Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781C3E

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-325M · AIRBUS A-321neo

Hex
781C3E
Octal
36016076
Decimal
7,871,550
Country
CN
Tail
B-325M
Type
A21N
No current signal · last broadcast Jul 26, 12:10 UTC
Flights observed
185
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:10 UTC

Last known position

Most recent position reported by Mode-S 781C3E.

Country allocation

The ICAO 24-bit address 781C3E 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
CCA741 - 11 2026-07-10
CCA1737 - 10 2026-07-06
CCA742 - 9 2026-07-10
CCA1738 - 9 2026-07-06
CCA1931 - 7 2026-07-17
CCA1734 - 7 2026-07-06
CCA1733 - 7 2026-07-06
CCA133 Air China 6 2026-07-23
CCA134 Air China 5 2026-07-23
CCA109 Air China 5 2026-07-25
CCA1202 Air China 4 2026-06-04
CCA110 - 4 2026-07-18
CCA809 - 3 2026-07-14
CCA1932 Air China 3 2026-07-18
CCA1919 Air China 3 2026-06-11
CCA1915 Air China 3 2026-06-04
CCA1728 - 3 2026-07-14
CCA1635 Air China 3 2026-05-17
CCA1821 - 2 2026-07-13
CCA1607 - 2 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA110D - Jul 26, 11:55 UTCJul 26, 12:10 UTC15m
2026-07-26 CCA109D - Jul 26, 09:50 UTCJul 26, 10:00 UTC10m
2026-07-25 CCA109 PEK → HKG Jul 25, 05:10 UTCJul 25, 07:55 UTC2h 45m
2026-07-25 CCA1846 HFE → PEK Jul 25, 01:55 UTCJul 25, 02:10 UTC15m
2026-07-24 CCA1845 PEK → HFE Jul 24, 13:20 UTCJul 24, 13:45 UTC25m
2026-07-24 CCA811 PEK → VVO Jul 24, 06:10 UTCJul 24, 06:20 UTC10m
2026-07-23 CCA1730 PEK → HGH Jul 23, 13:30 UTCJul 23, 13:40 UTC10m
2026-07-23 CCA134 HND → PEK Jul 23, 07:20 UTCJul 23, 09:25 UTC2h 5m
2026-07-23 CCA133 PEK → HND Jul 23, 02:15 UTCJul 23, 05:20 UTC3h 5m
2026-07-21 CCA1237 - Jul 21, 22:25 UTCJul 21, 22:45 UTC20m
2026-07-21 CCA1718 PEK → HGH Jul 21, 07:20 UTCJul 21, 07:35 UTC15m
2026-07-21 CCA9844 - Jul 21, 05:05 UTCJul 21, 05:25 UTC20m
2026-07-20 CCA9843 - Jul 20, 23:00 UTCJul 20, 23:20 UTC20m
2026-07-20 CCA1710 PEK → HGH Jul 20, 03:05 UTCJul 20, 03:15 UTC10m
2026-07-19 CCA1732 SZX → HGH Jul 19, 15:55 UTCJul 19, 16:05 UTC10m
2026-07-19 CCA1232 - Jul 19, 04:15 UTCJul 19, 04:45 UTC30m
2026-07-18 CCA1231 - Jul 18, 23:35 UTCJul 18, 23:50 UTC15m
2026-07-18 CCA110 - Jul 18, 10:25 UTCJul 18, 10:45 UTC20m
2026-07-18 CCA109 - Jul 18, 05:50 UTCJul 18, 08:50 UTC3h 0m
2026-07-18 CCA1932 NNG → PEK Jul 18, 02:50 UTCJul 18, 03:05 UTC15m
2026-07-17 CCA1931 - Jul 17, 12:10 UTCJul 17, 12:19 UTC10m
2026-07-16 CCA1561 - Jul 16, 06:40 UTCJul 16, 06:50 UTC10m
2026-07-15 CCA1343 - Jul 15, 22:55 UTCJul 15, 23:15 UTC20m
2026-07-15 CCA1129 - Jul 15, 13:15 UTCJul 15, 13:30 UTC15m
2026-07-15 CCA134 - Jul 15, 08:10 UTCJul 15, 10:15 UTC2h 5m
2026-07-15 CCA133 - Jul 15, 04:20 UTCJul 15, 06:20 UTC2h 0m
2026-07-14 CCA1728 - Jul 14, 12:00 UTCJul 14, 12:15 UTC15m
2026-07-14 CCA809 - Jul 14, 03:20 UTCJul 14, 03:30 UTC10m
2026-07-13 CCA1821 - Jul 13, 13:35 UTCJul 13, 13:50 UTC15m
2026-07-13 CCA1541 - Jul 13, 05:50 UTCJul 13, 06:01 UTC10m
2026-07-13 CCA1248 - Jul 13, 02:55 UTCJul 13, 03:20 UTC25m
2026-07-12 CCA1247 - Jul 12, 12:40 UTCJul 12, 13:05 UTC25m
2026-07-12 CCA1561 - Jul 12, 06:40 UTCJul 12, 06:55 UTC15m
2026-07-11 CCA110 - Jul 11, 10:00 UTCJul 11, 10:15 UTC15m
2026-07-11 CCA109 - Jul 11, 05:10 UTCJul 11, 08:15 UTC3h 5m
2026-07-10 CCA1931 - Jul 10, 13:00 UTCJul 10, 13:20 UTC20m
2026-07-10 CCA742 - Jul 10, 07:05 UTCJul 10, 07:15 UTC10m
2026-07-10 CCA741 - Jul 10, 01:45 UTCJul 10, 02:05 UTC20m
2026-07-09 CCA110 - Jul 9, 10:00 UTCJul 9, 10:20 UTC20m
2026-07-09 CCA109 - Jul 9, 05:05 UTCJul 9, 07:55 UTC2h 50m
2026-07-09 CCA1932 - Jul 9, 03:00 UTCJul 9, 03:10 UTC10m
2026-07-08 CCA1931 - Jul 8, 12:20 UTCJul 8, 12:35 UTC15m
2026-07-08 CCA742 - Jul 8, 07:15 UTCJul 8, 07:40 UTC25m
2026-07-08 CCA741 - Jul 8, 04:35 UTCJul 8, 05:40 UTC1h 5m
2026-07-08 CCA741 - Jul 8, 01:45 UTCJul 8, 02:05 UTC20m
2026-07-07 CCA1607 - Jul 7, 11:40 UTCJul 7, 11:50 UTC10m
2026-07-06 CCA1734 - Jul 6, 13:45 UTCJul 6, 13:55 UTC10m
2026-07-06 CCA1733 - Jul 6, 09:55 UTCJul 6, 11:00 UTC1h 5m
2026-07-06 CCA1738 - Jul 6, 03:30 UTCJul 6, 03:40 UTC10m
2026-07-06 CCA1737 - Jul 6, 00:45 UTCJul 6, 01:30 UTC45m

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-325M page for operator, model, and routing details .

Mode-S 781C3E frequently asked

What is Mode-S code 781C3E?
781C3E is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-325M.
Where is Mode-S 781C3E registered?
Mode-S code 781C3E is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781C3E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781C3E, octal 36016076, decimal 7,871,550.
What flights does 781C3E operate?
Mode-S 781C3E has broadcast 20 distinct callsigns, including CCA741, CCA1737, CCA742, CCA1738, CCA1931.