Apparatus

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sensors Mode-S transponder

78924B

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HPF · AIRBUS A-321neo

Hex
78924B
Octal
36111113
Decimal
7,901,771
Country
CN
Tail
B-HPF
Type
A21N
No current signal · last broadcast 6h ago
Flights observed
198
Distinct callsigns
20
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 78924B.

Country allocation

The ICAO 24-bit address 78924B 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
CPA770 Cathay Pacific 9 2026-05-23
CPA708 Cathay Pacific 8 2026-05-19
CPA771 Cathay Pacific 7 2026-05-23
CPA569 Cathay Pacific 7 2026-05-30
CPA775 Cathay Pacific 6 2026-05-25
CPA754 Cathay Pacific 6 2026-05-26
CPA721 Cathay Pacific 6 2026-05-19
CPA706 Cathay Pacific 6 2026-05-25
CPA513 Cathay Pacific 6 2026-05-27
CPA396 - 6 2026-05-28
CPA307 - 6 2026-05-28
CPA755 Cathay Pacific 5 2026-05-26
CPA751 Cathay Pacific 5 2026-05-19
CPA340 Cathay Pacific 5 2026-05-15
CPA955 Cathay Pacific 4 2026-05-06
CPA733 Cathay Pacific 4 2026-05-21
CPA464 Cathay Pacific 4 2026-05-27
CPA423 Cathay Pacific 4 2026-05-01
CPA956 Cathay Pacific 3 2026-05-06
CPA947 Cathay Pacific 3 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CPA569 KIX → HKG May 30, 14:10 UTCMay 30, 14:30 UTC20m
2026-05-30 CPA569 KIX → HKG May 30, 10:55 UTCMay 30, 13:35 UTC2h 40m
2026-05-30 CPA598 HKG → KIX May 30, 05:30 UTCMay 30, 08:55 UTC3h 25m
2026-05-28 CPA307 - May 28, 14:15 UTCMay 28, 14:25 UTC10m
2026-05-28 CPA307 - May 28, 13:15 UTCMay 28, 13:30 UTC15m
2026-05-28 CPA396 - May 28, 10:40 UTCMay 28, 11:00 UTC20m
2026-05-28 CPA396 - May 28, 09:45 UTCMay 28, 10:00 UTC15m
2026-05-28 CPA927 CSX → HKG May 28, 02:55 UTCMay 28, 07:05 UTC4h 10m
2026-05-27 CPA469 TPE → HKG May 27, 14:40 UTCMay 27, 15:55 UTC1h 15m
2026-05-27 CPA464 HKG → TPE May 27, 12:40 UTCMay 27, 13:15 UTC35m
2026-05-27 CPA464 HKG → TPE May 27, 11:45 UTCMay 27, 12:00 UTC15m
2026-05-27 CPA513 FUK → HKG May 27, 07:55 UTCMay 27, 08:10 UTC15m
2026-05-27 CPA513 FUK → HKG May 27, 06:44 UTCMay 27, 07:20 UTC36m
2026-05-27 CPA513 FUK → HKG May 27, 05:19 UTCMay 27, 05:29 UTC10m
2026-05-27 CPA512 HKG → FUK May 27, 00:30 UTCMay 27, 00:44 UTC15m
2026-05-26 CPA754 BKK → HKG May 26, 08:04 UTCMay 26, 08:24 UTC20m
2026-05-26 CPA754 BKK → HKG May 26, 05:54 UTCMay 26, 06:39 UTC45m
2026-05-26 CPA755 HKG → BKK May 26, 01:44 UTCMay 26, 04:10 UTC2h 25m
2026-05-25 CPA706 BKK → HKG May 25, 11:40 UTCMay 25, 12:00 UTC20m
2026-05-25 CPA706 BKK → HKG May 25, 09:30 UTCMay 25, 10:15 UTC45m
