Apparatus

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sensors Mode-S transponder

780D8B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-1639 · AIRBUS A-321

Hex
780D8B
Octal
36006613
Decimal
7,867,787
Country
CN
Tail
B-1639
Type
A321
No current signal · last broadcast 1d ago
Flights observed
59
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 780D8B.

Country allocation

The ICAO 24-bit address 780D8B 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
CCA740 - 4 2026-05-08
CCA739 - 4 2026-05-08
CCA125 Air China 4 2026-05-27
CCA126 Air China 3 2026-05-27
CCA728 Air China 2 2026-04-18
CCA727 Air China 2 2026-04-18
CCA726 Air China 2 2026-05-13
CCA725 Air China 2 2026-05-13
CCA182 Air China 2 2026-05-15
CCA181 Air China 2 2026-04-25
CCA1639 Air China 2 2026-05-27
CCA1286 - 2 2026-05-28
CCA1285 - 2 2026-05-28
CCA928 Air China 1 2026-05-17
CCA8352 Air China 1 2026-05-11
CCA422 Air China 1 2026-05-16
CCA421 Air China 1 2026-05-16
CCA1915 Air China 1 2026-05-26
CCA1843 Air China 1 2026-05-20
CCA184 Air China 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CCA1554 - May 29, 03:55 UTCMay 29, 04:05 UTC10m
2026-05-28 CCA1801 PEK → XMN May 28, 12:30 UTCMay 28, 12:45 UTC15m
2026-05-28 CCA1286 - May 28, 10:25 UTCMay 28, 10:40 UTC15m
2026-05-28 CCA1285 - May 28, 04:00 UTCMay 28, 04:15 UTC15m
2026-05-27 CCA1639 PEK → HRB May 27, 12:40 UTCMay 27, 12:50 UTC10m
2026-05-27 CCA126 ICN → PEK May 27, 08:55 UTCMay 27, 09:15 UTC20m
2026-05-27 CCA125 PEK → ICN May 27, 06:55 UTCMay 27, 07:20 UTC25m
2026-05-26 CCA1915 PEK → CGO May 26, 13:29 UTCMay 26, 13:50 UTC20m
2026-05-26 CCA126 ICN → PEK May 26, 09:09 UTCMay 26, 09:29 UTC20m
2026-05-26 CCA125 PEK → ICN May 26, 06:44 UTCMay 26, 07:15 UTC30m
2026-05-26 CCA125 PEK → ICN May 26, 05:45 UTCMay 26, 05:54 UTC10m
2026-05-22 CCA126 ICN → PEK May 22, 08:55 UTCMay 22, 09:20 UTC25m
2026-05-22 CCA125 PEK → ICN May 22, 07:00 UTCMay 22, 07:30 UTC30m
2026-05-21 CCA1286 - May 21, 10:25 UTCMay 21, 10:45 UTC20m
2026-05-21 CCA1285 - May 21, 04:05 UTCMay 21, 04:20 UTC15m
2026-05-20 CCA1639 PEK → HRB May 20, 12:45 UTCMay 20, 12:55 UTC10m
2026-05-20 CCA1843 PEK → HFE May 20, 05:25 UTCMay 20, 05:35 UTC10m
2026-05-19 CCA1601 PEK → SHE May 19, 13:05 UTCMay 19, 13:15 UTC10m
2026-05-19 CCA134 HND → PEK May 19, 07:20 UTCMay 19, 09:20 UTC2h 0m
2026-05-19 CCA133 PEK → HND May 19, 03:05 UTCMay 19, 05:15 UTC2h 10m
2026-05-18 CCA1483 - May 18, 04:51 UTCMay 18, 05:10 UTC20m
2026-05-17 CCA1807 PEK → FOC May 17, 10:45 UTCMay 17, 11:01 UTC15m
2026-05-17 CCA928 KIX → PEK May 17, 05:10 UTCMay 17, 06:35 UTC1h 25m
2026-05-16 CCA422 HND → PEK May 16, 12:31 UTCMay 17, 03:30 UTC15h 0m
2026-05-16 CCA421 PEK → HND May 16, 08:36 UTCMay 16, 10:50 UTC2h 15m
2026-05-15 CCA182 HND → PEK May 15, 05:20 UTCMay 15, 07:05 UTC1h 45m
2026-05-14 CCA168 HND → PEK May 14, 10:40 UTCMay 15, 03:45 UTC17h 5m
2026-05-14 CCA167 PEK → HND May 14, 06:10 UTCMay 14, 08:10 UTC2h 0m
2026-05-13 CCA726 KIX → HGH May 13, 03:50 UTCMay 13, 04:35 UTC45m
2026-05-13 CCA725 HGH → KIX May 13, 01:20 UTCMay 13, 02:10 UTC50m
2026-05-11 CCA146 NRT → HGH May 11, 12:55 UTCMay 11, 14:25 UTC1h 30m
2026-05-11 CCA145 HGH → NRT May 11, 10:05 UTCMay 11, 11:25 UTC1h 20m
2026-05-11 CCA8352 ZUH → HGH May 11, 05:25 UTCMay 11, 05:40 UTC15m
2026-05-08 CCA740 - May 8, 05:35 UTCMay 8, 06:14 UTC40m
2026-05-08 CCA739 - May 8, 02:59 UTCMay 8, 03:35 UTC35m
2026-05-06 CCA740 - May 6, 05:50 UTCMay 6, 06:20 UTC30m
2026-05-06 CCA739 - May 6, 03:20 UTCMay 6, 04:00 UTC40m
2026-05-04 CCA740 - May 4, 05:45 UTCMay 4, 06:35 UTC50m
2026-05-04 CCA739 - May 4, 03:00 UTCMay 4, 03:40 UTC40m
2026-05-01 CCA1573 - May 1, 13:35 UTCMay 1, 13:45 UTC10m
2026-05-01 CCA740 - May 1, 05:40 UTCMay 1, 06:20 UTC40m
2026-05-01 CCA739 - May 1, 03:05 UTCMay 1, 03:45 UTC40m
2026-04-25 CCA182 HND → PEK Apr 25, 05:10 UTCApr 25, 07:10 UTC2h 0m
2026-04-25 CCA181 PEK → HND Apr 25, 01:25 UTCApr 25, 03:10 UTC1h 45m
2026-04-25 CCA181 PEK → HND Apr 25, 00:20 UTCApr 25, 00:30 UTC10m
2026-04-24 CCA1511 PEK → KHN Apr 24, 04:55 UTCApr 24, 05:05 UTC10m
2026-04-23 CCA184 HND → PEK Apr 23, 23:35 UTCApr 24, 01:40 UTC2h 5m
2026-04-23 CCA183 PEK → HND Apr 23, 02:00 UTCApr 23, 12:45 UTC10h 45m
2026-04-22 CCA1374 CSX → PEK Apr 22, 10:35 UTCApr 22, 10:45 UTC10m
2026-04-22 CCA1373 PEK → CSX Apr 22, 05:15 UTCApr 22, 05:35 UTC20m

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-1639 page for operator, model, and routing details .

Mode-S 780D8B frequently asked

What is Mode-S code 780D8B?
780D8B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-1639.
Where is Mode-S 780D8B registered?
Mode-S code 780D8B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780D8B broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780D8B, octal 36006613, decimal 7,867,787.
What flights does 780D8B operate?
Mode-S 780D8B has broadcast 20 distinct callsigns, including CCA740, CCA739, CCA125, CCA126, CCA728.