Apparatus

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sensors Mode-S transponder

780A3B

ICAO 24-bit transponder address · allocated to China

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

Hex
780A3B
Octal
36005073
Decimal
7,866,939
Country
CN
Tail
B-KQI
Type
B77W
No current signal · last broadcast 48m ago
Flights observed
200
Distinct callsigns
20
Country
CN
Last broadcast
48m ago

Last known position

Most recent position reported by Mode-S 780A3B.

Country allocation

The ICAO 24-bit address 780A3B 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
CPA253 - 29 2026-07-11
CPA254 - 27 2026-07-12
CPA251 Cathay Pacific 24 2026-07-01
CPA252 Cathay Pacific 16 2026-07-02
CPA881 - 14 2026-07-13
CPA880 - 13 2026-07-12
CPA831 - 10 2026-07-03
CPA830 - 10 2026-07-14
CPA234 Cathay Pacific 9 2026-05-22
CPA233 Cathay Pacific 9 2026-05-21
CPA391 - 8 2026-07-09
CPA390 - 7 2026-07-09
CPA882 Cathay Pacific 6 2026-05-29
CPA883 Cathay Pacific 4 2026-05-30
CPA774 Cathay Pacific 2 2026-04-29
CPA743 - 2 2026-06-13
CPA431 - 2 2026-06-13
CPA104 - 2 2026-06-30
CPA742 Cathay Pacific 1 2026-06-13
CPA717 Cathay Pacific 1 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CPA830 - Jul 14, 01:40 UTCJul 14, 04:45 UTC3h 5m
2026-07-13 CPA881 - Jul 13, 08:35 UTCJul 13, 22:10 UTC13h 35m
2026-07-12 CPA880 - Jul 12, 16:30 UTCJul 13, 05:31 UTC13h 0m
2026-07-12 CPA254 ZGN → HKG Jul 12, 08:25 UTCJul 12, 09:00 UTC35m
2026-07-11 CPA254 - Jul 11, 21:25 UTCJul 12, 00:20 UTC2h 55m
2026-07-11 CPA253 - Jul 11, 13:55 UTCJul 11, 19:15 UTC5h 20m
2026-07-11 CPA253 - Jul 11, 05:55 UTCJul 11, 06:10 UTC15m
2026-07-10 CPA881 - Jul 10, 08:45 UTCJul 10, 22:35 UTC13h 50m
2026-07-09 CPA880 - Jul 9, 16:35 UTCJul 10, 05:20 UTC12h 45m
2026-07-09 CPA391 - Jul 9, 06:05 UTCJul 9, 08:40 UTC2h 35m
2026-07-09 CPA390 - Jul 9, 01:15 UTCJul 9, 01:30 UTC15m
2026-07-08 CPA881 LAX → HKG Jul 8, 09:25 UTCJul 8, 23:15 UTC13h 50m
2026-07-07 CPA880 HKG → LAX Jul 7, 18:45 UTCJul 8, 07:05 UTC12h 20m
2026-07-07 CPA254 ZGN → HKG Jul 7, 09:10 UTCJul 7, 10:30 UTC1h 20m
2026-07-06 CPA254 - Jul 6, 22:00 UTCJul 7, 02:15 UTC4h 15m
2026-07-06 CPA253 HKG → LHR Jul 6, 13:55 UTCJul 6, 19:10 UTC5h 15m
2026-07-06 CPA253 HKG → LHR Jul 6, 05:35 UTCJul 6, 05:50 UTC15m
2026-07-05 CPA881 LAX → HKG Jul 5, 08:40 UTCJul 5, 22:20 UTC13h 40m
2026-07-04 CPA880 HKG → LAX Jul 4, 16:30 UTCJul 5, 05:10 UTC12h 40m
2026-07-03 CPA831 JFK → HKG Jul 3, 20:25 UTCJul 4, 11:45 UTC15h 20m
2026-07-03 CPA830 HKG → JFK Jul 3, 02:40 UTCJul 3, 18:05 UTC15h 25m
