sensors Mode-S transponder

780A61

ICAO 24-bit transponder address · allocated to China

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

Hex
780A61
Octal
36005141
Decimal
7,866,977
Country
CN
Tail
B-KQM
Type
B77W
No current signal · last broadcast 5h ago
Flights observed
96
Distinct callsigns
16
Country
CN
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 780A61.

Country allocation

The ICAO 24-bit address 780A61 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 16 distinct

Callsign Airline Flights Last seen
CPA251 Cathay Pacific 17 2026-05-23
CPA253 Cathay Pacific 16 2026-05-30
CPA254 Cathay Pacific 12 2026-05-22
CPA252 Cathay Pacific 10 2026-05-24
CPA830 Cathay Pacific 7 2026-05-27
CPA831 Cathay Pacific 6 2026-05-27
CPA391 Cathay Pacific 5 2026-05-14
CPA881 Cathay Pacific 4 2026-05-29
CPA233 Cathay Pacific 4 2026-05-14
CPA880 Cathay Pacific 3 2026-05-28
CPA234 Cathay Pacific 3 2026-05-15
CPA883 Cathay Pacific 2 2026-05-26
CPA882 Cathay Pacific 2 2026-05-25
CPA139 Cathay Pacific 2 2026-04-29
CPA138 Cathay Pacific 2 2026-04-29
CPA390 Cathay Pacific 1 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CPA253 HKG → LHR May 30, 06:50 UTCMay 30, 07:05 UTC15m
2026-05-29 CPA881 LAX → HKG May 29, 07:45 UTCMay 29, 22:25 UTC14h 40m
2026-05-28 CPA880 HKG → LAX May 28, 16:20 UTCMay 29, 04:50 UTC12h 30m
2026-05-27 CPA831 JFK → HKG May 27, 19:35 UTCMay 28, 10:50 UTC15h 15m
2026-05-27 CPA830 HKG → JFK May 27, 02:24 UTCMay 27, 17:05 UTC14h 41m
2026-05-27 CPA830 HKG → JFK May 27, 01:29 UTCMay 27, 01:49 UTC20m
2026-05-26 CPA883 LAX → HKG May 26, 06:39 UTCMay 26, 20:50 UTC14h 10m
2026-05-25 CPA882 HKG → LAX May 25, 11:05 UTCMay 25, 23:30 UTC12h 25m
2026-05-24 CPA252 LHR → HKG May 24, 11:35 UTCMay 24, 23:30 UTC11h 55m
2026-05-23 CPA251 HKG → LHR May 23, 23:30 UTCMay 24, 04:25 UTC4h 55m
2026-05-23 CPA251 HKG → LHR May 23, 15:25 UTCMay 23, 15:40 UTC15m
2026-05-22 CPA254 LHR → HKG May 22, 21:45 UTCMay 23, 09:55 UTC12h 9m
2026-05-22 CPA253 HKG → LHR May 22, 14:25 UTCMay 22, 19:30 UTC5h 5m
2026-05-22 CPA253 HKG → LHR May 22, 05:55 UTCMay 22, 06:10 UTC15m
2026-05-21 CPA252 LHR → HKG May 21, 11:45 UTCMay 21, 23:50 UTC12h 5m
2026-05-20 CPA251 HKG → LHR May 20, 23:40 UTCMay 21, 04:30 UTC4h 50m
2026-05-20 CPA251 HKG → LHR May 20, 15:15 UTCMay 20, 15:35 UTC20m
2026-05-20 CPA254 LHR → HKG May 20, 09:45 UTCMay 20, 10:15 UTC30m
2026-05-19 CPA254 LHR → HKG May 19, 22:10 UTCMay 20, 02:35 UTC4h 25m
2026-05-19 CPA253 HKG → LHR May 19, 15:10 UTCMay 19, 20:10 UTC5h 0m
2026-05-19 CPA253 HKG → LHR May 19, 06:10 UTCMay 19, 06:25 UTC15m
