Apparatus

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sensors Mode-S transponder

7801B7

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-HNO · BOEING 777-300

Hex
7801B7
Octal
36000667
Decimal
7,864,759
Country
CN
Tail
B-HNO
Type
B773
Broadcasting now · callsign CPA506 · 35,000 ft
Flights observed
180
Distinct callsigns
20
Country
CN
Last broadcast
14h ago

Current position

7801B7 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7801B7 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
CPA450 Cathay Pacific 11 2026-05-13
CPA785 Cathay Pacific 10 2026-05-25
CPA784 Cathay Pacific 9 2026-05-25
CPA411 Cathay Pacific 9 2026-04-29
CPA543 Cathay Pacific 8 2026-05-23
CPA520 Cathay Pacific 8 2026-05-29
CPA505 Cathay Pacific 8 2026-05-13
CPA918 Cathay Pacific 7 2026-05-28
CPA521 Cathay Pacific 7 2026-05-29
CPA410 Cathay Pacific 7 2026-04-29
CPA798 Cathay Pacific 6 2026-05-01
CPA718 Cathay Pacific 6 2026-05-17
CPA542 Cathay Pacific 6 2026-05-22
CPA362 Cathay Pacific 6 2026-05-27
CPA303 Cathay Pacific 6 2026-05-29
CPA919 Cathay Pacific 5 2026-05-28
CPA907 Cathay Pacific 5 2026-05-08
CPA507 Cathay Pacific 5 2026-05-21
CPA361 Cathay Pacific 5 2026-05-28
CPA974 Cathay Pacific 4 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 CPA521 NRT → HKG May 29, 09:15 UTCMay 29, 13:15 UTC4h 0m
2026-05-29 CPA520 HKG → NRT May 29, 03:40 UTCMay 29, 07:25 UTC3h 45m
2026-05-29 CPA303 PVG → HKG May 29, 01:30 UTCMay 29, 01:40 UTC10m
2026-05-28 CPA302 HKG → PVG May 28, 13:55 UTCMay 29, 00:50 UTC10h 55m
2026-05-28 CPA918 MNL → HKG May 28, 11:45 UTCMay 28, 12:00 UTC15m
2026-05-28 CPA918 MNL → HKG May 28, 10:15 UTCMay 28, 11:15 UTC1h 0m
2026-05-28 CPA919 HKG → MNL May 28, 06:25 UTCMay 28, 08:15 UTC1h 50m
2026-05-28 CPA361 PVG → HKG May 28, 02:45 UTCMay 28, 02:55 UTC10m
2026-05-27 CPA361 PVG → HKG May 27, 14:35 UTCMay 28, 02:00 UTC11h 25m
2026-05-27 CPA362 HKG → PVG May 27, 13:40 UTCMay 27, 13:50 UTC10m
2026-05-27 CPA918 MNL → HKG May 27, 11:35 UTCMay 27, 11:50 UTC15m
2026-05-27 CPA918 MNL → HKG May 27, 10:10 UTCMay 27, 10:50 UTC40m
2026-05-27 CPA919 HKG → MNL May 27, 06:25 UTCMay 27, 08:25 UTC2h 1m
2026-05-26 CPA361 PVG → HKG May 26, 11:54 UTCMay 27, 02:49 UTC14h 55m
2026-05-25 CPA784 DPS → HKG May 25, 12:30 UTCMay 25, 12:55 UTC25m
2026-05-25 CPA785 HKG → DPS May 25, 02:25 UTCMay 25, 10:40 UTC8h 15m
2026-05-24 CPA784 DPS → HKG May 24, 12:50 UTCMay 24, 13:05 UTC15m
2026-05-24 CPA785 HKG → DPS May 24, 02:45 UTCMay 24, 11:05 UTC8h 20m
2026-05-23 CPA974 MNL → HKG May 23, 23:40 UTCMay 23, 23:55 UTC15m
2026-05-23 CPA974 MNL → HKG May 23, 22:20 UTCMay 23, 22:50 UTC30m
