Apparatus

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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 1d ago
Flights observed
162
Distinct callsigns
20
Country
CN
Last broadcast
1d ago

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 13 2026-05-27
CPA776 Cathay Pacific 12 2026-05-14
CPA651 Cathay Pacific 9 2026-05-26
CPA777 Cathay Pacific 8 2026-05-14
CPA654 Cathay Pacific 8 2026-05-06
CPA653 Cathay Pacific 8 2026-05-06
CPA617 Cathay Pacific 5 2026-04-27
CPA783 Cathay Pacific 4 2026-05-12
CPA700 Cathay Pacific 4 2026-04-28
CPA539 Cathay Pacific 4 2026-05-09
CPA991 Cathay Pacific 3 2026-05-28
CPA990 Cathay Pacific 3 2026-05-28
CPA782 Cathay Pacific 3 2026-05-27
CPA622 Cathay Pacific 3 2026-05-03
CPA621 Cathay Pacific 3 2026-05-02
CPA608 Cathay Pacific 3 2026-05-26
CPA607 Cathay Pacific 3 2026-05-26
CPA965 Cathay Pacific 2 2026-05-06
CPA964 Cathay Pacific 2 2026-05-05
CPA771 Cathay Pacific 2 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 CPA991 FOC → HKG May 28, 14:15 UTCMay 28, 14:30 UTC15m
2026-05-28 CPA990 HKG → FOC May 28, 10:05 UTCMay 28, 10:20 UTC15m
2026-05-28 CPA335 PEK → HKG May 28, 04:30 UTCMay 28, 07:25 UTC2h 55m
2026-05-27 CPA334 HKG → PEK May 27, 23:50 UTCMay 28, 00:15 UTC25m
2026-05-27 CPA782 DPS → HKG May 27, 04:49 UTCMay 27, 15:30 UTC10h 41m
2026-05-27 CPA632 MAA → HKG May 27, 00:55 UTCMay 27, 01:14 UTC20m
2026-05-26 CPA651 HKG → MAA May 26, 14:55 UTCMay 26, 23:14 UTC8h 20m
2026-05-26 CPA651 HKG → MAA May 26, 13:10 UTCMay 26, 13:24 UTC15m
2026-05-26 CPA608 PNH → HKG May 26, 06:39 UTCMay 26, 06:59 UTC20m
2026-05-26 CPA607 HKG → PNH May 26, 01:00 UTCMay 26, 01:14 UTC15m
2026-05-25 CPA991 FOC → HKG May 25, 14:00 UTCMay 25, 14:15 UTC15m
2026-05-25 CPA990 HKG → FOC May 25, 10:05 UTCMay 25, 10:20 UTC15m
2026-05-25 CPA780 SUB → HKG May 25, 05:15 UTCMay 25, 05:35 UTC20m
2026-05-24 CPA629 HKG → SUB May 24, 09:00 UTCMay 25, 03:25 UTC18h 25m
2026-05-24 CPA629 HKG → SUB May 24, 06:50 UTCMay 25, 03:25 UTC20h 35m
2026-05-24 CPA995 FOC → HKG May 24, 04:50 UTCMay 24, 05:10 UTC20m
2026-05-24 CPA914 HKG → FOC May 24, 00:45 UTCMay 24, 01:00 UTC15m
2026-05-16 CPA600 PNH → HKG May 16, 14:20 UTCMay 16, 14:31 UTC10m
2026-05-16 CPA655 HKG → PNH May 16, 08:36 UTCMay 16, 08:51 UTC15m
2026-05-16 CPA750 BKK → HKG May 16, 06:31 UTCMay 16, 06:35 UTC5m
2026-05-16 CPA750 BKK → HKG May 16, 04:15 UTCMay 16, 05:00 UTC45m
2026-05-16 CPA705 HKG → BKK May 16, 02:10 UTCMay 16, 02:45 UTC35m
2026-05-16 CPA705 HKG → BKK May 16, 00:30 UTCMay 16, 00:45 UTC15m
2026-05-15 CPA632 MAA → HKG May 15, 00:45 UTCMay 15, 01:10 UTC25m
2026-05-14 CPA632 MAA → HKG May 14, 15:25 UTCMay 14, 22:35 UTC7h 10m
2026-05-14 CPA651 HKG → MAA May 14, 13:40 UTCMay 14, 13:55 UTC15m
2026-05-14 CPA776 CGK → HKG May 14, 11:50 UTCMay 14, 11:55 UTC5m
2026-05-14 CPA776 CGK → HKG May 14, 09:15 UTCMay 14, 09:50 UTC35m
2026-05-14 CPA776 CGK → HKG May 14, 07:35 UTCMay 14, 07:45 UTC10m
2026-05-14 CPA777 HKG → CGK May 14, 01:40 UTCMay 14, 01:55 UTC15m
2026-05-13 CPA776 CGK → HKG May 13, 11:55 UTCMay 13, 12:15 UTC20m
2026-05-13 CPA776 CGK → HKG May 13, 09:35 UTCMay 13, 10:00 UTC25m
2026-05-13 CPA777 HKG → CGK May 13, 05:55 UTCMay 13, 06:10 UTC15m
2026-05-13 CPA777 HKG → CGK May 13, 01:50 UTCMay 13, 02:05 UTC15m
2026-05-12 CPA782 DPS → HKG May 12, 15:25 UTCMay 12, 15:40 UTC15m
2026-05-12 CPA783 HKG → DPS May 12, 05:10 UTCMay 12, 13:30 UTC8h 20m
2026-05-12 CPA710 SIN → HKG May 12, 02:45 UTCMay 12, 03:00 UTC15m
2026-05-11 CPA659 HKG → SIN May 11, 18:05 UTCMay 11, 18:20 UTC15m
2026-05-11 CPA783 HKG → DPS May 11, 05:35 UTCMay 11, 16:15 UTC10h 40m
2026-05-11 CPA632 MAA → HKG May 11, 03:25 UTCMay 11, 03:55 UTC30m
2026-05-10 CPA632 MAA → HKG May 10, 18:05 UTCMay 11, 01:20 UTC7h 15m
2026-05-10 CPA651 HKG → MAA May 10, 16:20 UTCMay 10, 16:34 UTC15m
2026-05-10 CPA479 TPE → HKG May 10, 13:19 UTCMay 10, 14:45 UTC1h 25m
2026-05-10 CPA402 HKG → TPE May 10, 10:35 UTCMay 10, 12:00 UTC1h 25m
2026-05-10 CPA608 PNH → HKG May 10, 06:50 UTCMay 10, 06:59 UTC10m
2026-05-10 CPA607 HKG → PNH May 10, 00:55 UTCMay 10, 01:09 UTC15m
2026-05-09 CPA539 NGO → HKG May 9, 07:45 UTCMay 9, 11:30 UTC3h 45m
2026-05-09 CPA536 HKG → NGO May 9, 02:40 UTCMay 9, 05:35 UTC2h 55m
2026-05-08 CPA776 CGK → HKG May 8, 11:44 UTCMay 8, 12:00 UTC15m
2026-05-08 CPA776 CGK → HKG May 8, 09:25 UTCMay 8, 09:54 UTC30m

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 1d ago.
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, CPA776, CPA651, CPA777, CPA654.