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 Jul 26, 14:30 UTC
Flights observed
290
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 14:30 UTC

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 Cathay Pacific 34 2026-07-25
CPA564 Cathay Pacific 31 2026-07-25
CPA451 - 20 2026-07-15
CPA507 - 12 2026-07-03
CPA504 - 10 2026-07-15
CPA974 - 9 2026-06-30
CPA913 - 9 2026-06-30
CPA506 - 9 2026-07-03
CPA521 - 8 2026-07-18
CPA450 - 8 2026-07-01
CPA718 Cathay Pacific 7 2026-07-20
CPA543 - 7 2026-07-14
CPA411 - 7 2026-06-30
CPA742 - 6 2026-07-16
CPA520 Cathay Pacific 6 2026-07-18
CPA903 - 5 2026-06-20
CPA902 - 5 2026-06-20
CPA785 - 5 2026-07-07
CPA743 - 5 2026-07-16
CPA542 Cathay Pacific 5 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CPA542 HKG → HND Jul 26, 10:40 UTCJul 26, 14:25 UTC3h 45m
2026-07-25 CPA565 TPE → HKG Jul 25, 12:40 UTCJul 25, 13:55 UTC1h 15m
2026-07-25 CPA565 TPE → HKG Jul 25, 09:45 UTCJul 25, 10:05 UTC20m
2026-07-25 CPA565 TPE → HKG Jul 25, 07:50 UTCJul 25, 08:30 UTC40m
2026-07-25 CPA564 HKG → TPE Jul 25, 05:05 UTCJul 25, 05:45 UTC40m
2026-07-25 CPA564 HKG → TPE Jul 25, 03:35 UTCJul 25, 03:45 UTC10m
2026-07-25 CPA564 HKG → TPE Jul 25, 00:30 UTCJul 25, 01:55 UTC1h 25m
2026-07-24 CPA565 TPE → HKG Jul 24, 12:00 UTCJul 24, 13:10 UTC1h 10m
2026-07-24 CPA565 TPE → HKG Jul 24, 09:55 UTCJul 24, 10:25 UTC30m
2026-07-24 CPA565 TPE → HKG Jul 24, 08:00 UTCJul 24, 08:35 UTC35m
2026-07-24 CPA564 HKG → TPE Jul 24, 05:45 UTCJul 24, 06:35 UTC50m
2026-07-24 CPA564 HKG → TPE Jul 24, 04:15 UTCJul 24, 04:30 UTC15m
2026-07-24 CPA564 HKG → TPE Jul 24, 00:25 UTCJul 24, 01:55 UTC1h 30m
2026-07-23 CPA565 TPE → HKG Jul 23, 11:25 UTCJul 23, 12:50 UTC1h 25m
2026-07-23 CPA565 TPE → HKG Jul 23, 09:30 UTCJul 23, 09:45 UTC15m
2026-07-23 CPA565 TPE → HKG Jul 23, 07:35 UTCJul 23, 08:15 UTC40m
2026-07-23 CPA564 HKG → TPE Jul 23, 05:00 UTCJul 23, 05:40 UTC40m
2026-07-23 CPA564 HKG → TPE Jul 23, 03:25 UTCJul 23, 03:40 UTC15m
2026-07-23 CPA564 HKG → TPE Jul 23, 00:25 UTCJul 23, 01:45 UTC1h 20m
2026-07-22 CPA565 TPE → HKG Jul 22, 11:20 UTCJul 22, 12:45 UTC1h 25m
2026-07-22 CPA564 HKG → TPE Jul 22, 05:10 UTCJul 22, 05:20 UTC10m
2026-07-22 CPA564 HKG → TPE Jul 22, 03:35 UTCJul 22, 03:50 UTC15m
2026-07-22 CPA564 HKG → TPE Jul 22, 00:30 UTCJul 22, 01:50 UTC1h 20m
2026-07-21 CPA565 TPE → HKG Jul 21, 12:25 UTCJul 21, 13:40 UTC1h 15m
2026-07-21 CPA565 TPE → HKG Jul 21, 10:25 UTCJul 21, 10:40 UTC15m
2026-07-21 CPA565 TPE → HKG Jul 21, 08:20 UTCJul 21, 09:00 UTC40m
2026-07-21 CPA564 HKG → TPE Jul 21, 05:00 UTCJul 21, 05:40 UTC40m
2026-07-21 CPA564 HKG → TPE Jul 21, 03:25 UTCJul 21, 03:40 UTC15m
2026-07-21 CPA564 HKG → TPE Jul 21, 00:35 UTCJul 21, 02:05 UTC1h 30m
2026-07-20 CPA764 SGN → HKG Jul 20, 13:30 UTCJul 20, 13:50 UTC20m
2026-07-20 CPA769 HKG → SGN Jul 20, 07:50 UTCJul 20, 08:05 UTC15m
2026-07-20 CPA718 CGK → HKG Jul 20, 05:15 UTCJul 20, 05:45 UTC30m
2026-07-20 CPA718 CGK → HKG Jul 20, 03:10 UTCJul 20, 03:35 UTC25m
2026-07-19 CPA797 - Jul 19, 17:15 UTCJul 19, 17:35 UTC20m
2026-07-19 CPA797 - Jul 19, 13:30 UTCJul 19, 13:45 UTC15m
2026-07-19 CPA589 - Jul 19, 08:25 UTCJul 19, 11:05 UTC2h 40m
2026-07-19 CPA588 - Jul 19, 06:00 UTCJul 19, 06:15 UTC15m
2026-07-19 CPA588 - Jul 19, 03:40 UTCJul 19, 05:00 UTC1h 20m
2026-07-18 CPA303 HKG → HKG Jul 18, 16:50 UTCJul 19, 01:35 UTC8h 45m
2026-07-18 CPA521 NRT → HKG Jul 18, 09:40 UTCJul 18, 13:25 UTC3h 45m
2026-07-18 CPA520 HKG → NRT Jul 18, 03:40 UTCJul 18, 07:50 UTC4h 10m
2026-07-17 CPA302 HKG → HKG Jul 17, 15:35 UTCJul 18, 01:30 UTC9h 55m
2026-07-17 CPA565 TPE → HKG Jul 17, 12:25 UTCJul 17, 13:40 UTC1h 15m
2026-07-17 CPA565 - Jul 17, 09:25 UTCJul 17, 09:50 UTC25m
2026-07-17 CPA565 - Jul 17, 07:40 UTCJul 17, 08:20 UTC40m
2026-07-17 CPA564 HKG → TPE Jul 17, 03:34 UTCJul 17, 05:50 UTC2h 15m
2026-07-17 CPA564 HKG → TPE Jul 17, 00:35 UTCJul 17, 01:59 UTC1h 25m
2026-07-16 CPA742 - Jul 16, 13:54 UTCJul 16, 14:29 UTC35m
2026-07-16 CPA742 - Jul 16, 12:55 UTCJul 16, 13:05 UTC10m
2026-07-16 CPA743 - Jul 16, 09:35 UTCJul 16, 10:00 UTC25m

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 Jul 26, 14:30 UTC.
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, CPA564, CPA451, CPA507, CPA504.