Apparatus

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sensors Mode-S transponder

781CE4

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-327T · AIRBUS A-321neo

Hex
781CE4
Octal
36016344
Decimal
7,871,716
Country
CN
Tail
B-327T
Type
A21N
No current signal · last broadcast Jul 26, 03:05 UTC
Flights observed
95
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 03:05 UTC

Last known position

Most recent position reported by Mode-S 781CE4.

Country allocation

The ICAO 24-bit address 781CE4 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
CCA742 Air China 7 2026-07-20
CCA741 Air China 5 2026-07-22
CCA413 Air China 5 2026-05-05
CCA414 Air China 4 2026-05-06
CCA745 - 3 2026-07-16
CCA4182 Air China 3 2026-06-09
CCA4116 Air China 3 2026-06-10
CCA1801 - 3 2026-07-10
CCA809 - 2 2026-07-10
CCA4324 Air China 2 2026-06-04
CCA4314 Air China 2 2026-06-08
CCA4102 Air China 2 2026-06-05
CCA1433 - 2 2026-07-06
CCA1238 - 2 2026-07-09
CCA1237 - 2 2026-07-08
CCA1212 - 2 2026-06-30
CCA1211 - 2 2026-06-30
CCA110 Air China 2 2026-07-23
CCA109 Air China 2 2026-07-23
CCA8207 - 1 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA1705 HGH → PEK Jul 26, 02:50 UTCJul 26, 03:05 UTC15m
2026-07-24 CCA1726 CAN → HGH Jul 24, 12:45 UTCJul 24, 12:55 UTC10m
2026-07-24 CCA1576 TAO → PEK Jul 24, 10:50 UTCJul 24, 11:10 UTC20m
2026-07-24 CCA1575 PEK → TAO Jul 24, 07:20 UTCJul 24, 07:30 UTC10m
2026-07-23 CCA110 HKG → PEK Jul 23, 12:30 UTCJul 23, 12:50 UTC20m
2026-07-23 CCA110 HKG → PEK Jul 23, 10:00 UTCJul 23, 10:15 UTC15m
2026-07-23 CCA109 PEK → HKG Jul 23, 07:35 UTCJul 23, 08:10 UTC35m
2026-07-23 CCA109 PEK → HKG Jul 23, 04:55 UTCJul 23, 05:20 UTC25m
2026-07-22 CCA1931 PEK → NNG Jul 22, 12:45 UTCJul 22, 13:05 UTC20m
2026-07-22 CCA741 PEK → HAN Jul 22, 01:30 UTCJul 22, 01:50 UTC20m
2026-07-21 CCA1523 - Jul 21, 04:00 UTCJul 21, 04:15 UTC15m
2026-07-20 CCA164S - Jul 20, 22:25 UTCJul 20, 22:35 UTC10m
2026-07-20 CCA742 HAN → PEK Jul 20, 09:55 UTCJul 20, 10:05 UTC10m
2026-07-20 CCA742 HAN → PEK Jul 20, 06:55 UTCJul 20, 07:10 UTC15m
2026-07-20 CCA741 PEK → HAN Jul 20, 01:15 UTCJul 20, 01:35 UTC20m
2026-07-19 CCA1287 PEK → URC Jul 19, 10:50 UTCJul 19, 11:05 UTC15m
2026-07-19 CCA1352 - Jul 19, 08:35 UTCJul 19, 08:45 UTC10m
2026-07-19 CCA1351 - Jul 19, 00:25 UTCJul 19, 00:45 UTC20m
2026-07-18 CCA8207 - Jul 18, 07:20 UTCJul 18, 07:35 UTC15m
2026-07-18 CCA8204 - Jul 18, 02:50 UTCJul 18, 03:05 UTC15m
2026-07-17 CCA742 - Jul 17, 09:45 UTCJul 17, 10:00 UTC15m
2026-07-17 CCA742 - Jul 17, 06:45 UTCJul 17, 07:05 UTC20m
2026-07-17 CCA741 - Jul 17, 01:15 UTCJul 17, 01:35 UTC20m
2026-07-16 CCA745 - Jul 16, 11:45 UTCJul 16, 19:05 UTC7h 20m
2026-07-16 CCA1554 - Jul 16, 04:10 UTCJul 16, 04:20 UTC10m
2026-07-15 CCA742 - Jul 15, 10:00 UTCJul 15, 10:10 UTC10m
2026-07-15 CCA742 - Jul 15, 07:00 UTCJul 15, 07:10 UTC10m
2026-07-15 CCA741 - Jul 15, 01:50 UTCJul 15, 02:10 UTC20m
2026-07-14 CCA1871 - Jul 14, 07:30 UTCJul 14, 07:40 UTC10m
2026-07-13 CCA1919 - Jul 13, 09:45 UTCJul 13, 10:05 UTC20m
2026-07-12 CCA1461 - Jul 12, 23:15 UTCJul 12, 23:35 UTC20m
2026-07-11 CCA745 - Jul 11, 12:55 UTCJul 11, 20:30 UTC7h 35m
2026-07-11 CCA1710 - Jul 11, 03:40 UTCJul 11, 03:55 UTC15m
2026-07-10 CCA1801 - Jul 10, 13:45 UTCJul 10, 14:00 UTC15m
2026-07-10 CCA809 - Jul 10, 04:45 UTCJul 10, 04:55 UTC10m
2026-07-09 CCA1821 - Jul 9, 13:35 UTCJul 9, 13:50 UTC15m
2026-07-09 CCA1238 - Jul 9, 05:10 UTCJul 9, 05:30 UTC20m
2026-07-08 CCA1237 - Jul 8, 22:30 UTCJul 8, 22:55 UTC25m
2026-07-08 CCA1925 - Jul 8, 06:55 UTCJul 8, 07:20 UTC25m
2026-07-07 CCA1343 - Jul 7, 23:10 UTCJul 7, 23:30 UTC20m
2026-07-07 CCA1725 - Jul 7, 20:05 UTCJul 7, 20:15 UTC10m
2026-07-07 CCA1720 - Jul 7, 14:40 UTCJul 7, 15:00 UTC20m
2026-07-07 CCA1238 - Jul 7, 05:15 UTCJul 7, 05:35 UTC20m
2026-07-06 CCA1237 PEK → HMI Jul 6, 22:35 UTCJul 6, 22:50 UTC15m
2026-07-06 CCA1433 - Jul 6, 02:00 UTCJul 6, 02:20 UTC20m
2026-07-01 CCA1801 - Jul 1, 12:35 UTCJul 1, 12:50 UTC15m
2026-07-01 CCA742 - Jul 1, 06:55 UTCJul 1, 07:15 UTC20m
2026-07-01 CCA741 - Jul 1, 01:25 UTCJul 1, 04:35 UTC3h 10m
2026-06-30 CCA1212 - Jun 30, 13:50 UTCJun 30, 14:10 UTC20m
2026-06-30 CCA1211 - Jun 30, 04:50 UTCJun 30, 05:05 UTC15m

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-327T page for operator, model, and routing details .

Mode-S 781CE4 frequently asked

What is Mode-S code 781CE4?
781CE4 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-327T.
Where is Mode-S 781CE4 registered?
Mode-S code 781CE4 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781CE4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 03:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781CE4, octal 36016344, decimal 7,871,716.
What flights does 781CE4 operate?
Mode-S 781CE4 has broadcast 20 distinct callsigns, including CCA742, CCA741, CCA413, CCA414, CCA745.