2026-07-02 CPA252 LHR → HKG Jul 2, 11:40 UTCJul 2, 23:20 UTC11h 40m
2026-07-01 CPA251 HKG → LHR Jul 1, 23:30 UTCJul 2, 04:30 UTC5h 0m
2026-07-01 CPA251 HKG → LHR Jul 1, 15:30 UTCJul 1, 15:45 UTC15m
2026-07-01 CPA391 - Jul 1, 06:05 UTCJul 1, 08:50 UTC2h 45m
2026-07-01 CPA390 - Jul 1, 01:20 UTCJul 1, 01:35 UTC15m
2026-06-30 CPA104 - Jun 30, 13:15 UTCJun 30, 13:35 UTC20m
2026-06-30 CPA104 - Jun 30, 04:45 UTCJun 30, 12:25 UTC7h 40m
2026-06-29 CPA105 HKG → MEL Jun 29, 16:35 UTCJun 30, 01:04 UTC8h 30m
2026-06-28 CPA831 JFK → HKG Jun 28, 21:24 UTCJun 29, 13:00 UTC15h 35m
2026-06-28 CPA830 HKG → JFK Jun 28, 03:59 UTCJun 28, 18:59 UTC15h 0m
2026-06-27 CPA252 LHR → HKG Jun 27, 12:39 UTCJun 28, 00:04 UTC11h 25m
2026-06-27 CPA251 HKG → LHR Jun 27, 00:05 UTCJun 27, 04:54 UTC4h 50m
2026-06-26 CPA251 HKG → LHR Jun 26, 15:29 UTCJun 26, 15:45 UTC15m
2026-06-26 CPA254 - Jun 26, 08:34 UTCJun 26, 09:14 UTC40m
2026-06-25 CPA254 - Jun 25, 21:25 UTCJun 26, 00:30 UTC3h 5m
2026-06-25 CPA253 HKG → LHR Jun 25, 13:59 UTCJun 25, 15:20 UTC1h 20m
2026-06-25 CPA253 HKG → LHR Jun 25, 05:44 UTCJun 25, 05:55 UTC10m
2026-06-24 CPA252 LHR → HKG Jun 24, 11:54 UTCJun 24, 23:40 UTC11h 45m
2026-06-23 CPA251 HKG → LHR Jun 23, 23:24 UTCJun 24, 04:15 UTC4h 50m
2026-06-23 CPA251 HKG → LHR Jun 23, 15:04 UTCJun 23, 15:19 UTC15m
2026-06-22 CPA831 JFK → HKG Jun 22, 19:34 UTCJun 23, 11:14 UTC15h 40m
2026-06-22 CPA830 HKG → JFK Jun 22, 01:29 UTCJun 22, 16:50 UTC15h 20m
2026-06-21 CPA391 - Jun 21, 06:24 UTCJun 21, 09:20 UTC2h 55m
2026-06-21 CPA390 - Jun 21, 01:25 UTCJun 21, 01:39 UTC15m
2026-06-20 CPA881 LAX → HKG Jun 20, 08:49 UTCJun 20, 19:55 UTC11h 5m
2026-06-19 CPA880 HKG → LAX Jun 19, 16:25 UTCJun 20, 04:44 UTC12h 20m
2026-06-19 CPA254 - Jun 19, 09:40 UTCJun 19, 10:14 UTC35m
2026-06-18 CPA254 - Jun 18, 22:20 UTCJun 19, 02:39 UTC4h 19m
2026-06-18 CPA253 HKG → LHR Jun 18, 15:00 UTCJun 18, 20:05 UTC5h 5m

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

Mode-S 780A3B frequently asked

What is Mode-S code 780A3B?
780A3B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-KQI.
Where is Mode-S 780A3B registered?
Mode-S code 780A3B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780A3B broadcasting right now?
No active broadcast right now. Last signal was 48m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780A3B, octal 36005073, decimal 7,866,939.
What flights does 780A3B operate?
Mode-S 780A3B has broadcast 20 distinct callsigns, including CPA253, CPA254, CPA251, CPA252, CPA881.