Apparatus

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sensors Mode-S transponder

781ECA

ICAO 24-bit transponder address · allocated to China

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

Hex
781ECA
Octal
36017312
Decimal
7,872,202
Country
CN
Tail
B-222G
Type
B752
No current signal · last broadcast 53m ago
Flights observed
127
Distinct callsigns
15
Country
CN
Last broadcast
53m ago

Last known position

Most recent position reported by Mode-S 781ECA.

Country allocation

The ICAO 24-bit address 781ECA 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 15 distinct

Callsign Airline Flights Last seen
HYT9103 - 29 2026-07-13
HYT9104 - 19 2026-07-13
HYT9068 - 12 2026-07-13
HYT9157 - 11 2026-07-11
HYT9130 - 10 2026-07-10
HYT9158 - 8 2026-07-11
HYT9129 - 7 2026-06-24
HYT9067 - 7 2026-07-13
HYT9089 YTO Cargo Ltd 6 2026-05-23
HYT9075 - 6 2026-07-08
HYT9076 - 4 2026-07-07
HYT9090 YTO Cargo Ltd 3 2026-05-23
HYT9084 - 2 2026-06-17
HYT9083 - 2 2026-06-16
HYT9091 - 1 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 HYT9068 - Jul 13, 10:35 UTCJul 14, 10:20 UTC23h 45m
2026-07-13 HYT9067 - Jul 13, 09:20 UTCJul 14, 08:30 UTC23h 10m
2026-07-13 HYT9104 - Jul 13, 07:45 UTCJul 13, 07:55 UTC10m
2026-07-13 HYT9103 - Jul 13, 05:15 UTCJul 13, 05:35 UTC20m
2026-07-13 HYT9103 - Jul 13, 02:20 UTCJul 13, 04:05 UTC1h 45m
2026-07-11 HYT9158 - Jul 11, 06:55 UTCJul 11, 09:30 UTC2h 35m
2026-07-11 HYT9157 - Jul 11, 02:25 UTCJul 11, 05:31 UTC3h 5m
2026-07-10 HYT9157 - Jul 10, 08:35 UTCJul 11, 05:31 UTC20h 56m
2026-07-10 HYT9157 - Jul 10, 08:05 UTCJul 11, 05:31 UTC21h 26m
2026-07-10 HYT9130 - Jul 10, 04:35 UTCJul 11, 04:30 UTC23h 56m
2026-07-10 HYT9130 - Jul 10, 02:55 UTCJul 11, 02:30 UTC23h 36m
2026-07-09 HYT9130 - Jul 9, 12:35 UTCJul 10, 10:15 UTC21h 40m
2026-07-09 HYT9130 - Jul 9, 10:40 UTCJul 10, 10:15 UTC23h 35m
2026-07-09 HYT9068 - Jul 9, 08:50 UTCJul 10, 08:30 UTC23h 40m
2026-07-09 HYT9068 - Jul 9, 04:35 UTCJul 10, 04:30 UTC23h 55m
2026-07-09 HYT9068 - Jul 9, 02:55 UTCJul 9, 12:40 UTC9h 45m
2026-07-08 HYT9068 - Jul 8, 15:10 UTCJul 9, 12:40 UTC21h 30m
2026-07-08 HYT9075 - Jul 8, 11:25 UTCJul 8, 14:05 UTC2h 40m
2026-07-07 HYT9076 - Jul 7, 16:30 UTCJul 7, 17:40 UTC1h 10m
2026-07-07 HYT9130 - Jul 7, 02:00 UTCJul 7, 15:20 UTC13h 20m
2026-07-05 HYT9068 - Jul 5, 01:00 UTCJul 5, 10:30 UTC9h 30m
2026-07-02 HYT9104 - Jul 2, 08:10 UTCJul 2, 11:35 UTC3h 25m
2026-07-02 HYT9103 - Jul 2, 04:50 UTCJul 2, 05:10 UTC20m
2026-07-01 HYT9104 - Jul 1, 09:35 UTCJul 2, 03:35 UTC18h 0m
2026-07-01 HYT9104 - Jul 1, 08:00 UTCJul 1, 08:10 UTC10m
2026-07-01 HYT9103 - Jul 1, 05:15 UTCJul 1, 05:35 UTC20m
2026-06-30 HYT9068 - Jun 30, 08:55 UTCJul 1, 03:55 UTC19h 0m
2026-06-30 HYT9068 - Jun 30, 02:35 UTCJul 1, 02:30 UTC23h 55m
2026-06-30 HYT9067 - Jun 30, 00:49 UTCJun 30, 10:45 UTC9h 56m
2026-06-29 HYT9067 - Jun 29, 10:34 UTCJun 30, 10:30 UTC23h 56m
2026-06-29 HYT9067 - Jun 29, 09:40 UTCJun 30, 04:05 UTC18h 25m
2026-06-29 HYT9104 - Jun 29, 08:04 UTCJun 30, 04:05 UTC20h 0m
2026-06-29 HYT9103 - Jun 29, 05:59 UTCJun 29, 06:24 UTC25m
2026-06-28 HYT9103 - Jun 28, 10:35 UTCJun 29, 04:50 UTC18h 15m
2026-06-28 HYT9104 - Jun 28, 09:34 UTCJun 29, 04:50 UTC19h 15m
2026-06-28 HYT9103 - Jun 28, 05:45 UTCJun 28, 06:05 UTC20m
2026-06-27 HYT9103 - Jun 27, 08:35 UTCJun 28, 04:29 UTC19h 55m
2026-06-27 HYT9158 - Jun 27, 06:35 UTCJun 28, 04:29 UTC21h 55m
2026-06-27 HYT9158 - Jun 27, 06:25 UTCJun 28, 04:29 UTC22h 5m
2026-06-27 HYT9157 - Jun 27, 03:09 UTCJun 27, 05:10 UTC2h 0m
2026-06-26 HYT9157 - Jun 26, 09:14 UTCJun 27, 05:10 UTC19h 55m
2026-06-25 HYT9130 - Jun 25, 06:35 UTCJun 26, 05:05 UTC22h 30m
2026-06-25 HYT9130 - Jun 25, 00:24 UTCJun 25, 08:24 UTC8h 0m
2026-06-24 HYT9129 - Jun 24, 07:20 UTCJun 25, 06:30 UTC23h 10m
2026-06-24 HYT9091 - Jun 24, 05:09 UTCJun 24, 05:49 UTC40m
2026-06-22 HYT9104 - Jun 22, 07:34 UTCJun 22, 10:19 UTC2h 45m
2026-06-22 HYT9103 - Jun 22, 05:44 UTCJun 22, 06:10 UTC25m
2026-06-22 HYT9103 - Jun 22, 03:30 UTCJun 22, 04:34 UTC1h 5m
2026-06-21 HYT9158 - Jun 21, 06:35 UTCJun 22, 04:34 UTC22h 0m
2026-06-21 HYT9158 - Jun 21, 06:14 UTCJun 22, 04:30 UTC22h 15m

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

Mode-S 781ECA frequently asked

What is Mode-S code 781ECA?
781ECA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-222G.
Where is Mode-S 781ECA registered?
Mode-S code 781ECA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781ECA broadcasting right now?
No active broadcast right now. Last signal was 53m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781ECA, octal 36017312, decimal 7,872,202.
What flights does 781ECA operate?
Mode-S 781ECA has broadcast 15 distinct callsigns, including HYT9103, HYT9104, HYT9068, HYT9157, HYT9130.