Apparatus

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sensors Mode-S transponder

781CE5

ICAO 24-bit transponder address · allocated to China

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

Hex
781CE5
Octal
36016345
Decimal
7,871,717
Country
CN
Tail
B-327U
Type
A21N
No current signal · last broadcast Jul 26, 12:30 UTC
Flights observed
120
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 12:30 UTC

Last known position

Most recent position reported by Mode-S 781CE5.

Country allocation

The ICAO 24-bit address 781CE5 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 Air China 10 2026-07-26
CCA809 - 7 2026-06-24
CCA742 Air China 7 2026-07-26
CCA1931 Air China 7 2026-07-26
CCA1286 - 5 2026-07-25
CCA1285 - 4 2026-07-25
CCA1461 - 3 2026-07-01
CCA1373 - 3 2026-06-22
CCA1371 Air China 3 2026-06-12
CCA133 Air China 3 2026-07-22
CCA1254 Air China 3 2026-05-28
CCA811 - 2 2026-07-07
CCA745 Air China 2 2026-07-21
CCA1925 - 2 2026-06-27
CCA1845 Air China 2 2026-07-22
CCA1801 Air China 2 2026-07-24
CCA1732 Air China 2 2026-05-01
CCA1539 - 2 2026-06-08
CCA1525 - 2 2026-07-04
CCA1367 Air China 2 2026-05-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CCA1931 PEK → NNG Jul 26, 12:15 UTCJul 26, 12:30 UTC15m
2026-07-26 CCA742 HAN → PEK Jul 26, 10:05 UTCJul 26, 10:15 UTC10m
2026-07-26 CCA742 HAN → PEK Jul 26, 07:05 UTCJul 26, 07:25 UTC20m
2026-07-26 CCA741 PEK → HAN Jul 26, 04:00 UTCJul 26, 04:10 UTC10m
2026-07-26 CCA741 PEK → HAN Jul 26, 01:10 UTCJul 26, 01:30 UTC20m
2026-07-25 CCA1286 - Jul 25, 10:20 UTCJul 25, 10:40 UTC20m
2026-07-25 CCA1285 - Jul 25, 04:20 UTCJul 25, 04:30 UTC10m
2026-07-25 CCA1802 XMN → PEK Jul 25, 02:20 UTCJul 25, 02:40 UTC20m
2026-07-24 CCA1801 PEK → XMN Jul 24, 12:40 UTCJul 24, 13:00 UTC20m
2026-07-24 CCA1286 - Jul 24, 10:20 UTCJul 24, 10:40 UTC20m
2026-07-24 CCA1285 - Jul 24, 03:50 UTCJul 24, 04:05 UTC15m
2026-07-23 CCA1286 - Jul 23, 10:20 UTCJul 23, 10:35 UTC15m
2026-07-23 CCA1285 - Jul 23, 04:00 UTCJul 23, 04:15 UTC15m
2026-07-22 CCA1845 PEK → HFE Jul 22, 15:25 UTCJul 22, 15:40 UTC15m
2026-07-22 CCA133 PEK → HND Jul 22, 03:35 UTCJul 22, 05:25 UTC1h 50m
2026-07-22 CCA133 PEK → HND Jul 22, 02:25 UTCJul 22, 02:40 UTC15m
2026-07-21 CCA746 PNH → PEK Jul 21, 21:40 UTCJul 21, 21:55 UTC15m
2026-07-21 CCA745 PEK → PNH Jul 21, 12:05 UTCJul 21, 19:20 UTC7h 15m
2026-07-21 CCA1433 PEK → KWE Jul 21, 01:45 UTCJul 21, 02:05 UTC20m
2026-07-20 CCA4103 - Jul 20, 08:30 UTCJul 20, 09:05 UTC35m
2026-07-18 CCA4314 - Jul 18, 09:50 UTCJul 18, 10:10 UTC20m
2026-07-18 CCA4313 - Jul 18, 07:50 UTCJul 18, 08:00 UTC10m
2026-07-14 CCA4068 - Jul 14, 12:50 UTCJul 14, 13:00 UTC10m
2026-07-13 CCA4324 - Jul 13, 12:40 UTCJul 13, 12:50 UTC10m
2026-07-09 CCA4102 - Jul 9, 05:45 UTCJul 9, 06:00 UTC15m
2026-07-08 CCA1712 - Jul 8, 04:10 UTCJul 8, 04:20 UTC10m
2026-07-07 CCA1801 - Jul 7, 14:40 UTCJul 7, 14:55 UTC15m
2026-07-07 CCA811 - Jul 7, 05:30 UTCJul 7, 05:50 UTC20m
2026-07-06 CCA1691 PEK → JMU Jul 6, 22:30 UTCJul 6, 22:40 UTC10m
2026-07-06 CCA1443 - Jul 6, 11:35 UTCJul 6, 12:00 UTC25m
2026-07-06 CCA1415 - Jul 6, 01:40 UTCJul 6, 02:00 UTC20m
2026-07-05 CCA1859 - Jul 5, 11:35 UTCJul 5, 11:45 UTC10m
2026-07-04 CCA1525 - Jul 4, 12:45 UTCJul 4, 12:55 UTC10m
2026-07-04 CCA811 - Jul 4, 05:25 UTCJul 4, 05:35 UTC10m
2026-07-02 CCA1343 - Jul 2, 23:20 UTCJul 2, 23:45 UTC25m
2026-07-01 CCA1461 - Jul 1, 23:15 UTCJul 1, 23:40 UTC25m
2026-06-29 CCA1401 - Jun 29, 08:14 UTCJun 29, 08:39 UTC25m
2026-06-28 CCA1461 - Jun 28, 23:04 UTCJun 28, 23:25 UTC20m
2026-06-28 CCA1926 ZHA → PEK Jun 28, 06:59 UTCJun 28, 07:09 UTC10m
2026-06-27 CCA1925 - Jun 27, 23:29 UTCJun 27, 23:50 UTC20m
2026-06-27 CCA1643 - Jun 27, 00:34 UTCJun 27, 00:44 UTC10m
2026-06-26 CCA1925 - Jun 26, 06:45 UTCJun 26, 07:05 UTC20m
2026-06-25 CCA4110 - Jun 25, 12:10 UTCJun 25, 12:30 UTC20m
2026-06-25 CCA742 - Jun 25, 06:50 UTCJun 25, 07:19 UTC30m
2026-06-25 CCA741 - Jun 25, 01:09 UTCJun 25, 04:20 UTC3h 10m
2026-06-24 CCA809 - Jun 24, 03:24 UTCJun 24, 03:35 UTC10m
2026-06-23 CCA745 - Jun 23, 11:35 UTCJun 23, 19:19 UTC7h 45m
2026-06-23 CCA810 VVO → PEK Jun 23, 09:05 UTCJun 23, 09:29 UTC25m
2026-06-23 CCA809 - Jun 23, 03:20 UTCJun 23, 03:29 UTC10m
2026-06-22 CCA1821 - Jun 22, 15:24 UTCJun 22, 15:35 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-327U page for operator, model, and routing details .

Mode-S 781CE5 frequently asked

What is Mode-S code 781CE5?
781CE5 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-327U.
Where is Mode-S 781CE5 registered?
Mode-S code 781CE5 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781CE5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781CE5, octal 36016345, decimal 7,871,717.
What flights does 781CE5 operate?
Mode-S 781CE5 has broadcast 20 distinct callsigns, including CCA741, CCA809, CCA742, CCA1931, CCA1286.