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sensors Mode-S transponder

7801C9

ICAO 24-bit transponder address · allocated to China

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

Hex
7801C9
Octal
36000711
Decimal
7,864,777
Country
CN
Tail
B-LAD
Type
A333
No current signal · last broadcast Jul 26, 17:20 UTC
Flights observed
370
Distinct callsigns
20
Country
CN
Last broadcast
Jul 26, 17:20 UTC

Last known position

Most recent position reported by Mode-S 7801C9.

Country allocation

The ICAO 24-bit address 7801C9 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
CPA632 Cathay Pacific 23 2026-07-23
CPA651 Cathay Pacific 21 2026-07-22
CPA776 - 14 2026-06-27
CPA654 Cathay Pacific 13 2026-07-22
CPA653 Cathay Pacific 13 2026-07-22
CPA782 Cathay Pacific 10 2026-07-24
CPA777 - 10 2026-06-27
CPA715 - 10 2026-07-13
CPA393 Cathay Pacific 10 2026-07-25
CPA714 - 9 2026-07-13
CPA783 Cathay Pacific 8 2026-07-24
CPA617 Cathay Pacific 7 2026-06-18
CPA503 - 7 2026-06-26
CPA392 Cathay Pacific 7 2026-07-25
CPA991 - 6 2026-07-08
CPA990 - 6 2026-07-08
CPA700 - 6 2026-06-19
CPA502 - 6 2026-06-25
CPA710 Cathay Pacific 5 2026-07-22
CPA652 Cathay Pacific 5 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CPA408 HKG → TPE Jul 26, 15:50 UTCJul 26, 17:15 UTC1h 25m
2026-07-25 CPA393 PEK → HKG Jul 25, 14:40 UTCJul 25, 15:10 UTC30m
2026-07-25 CPA393 PEK → HKG Jul 25, 12:10 UTCJul 25, 12:30 UTC20m
2026-07-25 CPA392 HKG → PEK Jul 25, 08:45 UTCJul 25, 09:00 UTC15m
2026-07-25 CPA392 HKG → PEK Jul 25, 06:20 UTCJul 25, 06:40 UTC20m
2026-07-25 CPA983 CAN → HKG Jul 25, 02:50 UTCJul 25, 03:25 UTC35m
2026-07-25 CPA982 HKG → CAN Jul 25, 00:05 UTCJul 25, 00:25 UTC20m
2026-07-24 CPA782 DPS → HKG Jul 24, 15:10 UTCJul 24, 15:25 UTC15m
2026-07-24 CPA783 HKG → DPS Jul 24, 05:00 UTCJul 24, 13:15 UTC8h 15m
2026-07-23 CPA964 HKG → HGH Jul 23, 13:20 UTCJul 24, 02:10 UTC12h 50m
2026-07-23 CPA954 HKG → TAO Jul 23, 02:50 UTCJul 23, 10:15 UTC7h 25m
2026-07-23 CPA632 MAA → HKG Jul 23, 00:40 UTCJul 23, 00:45 UTC5m
2026-07-22 CPA651 HKG → MAA Jul 22, 13:10 UTCJul 22, 22:50 UTC9h 40m
2026-07-22 CPA654 BKK → HKG Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-22 CPA653 HKG → BKK Jul 22, 04:30 UTCJul 22, 04:45 UTC15m
2026-07-22 CPA710 SIN → HKG Jul 22, 02:40 UTCJul 22, 02:55 UTC15m
2026-07-21 CPA710 SIN → HKG Jul 21, 23:35 UTCJul 21, 23:50 UTC15m
2026-07-21 CPA659 HKG → SIN Jul 21, 20:50 UTCJul 21, 21:20 UTC30m
