Apparatus

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sensors Mode-S transponder

78018D

ICAO 24-bit transponder address · allocated to China

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

Hex
78018D
Octal
36000615
Decimal
7,864,717
Country
CN
Tail
B-HLM
Type
A333
No current signal · last broadcast Jul 26, 13:30 UTC
Flights observed
424
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 13:30 UTC

Last known position

Most recent position reported by Mode-S 78018D.

Country allocation

The ICAO 24-bit address 78018D 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 - 20 2026-07-18
CPA530 - 14 2026-07-18
CPA937 Cathay Pacific 13 2026-07-19
CPA700 - 10 2026-06-25
CPA945 Cathay Pacific 9 2026-07-24
CPA928 Cathay Pacific 9 2026-07-24
CPA473 - 9 2026-07-02
CPA989 Cathay Pacific 8 2026-07-25
CPA936 - 8 2026-07-19
CPA931 Cathay Pacific 8 2026-07-20
CPA617 Cathay Pacific 8 2026-06-24
CPA407 Cathay Pacific 8 2026-07-25
CPA988 Cathay Pacific 7 2026-07-25
CPA961 - 7 2026-06-28
CPA960 - 7 2026-07-15
CPA939 Cathay Pacific 7 2026-07-02
CPA912 - 7 2026-07-03
CPA344 Cathay Pacific 7 2026-07-26
CPA331 - 7 2026-06-27
CPA983 Cathay Pacific 6 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CPA344 HKG → PEK Jul 26, 13:10 UTCJul 26, 13:30 UTC20m
2026-07-25 CPA989 CAN → HKG Jul 25, 15:45 UTCJul 25, 16:25 UTC40m
2026-07-25 CPA988 HKG → CAN Jul 25, 12:25 UTCJul 25, 12:45 UTC20m
2026-07-25 CPA357 NKG → HKG Jul 25, 03:35 UTCJul 25, 09:45 UTC6h 10m
2026-07-25 CPA407 TPE → HKG Jul 25, 00:10 UTCJul 25, 01:30 UTC1h 20m
2026-07-24 CPA408 HKG → TPE Jul 24, 15:40 UTCJul 24, 17:05 UTC1h 25m
2026-07-24 CPA945 CKG → HKG Jul 24, 11:10 UTCJul 24, 11:45 UTC35m
2026-07-24 CPA928 HKG → CKG Jul 24, 05:55 UTCJul 24, 06:10 UTC15m
2026-07-21 CPA979 XMN → HKG Jul 21, 13:45 UTCJul 21, 14:30 UTC45m
2026-07-21 CPA978 - Jul 21, 10:25 UTCJul 21, 10:40 UTC15m
2026-07-21 CPA987 TFU → HKG Jul 21, 08:05 UTCJul 21, 08:40 UTC35m
2026-07-21 CPA986 HKG → TFU Jul 21, 02:40 UTCJul 21, 02:55 UTC15m
2026-07-20 CPA953 CAN → HKG Jul 20, 21:25 UTCJul 20, 21:55 UTC30m
2026-07-20 CPA950 HKG → CAN Jul 20, 17:50 UTCJul 20, 18:05 UTC15m
2026-07-20 CPA931 WUH → HKG Jul 20, 14:20 UTCJul 20, 14:55 UTC35m
2026-07-20 CPA938 - Jul 20, 10:05 UTCJul 20, 10:20 UTC15m
2026-07-20 CPA431 KHH → HKG Jul 20, 05:30 UTCJul 20, 06:35 UTC1h 5m
2026-07-20 CPA432 HKG → KHH Jul 20, 03:05 UTCJul 20, 04:10 UTC1h 5m
2026-07-19 CPA953 CAN → HKG Jul 19, 21:45 UTCJul 19, 22:20 UTC35m
