Apparatus

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sensors Mode-S transponder

7801CA

ICAO 24-bit transponder address · allocated to China

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

Hex
7801CA
Octal
36000712
Decimal
7,864,778
Country
CN
Tail
B-LAE
Type
A333
No current signal · last broadcast 6h ago
Flights observed
166
Distinct callsigns
20
Country
CN
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7801CA.

Country allocation

The ICAO 24-bit address 7801CA 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 11 2026-06-03
CPA651 Cathay Pacific 9 2026-06-02
CPA654 Cathay Pacific 8 2026-05-23
CPA653 Cathay Pacific 7 2026-05-23
CPA539 Cathay Pacific 6 2026-05-22
CPA777 Cathay Pacific 5 2026-05-06
CPA998 Cathay Pacific 4 2026-05-16
CPA997 Cathay Pacific 4 2026-05-17
CPA991 Cathay Pacific 4 2026-05-02
CPA990 Cathay Pacific 4 2026-05-02
CPA954 Cathay Pacific 4 2026-05-30
CPA776 Cathay Pacific 4 2026-05-06
CPA335 Cathay Pacific 4 2026-04-29
CPA951 Cathay Pacific 3 2026-05-30
CPA655 Cathay Pacific 3 2026-06-01
CPA608 Cathay Pacific 3 2026-05-11
CPA607 Cathay Pacific 3 2026-05-11
CPA600 Cathay Pacific 3 2026-06-01
CPA536 Cathay Pacific 3 2026-05-22
CPA503 Cathay Pacific 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-04 CPA629 HKG → SUB Jun 4, 07:15 UTCJun 4, 09:50 UTC2h 35m
2026-06-04 CPA995 FOC → HKG Jun 4, 05:15 UTCJun 4, 05:20 UTC5m
2026-06-04 CPA914 HKG → FOC Jun 4, 00:50 UTCJun 4, 01:05 UTC15m
2026-06-03 CPA782 DPS → HKG Jun 3, 15:25 UTCJun 3, 15:50 UTC25m
2026-06-03 CPA783 HKG → DPS Jun 3, 05:05 UTCJun 3, 13:40 UTC8h 35m
2026-06-03 CPA632 MAA → HKG Jun 3, 00:25 UTCJun 3, 00:45 UTC20m
2026-06-02 CPA651 HKG → MAA Jun 2, 12:55 UTCJun 2, 22:50 UTC9h 55m
2026-06-02 CPA634 PEN → HKG Jun 2, 08:10 UTCJun 2, 08:25 UTC15m
2026-06-02 CPA633 HKG → PEN Jun 2, 00:35 UTCJun 2, 00:50 UTC15m
2026-06-01 CPA600 PNH → HKG Jun 1, 13:35 UTCJun 1, 13:55 UTC20m
2026-06-01 CPA655 HKG → PNH Jun 1, 07:45 UTCJun 1, 08:00 UTC15m
2026-06-01 CPA658 SIN → HKG Jun 1, 05:25 UTCJun 1, 05:40 UTC15m
2026-06-01 CPA658 SIN → HKG Jun 1, 02:05 UTCJun 1, 02:35 UTC30m
2026-05-31 CPA711 HKG → SIN May 31, 09:30 UTCMay 31, 13:00 UTC3h 30m
2026-05-31 CPA632 MAA → HKG May 31, 00:40 UTCMay 31, 00:45 UTC5m
2026-05-30 CPA651 HKG → MAA May 30, 13:45 UTCMay 30, 22:55 UTC9h 10m
2026-05-30 CPA651 HKG → MAA May 30, 13:00 UTCMay 30, 13:10 UTC10m
2026-05-30 CPA951 TAO → HKG May 30, 09:55 UTCMay 30, 10:05 UTC10m
2026-05-30 CPA954 HKG → TAO May 30, 02:35 UTCMay 30, 09:25 UTC6h 50m
2026-05-29 CPA989 CAN → HKG May 29, 16:35 UTCMay 29, 16:55 UTC20m