2026-05-18 CPA252 LHR → HKG May 18, 11:30 UTCMay 18, 23:35 UTC12h 4m
2026-05-17 CPA251 HKG → LHR May 17, 23:10 UTCMay 18, 04:40 UTC5h 30m
2026-05-17 CPA251 HKG → LHR May 17, 15:20 UTCMay 17, 15:40 UTC20m
2026-05-17 CPA254 LHR → HKG May 17, 09:20 UTCMay 17, 09:50 UTC30m
2026-05-16 CPA254 LHR → HKG May 16, 21:45 UTCMay 17, 02:50 UTC5h 5m
2026-05-16 CPA253 HKG → LHR May 16, 14:11 UTCMay 16, 19:10 UTC5h 0m
2026-05-16 CPA253 HKG → LHR May 16, 05:46 UTCMay 16, 06:06 UTC20m
2026-05-15 CPA234 MXP → HKG May 15, 11:05 UTCMay 15, 22:05 UTC10h 59m
2026-05-14 CPA233 HKG → MXP May 14, 17:25 UTCMay 15, 05:55 UTC12h 30m
2026-05-14 CPA391 PEK → HKG May 14, 01:15 UTCMay 14, 09:15 UTC8h 0m
2026-05-13 CPA881 LAX → HKG May 13, 07:45 UTCMay 13, 22:20 UTC14h 35m
2026-05-12 CPA880 HKG → LAX May 12, 16:35 UTCMay 13, 04:25 UTC11h 50m
2026-05-12 CPA391 PEK → HKG May 12, 08:55 UTCMay 12, 09:35 UTC40m
2026-05-09 CPA252 LHR → HKG May 9, 23:15 UTCMay 9, 23:50 UTC35m
2026-05-09 CPA252 LHR → HKG May 9, 11:45 UTCMay 9, 16:15 UTC4h 30m
2026-05-08 CPA251 HKG → LHR May 8, 23:55 UTCMay 9, 04:45 UTC4h 50m
2026-05-08 CPA251 HKG → LHR May 8, 15:05 UTCMay 8, 15:20 UTC15m
2026-05-07 CPA831 JFK → HKG May 7, 19:25 UTCMay 8, 10:39 UTC15h 15m
2026-05-07 CPA830 HKG → JFK May 7, 01:40 UTCMay 7, 16:45 UTC15h 5m
2026-05-05 CPA831 JFK → HKG May 5, 19:20 UTCMay 6, 10:15 UTC14h 55m
2026-05-05 CPA830 HKG → JFK May 5, 02:20 UTCMay 5, 16:55 UTC14h 35m
2026-05-03 CPA831 JFK → HKG May 3, 19:10 UTCMay 4, 10:15 UTC15h 5m
2026-05-03 CPA830 HKG → JFK May 3, 01:35 UTCMay 3, 16:20 UTC14h 44m
2026-05-02 CPA881 LAX → HKG May 2, 22:10 UTCMay 2, 22:30 UTC20m
2026-05-02 CPA881 LAX → HKG May 2, 07:40 UTCMay 2, 21:35 UTC13h 55m
2026-05-01 CPA880 HKG → LAX May 1, 16:35 UTCMay 2, 04:55 UTC12h 21m
2026-04-30 CPA831 JFK → HKG Apr 30, 19:30 UTCMay 1, 10:20 UTC14h 50m
2026-04-30 CPA830 HKG → JFK Apr 30, 01:35 UTCApr 30, 16:30 UTC14h 55m
2026-04-29 CPA138 SYD → HKG Apr 29, 20:50 UTCApr 29, 21:00 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-KQM page for operator, model, and routing details .

Mode-S 780A61 frequently asked

What is Mode-S code 780A61?
780A61 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-KQM.
Where is Mode-S 780A61 registered?
Mode-S code 780A61 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780A61 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780A61, octal 36005141, decimal 7,866,977.
What flights does 780A61 operate?
Mode-S 780A61 has broadcast 16 distinct callsigns, including CPA251, CPA253, CPA254, CPA252, CPA830.