2026-07-19 CPA950 HKG → CAN Jul 19, 18:10 UTCJul 19, 18:40 UTC30m
2026-07-19 CPA926 HKG → HKG Jul 19, 07:45 UTCJul 19, 13:55 UTC6h 10m
2026-07-19 CPA937 WUH → HKG Jul 19, 04:45 UTCJul 19, 05:25 UTC40m
2026-07-19 CPA936 - Jul 19, 00:20 UTCJul 19, 00:35 UTC15m
2026-07-18 CPA531 - Jul 18, 12:05 UTCJul 18, 13:15 UTC1h 10m
2026-07-18 CPA531 - Jul 18, 10:05 UTCJul 18, 10:25 UTC20m
2026-07-18 CPA531 - Jul 18, 08:10 UTCJul 18, 08:50 UTC40m
2026-07-18 CPA530 - Jul 18, 03:55 UTCJul 18, 06:25 UTC2h 30m
2026-07-18 CPA530 HKG → TPE Jul 18, 01:00 UTCJul 18, 02:29 UTC1h 30m
2026-07-17 CPA926 HKG → HKG Jul 17, 08:00 UTCJul 17, 14:30 UTC6h 30m
2026-07-17 CPA995 - Jul 17, 04:25 UTCJul 17, 05:10 UTC45m
2026-07-17 CPA914 - Jul 17, 01:09 UTCJul 17, 01:25 UTC15m
2026-07-16 CPA953 - Jul 16, 21:45 UTCJul 16, 22:15 UTC30m
2026-07-16 CPA950 - Jul 16, 18:19 UTCJul 16, 18:34 UTC15m
2026-07-16 CPA925 HKG → HKG Jul 16, 08:50 UTCJul 16, 15:10 UTC6h 20m
2026-07-16 CPA948 - Jul 16, 06:50 UTCJul 16, 07:05 UTC15m
2026-07-16 CPA921 - Jul 16, 00:40 UTCJul 16, 06:15 UTC5h 35m
2026-07-15 CPA989 - Jul 15, 16:05 UTCJul 15, 16:40 UTC35m
2026-07-15 CPA988 - Jul 15, 13:15 UTCJul 15, 13:30 UTC15m
2026-07-15 CPA960 - Jul 15, 04:55 UTCJul 15, 10:55 UTC6h 0m
2026-07-15 CPA345 - Jul 15, 00:00 UTCJul 15, 03:05 UTC3h 5m
2026-07-14 CPA344 - Jul 14, 11:25 UTCJul 14, 11:40 UTC15m
2026-07-13 CPA345 - Jul 13, 23:55 UTCJul 14, 02:45 UTC2h 50m
2026-07-13 CPA344 - Jul 13, 11:20 UTCJul 13, 11:35 UTC15m
2026-07-13 CPA356 HKG → HKG Jul 13, 02:55 UTCJul 13, 08:35 UTC5h 40m
2026-07-12 CPA393 - Jul 12, 11:05 UTCJul 12, 14:15 UTC3h 10m
2026-07-12 CPA392 - Jul 12, 06:10 UTCJul 12, 06:25 UTC15m
2026-07-11 CPA931 - Jul 11, 14:30 UTCJul 11, 15:00 UTC30m
2026-07-11 CPA938 - Jul 11, 10:10 UTCJul 11, 10:25 UTC15m
2026-07-11 CPA948 - Jul 11, 06:15 UTCJul 11, 06:30 UTC15m
2026-07-11 CPA921 - Jul 11, 00:25 UTCJul 11, 05:25 UTC5h 0m

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

Mode-S 78018D frequently asked

What is Mode-S code 78018D?
78018D is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HLM.
Where is Mode-S 78018D registered?
Mode-S code 78018D is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 78018D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 78018D, octal 36000615, decimal 7,864,717.
What flights does 78018D operate?
Mode-S 78018D has broadcast 20 distinct callsigns, including CPA531, CPA530, CPA937, CPA700, CPA945.