Apparatus

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sensors Mode-S transponder

780A2A

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-KPY · BOEING 777-300ER

Hex
780A2A
Octal
36005052
Decimal
7,866,922
Country
CN
Tail
B-KPY
Type
B77W
No current signal · last broadcast 2h ago
Flights observed
285
Distinct callsigns
20
Country
CN
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 780A2A.

Country allocation

The ICAO 24-bit address 780A2A 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
CPA663 - 30 2026-07-11
CPA660 - 23 2026-07-12
CPA870 - 18 2026-07-12
CPA665 Cathay Pacific 18 2026-06-29
CPA698 - 17 2026-06-29
CPA879 - 16 2026-07-12
CPA882 Cathay Pacific 10 2026-07-01
CPA679 - 10 2026-07-13
CPA319 - 10 2026-07-09
CPA883 Cathay Pacific 8 2026-07-02
CPA815 - 8 2026-07-06
CPA694 - 8 2026-07-13
CPA139 - 7 2026-06-30
CPA885 Cathay Pacific 6 2026-04-26
CPA740 - 6 2026-06-20
CPA683 Cathay Pacific 6 2026-05-16
CPA259 Cathay Pacific 6 2026-05-20
CPA138 Cathay Pacific 6 2026-06-30
CPA814 - 5 2026-07-06
CPA742 Cathay Pacific 5 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 CPA694 DEL → HKG Jul 13, 20:15 UTCJul 14, 01:10 UTC4h 55m
2026-07-13 CPA679 - Jul 13, 14:25 UTCJul 13, 18:10 UTC3h 45m
2026-07-13 CPA679 - Jul 13, 13:25 UTCJul 13, 13:40 UTC15m
2026-07-12 CPA879 - Jul 12, 21:25 UTCJul 13, 10:35 UTC13h 10m
2026-07-12 CPA870 - Jul 12, 06:05 UTCJul 12, 18:20 UTC12h 15m
2026-07-12 CPA660 - Jul 12, 01:40 UTCJul 12, 02:15 UTC35m
2026-07-11 CPA660 - Jul 11, 20:40 UTCJul 12, 00:01 UTC3h 20m
2026-07-11 CPA663 - Jul 11, 18:00 UTCJul 11, 18:10 UTC10m
2026-07-11 CPA663 - Jul 11, 15:05 UTCJul 11, 16:45 UTC1h 40m
2026-07-11 CPA663 - Jul 11, 13:00 UTCJul 11, 13:10 UTC10m
2026-07-11 CPA879 - Jul 11, 10:25 UTCJul 11, 10:40 UTC15m
2026-07-10 CPA879 - Jul 10, 21:35 UTCJul 11, 09:55 UTC12h 20m
2026-07-10 CPA870 - Jul 10, 05:45 UTCJul 10, 18:05 UTC12h 20m
2026-07-10 CPA660 - Jul 10, 01:45 UTCJul 10, 02:10 UTC25m
2026-07-09 CPA660 - Jul 9, 22:05 UTCJul 9, 23:55 UTC1h 50m
2026-07-09 CPA660 - Jul 9, 20:35 UTCJul 9, 20:45 UTC10m
2026-07-09 CPA663 - Jul 9, 18:00 UTCJul 9, 18:15 UTC15m
2026-07-09 CPA663 - Jul 9, 15:10 UTCJul 9, 16:45 UTC1h 35m
2026-07-09 CPA663 - Jul 9, 13:05 UTCJul 9, 13:20 UTC15m
2026-07-09 CPA319 HKG → HKG Jul 9, 00:50 UTCJul 9, 07:05 UTC6h 15m
2026-07-08 CPA104 - Jul 8, 13:30 UTCJul 8, 14:00 UTC30m
2026-07-08 CPA104 - Jul 8, 04:40 UTCJul 8, 12:40 UTC8h 0m
2026-07-07 CPA105 HKG → MEL Jul 7, 17:10 UTCJul 8, 01:00 UTC7h 50m
2026-07-06 CPA815 - Jul 6, 17:45 UTCJul 7, 05:55 UTC12h 10m
2026-07-06 CPA814 HKG → YVR Jul 6, 03:30 UTCJul 6, 14:50 UTC11h 20m
2026-07-06 CPA694 - Jul 6, 00:35 UTCJul 6, 01:05 UTC30m
2026-07-05 CPA694 - Jul 5, 20:05 UTCJul 5, 22:50 UTC2h 45m
2026-07-05 CPA679 HKG → DEL Jul 5, 14:00 UTCJul 5, 18:20 UTC4h 20m
2026-07-05 CPA679 HKG → DEL Jul 5, 13:10 UTCJul 5, 13:20 UTC10m
2026-07-04 CPA879 - Jul 4, 21:45 UTCJul 5, 11:05 UTC13h 20m
2026-07-04 CPA870 HKG → SFO Jul 4, 06:15 UTCJul 4, 18:25 UTC12h 10m
2026-07-03 CPA459 KHH → HKG Jul 3, 12:05 UTCJul 3, 13:15 UTC1h 10m
2026-07-03 CPA458 - Jul 3, 09:50 UTCJul 3, 10:50 UTC1h 0m
2026-07-03 CPA319 - Jul 3, 06:40 UTCJul 3, 07:25 UTC45m
2026-07-03 CPA316 - Jul 3, 01:00 UTCJul 3, 06:05 UTC5h 5m
2026-07-02 CPA883 LAX → HKG Jul 2, 07:50 UTCJul 2, 21:35 UTC13h 45m
2026-07-01 CPA882 HKG → LAX Jul 1, 11:00 UTCJul 1, 23:30 UTC12h 30m
2026-07-01 CPA335 - Jul 1, 04:20 UTCJul 1, 07:15 UTC2h 55m
2026-06-30 CPA334 HKG → PEK Jun 30, 23:35 UTCJun 30, 23:50 UTC15m
2026-06-30 CPA138 SYD → HKG Jun 30, 12:15 UTCJun 30, 21:00 UTC8h 45m
2026-06-30 CPA139 - Jun 30, 02:45 UTCJun 30, 10:00 UTC7h 15m
2026-06-30 CPA139 - Jun 30, 01:40 UTCJun 30, 01:55 UTC15m
2026-06-29 CPA698 DEL → HKG Jun 29, 17:40 UTCJun 29, 22:24 UTC4h 45m
2026-06-29 CPA665 HKG → DEL Jun 29, 11:04 UTCJun 29, 15:04 UTC4h 0m
2026-06-29 CPA665 HKG → DEL Jun 29, 10:15 UTCJun 29, 10:29 UTC15m
2026-06-29 CPA319 - Jun 29, 01:29 UTCJun 29, 06:50 UTC5h 20m
2026-06-29 CPA316 - Jun 29, 00:34 UTCJun 29, 00:49 UTC15m
2026-06-28 CPA138 SYD → HKG Jun 28, 12:25 UTCJun 28, 21:10 UTC8h 45m
2026-06-28 CPA139 HKG → SYD Jun 28, 01:55 UTCJun 28, 10:15 UTC8h 20m
2026-06-27 CPA698 - Jun 27, 21:50 UTCJun 27, 22:25 UTC35m

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

Mode-S 780A2A frequently asked

What is Mode-S code 780A2A?
780A2A is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-KPY.
Where is Mode-S 780A2A registered?
Mode-S code 780A2A is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780A2A broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780A2A, octal 36005052, decimal 7,866,922.
What flights does 780A2A operate?
Mode-S 780A2A has broadcast 20 distinct callsigns, including CPA663, CPA660, CPA870, CPA665, CPA698.