sensors Mode-S transponder
780A2A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-KPY · BOEING 777-300ER
- Hex
- 780A2A
- Octal
- 36005052
- Decimal
- 7,866,922
- Country
- CN
- Tail
- B-KPY
- Type
- B77W
- Flights observed
- 155
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2h ago
Current position
Country allocation
The ICAO 24-bit address 780A2A 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 |
|---|---|---|---|
| CPA663 | Cathay Pacific | 18 | 2026-05-29 |
| CPA870 | Cathay Pacific | 13 | 2026-05-28 |
| CPA660 | Cathay Pacific | 12 | 2026-05-29 |
| CPA879 | Cathay Pacific | 11 | 2026-05-28 |
| CPA665 | Cathay Pacific | 10 | 2026-05-10 |
| CPA698 | Cathay Pacific | 8 | 2026-05-10 |
| CPA885 | Cathay Pacific | 6 | 2026-04-26 |
| CPA683 | Cathay Pacific | 6 | 2026-05-16 |
| CPA259 | Cathay Pacific | 6 | 2026-05-20 |
| CPA216 | Cathay Pacific | 5 | 2026-05-20 |
| CPA884 | Cathay Pacific | 4 | 2026-04-26 |
| CPA815 | Cathay Pacific | 4 | 2026-05-16 |
| CPA741 | Cathay Pacific | 4 | 2026-05-21 |
| CPA740 | Cathay Pacific | 4 | 2026-05-21 |
| CPA696 | Cathay Pacific | 4 | 2026-05-16 |
| CPA679 | Cathay Pacific | 4 | 2026-05-17 |
| CPA742 | Cathay Pacific | 3 | 2026-05-23 |
| CPA694 | Cathay Pacific | 3 | 2026-05-17 |
| CPA319 | Cathay Pacific | 3 | 2026-05-01 |
| CPA883 | Cathay Pacific | 2 | 2026-05-27 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CPA660 | BOM → HKG | May 29, 22:05 UTC | May 29, 23:00 UTC | 55m |
| 2026-05-29 | CPA660 | BOM → HKG | May 29, 20:45 UTC | May 29, 20:55 UTC | 10m |
| 2026-05-29 | CPA663 | HKG → BOM | May 29, 18:35 UTC | May 29, 18:50 UTC | 15m |
| 2026-05-29 | CPA663 | HKG → BOM | May 29, 14:00 UTC | May 29, 17:00 UTC | 3h 0m |
| 2026-05-29 | CPA663 | HKG → BOM | May 29, 13:20 UTC | May 29, 13:30 UTC | 10m |
| 2026-05-28 | CPA879 | SFO → HKG | May 28, 20:50 UTC | May 29, 10:45 UTC | 13h 55m |
| 2026-05-28 | CPA870 | HKG → SFO | May 28, 05:50 UTC | May 28, 18:00 UTC | 12h 10m |
| 2026-05-27 | CPA883 | LAX → HKG | May 27, 06:49 UTC | May 27, 21:05 UTC | 14h 15m |
| 2026-05-26 | CPA882 | HKG → LAX | May 26, 12:05 UTC | May 27, 00:34 UTC | 12h 30m |
| 2026-05-25 | CPA660 | BOM → HKG | May 25, 22:25 UTC | May 26, 02:19 UTC | 3h 55m |
| 2026-05-25 | CPA660 | BOM → HKG | May 25, 20:55 UTC | May 25, 21:04 UTC | 10m |
| 2026-05-25 | CPA663 | HKG → BOM | May 25, 18:15 UTC | May 25, 18:40 UTC | 25m |
| 2026-05-25 | CPA663 | HKG → BOM | May 25, 15:20 UTC | May 25, 15:40 UTC | 20m |
| 2026-05-25 | CPA663 | HKG → BOM | May 25, 13:00 UTC | May 25, 13:15 UTC | 15m |
| 2026-05-24 | CPA879 | SFO → HKG | May 24, 20:45 UTC | May 25, 10:50 UTC | 14h 5m |
| 2026-05-24 | CPA870 | HKG → SFO | May 24, 06:05 UTC | May 24, 18:05 UTC | 12h 0m |
| 2026-05-23 | CPA742 | RUH → HKG | May 23, 09:10 UTC | May 23, 14:05 UTC | 4h 55m |