2026-05-25 CPA775 HKG → BKK May 25, 07:25 UTCMay 25, 08:15 UTC50m
2026-05-25 CPA775 HKG → BKK May 25, 05:45 UTCMay 25, 06:00 UTC15m
2026-05-25 CPA730 KUL → HKG May 25, 03:40 UTCMay 25, 04:15 UTC35m
2026-05-24 CPA729 HKG → KUL May 24, 12:25 UTCMay 24, 13:05 UTC40m
2026-05-24 CPA729 HKG → KUL May 24, 09:35 UTCMay 24, 09:50 UTC15m
2026-05-24 CPA917 TFU → HKG May 24, 02:05 UTCMay 24, 02:35 UTC30m
2026-05-23 CPA916 HKG → TFU May 23, 12:05 UTCMay 23, 12:20 UTC15m
2026-05-23 CPA770 HKT → HKG May 23, 07:50 UTCMay 23, 08:25 UTC35m
2026-05-23 CPA770 HKT → HKG May 23, 02:05 UTCMay 23, 06:30 UTC4h 25m
2026-05-23 CPA771 HKG → HKT May 23, 00:25 UTCMay 23, 00:40 UTC15m
2026-05-22 CPA947 XIY → HKG May 22, 09:55 UTCMay 22, 10:25 UTC30m
2026-05-22 CPA946 HKG → XIY May 22, 03:30 UTCMay 22, 03:45 UTC15m
2026-05-21 CPA732 KUL → HKG May 21, 18:50 UTCMay 21, 22:20 UTC3h 30m
2026-05-21 CPA733 HKG → KUL May 21, 16:40 UTCMay 21, 16:55 UTC15m
2026-05-21 CPA733 HKG → KUL May 21, 13:40 UTCMay 21, 13:55 UTC15m
2026-05-21 CPA770 HKT → HKG May 21, 08:10 UTCMay 21, 08:25 UTC15m
2026-05-21 CPA770 HKT → HKG May 21, 02:25 UTCMay 21, 06:35 UTC4h 10m
2026-05-21 CPA771 HKG → HKT May 21, 00:30 UTCMay 21, 00:45 UTC15m
2026-05-20 CPA706 BKK → HKG May 20, 11:50 UTCMay 20, 12:00 UTC10m
2026-05-20 CPA706 BKK → HKG May 20, 09:40 UTCMay 20, 10:10 UTC30m
2026-05-20 CPA775 HKG → BKK May 20, 07:30 UTCMay 20, 08:15 UTC45m
2026-05-20 CPA775 HKG → BKK May 20, 05:35 UTCMay 20, 05:50 UTC15m
2026-05-20 CPA786 SGN → HKG May 20, 02:25 UTCMay 20, 02:45 UTC20m
2026-05-19 CPA721 HKG → SGN May 19, 15:00 UTCMay 19, 15:10 UTC10m
2026-05-19 CPA708 BKK → HKG May 19, 12:55 UTCMay 19, 13:00 UTC5m
2026-05-19 CPA708 BKK → HKG May 19, 10:50 UTCMay 19, 11:15 UTC25m
2026-05-19 CPA751 HKG → BKK May 19, 07:00 UTCMay 19, 09:25 UTC2h 25m
2026-05-19 CPA744 SGN → HKG May 19, 02:15 UTCMay 19, 02:20 UTC5m
2026-05-18 CPA721 HKG → SGN May 18, 14:55 UTCMay 18, 15:10 UTC15m
2026-05-18 CPA439 ICN → HKG May 18, 04:51 UTCMay 18, 08:01 UTC3h 10m

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

Mode-S 78924B frequently asked

What is Mode-S code 78924B?
78924B is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HPF.
Where is Mode-S 78924B registered?
Mode-S code 78924B is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78924B broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78924B, octal 36111113, decimal 7,901,771.
What flights does 78924B operate?
Mode-S 78924B has broadcast 20 distinct callsigns, including CPA770, CPA708, CPA771, CPA569, CPA775.