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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 CPA411 · 36,000 ft
Flights observed
358
Distinct callsigns
20
Country
CN
Last broadcast
1h 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
CPA718 - 21 2026-07-12
CPA784 - 20 2026-07-13
CPA411 - 19 2026-07-14
CPA785 - 18 2026-07-13
CPA719 - 17 2026-07-11
CPA543 - 14 2026-06-20
CPA450 - 13 2026-07-08
CPA410 - 13 2026-07-14
CPA798 - 12 2026-07-07
CPA542 - 11 2026-06-19
CPA565 - 10 2026-06-16
CPA303 - 10 2026-06-19
CPA521 - 9 2026-06-25
CPA520 - 9 2026-06-25
CPA507 - 9 2026-06-24
CPA505 - 9 2026-07-08
CPA918 - 8 2026-06-29
CPA797 - 8 2026-07-07
CPA451 - 8 2026-07-09
CPA362 - 8 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CPA411 - Jul 14, 07:10 UTCJul 14, 07:45 UTC35m
2026-07-14 CPA410 HKG → ICN Jul 14, 02:25 UTCJul 14, 05:30 UTC3h 5m
2026-07-13 CPA784 - Jul 13, 12:40 UTCJul 13, 12:55 UTC15m
2026-07-13 CPA785 - Jul 13, 04:35 UTCJul 13, 10:45 UTC6h 10m
2026-07-13 CPA785 - Jul 13, 02:30 UTCJul 13, 02:50 UTC20m
2026-07-12 CPA459 KHH → HKG Jul 12, 11:35 UTCJul 12, 12:40 UTC1h 5m
2026-07-12 CPA458 HKG → KHH Jul 12, 08:50 UTCJul 12, 09:50 UTC1h 0m
2026-07-12 CPA718 - Jul 12, 05:25 UTCJul 12, 05:50 UTC25m
2026-07-12 CPA718 - Jul 12, 01:25 UTCJul 12, 02:45 UTC1h 20m
2026-07-11 CPA719 - Jul 11, 12:00 UTCJul 11, 12:20 UTC20m
2026-07-11 CPA719 - Jul 11, 08:05 UTCJul 11, 08:20 UTC15m
2026-07-10 CPA362 HKG → HKG Jul 10, 12:05 UTCJul 11, 02:40 UTC14h 35m
2026-07-10 CPA411 - Jul 10, 07:20 UTCJul 10, 10:15 UTC2h 55m
2026-07-10 CPA410 HKG → ICN Jul 10, 02:40 UTCJul 10, 05:45 UTC3h 5m
2026-07-09 CPA451 - Jul 9, 11:50 UTCJul 9, 13:10 UTC1h 20m
2026-07-09 CPA451 NRT → TPE Jul 9, 07:10 UTCJul 9, 10:20 UTC3h 10m
2026-07-09 CPA504 HKG → NRT Jul 9, 01:30 UTCJul 9, 05:25 UTC3h 55m
2026-07-08 CPA505 NRT → HKG Jul 8, 10:15 UTCJul 8, 14:05 UTC3h 50m
2026-07-08 CPA450 TPE → NRT Jul 8, 05:05 UTCJul 8, 08:00 UTC2h 55m
2026-07-08 CPA450 HKG → TPE Jul 8, 02:25 UTCJul 8, 03:45 UTC1h 20m
2026-07-07 CPA798 - Jul 7, 22:00 UTCJul 7, 22:15 UTC15m
2026-07-07 CPA798 - Jul 7, 19:45 UTCJul 7, 20:15 UTC30m
2026-07-07 CPA797 - Jul 7, 16:00 UTCJul 7, 16:15 UTC15m
2026-07-07 CPA797 - Jul 7, 12:15 UTCJul 7, 12:30 UTC15m
2026-07-07 CPA973 - Jul 7, 07:25 UTCJul 7, 07:45 UTC20m
2026-07-07 CPA970 - Jul 7, 03:45 UTCJul 7, 04:00 UTC15m
2026-07-06 CPA784 - Jul 6, 12:40 UTCJul 6, 13:00 UTC20m
2026-07-06 CPA785 - Jul 6, 02:20 UTCJul 6, 10:45 UTC8h 25m
2026-07-05 CPA451 TPE → HKG Jul 5, 11:50 UTCJul 5, 13:00 UTC1h 10m
2026-07-05 CPA451 NRT → TPE Jul 5, 07:10 UTCJul 5, 10:15 UTC3h 5m
2026-07-05 CPA504 - Jul 5, 02:10 UTCJul 5, 05:10 UTC3h 0m
2026-07-05 CPA504 - Jul 5, 01:15 UTCJul 5, 01:35 UTC20m
2026-07-04 CPA451 - Jul 4, 14:05 UTCJul 4, 14:25 UTC20m
2026-07-04 CPA451 - Jul 4, 13:05 UTCJul 4, 13:25 UTC20m
2026-07-04 CPA451 - Jul 4, 10:00 UTCJul 4, 10:15 UTC15m
2026-07-04 CPA451 - Jul 4, 07:20 UTCJul 4, 08:40 UTC1h 20m
2026-07-04 CPA504 - Jul 4, 02:40 UTCJul 4, 05:40 UTC3h 0m
2026-07-04 CPA504 - Jul 4, 01:50 UTCJul 4, 02:05 UTC15m
2026-07-03 CPA798 - Jul 3, 22:50 UTCJul 3, 23:05 UTC15m
2026-07-03 CPA798 - Jul 3, 18:45 UTCJul 3, 20:00 UTC1h 15m
2026-07-03 CPA797 - Jul 3, 16:40 UTCJul 3, 16:55 UTC15m
2026-07-03 CPA797 - Jul 3, 14:40 UTCJul 3, 15:20 UTC40m
2026-07-03 CPA797 - Jul 3, 12:45 UTCJul 3, 13:00 UTC15m
2026-07-03 CPA767 - Jul 3, 02:50 UTCJul 3, 03:05 UTC15m
2026-07-02 CPA784 - Jul 2, 12:25 UTCJul 2, 12:45 UTC20m
2026-07-02 CPA784 - Jul 2, 04:50 UTCJul 2, 10:40 UTC5h 50m
2026-07-02 CPA785 - Jul 2, 02:40 UTCJul 2, 03:00 UTC20m
2026-06-30 CPA784 - Jun 30, 12:50 UTCJun 30, 13:05 UTC15m
2026-06-30 CPA784 - Jun 30, 04:20 UTCJun 30, 10:50 UTC6h 30m
2026-06-30 CPA785 - Jun 30, 02:30 UTCJun 30, 02:50 UTC20m

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 CPA718, CPA784, CPA411, CPA785, CPA719.