Apparatus

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sensors Mode-S transponder

780AB9

ICAO 24-bit transponder address · allocated to China

Currently assigned to B-LRN · AIRBUS A-350-900

Hex
780AB9
Octal
36005271
Decimal
7,867,065
Country
CN
Tail
B-LRN
Type
A359
Broadcasting now · callsign CPA315 · 7,225 ft
Flights observed
29
Distinct callsigns
6
Country
CN
Last broadcast
11h ago

Current position

780AB9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 780AB9 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 6 distinct

Callsign Airline Flights Last seen
CPA844 Cathay Pacific 8 2026-04-17
CPA841 Cathay Pacific 5 2026-04-18
CPA372 Cathay Pacific 5 2026-04-14
CPA256 Cathay Pacific 4 2026-04-16
CPA239 Cathay Pacific 4 2026-04-15
CPA315 Cathay Pacific 3 2026-04-14

Recent flights last 29

DateFlightRouteTakeoffLandingDuration
2026-04-18 CPA841 JFK → HKG Apr 18, 05:25 UTCApr 18, 05:45 UTC20m
2026-04-18 CPA841 JFK → HKG Apr 18, 05:05 UTCApr 18, 05:20 UTC15m
2026-04-18 CPA841 JFK → HKG Apr 18, 01:00 UTCApr 18, 01:20 UTC20m
2026-04-17 CPA841 JFK → HKG Apr 17, 15:20 UTCApr 17, 15:30 UTC10m
2026-04-17 CPA841 JFK → HKG Apr 17, 14:20 UTCApr 17, 15:15 UTC54m
2026-04-17 CPA844 HKG → JFK Apr 17, 09:20 UTCApr 17, 09:45 UTC25m
2026-04-17 CPA844 HKG → JFK Apr 17, 07:20 UTCApr 17, 09:15 UTC1h 55m
2026-04-17 CPA844 HKG → JFK Apr 17, 05:20 UTCApr 17, 07:15 UTC1h 55m
2026-04-17 CPA844 HKG → JFK Apr 17, 03:20 UTCApr 17, 05:15 UTC1h 56m
2026-04-17 CPA844 HKG → JFK Apr 17, 03:05 UTCApr 17, 03:15 UTC10m
2026-04-16 CPA844 HKG → JFK Apr 16, 21:34 UTCApr 16, 22:24 UTC50m
2026-04-16 CPA844 HKG → JFK Apr 16, 19:20 UTCApr 16, 20:05 UTC45m
2026-04-16 CPA844 HKG → JFK Apr 16, 18:50 UTCApr 16, 19:05 UTC15m
2026-04-16 CPA256 LHR → HKG Apr 16, 07:15 UTCApr 16, 07:54 UTC40m
2026-04-15 CPA256 LHR → HKG Apr 15, 23:10 UTCApr 15, 23:50 UTC40m
2026-04-15 CPA256 LHR → HKG Apr 15, 21:05 UTCApr 15, 23:00 UTC1h 55m
2026-04-15 CPA256 LHR → HKG Apr 15, 19:25 UTCApr 15, 21:00 UTC1h 35m
2026-04-15 CPA239 HKG → LHR Apr 15, 15:05 UTCApr 15, 17:00 UTC1h 55m
2026-04-15 CPA239 HKG → LHR Apr 15, 13:01 UTCApr 15, 14:55 UTC1h 54m
2026-04-15 CPA239 HKG → LHR Apr 15, 11:55 UTCApr 15, 12:55 UTC1h 0m
2026-04-15 CPA239 HKG → LHR Apr 15, 03:15 UTCApr 15, 03:35 UTC20m
2026-04-14 CPA372 MAD → HKG Apr 14, 22:55 UTCApr 14, 23:10 UTC15m
2026-04-14 CPA372 MAD → HKG Apr 14, 22:25 UTCApr 14, 22:50 UTC25m
2026-04-14 CPA372 MAD → HKG Apr 14, 14:50 UTCApr 14, 15:30 UTC40m
2026-04-14 CPA372 MAD → HKG Apr 14, 12:50 UTCApr 14, 14:45 UTC1h 55m
2026-04-14 CPA372 MAD → HKG Apr 14, 10:50 UTCApr 14, 12:45 UTC1h 55m
2026-04-14 CPA315 HKG → MAD Apr 14, 07:10 UTCApr 14, 07:30 UTC20m
2026-04-14 CPA315 HKG → MAD Apr 14, 05:15 UTCApr 14, 07:10 UTC1h 55m
2026-04-13 CPA315 - Apr 13, 17:35 UTCApr 13, 17:55 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-LRN page for operator, model, and routing details .

Mode-S 780AB9 frequently asked

What is Mode-S code 780AB9?
780AB9 is an ICAO 24-bit transponder address. Allocated to China. Assigned to B-LRN.
Where is Mode-S 780AB9 registered?
Mode-S code 780AB9 is allocated to China (CN). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 780AB9 broadcasting right now?
Yes. Mode-S 780AB9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 780AB9, octal 36005271, decimal 7,867,065.
What flights does 780AB9 operate?
Mode-S 780AB9 has broadcast 6 distinct callsigns, including CPA844, CPA841, CPA372, CPA256, CPA239.