 DAC → DAC Jul 8, 12:05 UTCJul 9, 06:20 UTC18h 15m
2026-07-08 HYT9091 - Jul 8, 09:25 UTCJul 8, 10:30 UTC1h 5m
2026-07-07 HYT9092 - Jul 7, 08:00 UTCJul 7, 09:10 UTC1h 10m
2026-07-07 HYT9091 - Jul 7, 04:20 UTCJul 7, 05:55 UTC1h 35m
2026-07-06 HYT9091 - Jul 6, 07:35 UTCJul 7, 05:55 UTC22h 20m
2026-07-06 HYT9091 - Jul 6, 04:45 UTCJul 6, 05:45 UTC1h 0m
2026-07-05 HYT9092 DAC → DAC Jul 5, 08:05 UTCJul 6, 05:45 UTC21h 40m
2026-07-05 HYT9091 - Jul 5, 05:05 UTCJul 5, 06:25 UTC1h 20m
2026-07-04 HYT9092 - Jul 4, 07:50 UTCJul 5, 05:30 UTC21h 40m
2026-07-04 HYT9091 - Jul 4, 04:45 UTCJul 4, 06:00 UTC1h 15m
2026-07-03 HYT9091 - Jul 3, 09:35 UTCJul 4, 06:00 UTC20h 25m
2026-07-03 HYT9057 - Jul 3, 05:50 UTCJul 3, 07:05 UTC1h 15m
2026-07-02 HYT9057 - Jul 2, 09:35 UTCJul 3, 07:05 UTC21h 30m
2026-07-02 HYT9058 DAC → DAC Jul 2, 08:55 UTCJul 3, 07:05 UTC22h 10m
2026-07-01 HYT9092 DAC → DAC Jul 1, 11:50 UTCJul 2, 06:51 UTC19h 1m
2026-07-01 HYT9091 - Jul 1, 04:35 UTCJul 1, 05:50 UTC1h 15m
2026-06-30 HYT9091 - Jun 30, 09:35 UTCJul 1, 05:50 UTC20h 15m
2026-06-30 HYT9091 DAC → DAC Jun 30, 08:55 UTCJul 1, 05:50 UTC20h 55m
2026-06-30 HYT9057 - Jun 30, 05:20 UTCJun 30, 06:35 UTC1h 15m
2026-06-29 HYT9058 DAC → DAC Jun 29, 07:44 UTCJun 30, 06:35 UTC22h 51m
2026-06-29 HYT9085 - Jun 29, 04:45 UTCJun 29, 06:05 UTC1h 20m
2026-06-28 HYT9085 DAC → DAC Jun 28, 10:35 UTCJun 29, 06:05 UTC19h 30m
2026-06-28 HYT9091 - Jun 28, 07:40 UTCJun 28, 08:34 UTC55m
2026-06-27 HYT9092 - Jun 27, 08:05 UTCJun 27, 08:49 UTC45m
2026-06-26 HYT9007 - Jun 26, 11:34 UTCJun 27, 06:50 UTC19h 15m
2026-06-26 HYT9026 - Jun 26, 09:35 UTCJun 27, 06:50 UTC21h 15m
2026-06-26 HYT9026 - Jun 26, 08:50 UTCJun 26, 12:00 UTC3h 10m
2026-06-25 HYT9025 - Jun 25, 22:29 UTCJun 26, 06:25 UTC7h 55m
2026-06-24 HYT9008 - Jun 24, 08:45 UTCJun 24, 09:15 UTC30m
2026-06-24 HYT9007 - Jun 24, 06:15 UTCJun 24, 06:55 UTC40m
2026-06-22 HYT9026 - Jun 22, 10:40 UTCJun 22, 13:49 UTC3h 10m
2026-06-22 HYT9025 - Jun 22, 06:25 UTCJun 22, 06:39 UTC15m
2026-06-21 HYT9008 - Jun 21, 08:35 UTCJun 21, 23:30 UTC14h 55m
2026-06-21 HYT9091 - Jun 21, 06:10 UTCJun 21, 06:50 UTC40m
2026-06-20 HYT9092 DAC → DAC Jun 20, 08:44 UTCJun 21, 06:50 UTC22h 5m
2026-06-20 HYT9091 - Jun 20, 04:54 UTCJun 20, 05:44 UTC50m
2026-06-19 HYT9086 DAC → DAC Jun 19, 10:24 UTCJun 20, 05:44 UTC19h 20m

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-221F page for operator, model, and routing details .

Mode-S 781CDE frequently asked

What is Mode-S code 781CDE?
781CDE is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-221F.
Where is Mode-S 781CDE registered?
Mode-S code 781CDE is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781CDE broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781CDE, octal 36016336, decimal 7,871,710.
What flights does 781CDE operate?
Mode-S 781CDE has broadcast 13 distinct callsigns, including HYT9087, HYT9091, HYT9057, HYT9088, HYT9092.