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 Jul 25, 13:30 UTC
Flights observed
434
Distinct callsigns
20
Country
CN
Last broadcast
Jul 25, 13:30 UTC

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
CPA730 Cathay Pacific 17 2026-07-17
CPA708 Cathay Pacific 16 2026-07-20
CPA729 - 14 2026-07-16
CPA751 Cathay Pacific 12 2026-07-20
CPA706 - 12 2026-07-17
CPA775 - 11 2026-07-17
CPA774 - 11 2026-07-18
CPA569 - 11 2026-07-12
CPA307 - 11 2026-06-30
CPA770 - 10 2026-06-26
CPA513 Cathay Pacific 10 2026-07-21
CPA396 - 10 2026-06-30
CPA340 Cathay Pacific 10 2026-07-20
CPA721 - 9 2026-07-01
CPA423 - 9 2026-06-29
CPA956 Cathay Pacific 8 2026-07-25
CPA906 Cathay Pacific 8 2026-07-22
CPA771 - 8 2026-06-26
CPA754 - 8 2026-07-15
CPA733 - 8 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CPA304 HKG → NKG Jul 25, 12:25 UTCJul 25, 13:30 UTC1h 5m
2026-07-25 CPA955 NGB → HKG Jul 25, 08:15 UTCJul 25, 10:00 UTC1h 45m
2026-07-25 CPA956 HKG → NGB Jul 25, 03:55 UTCJul 25, 05:25 UTC1h 30m
2026-07-24 CPA742 RUH → HKG Jul 24, 14:05 UTCJul 24, 14:40 UTC35m
2026-07-24 CPA742 RUH → HKG Jul 24, 13:10 UTCJul 24, 13:20 UTC10m
2026-07-24 CPA743 HKG → BAH Jul 24, 10:55 UTCJul 24, 11:05 UTC10m
2026-07-24 CPA743 HKG → BAH Jul 24, 09:45 UTCJul 24, 10:00 UTC15m
2026-07-24 CPA740 HAN → HKG Jul 24, 05:55 UTCJul 24, 06:25 UTC30m
2026-07-24 CPA740 HAN → HKG Jul 24, 04:45 UTCJul 24, 04:55 UTC10m
2026-07-24 CPA741 HKG → HAN Jul 24, 01:35 UTCJul 24, 01:45 UTC10m
2026-07-23 CPA427 ICN → HKG Jul 23, 17:00 UTCJul 23, 20:10 UTC3h 10m
2026-07-23 CPA426 HKG → ICN Jul 23, 12:20 UTCJul 23, 15:30 UTC3h 10m
2026-07-23 CPA529 - Jul 23, 08:25 UTCJul 23, 09:55 UTC1h 30m
2026-07-23 CPA529 - Jul 23, 06:55 UTCJul 23, 07:10 UTC15m
2026-07-23 CPA528 HKG → FUK Jul 23, 05:00 UTCJul 23, 05:25 UTC25m
2026-07-23 CPA528 HKG → FUK Jul 23, 02:30 UTCJul 23, 03:55 UTC1h 25m
2026-07-22 CPA427 ICN → HKG Jul 22, 17:10 UTCJul 22, 20:15 UTC3h 5m
2026-07-22 CPA426 HKG → ICN Jul 22, 12:05 UTCJul 22, 15:20 UTC3h 15m
2026-07-22 CPA906 MNL → HKG Jul 22, 03:10 UTCJul 22, 04:55 UTC1h 45m
2026-07-21 CPA907 HKG → MNL Jul 21, 23:50 UTCJul 22, 01:35 UTC1h 45m
2026-07-21 CPA469 TPE → HKG Jul 21, 14:35 UTCJul 21, 15:55 UTC1h 20m
2026-07-21 CPA464 HKG → TPE Jul 21, 11:50 UTCJul 21, 13:25 UTC1h 35m
2026-07-21 CPA513 FUK → HKG Jul 21, 06:15 UTCJul 21, 09:15 UTC3h 0m
2026-07-21 CPA512 HKG → FUK Jul 21, 01:25 UTCJul 21, 04:10 UTC2h 45m
2026-07-20 CPA395 PEK → HKG Jul 20, 19:50 UTCJul 20, 22:55 UTC3h 5m
2026-07-20 CPA340 HKG → PEK Jul 20, 17:35 UTCJul 20, 17:45 UTC10m
2026-07-20 CPA340 HKG → PEK Jul 20, 15:00 UTCJul 20, 15:20 UTC20m
2026-07-20 CPA708 BKK → HKG Jul 20, 13:05 UTCJul 20, 13:25 UTC20m
2026-07-20 CPA708 BKK → HKG Jul 20, 11:00 UTCJul 20, 11:30 UTC30m
2026-07-20 CPA751 HKG → BKK Jul 20, 09:05 UTCJul 20, 09:40 UTC35m
2026-07-20 CPA751 HKG → BKK Jul 20, 07:15 UTCJul 20, 07:25 UTC10m
2026-07-20 CPA906 MNL → HKG Jul 20, 05:25 UTCJul 20, 05:50 UTC25m
2026-07-20 CPA906 MNL → HKG Jul 20, 04:00 UTCJul 20, 04:55 UTC55m
2026-07-20 CPA907 HKG → MNL Jul 20, 00:10 UTCJul 20, 01:55 UTC1h 45m
2026-07-19 CPA778 - Jul 19, 14:35 UTCJul 19, 14:50 UTC15m
2026-07-19 CPA773 - Jul 19, 09:10 UTCJul 19, 10:00 UTC50m
2026-07-19 CPA773 - Jul 19, 07:15 UTCJul 19, 07:30 UTC15m
2026-07-19 CPA959 - Jul 19, 05:25 UTCJul 19, 05:45 UTC20m
2026-07-19 CPA958 - Jul 19, 00:05 UTCJul 19, 01:10 UTC1h 5m
2026-07-18 CPA774 - Jul 18, 07:30 UTCJul 18, 07:50 UTC20m
2026-07-18 CPA774 - Jul 18, 05:15 UTCJul 18, 05:30 UTC15m
2026-07-18 CPA717 - Jul 18, 03:25 UTCJul 18, 03:40 UTC15m
2026-07-18 CPA717 - Jul 18, 01:20 UTCJul 18, 01:34 UTC15m
2026-07-17 CPA732 KUL → HKG Jul 17, 22:35 UTCJul 17, 23:00 UTC25m
2026-07-17 CPA732 KUL → HKG Jul 17, 19:30 UTCJul 17, 19:45 UTC15m
2026-07-17 CPA733 - Jul 17, 17:25 UTCJul 17, 17:55 UTC30m
2026-07-17 CPA733 - Jul 17, 14:30 UTCJul 17, 14:44 UTC15m
2026-07-17 CPA706 - Jul 17, 12:00 UTCJul 17, 12:19 UTC20m
2026-07-17 CPA706 - Jul 17, 09:50 UTCJul 17, 10:05 UTC15m
2026-07-17 CPA775 - Jul 17, 07:55 UTCJul 17, 08:15 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-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 Jul 25, 13:30 UTC.
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 CPA730, CPA708, CPA729, CPA751, CPA706.