Apparatus

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sensors Mode-S transponder

789251

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-LDS · AIRBUS A-330-200

Hex
789251
Octal
36111121
Decimal
7,901,777
Country
CN
Tail
B-LDS
Type
A332
No current signal · last broadcast Jul 25, 21:45 UTC
Flights observed
202
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 21:45 UTC

Last known position

Most recent position reported by Mode-S 789251.

Country allocation

The ICAO 24-bit address 789251 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
AHK783 - 35 2026-07-01
AHK326 - 25 2026-07-02
AHK327 - 19 2026-07-01
AHK842 - 18 2026-06-25
AHK831 - 17 2026-06-24
AHK129 Air Hong Kong 14 2026-06-05
AHK128 Air Hong Kong 12 2026-06-04
AHK782 Air Hong Kong 10 2026-07-25
CPA2015 - 7 2026-06-23
AHK317 Air Hong Kong 7 2026-06-19
AHK769 - 5 2026-07-04
AHK768 - 5 2026-07-02
CPA2026 - 4 2026-06-23
AHK316 Air Hong Kong 4 2026-04-24
AHK205 Air Hong Kong 4 2026-06-03
CPA3073 - 2 2026-06-27
CPA2072 - 2 2026-06-27
AHK842D Air Hong Kong 2 2026-05-15
AHK204D Air Hong Kong 2 2026-06-03
AHK204 Air Hong Kong 2 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AHK782 HKG → PVG Jul 25, 20:40 UTCJul 25, 21:45 UTC1h 5m
2026-07-24 AHK9557 SHA → HKG Jul 24, 02:20 UTCJul 24, 03:00 UTC40m
2026-07-05 AHK9556 - Jul 5, 21:30 UTCJul 5, 22:55 UTC1h 25m
2026-07-04 AHK769 - Jul 4, 14:30 UTCJul 4, 17:25 UTC2h 55m
2026-07-02 AHK768 - Jul 2, 19:45 UTCJul 2, 20:10 UTC25m
2026-07-02 AHK326 - Jul 2, 17:10 UTCJul 2, 17:25 UTC15m
2026-07-02 AHK326 - Jul 2, 13:55 UTCJul 2, 14:20 UTC25m
2026-07-01 AHK327 - Jul 1, 23:10 UTCJul 1, 23:40 UTC30m
2026-07-01 AHK327 - Jul 1, 20:25 UTCJul 1, 20:40 UTC15m
2026-07-01 AHK783 - Jul 1, 15:30 UTCJul 1, 16:55 UTC1h 25m
2026-06-30 AHK783 - Jun 30, 20:20 UTCJul 1, 16:55 UTC20h 35m
2026-06-30 AHK769 - Jun 30, 15:05 UTCJun 30, 18:00 UTC2h 55m
2026-06-29 AHK768 - Jun 29, 19:54 UTCJun 29, 20:15 UTC20m
2026-06-29 AHK783 - Jun 29, 15:39 UTCJun 29, 17:05 UTC1h 25m
2026-06-27 AHK782 - Jun 27, 20:55 UTCJun 27, 22:04 UTC1h 10m
2026-06-27 CPA2072 - Jun 27, 10:19 UTCJun 27, 10:40 UTC20m
2026-06-27 CPA2072 - Jun 27, 07:10 UTCJun 27, 07:24 UTC15m
2026-06-27 CPA3073 - Jun 27, 04:09 UTCJun 27, 04:49 UTC40m
2026-06-27 CPA3073 - Jun 27, 01:15 UTCJun 27, 01:39 UTC25m
2026-06-26 AHK783 - Jun 26, 16:54 UTCJun 26, 17:15 UTC20m
2026-06-26 AHK783 - Jun 26, 15:49 UTCJun 26, 16:24 UTC35m
2026-06-25 AHK782 - Jun 25, 20:19 UTCJun 26, 16:24 UTC20h 5m
2026-06-25 AHK842 - Jun 25, 17:39 UTCJun 25, 17:44 UTC5m
2026-06-25 AHK842 - Jun 25, 15:20 UTCJun 25, 17:05 UTC1h 45m
2026-06-24 AHK831 HKG → BKK Jun 24, 20:09 UTCJun 24, 22:25 UTC2h 15m
2026-06-24 AHK783 - Jun 24, 16:05 UTCJun 24, 17:25 UTC1h 20m
2026-06-23 AHK783 - Jun 23, 20:19 UTCJun 24, 17:25 UTC21h 5m
2026-06-23 AHK783 HKG → HKG Jun 23, 20:04 UTCJun 24, 17:25 UTC21h 20m
2026-06-23 CPA2015 - Jun 23, 15:50 UTCJun 23, 16:09 UTC20m
2026-06-23 CPA2015 - Jun 23, 14:55 UTCJun 23, 15:19 UTC25m
2026-06-23 CPA2026 HKG → TPE Jun 23, 12:09 UTCJun 23, 13:29 UTC1h 20m
2026-06-22 AHK326 - Jun 22, 18:09 UTCJun 22, 18:30 UTC20m
2026-06-22 AHK326 - Jun 22, 15:10 UTCJun 22, 15:24 UTC15m
2026-06-20 AHK327 - Jun 20, 23:04 UTCJun 20, 23:19 UTC15m
2026-06-20 AHK327 - Jun 20, 20:25 UTCJun 20, 20:40 UTC15m
2026-06-20 AHK326 - Jun 20, 13:34 UTCJun 20, 16:59 UTC3h 25m
2026-06-19 AHK317 HKG → SIN Jun 19, 23:44 UTCJun 20, 00:14 UTC30m
2026-06-19 AHK317 HKG → SIN Jun 19, 20:59 UTCJun 19, 21:14 UTC15m
2026-06-18 AHK783 - Jun 18, 22:25 UTCJun 19, 16:55 UTC18h 29m
2026-06-18 AHK783 HKG → HKG Jun 18, 21:25 UTCJun 19, 16:55 UTC19h 29m
2026-06-18 AHK783 - Jun 18, 16:55 UTCJun 18, 18:25 UTC1h 30m
2026-06-17 AHK783 HKG → HKG Jun 17, 20:25 UTCJun 18, 18:25 UTC22h 0m
2026-06-17 AHK769 - Jun 17, 16:35 UTCJun 17, 17:05 UTC30m
2026-06-16 AHK768 HKG → PEK Jun 16, 19:55 UTCJun 17, 17:05 UTC21h 10m
2026-06-16 CPA2015 TPE → HKG Jun 16, 15:00 UTCJun 16, 15:15 UTC15m
2026-06-16 CPA2015 TPE → HKG Jun 16, 13:55 UTCJun 16, 14:25 UTC30m
2026-06-16 CPA2026 HKG → TPE Jun 16, 10:35 UTCJun 16, 11:55 UTC1h 20m
2026-06-15 AHK769 - Jun 15, 19:00 UTCJun 15, 19:39 UTC40m
2026-06-13 AHK768 HKG → PEK Jun 13, 19:55 UTCJun 13, 20:20 UTC25m
2026-06-13 AHK783 - Jun 13, 15:30 UTCJun 13, 16:55 UTC1h 25m

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

Mode-S 789251 frequently asked

What is Mode-S code 789251?
789251 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-LDS.
Where is Mode-S 789251 registered?
Mode-S code 789251 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 789251 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 789251, octal 36111121, decimal 7,901,777.
What flights does 789251 operate?
Mode-S 789251 has broadcast 20 distinct callsigns, including AHK783, AHK326, AHK327, AHK842, AHK831.