Apparatus

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sensors Mode-S transponder

781EC3

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-32D3 · AIRBUS A-350-900

Hex
781EC3
Octal
36017303
Decimal
7,872,195
Country
CN
Tail
B-32D3
Type
A359
No current signal · last broadcast 1h ago
Flights observed
163
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 781EC3.

Country allocation

The ICAO 24-bit address 781EC3 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 20 distinct

Callsign Airline Flights Last seen
CCA424 - 15 2026-06-28
CCA446 - 12 2026-07-04
CCA949 Air China 11 2026-07-03
CCA445 - 11 2026-07-07
CCA950 Air China 9 2026-07-08
CCA935 - 9 2026-07-02
CCA852 Air China 9 2026-06-02
CCA423 Air China 8 2026-06-27
CCA848 Air China 6 2026-05-31
CCA878 - 4 2026-07-12
CCA877 - 4 2026-07-11
CCA1384 - 4 2026-06-21
CCA968 Air China 3 2026-07-01
CCA936 Air China 3 2026-07-02
CCA851 Air China 3 2026-06-01
CCA847 Air China 3 2026-05-28
CCA842 Air China 3 2026-06-13
CCA841 Air China 3 2026-06-12
CCA967 - 2 2026-06-30
CCA876 Air China 2 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CCA632 - Jul 14, 19:40 UTCJul 14, 22:35 UTC2h 55m
2026-07-14 CCA631 - Jul 14, 09:50 UTCJul 14, 16:35 UTC6h 45m
2026-07-14 CCA631 - Jul 14, 06:40 UTCJul 14, 06:50 UTC10m
2026-07-14 CCA570 - Jul 14, 03:50 UTCJul 14, 04:15 UTC25m
2026-07-13 CCA570 - Jul 13, 20:35 UTCJul 14, 01:25 UTC4h 50m
2026-07-13 CCA569 - Jul 13, 12:45 UTCJul 13, 17:50 UTC5h 5m
2026-07-13 CCA1421 - Jul 13, 00:45 UTCJul 13, 01:05 UTC20m
2026-07-12 CCA1724 - Jul 12, 12:10 UTCJul 12, 12:20 UTC10m
2026-07-12 CCA878 - Jul 12, 01:25 UTCJul 12, 01:45 UTC20m
2026-07-11 CCA878 - Jul 11, 17:25 UTCJul 11, 22:55 UTC5h 30m
2026-07-11 CCA877 - Jul 11, 08:50 UTCJul 11, 14:20 UTC5h 30m
2026-07-11 CCA877 - Jul 11, 05:55 UTCJul 11, 06:05 UTC10m
2026-07-11 CCA878 - Jul 11, 01:00 UTCJul 11, 01:20 UTC20m
2026-07-10 CCA878 - Jul 10, 17:20 UTCJul 10, 22:35 UTC5h 16m
2026-07-10 CCA877 - Jul 10, 09:20 UTCJul 10, 15:05 UTC5h 45m
2026-07-10 CCA877 - Jul 10, 06:25 UTCJul 10, 06:35 UTC10m
2026-07-10 CCA572 - Jul 10, 03:25 UTCJul 10, 03:55 UTC30m
2026-07-09 CCA572 - Jul 9, 17:25 UTCJul 10, 00:55 UTC7h 30m
2026-07-09 CCA571 - Jul 9, 06:40 UTCJul 9, 14:05 UTC7h 25m
2026-07-09 CCA571 - Jul 9, 03:30 UTCJul 9, 03:45 UTC15m
2026-07-08 CCA950 MXP → PEK Jul 8, 20:45 UTCJul 8, 21:05 UTC20m
2026-07-08 CCA950 MXP → PEK Jul 8, 12:00 UTCJul 8, 18:30 UTC6h 30m
2026-07-07 CCA445 - Jul 7, 21:30 UTCJul 8, 04:10 UTC6h 40m
2026-07-06 CCA458 - Jul 6, 12:05 UTCJul 6, 18:40 UTC6h 35m
2026-07-05 CCA457 - Jul 5, 21:30 UTCJul 6, 04:10 UTC6h 40m
2026-07-04 CCA446 - Jul 4, 11:40 UTCJul 4, 18:05 UTC6h 25m
2026-07-03 CCA949 PEK → MXP Jul 3, 18:15 UTCJul 4, 04:10 UTC9h 55m
2026-07-02 CCA936 FRA → PVG Jul 2, 18:05 UTCJul 3, 02:35 UTC8h 30m
2026-07-02 CCA935 - Jul 2, 08:20 UTCJul 2, 14:50 UTC6h 30m
2026-07-01 CCA935 - Jul 1, 17:30 UTCJul 2, 14:50 UTC21h 20m
2026-07-01 CCA935 - Jul 1, 15:20 UTCJul 2, 14:45 UTC23h 25m
2026-07-01 CCA968 MXP → PVG Jul 1, 12:50 UTCJul 2, 11:55 UTC23h 5m
2026-07-01 CCA968 MXP → PVG Jul 1, 11:55 UTCJul 2, 08:50 UTC20h 55m
2026-06-30 CCA967 - Jun 30, 12:55 UTCJul 1, 05:30 UTC16h 35m
2026-06-30 CCA967 - Jun 30, 09:50 UTCJul 1, 05:30 UTC19h 40m
2026-06-29 CCA968 MXP → PVG Jun 29, 13:19 UTCJun 30, 07:30 UTC18h 11m
2026-06-28 CCA445 - Jun 28, 21:34 UTCJun 29, 04:09 UTC6h 35m
2026-06-28 CCA424 - Jun 28, 03:00 UTCJun 28, 22:20 UTC19h 20m
2026-06-28 CCA424 - Jun 28, 00:50 UTCJun 28, 22:20 UTC21h 30m
2026-06-27 CCA424 - Jun 27, 22:49 UTCJun 28, 22:20 UTC23h 30m
2026-06-27 CCA424 - Jun 27, 21:19 UTCJun 28, 03:45 UTC6h 25m
2026-06-27 CCA423 TFU → LHR Jun 27, 11:39 UTCJun 27, 18:35 UTC6h 55m
2026-06-25 CCA446 - Jun 25, 11:39 UTCJun 25, 18:24 UTC6h 45m
2026-06-24 CCA949 PEK → MXP Jun 24, 20:49 UTCJun 25, 03:34 UTC6h 45m
2026-06-24 CCA1407 - Jun 24, 09:45 UTCJun 24, 10:10 UTC25m
2026-06-23 CCA4104 - Jun 23, 11:04 UTCJun 23, 11:29 UTC25m
2026-06-22 CCA862 - Jun 22, 11:50 UTCJun 22, 21:10 UTC9h 20m
2026-06-21 CCA861 - Jun 21, 21:54 UTCJun 22, 04:59 UTC7h 5m
2026-06-21 CCA861 - Jun 21, 19:00 UTCJun 21, 19:09 UTC10m
2026-06-21 CCA1384 - Jun 21, 11:00 UTCJun 21, 11:10 UTC10m

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-32D3 page for operator, model, and routing details .

Mode-S 781EC3 frequently asked

What is Mode-S code 781EC3?
781EC3 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-32D3.
Where is Mode-S 781EC3 registered?
Mode-S code 781EC3 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781EC3 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 781EC3, octal 36017303, decimal 7,872,195.
What flights does 781EC3 operate?
Mode-S 781EC3 has broadcast 20 distinct callsigns, including CCA424, CCA446, CCA949, CCA445, CCA950.