Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

781E4C

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-33CD · AIRBUS A-321neo

Hex
781E4C
Octal
36017114
Decimal
7,872,076
Country
CN
Tail
B-33CD
Type
A21N
No current signal · last broadcast 15h ago
Flights observed
46
Distinct callsigns
20
Country
CN
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 781E4C.

Country allocation

The ICAO 24-bit address 781E4C 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
CCA745 Air China 4 2026-05-05
CCA811 Air China 2 2026-04-28
CCA1959 Air China 2 2026-04-30
CCA1931 Air China 2 2026-05-17
CCA1906 Air China 2 2026-05-02
CCA1905 Air China 2 2026-05-02
CCA1738 Air China 2 2026-06-03
CCA1311 Air China 2 2026-05-03
CCA809 Air China 1 2026-05-05
CCA741 Air China 1 2026-05-19
CCA4184 Air China 1 2026-05-29
CCA4106 Air China 1 2026-05-29
CCA1960 Air China 1 2026-04-30
CCA1849 Air China 1 2026-05-28
CCA1845 Air China 1 2026-05-26
CCA1737 Air China 1 2026-06-03
CCA1733 Air China 1 2026-05-20
CCA1728 Air China 1 2026-05-19
CCA1716 Air China 1 2026-05-18
CCA1712 Air China 1 2026-05-01

Recent flights last 46

DateFlightRouteTakeoffLandingDuration
2026-06-03 CCA1738 SZX → HGH Jun 3, 03:10 UTCJun 3, 03:20 UTC10m
2026-06-03 CCA1737 HGH → SZX Jun 3, 01:15 UTCJun 3, 01:35 UTC20m
2026-05-30 CCA1294 URC → PEK May 30, 15:15 UTCMay 30, 15:35 UTC20m
2026-05-30 CCA1293 PEK → URC May 30, 07:10 UTCMay 30, 07:30 UTC20m
2026-05-29 CCA4106 PEK → CTU May 29, 13:10 UTCMay 29, 13:25 UTC15m
2026-05-29 CCA4184 PEK → CTU May 29, 01:15 UTCMay 29, 01:35 UTC20m
2026-05-28 CCA1849 PEK → NGB May 28, 12:15 UTCMay 28, 12:25 UTC10m
2026-05-28 CCA1511 PEK → KHN May 28, 04:35 UTCMay 28, 04:50 UTC15m
2026-05-27 CCA1539 - May 27, 12:10 UTCMay 27, 12:20 UTC10m
2026-05-27 CCA1623 PEK → HRB May 27, 04:24 UTCMay 27, 04:34 UTC10m
2026-05-26 CCA1845 PEK → HFE May 26, 12:45 UTCMay 26, 12:54 UTC10m
2026-05-26 CCA1286 - May 26, 10:20 UTCMay 26, 10:34 UTC15m
2026-05-26 CCA1285 - May 26, 04:04 UTCMay 26, 04:20 UTC15m
2026-05-25 CCA1230 XIY → PEK May 25, 12:45 UTCMay 25, 13:10 UTC25m
2026-05-20 CCA1733 HGH → SZX May 20, 09:00 UTCMay 20, 09:25 UTC25m
2026-05-20 CCA1738 SZX → HGH May 20, 03:15 UTCMay 20, 03:25 UTC10m
2026-05-19 CCA1728 CAN → HGH May 19, 11:55 UTCMay 19, 12:05 UTC10m
2026-05-19 CCA741 PEK → HAN May 19, 01:15 UTCMay 19, 01:40 UTC25m
2026-05-18 CCA1716 PEK → HGH May 18, 06:01 UTCMay 18, 06:10 UTC10m
2026-05-17 CCA1931 PEK → NNG May 17, 11:55 UTCMay 17, 12:15 UTC20m
2026-05-06 CCA1433 PEK → KWE May 6, 01:55 UTCMay 6, 02:30 UTC35m
2026-05-05 CCA745 PEK → PNH May 5, 11:35 UTCMay 5, 11:50 UTC15m
2026-05-05 CCA809 PEK → VVO May 5, 03:25 UTCMay 5, 03:35 UTC10m
2026-05-04 CCA134 HND → PEK May 4, 07:20 UTCMay 4, 09:35 UTC2h 15m
2026-05-04 CCA133 PEK → HND May 4, 02:10 UTCMay 4, 05:00 UTC2h 50m
2026-05-03 CCA745 PEK → PNH May 3, 11:20 UTCMay 3, 11:40 UTC20m
2026-05-03 CCA1311 PEK → NNG May 3, 01:30 UTCMay 3, 01:50 UTC20m
2026-05-02 CCA1635 PEK → SHE May 2, 10:55 UTCMay 2, 11:05 UTC10m
2026-05-02 CCA1906 ZUH → PEK May 2, 05:25 UTCMay 2, 05:40 UTC15m
2026-05-02 CCA1905 PEK → ZUH May 2, 01:05 UTCMay 2, 01:20 UTC15m
2026-05-01 CCA1712 PEK → HGH May 1, 04:05 UTCMay 1, 04:15 UTC10m
2026-04-30 CCA1960 HAK → PEK Apr 30, 10:35 UTCApr 30, 10:45 UTC10m
2026-04-30 CCA1959 PEK → HAK Apr 30, 02:40 UTCApr 30, 03:00 UTC20m
2026-04-29 CCA745 PEK → PNH Apr 29, 11:20 UTCApr 29, 11:40 UTC20m
2026-04-28 CCA811 PEK → VVO Apr 28, 05:05 UTCApr 28, 05:15 UTC10m
2026-04-27 CCA1931 PEK → NNG Apr 27, 11:50 UTCApr 27, 12:10 UTC20m
2026-04-24 CCA1369 PEK → SYX Apr 24, 23:45 UTCApr 25, 00:05 UTC20m
2026-04-24 CCA1647 PEK → CGQ Apr 24, 11:40 UTCApr 24, 11:50 UTC10m
2026-04-24 CCA1906 ZUH → PEK Apr 24, 05:30 UTCApr 24, 05:45 UTC15m
2026-04-24 CCA1905 PEK → ZUH Apr 24, 00:55 UTCApr 24, 01:10 UTC15m
2026-04-23 CCA1253 PEK → URC Apr 23, 03:45 UTCApr 23, 04:00 UTC15m
2026-04-22 CCA811 PEK → VVO Apr 22, 05:01 UTCApr 22, 05:10 UTC10m
2026-04-21 CCA1311 PEK → NNG Apr 21, 01:45 UTCApr 21, 02:10 UTC25m
2026-04-20 CCA1959 PEK → HAK Apr 20, 02:40 UTCApr 20, 03:00 UTC20m
2026-04-19 CCA745 PEK → PNH Apr 19, 12:10 UTCApr 19, 12:40 UTC30m
2026-04-19 CCA1554 - Apr 19, 04:25 UTCApr 19, 04:35 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-33CD page for operator, model, and routing details .

Mode-S 781E4C frequently asked

What is Mode-S code 781E4C?
781E4C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-33CD.
Where is Mode-S 781E4C registered?
Mode-S code 781E4C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 781E4C broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 781E4C, octal 36017114, decimal 7,872,076.
What flights does 781E4C operate?
Mode-S 781E4C has broadcast 20 distinct callsigns, including CCA745, CCA811, CCA1959, CCA1931, CCA1906.