2026-05-29 CPA988 HKG → CAN May 29, 12:20 UTCMay 29, 12:55 UTC35m
2026-05-29 CPA421 TPE → HKG May 29, 08:55 UTCMay 29, 10:10 UTC1h 15m
2026-05-29 CPA420 HKG → TPE May 29, 06:45 UTCMay 29, 07:10 UTC25m
2026-05-29 CPA420 HKG → TPE May 29, 05:50 UTCMay 29, 06:10 UTC20m
2026-05-28 CPA531 TPE → HKG May 28, 12:10 UTCMay 28, 13:20 UTC1h 10m
2026-05-28 CPA531 TPE → HKG May 28, 08:00 UTCMay 28, 10:30 UTC2h 30m
2026-05-28 CPA530 HKG → TPE May 28, 03:40 UTCMay 28, 05:55 UTC2h 15m
2026-05-28 CPA530 HKG → TPE May 28, 00:45 UTCMay 28, 02:10 UTC1h 25m
2026-05-27 CPA600 PNH → HKG May 27, 13:45 UTCMay 27, 14:05 UTC20m
2026-05-27 CPA655 HKG → PNH May 27, 07:45 UTCMay 27, 08:00 UTC15m
2026-05-27 CPA503 KIX → HKG May 27, 01:14 UTCMay 27, 04:24 UTC3h 10m
2026-05-26 CPA502 HKG → KIX May 26, 08:54 UTCMay 26, 12:14 UTC3h 20m
2026-05-26 CPA347 PEK → HKG May 26, 02:24 UTCMay 26, 05:20 UTC2h 55m
2026-05-25 CPA344 HKG → PEK May 25, 11:25 UTCMay 25, 11:40 UTC15m
2026-05-25 CPA740 HAN → HKG May 25, 05:45 UTCMay 25, 06:20 UTC35m
2026-05-24 CPA951 TAO → HKG May 24, 10:15 UTCMay 24, 10:30 UTC15m
2026-05-24 CPA954 HKG → TAO May 24, 02:55 UTCMay 24, 09:35 UTC6h 40m
2026-05-24 CPA632 MAA → HKG May 24, 00:20 UTCMay 24, 00:55 UTC35m
2026-05-23 CPA632 MAA → HKG May 23, 15:00 UTCMay 23, 22:25 UTC7h 25m
2026-05-23 CPA651 HKG → MAA May 23, 13:25 UTCMay 23, 13:40 UTC15m
2026-05-23 CPA654 BKK → HKG May 23, 10:25 UTCMay 23, 10:40 UTC15m
2026-05-23 CPA654 BKK → HKG May 23, 08:15 UTCMay 23, 09:00 UTC45m
2026-05-23 CPA653 HKG → BKK May 23, 06:00 UTCMay 23, 06:35 UTC35m
2026-05-23 CPA653 HKG → BKK May 23, 04:20 UTCMay 23, 04:35 UTC15m
2026-05-22 CPA632 MAA → HKG May 22, 15:10 UTCMay 23, 00:55 UTC9h 45m
2026-05-22 CPA651 HKG → MAA May 22, 13:30 UTCMay 22, 13:45 UTC15m
2026-05-22 CPA539 NGO → HKG May 22, 11:20 UTCMay 22, 11:35 UTC15m
2026-05-22 CPA539 NGO → HKG May 22, 08:00 UTCMay 22, 10:45 UTC2h 45m
2026-05-22 CPA536 HKG → NGO May 22, 02:35 UTCMay 22, 05:55 UTC3h 20m
2026-05-21 CPA539 NGO → HKG May 21, 11:15 UTCMay 21, 11:30 UTC15m

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

Mode-S 7801CA frequently asked

What is Mode-S code 7801CA?
7801CA is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-LAE.
Where is Mode-S 7801CA registered?
Mode-S code 7801CA is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7801CA broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7801CA, octal 36000712, decimal 7,864,778.
What flights does 7801CA operate?
Mode-S 7801CA has broadcast 20 distinct callsigns, including CPA632, CPA651, CPA654, CPA653, CPA539.