2026-05-23 CPA913 HKG → MNL May 23, 13:00 UTCMay 23, 14:35 UTC1h 35m
2026-05-23 CPA543 HND → HKG May 23, 05:55 UTCMay 23, 06:10 UTC15m
2026-05-23 CPA543 HND → HKG May 23, 02:20 UTCMay 23, 05:15 UTC2h 54m
2026-05-22 CPA542 HKG → HND May 22, 09:05 UTCMay 22, 12:35 UTC3h 30m
2026-05-22 CPA930 MNL → HKG May 22, 06:50 UTCMay 22, 07:10 UTC20m
2026-05-22 CPA930 MNL → HKG May 22, 05:30 UTCMay 22, 06:20 UTC50m
2026-05-22 CPA901 HKG → MNL May 22, 01:35 UTCMay 22, 03:30 UTC1h 55m
2026-05-21 CPA507 KIX → HKG May 21, 12:15 UTCMay 21, 12:25 UTC10m
2026-05-21 CPA507 KIX → HKG May 21, 09:10 UTCMay 21, 11:40 UTC2h 30m
2026-05-21 CPA506 HKG → KIX May 21, 02:50 UTCMay 21, 06:00 UTC3h 10m
2026-05-20 CPA784 DPS → HKG May 20, 12:25 UTCMay 20, 12:45 UTC20m
2026-05-20 CPA785 HKG → DPS May 20, 02:40 UTCMay 20, 10:35 UTC7h 56m
2026-05-19 CPA784 DPS → HKG May 19, 12:50 UTCMay 19, 13:05 UTC15m
2026-05-19 CPA784 DPS → HKG May 19, 05:00 UTCMay 19, 10:55 UTC5h 55m
2026-05-19 CPA785 HKG → DPS May 19, 02:55 UTCMay 19, 03:15 UTC20m
2026-05-18 CPA521 NRT → HKG May 18, 12:40 UTCMay 18, 13:00 UTC20m
2026-05-18 CPA521 NRT → HKG May 18, 09:15 UTCMay 18, 12:05 UTC2h 50m
2026-05-18 CPA520 HKG → NRT May 18, 04:05 UTCMay 18, 07:15 UTC3h 10m
2026-05-18 CPA520 HKG → NRT May 18, 03:10 UTCMay 18, 03:25 UTC15m
2026-05-17 CPA979 XMN → HKG May 17, 13:50 UTCMay 17, 14:10 UTC20m
2026-05-17 CPA978 HKG → XMN May 17, 10:25 UTCMay 17, 10:40 UTC15m
2026-05-17 CPA718 CGK → HKG May 17, 05:20 UTCMay 17, 05:40 UTC20m
2026-05-17 CPA718 CGK → HKG May 17, 03:00 UTCMay 17, 03:25 UTC25m
2026-05-17 CPA718 CGK → HKG May 17, 01:15 UTCMay 17, 01:25 UTC10m
2026-05-16 CPA719 HKG → CGK May 16, 08:41 UTCMay 16, 08:51 UTC10m
2026-05-16 CPA973 XMN → HKG May 16, 05:56 UTCMay 16, 06:06 UTC10m
2026-05-16 CPA970 HKG → XMN May 16, 02:10 UTCMay 16, 02:25 UTC15m
2026-05-15 CPA918 MNL → HKG May 15, 11:55 UTCMay 15, 13:40 UTC1h 45m
2026-05-15 CPA919 HKG → MNL May 15, 08:25 UTCMay 15, 10:10 UTC1h 45m
2026-05-14 CPA565 TPE → HKG May 14, 12:50 UTCMay 14, 13:05 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-HNO page for operator, model, and routing details .

Mode-S 7801B7 frequently asked

What is Mode-S code 7801B7?
7801B7 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-HNO.
Where is Mode-S 7801B7 registered?
Mode-S code 7801B7 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7801B7 broadcasting right now?
Yes. Mode-S 7801B7 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7801B7, octal 36000667, decimal 7,864,759.
What flights does 7801B7 operate?
Mode-S 7801B7 has broadcast 20 distinct callsigns, including CPA450, CPA785, CPA784, CPA411, CPA543.