Apparatus

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sensors Mode-S transponder

780171

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HNI · BOEING 777-300

Hex
780171
Octal
36000561
Decimal
7,864,689
Country
CN
Tail
B-HNI
Type
B773
No current signal · last broadcast 1h ago
Flights observed
404
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 780171.

Country allocation

The ICAO 24-bit address 780171 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
CPA565 - 26 2026-07-10
CPA450 - 22 2026-07-06
CPA564 - 21 2026-07-10
CPA505 - 18 2026-07-06
CPA930 - 16 2026-07-09
CPA901 - 15 2026-07-09
CPA521 - 15 2026-07-01
CPA451 - 14 2026-07-03
CPA918 - 13 2026-07-11
CPA798 - 12 2026-06-19
CPA520 - 11 2026-07-01
CPA411 - 10 2026-06-19
CPA718 Cathay Pacific 9 2026-06-01
CPA507 Cathay Pacific 9 2026-06-10
CPA431 - 9 2026-07-08
CPA719 Cathay Pacific 8 2026-05-31
CPA410 - 8 2026-06-19
CPA381 - 8 2026-06-18
CPA974 - 7 2026-07-08
CPA919 - 7 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CPA741 - Jul 14, 01:05 UTCJul 14, 01:15 UTC10m
2026-07-12 CPA421 - Jul 12, 10:20 UTCJul 12, 10:30 UTC10m
2026-07-12 CPA421 - Jul 12, 09:15 UTCJul 12, 09:50 UTC35m
2026-07-12 CPA420 - Jul 12, 06:05 UTCJul 12, 07:35 UTC1h 30m
2026-07-11 CPA918 - Jul 11, 11:25 UTCJul 11, 11:40 UTC15m
2026-07-11 CPA918 - Jul 11, 09:55 UTCJul 11, 10:25 UTC30m
2026-07-11 CPA919 HKG → MNL Jul 11, 06:30 UTCJul 11, 08:15 UTC1h 45m
2026-07-10 CPA565 - Jul 10, 11:30 UTCJul 10, 12:50 UTC1h 20m
2026-07-10 CPA565 - Jul 10, 09:40 UTCJul 10, 10:05 UTC25m
2026-07-10 CPA565 - Jul 10, 07:45 UTCJul 10, 08:20 UTC35m
2026-07-10 CPA564 TPE → KIX Jul 10, 03:50 UTCJul 10, 06:05 UTC2h 15m
2026-07-10 CPA564 - Jul 10, 00:40 UTCJul 10, 01:55 UTC1h 15m
2026-07-09 CPA742 - Jul 9, 14:05 UTCJul 9, 14:25 UTC20m
2026-07-09 CPA743 - Jul 9, 09:15 UTCJul 9, 09:30 UTC15m
2026-07-09 CPA930 - Jul 9, 06:20 UTCJul 9, 06:35 UTC15m
2026-07-09 CPA930 - Jul 9, 04:55 UTCJul 9, 05:25 UTC30m
2026-07-09 CPA901 - Jul 9, 02:25 UTCJul 9, 03:05 UTC40m
2026-07-09 CPA901 - Jul 9, 01:20 UTCJul 9, 01:40 UTC20m
2026-07-08 CPA974 - Jul 8, 23:15 UTCJul 8, 23:30 UTC15m
2026-07-08 CPA974 - Jul 8, 21:50 UTCJul 8, 22:25 UTC35m
2026-07-08 CPA913 - Jul 8, 14:30 UTCJul 8, 15:05 UTC35m
2026-07-08 CPA913 - Jul 8, 13:30 UTCJul 8, 13:45 UTC15m
2026-07-08 CPA918 - Jul 8, 11:25 UTCJul 8, 11:40 UTC15m
2026-07-08 CPA918 - Jul 8, 10:00 UTCJul 8, 10:30 UTC30m
2026-07-08 CPA919 HKG → MNL Jul 8, 06:50 UTCJul 8, 08:30 UTC1h 40m
2026-07-08 CPA431 KHH → HKG Jul 8, 03:55 UTCJul 8, 05:05 UTC1h 10m
2026-07-08 CPA432 HKG → KHH Jul 8, 01:00 UTCJul 8, 02:00 UTC1h 0m
2026-07-07 CPA565 - Jul 7, 12:15 UTCJul 7, 13:45 UTC1h 30m
2026-07-07 CPA565 - Jul 7, 09:20 UTCJul 7, 09:45 UTC25m
2026-07-07 CPA565 - Jul 7, 07:30 UTCJul 7, 08:05 UTC35m
2026-07-07 CPA564 TPE → KIX Jul 7, 03:45 UTCJul 7, 06:00 UTC2h 15m
2026-07-07 CPA564 HKG → TPE Jul 7, 01:15 UTCJul 7, 02:35 UTC1h 20m
2026-07-06 CPA505 NRT → HKG Jul 6, 10:00 UTCJul 6, 13:55 UTC3h 55m
2026-07-06 CPA450 - Jul 6, 05:25 UTCJul 6, 08:15 UTC2h 50m
2026-07-06 CPA450 HKG → TPE Jul 6, 02:45 UTCJul 6, 04:10 UTC1h 25m
2026-07-05 CPA505 - Jul 5, 14:15 UTCJul 5, 14:25 UTC10m
2026-07-05 CPA505 - Jul 5, 10:40 UTCJul 5, 13:40 UTC3h 0m
2026-07-05 CPA450 TPE → NRT Jul 5, 06:00 UTCJul 5, 09:00 UTC3h 0m
2026-07-05 CPA450 HKG → TPE Jul 5, 02:50 UTCJul 5, 04:30 UTC1h 40m
2026-07-04 CPA505 - Jul 4, 13:40 UTCJul 4, 14:00 UTC20m
2026-07-04 CPA505 - Jul 4, 10:05 UTCJul 4, 13:00 UTC2h 55m
2026-07-04 CPA450 - Jul 4, 07:10 UTCJul 4, 07:55 UTC45m
2026-07-04 CPA450 - Jul 4, 05:05 UTCJul 4, 05:20 UTC15m
2026-07-04 CPA450 HKG → TPE Jul 4, 02:15 UTCJul 4, 03:40 UTC1h 25m
2026-07-03 CPA451 - Jul 3, 14:20 UTCJul 3, 14:40 UTC20m
2026-07-03 CPA451 - Jul 3, 13:20 UTCJul 3, 13:45 UTC25m
2026-07-03 CPA451 - Jul 3, 10:55 UTCJul 3, 11:15 UTC20m
2026-07-03 CPA451 - Jul 3, 08:20 UTCJul 3, 09:35 UTC1h 15m
2026-07-03 CPA504 HKG → NRT Jul 3, 02:55 UTCJul 3, 06:35 UTC3h 40m
2026-07-02 CPA505 - Jul 2, 14:20 UTCJul 2, 14:40 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-HNI page for operator, model, and routing details .

Mode-S 780171 frequently asked

What is Mode-S code 780171?
780171 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HNI.
Where is Mode-S 780171 registered?
Mode-S code 780171 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780171 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780171, octal 36000561, decimal 7,864,689.
What flights does 780171 operate?
Mode-S 780171 has broadcast 20 distinct callsigns, including CPA565, CPA450, CPA564, CPA505, CPA930.