Apparatus

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sensors Mode-S transponder

789237

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HNX · BOEING 777-300

Hex
789237
Octal
36111067
Decimal
7,901,751
Country
CN
Tail
B-HNX
Type
B773
No current signal · last broadcast 7h ago
Flights observed
236
Distinct callsigns
20
Country
CN
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 789237.

Country allocation

The ICAO 24-bit address 789237 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 - 18 2026-07-08
CPA451 Cathay Pacific 17 2026-06-12
CPA564 - 14 2026-07-08
CPA507 - 12 2026-07-03
CPA974 - 9 2026-06-30
CPA913 - 9 2026-06-30
CPA506 - 9 2026-07-03
CPA504 - 9 2026-06-12
CPA450 - 8 2026-07-01
CPA543 - 7 2026-07-14
CPA521 - 7 2026-07-11
CPA411 - 7 2026-06-30
CPA903 - 5 2026-06-20
CPA902 - 5 2026-06-20
CPA785 - 5 2026-07-07
CPA718 Cathay Pacific 5 2026-04-20
CPA520 - 5 2026-07-11
CPA930 - 4 2026-07-13
CPA918 - 4 2026-07-02
CPA906 - 4 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CPA381 HKG → HKG Jul 14, 07:25 UTCJul 14, 13:30 UTC6h 5m
2026-07-14 CPA543 HND → HKG Jul 14, 01:35 UTCJul 14, 05:15 UTC3h 40m
2026-07-13 CPA542 HKG → HND Jul 13, 08:45 UTCJul 13, 12:35 UTC3h 50m
2026-07-13 CPA930 - Jul 13, 06:05 UTCJul 13, 06:35 UTC30m
2026-07-13 CPA930 - Jul 13, 04:50 UTCJul 13, 05:20 UTC30m
2026-07-13 CPA901 HKG → MNL Jul 13, 01:15 UTCJul 13, 03:05 UTC1h 50m
2026-07-12 CPA764 - Jul 12, 14:30 UTCJul 12, 14:45 UTC15m
2026-07-12 CPA769 - Jul 12, 08:35 UTCJul 12, 08:50 UTC15m
2026-07-12 CPA973 - Jul 12, 05:10 UTCJul 12, 05:25 UTC15m
2026-07-12 CPA970 - Jul 12, 01:45 UTCJul 12, 01:55 UTC10m
2026-07-11 CPA521 - Jul 11, 12:30 UTCJul 11, 12:35 UTC5m
2026-07-11 CPA521 - Jul 11, 08:55 UTCJul 11, 11:55 UTC3h 0m
2026-07-11 CPA520 HKG → NRT Jul 11, 03:10 UTCJul 11, 07:10 UTC4h 0m
2026-07-08 CPA565 TPE → HKG Jul 8, 11:10 UTCJul 8, 12:30 UTC1h 20m
2026-07-08 CPA565 KIX → TPE Jul 8, 07:40 UTCJul 8, 09:50 UTC2h 10m
2026-07-08 CPA564 TPE → KIX Jul 8, 03:25 UTCJul 8, 05:40 UTC2h 15m
2026-07-08 CPA564 HKG → TPE Jul 8, 00:30 UTCJul 8, 01:50 UTC1h 20m
2026-07-07 CPA784 - Jul 7, 14:30 UTCJul 7, 14:45 UTC15m
2026-07-07 CPA785 - Jul 7, 04:15 UTCJul 7, 12:20 UTC8h 5m
2026-07-06 CPA565 TPE → HKG Jul 6, 11:30 UTCJul 6, 12:45 UTC1h 15m
2026-07-06 CPA565 KIX → TPE Jul 6, 07:40 UTCJul 6, 09:55 UTC2h 15m
2026-07-06 CPA564 TPE → KIX Jul 6, 03:40 UTCJul 6, 05:55 UTC2h 15m
2026-07-06 CPA564 HKG → TPE Jul 6, 00:30 UTCJul 6, 02:00 UTC1h 30m
2026-07-05 CPA764 SGN → HKG Jul 5, 13:20 UTCJul 5, 13:40 UTC20m
2026-07-05 CPA769 - Jul 5, 08:00 UTCJul 5, 08:15 UTC15m
2026-07-05 CPA543 - Jul 5, 05:30 UTCJul 5, 05:50 UTC20m
2026-07-05 CPA543 - Jul 5, 02:00 UTCJul 5, 04:55 UTC2h 55m
2026-07-04 CPA542 HKG → HND Jul 4, 08:45 UTCJul 4, 12:20 UTC3h 35m
2026-07-04 CPA766 - Jul 4, 06:40 UTCJul 4, 06:45 UTC5m
2026-07-04 CPA767 - Jul 4, 00:55 UTCJul 4, 01:10 UTC15m
2026-07-03 CPA507 - Jul 3, 12:40 UTCJul 3, 13:00 UTC20m
2026-07-03 CPA507 - Jul 3, 09:45 UTCJul 3, 12:00 UTC2h 15m
2026-07-03 CPA506 - Jul 3, 05:30 UTCJul 3, 07:45 UTC2h 15m
2026-07-03 CPA506 - Jul 3, 04:40 UTCJul 3, 04:55 UTC15m
2026-07-03 CPA303 - Jul 3, 01:45 UTCJul 3, 02:05 UTC20m
2026-07-02 CPA302 - Jul 2, 13:55 UTCJul 3, 01:15 UTC11h 20m
2026-07-02 CPA918 - Jul 2, 10:00 UTCJul 2, 12:00 UTC2h 0m
2026-07-02 CPA919 HKG → MNL Jul 2, 06:30 UTCJul 2, 08:25 UTC1h 55m
2026-07-02 CPA431 - Jul 2, 04:35 UTCJul 2, 04:55 UTC20m
2026-07-02 CPA431 - Jul 2, 03:50 UTCJul 2, 04:05 UTC15m
2026-07-02 CPA432 HKG → KHH Jul 2, 01:15 UTCJul 2, 02:25 UTC1h 10m
2026-07-01 CPA505 - Jul 1, 10:05 UTCJul 1, 14:10 UTC4h 5m
2026-07-01 CPA450 TPE → NRT Jul 1, 05:15 UTCJul 1, 08:00 UTC2h 45m
2026-07-01 CPA450 HKG → TPE Jul 1, 02:20 UTCJul 1, 03:35 UTC1h 15m
2026-06-30 CPA974 - Jun 30, 22:15 UTCJun 30, 23:45 UTC1h 30m
2026-06-30 CPA913 - Jun 30, 12:55 UTCJun 30, 14:45 UTC1h 50m
2026-06-30 CPA411 - Jun 30, 09:50 UTCJun 30, 10:10 UTC20m
2026-06-30 CPA411 - Jun 30, 07:10 UTCJun 30, 09:20 UTC2h 10m
2026-06-30 CPA410 HKG → ICN Jun 30, 02:30 UTCJun 30, 05:40 UTC3h 10m
2026-06-28 CPA507 - Jun 28, 13:34 UTCJun 28, 13:49 UTC15m

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

Mode-S 789237 frequently asked

What is Mode-S code 789237?
789237 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HNX.
Where is Mode-S 789237 registered?
Mode-S code 789237 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 789237 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 789237, octal 36111067, decimal 7,901,751.
What flights does 789237 operate?
Mode-S 789237 has broadcast 20 distinct callsigns, including CPA565, CPA451, CPA564, CPA507, CPA974.