Apparatus

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sensors Mode-S transponder

78019C

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HLT · AIRBUS A-330-300

Hex
78019C
Octal
36000634
Decimal
7,864,732
Country
CN
Tail
B-HLT
Type
A333
No current signal · last broadcast 1h ago
Flights observed
289
Distinct callsigns
20
Country
CN
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 78019C.

Country allocation

The ICAO 24-bit address 78019C 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
CPA531 Cathay Pacific 12 2026-06-05
CPA953 - 8 2026-07-12
CPA950 - 8 2026-07-12
CPA945 Cathay Pacific 6 2026-06-10
CPA937 - 6 2026-07-12
CPA750 Cathay Pacific 6 2026-06-07
CPA705 Cathay Pacific 6 2026-06-07
CPA597 Cathay Pacific 6 2026-04-26
CPA530 Cathay Pacific 6 2026-06-05
CPA503 Cathay Pacific 6 2026-04-19
CPA337 Cathay Pacific 6 2026-06-15
CPA336 - 6 2026-06-15
CPA991 - 5 2026-07-13
CPA990 - 5 2026-07-13
CPA982 Cathay Pacific 5 2026-06-10
CPA939 Cathay Pacific 5 2026-05-26
CPA912 Cathay Pacific 5 2026-05-27
CPA704 Cathay Pacific 5 2026-04-28
CPA701 Cathay Pacific 5 2026-04-28
CPA995 Cathay Pacific 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CPA472 - Jul 14, 08:40 UTCJul 14, 08:55 UTC15m
2026-07-14 CPA958 HKG → HKG Jul 14, 00:10 UTCJul 14, 05:40 UTC5h 30m
2026-07-13 CPA991 - Jul 13, 13:30 UTCJul 13, 14:40 UTC1h 10m
2026-07-13 CPA990 - Jul 13, 10:25 UTCJul 13, 10:45 UTC20m
2026-07-13 CPA948 - Jul 13, 06:20 UTCJul 13, 06:40 UTC20m
2026-07-13 CPA948 - Jul 13, 01:25 UTCJul 13, 05:31 UTC4h 5m
2026-07-13 CPA921 - Jul 13, 00:20 UTCJul 13, 00:40 UTC20m
2026-07-12 CPA953 - Jul 12, 21:30 UTCJul 12, 21:50 UTC20m
2026-07-12 CPA950 - Jul 12, 18:30 UTCJul 12, 18:45 UTC15m
2026-07-12 CPA926 - Jul 12, 13:25 UTCJul 12, 13:45 UTC20m
2026-07-12 CPA925 - Jul 12, 07:31 UTCJul 12, 12:35 UTC5h 5m
2026-07-12 CPA937 - Jul 12, 00:40 UTCJul 12, 05:20 UTC4h 40m
2026-07-11 CPA780 - Jul 11, 05:15 UTCJul 11, 05:40 UTC25m
2026-07-10 CPA780 - Jul 10, 09:05 UTCJul 11, 03:35 UTC18h 30m
2026-07-10 CPA629 - Jul 10, 07:05 UTCJul 11, 03:35 UTC20h 30m
2026-07-10 CPA629 - Jul 10, 06:50 UTCJul 11, 03:35 UTC20h 46m
2026-07-09 CPA3821 - Jul 9, 17:55 UTCJul 9, 20:30 UTC2h 35m
2026-06-15 CPA3940 - Jun 15, 19:30 UTCJun 15, 19:45 UTC15m
2026-06-15 CPA337 PEK → HKG Jun 15, 17:34 UTCJun 15, 17:59 UTC25m
2026-06-15 CPA336 - Jun 15, 08:35 UTCJun 15, 09:00 UTC25m
2026-06-15 CPA658 - Jun 15, 05:25 UTCJun 15, 05:55 UTC30m