| 2026-05-23 | CPA477 | TPE → HKG | May 23, 03:45 UTC | May 23, 04:05 UTC | 20m |
| 2026-05-23 | CPA477 | TPE → HKG | May 23, 02:40 UTC | May 23, 03:10 UTC | 30m |
| 2026-05-22 | CPA422 | HKG → TPE | May 22, 23:50 UTC | May 23, 01:10 UTC | 1h 20m |
| 2026-05-22 | CPA883 | LAX → HKG | May 22, 06:55 UTC | May 22, 22:00 UTC | 15h 5m |
| 2026-05-21 | CPA882 | HKG → LAX | May 21, 10:45 UTC | May 21, 22:50 UTC | 12h 5m |
| 2026-05-21 | CPA740 | HAN → HKG | May 21, 06:05 UTC | May 21, 06:35 UTC | 30m |
| 2026-05-21 | CPA741 | HKG → HAN | May 21, 01:50 UTC | May 21, 02:00 UTC | 10m |
| 2026-05-20 | CPA216 | MAN → HKG | May 20, 22:20 UTC | May 20, 22:45 UTC | 25m |
| 2026-05-20 | CPA216 | MAN → HKG | May 20, 10:35 UTC | May 20, 15:20 UTC | 4h 45m |
| 2026-05-20 | CPA259 | HKG → MAN | May 20, 02:30 UTC | May 20, 07:30 UTC | 5h 1m |
| 2026-05-19 | CPA259 | HKG → MAN | May 19, 17:45 UTC | May 19, 18:05 UTC | 20m |
| 2026-05-18 | CPA879 | SFO → HKG | May 18, 20:40 UTC | May 19, 10:50 UTC | 14h 10m |
| 2026-05-18 | CPA870 | HKG → SFO | May 18, 06:35 UTC | May 18, 17:50 UTC | 11h 15m |
| 2026-05-18 | CPA870 | HKG → SFO | May 18, 05:45 UTC | May 18, 06:01 UTC | 15m |
| 2026-05-17 | CPA694 | DEL → HKG | May 17, 20:10 UTC | May 18, 00:35 UTC | 4h 25m |
| 2026-05-17 | CPA679 | HKG → DEL | May 17, 15:31 UTC | May 17, 17:40 UTC | 2h 10m |
| 2026-05-17 | CPA679 | HKG → DEL | May 17, 12:35 UTC | May 17, 12:45 UTC | 10m |
| 2026-05-17 | CPA740 | HAN → HKG | May 17, 05:10 UTC | May 17, 05:45 UTC | 35m |
| 2026-05-17 | CPA741 | HKG → HAN | May 17, 01:15 UTC | May 17, 01:30 UTC | 15m |
| 2026-05-16 | CPA696 | BOM → HKG | May 16, 19:10 UTC | May 16, 22:45 UTC | 3h 35m |
| 2026-05-16 | CPA696 | BOM → HKG | May 16, 17:30 UTC | May 16, 17:40 UTC | 10m |
| 2026-05-16 | CPA683 | HKG → BOM | May 16, 15:20 UTC | May 16, 15:35 UTC | 15m |
| 2026-05-16 | CPA683 | HKG → BOM | May 16, 11:35 UTC | May 16, 14:25 UTC | 2h 50m |
| 2026-05-16 | CPA683 | HKG → BOM | May 16, 09:56 UTC | May 16, 10:11 UTC | 15m |
| 2026-05-16 | CPA815 | YVR → HKG | May 16, 06:01 UTC | May 16, 06:16 UTC | 15m |
| 2026-05-15 | CPA815 | YVR → HKG | May 15, 17:40 UTC | May 16, 05:25 UTC | 11h 45m |
| 2026-05-15 | CPA814 | HKG → YVR | May 15, 04:45 UTC | May 15, 15:35 UTC | 10h 49m |
| 2026-05-14 | CPA879 | SFO → HKG | May 14, 10:20 UTC | May 14, 10:40 UTC | 20m |
| 2026-05-13 | CPA879 | SFO → HKG | May 13, 20:40 UTC | May 14, 09:40 UTC | 13h 0m |
| 2026-05-13 | CPA870 | HKG → SFO | May 13, 06:40 UTC | May 13, 17:50 UTC | 11h 10m |
| 2026-05-13 | CPA870 | HKG → SFO | May 13, 05:55 UTC | May 13, 06:10 UTC | 15m |
| 2026-05-12 | CPA742 | RUH → HKG | May 12, 13:10 UTC | May 12, 13:35 UTC | 25m |
| 2026-05-12 | CPA743 | HKG → BAH | May 12, 09:10 UTC | May 12, 09:25 UTC | 15m |
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-KPY page for operator, model, and routing details .