2026-07-21 CPA659 HKG → SIN Jul 21, 18:05 UTCJul 21, 18:20 UTC15m
2026-07-21 CPA782 - Jul 21, 15:05 UTCJul 21, 15:30 UTC25m
2026-07-21 CPA782 - Jul 21, 06:55 UTCJul 21, 13:25 UTC6h 30m
2026-07-21 CPA783 HKG → DPS Jul 21, 04:45 UTCJul 21, 05:10 UTC25m
2026-07-20 CPA413 ICN → HKG Jul 20, 23:35 UTCJul 21, 02:30 UTC2h 55m
2026-07-20 CPA430 HKG → ICN Jul 20, 10:05 UTCJul 20, 13:25 UTC3h 20m
2026-07-17 CPA335 XZM → HKG Jul 17, 07:00 UTCJul 17, 07:35 UTC35m
2026-07-17 CPA335 - Jul 17, 04:35 UTCJul 17, 04:49 UTC15m
2026-07-16 CPA334 HKG → PEK Jul 16, 23:44 UTCJul 17, 00:04 UTC20m
2026-07-16 CPA782 - Jul 16, 16:09 UTCJul 16, 16:35 UTC25m
2026-07-16 CPA782 - Jul 16, 07:00 UTCJul 16, 14:20 UTC7h 20m
2026-07-16 CPA783 - Jul 16, 05:45 UTCJul 16, 06:05 UTC20m
2026-07-15 CPA964 - Jul 15, 13:25 UTCJul 16, 02:10 UTC12h 45m
2026-07-15 CPA356 HKG → HKG Jul 15, 03:15 UTCJul 15, 08:45 UTC5h 30m
2026-07-15 CPA632 - Jul 15, 00:55 UTCJul 15, 01:10 UTC15m
2026-07-14 CPA651 - Jul 14, 15:05 UTCJul 14, 22:55 UTC7h 49m
2026-07-14 CPA651 - Jul 14, 13:05 UTCJul 14, 13:15 UTC10m
2026-07-14 CPA758 - Jul 14, 09:15 UTCJul 14, 09:45 UTC30m
2026-07-14 CPA758 - Jul 14, 05:55 UTCJul 14, 06:20 UTC25m
2026-07-14 CPA759 - Jul 14, 03:45 UTCJul 14, 04:05 UTC20m
2026-07-14 CPA759 - Jul 14, 01:00 UTCJul 14, 01:15 UTC15m
2026-07-13 CPA714 - Jul 13, 18:15 UTCJul 13, 21:45 UTC3h 30m
2026-07-13 CPA715 - Jul 13, 16:10 UTCJul 13, 16:45 UTC35m
2026-07-13 CPA715 - Jul 13, 13:25 UTCJul 13, 13:40 UTC15m
2026-07-13 CPA973 - Jul 13, 05:40 UTCJul 13, 05:55 UTC15m
2026-07-13 CPA970 - Jul 13, 01:50 UTCJul 13, 02:05 UTC15m
2026-07-12 CPA714 - Jul 12, 21:30 UTCJul 12, 22:00 UTC30m
2026-07-12 CPA714 - Jul 12, 18:25 UTCJul 12, 18:55 UTC30m
2026-07-12 CPA715 - Jul 12, 16:15 UTCJul 12, 16:45 UTC30m
2026-07-12 CPA715 - Jul 12, 13:35 UTCJul 12, 13:50 UTC15m
2026-07-12 CPA654 - Jul 12, 10:25 UTCJul 12, 10:40 UTC15m
2026-07-12 CPA654 - Jul 12, 08:20 UTCJul 12, 08:30 UTC10m

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

Mode-S 7801C9 frequently asked

What is Mode-S code 7801C9?
7801C9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-LAD.
Where is Mode-S 7801C9 registered?
Mode-S code 7801C9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7801C9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7801C9, octal 36000711, decimal 7,864,777.
What flights does 7801C9 operate?
Mode-S 7801C9 has broadcast 20 distinct callsigns, including CPA632, CPA651, CPA776, CPA654, CPA653.