2026-06-15 CPA658 - Jun 15, 02:15 UTCJun 15, 02:39 UTC25m
2026-06-14 CPA711 - Jun 14, 12:00 UTCJun 14, 12:40 UTC40m
2026-06-14 CPA711 - Jun 14, 09:25 UTCJun 14, 09:40 UTC15m
2026-06-14 CPA365 - Jun 14, 04:05 UTCJun 14, 04:15 UTC10m
2026-06-13 CPA364 HKG → PVG Jun 13, 09:40 UTCJun 14, 03:35 UTC17h 55m
2026-06-13 CPA937 - Jun 13, 01:25 UTCJun 13, 06:25 UTC4h 59m
2026-06-12 CPA926 CEB → HKG Jun 12, 08:00 UTCJun 12, 14:15 UTC6h 15m
2026-06-12 CPA959 HGH → HKG Jun 12, 05:50 UTCJun 12, 06:10 UTC20m
2026-06-12 CPA958 - Jun 12, 00:10 UTCJun 12, 00:25 UTC15m
2026-06-11 CPA991 FOC → HKG Jun 11, 14:30 UTCJun 11, 14:55 UTC25m
2026-06-11 CPA990 HKG → FOC Jun 11, 10:30 UTCJun 11, 10:45 UTC15m
2026-06-11 CPA937 WUH → HKG Jun 11, 05:15 UTCJun 11, 05:55 UTC40m
2026-06-11 CPA936 HKG → WUH Jun 11, 01:15 UTCJun 11, 01:30 UTC15m
2026-06-10 CPA953 CAN → HKG Jun 10, 21:50 UTCJun 10, 22:10 UTC20m
2026-06-10 CPA950 HKG → CAN Jun 10, 17:45 UTCJun 10, 18:10 UTC25m
2026-06-10 CPA945 CKG → HKG Jun 10, 11:10 UTCJun 10, 11:35 UTC25m
2026-06-10 CPA928 HKG → CKG Jun 10, 06:10 UTCJun 10, 06:30 UTC20m
2026-06-10 CPA983 CAN → HKG Jun 10, 03:15 UTCJun 10, 03:35 UTC20m
2026-06-10 CPA982 HKG → CAN Jun 10, 00:45 UTCJun 10, 01:05 UTC20m
2026-06-09 CPA953 CAN → HKG Jun 9, 21:50 UTCJun 9, 22:20 UTC30m
2026-06-09 CPA950 HKG → CAN Jun 9, 18:25 UTCJun 9, 18:55 UTC30m
2026-06-09 CPA337 PEK → HKG Jun 9, 11:55 UTCJun 9, 14:40 UTC2h 45m
2026-06-09 CPA336 HKG → PEK Jun 9, 07:35 UTCJun 9, 07:50 UTC15m
2026-06-08 CPA337 PEK → HKG Jun 8, 16:25 UTCJun 8, 16:50 UTC25m
2026-06-08 CPA337 PEK → HKG Jun 8, 13:50 UTCJun 8, 14:10 UTC20m
2026-06-08 CPA336 HKG → PEK Jun 8, 11:50 UTCJun 8, 12:10 UTC20m
2026-06-08 CPA336 HKG → PEK Jun 8, 08:35 UTCJun 8, 08:50 UTC15m
2026-06-08 CPA658 SIN → HKG Jun 8, 05:10 UTCJun 8, 05:40 UTC30m
2026-06-08 CPA658 SIN → HKG Jun 8, 02:05 UTCJun 8, 02:30 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-HLT page for operator, model, and routing details .

Mode-S 78019C frequently asked

What is Mode-S code 78019C?
78019C is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HLT.
Where is Mode-S 78019C registered?
Mode-S code 78019C is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78019C broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78019C, octal 36000634, decimal 7,864,732.
What flights does 78019C operate?
Mode-S 78019C has broadcast 20 distinct callsigns, including CPA531, CPA953, CPA950, CPA945, CPA937.