sensors Mode-S transponder
780A18
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-KPW · BOEING 777-300ER
- Hex
- 780A18
- Octal
- 36005030
- Decimal
- 7,866,904
- Country
- CN
- Tail
- B-KPW
- Type
- B77W
- Flights observed
- 99
- Distinct callsigns
- 16
- Country
- CN
- Last broadcast
- 17h ago
Last known position
Country allocation
The ICAO 24-bit address 780A18 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 16 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CPA251 | Cathay Pacific | 12 | 2026-05-28 |
| CPA252 | Cathay Pacific | 11 | 2026-05-29 |
| CPA881 | Cathay Pacific | 10 | 2026-05-27 |
| CPA831 | Cathay Pacific | 10 | 2026-05-25 |
| CPA253 | Cathay Pacific | 10 | 2026-05-20 |
| CPA880 | Cathay Pacific | 8 | 2026-05-26 |
| CPA830 | Cathay Pacific | 8 | 2026-05-25 |
| CPA390 | Cathay Pacific | 7 | 2026-05-28 |
| CPA254 | Cathay Pacific | 6 | 2026-05-21 |
| CPA391 | Cathay Pacific | 5 | 2026-05-28 |
| CPA234 | Cathay Pacific | 4 | 2026-05-01 |
| CPA233 | Cathay Pacific | 3 | 2026-04-30 |
| CPA423 | Cathay Pacific | 2 | 2026-05-06 |
| CPA432 | Cathay Pacific | 1 | 2026-04-15 |
| CPA431 | Cathay Pacific | 1 | 2026-04-15 |
| CPA424 | Cathay Pacific | 1 | 2026-05-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CPA252 | LHR → HKG | May 29, 23:30 UTC | May 29, 23:55 UTC | 25m |
| 2026-05-29 | CPA252 | LHR → HKG | May 29, 12:10 UTC | May 29, 16:30 UTC | 4h 20m |
| 2026-05-28 | CPA251 | HKG → LHR | May 28, 23:50 UTC | May 29, 05:00 UTC | 5h 10m |
| 2026-05-28 | CPA251 | HKG → LHR | May 28, 15:05 UTC | May 28, 15:25 UTC | 20m |
| 2026-05-28 | CPA391 | PEK → HKG | May 28, 06:05 UTC | May 28, 09:05 UTC | 3h 0m |
| 2026-05-28 | CPA390 | HKG → PEK | May 28, 01:30 UTC | May 28, 01:45 UTC | 15m |
| 2026-05-27 | CPA881 | LAX → HKG | May 27, 07:30 UTC | May 27, 21:50 UTC | 14h 20m |
| 2026-05-26 | CPA880 | HKG → LAX | May 26, 16:15 UTC | May 27, 04:55 UTC | 12h 40m |
| 2026-05-25 | CPA831 | JFK → HKG | May 25, 19:25 UTC | May 26, 10:44 UTC | 15h 20m |
| 2026-05-25 | CPA830 | HKG → JFK | May 25, 01:55 UTC | May 25, 17:20 UTC | 15h 25m |
| 2026-05-23 | CPA831 | JFK → HKG | May 23, 19:15 UTC | May 24, 10:40 UTC | 15h 25m |
| 2026-05-23 | CPA830 | HKG → JFK | May 23, 01:25 UTC | May 23, 16:25 UTC | 14h 59m |
| 2026-05-22 | CPA881 | LAX → HKG | May 22, 22:20 UTC | May 22, 22:30 UTC | 10m |
| 2026-05-22 | CPA881 | LAX → HKG | May 22, 07:50 UTC | May 22, 21:45 UTC | 13h 55m |
| 2026-05-21 | CPA880 | HKG → LAX | May 21, 16:15 UTC | May 22, 04:25 UTC | 12h 10m |
| 2026-05-21 | CPA254 | LHR → HKG | May 21, 10:10 UTC | May 21, 10:40 UTC | 30m |
| 2026-05-20 | CPA254 | LHR → HKG | May 20, 22:25 UTC | May 21, 03:00 UTC | 4h 35m |
| 2026-05-20 | CPA253 | HKG → LHR | May 20, 15:20 UTC | May 20, 20:40 UTC | 5h 20m |
| 2026-05-20 | CPA253 | HKG → LHR | May 20, 07:35 UTC | May 20, 07:55 UTC | 20m |
| 2026-05-19 | CPA881 | LAX → HKG | May 19, 07:45 UTC | May 19, 22:30 UTC | 14h 45m |
| 2026-05-18 | CPA880 | HKG → LAX | May 18, 16:25 UTC | May 19, 05:00 UTC | 12h 34m |
| 2026-05-17 | CPA831 | JFK → HKG | May 17, 19:15 UTC | May 18, 11:00 UTC | 15h 45m |
| 2026-05-17 | CPA830 | HKG → JFK | May 17, 01:35 UTC | May 17, 16:50 UTC | 15h 15m |
| 2026-05-16 | CPA881 | LAX → HKG | May 16, 21:55 UTC | May 16, 22:20 UTC | 25m |
| 2026-05-16 | CPA881 | LAX → HKG | May 16, 07:41 UTC | May 16, 21:25 UTC | 13h 45m |
| 2026-05-15 | CPA880 | HKG → LAX | May 15, 16:45 UTC | May 16, 05:05 UTC | 12h 20m |
| 2026-05-14 | CPA254 | LHR → HKG | May 14, 22:55 UTC | May 15, 11:05 UTC | 12h 10m |
| 2026-05-14 | CPA253 | HKG → LHR | May 14, 11:15 UTC | May 14, 19:50 UTC | 8h 35m |
| 2026-05-14 | CPA253 | HKG → LHR | May 14, 05:50 UTC | May 14, 06:05 UTC | 15m |
| 2026-05-14 | CPA252 | LHR → HKG | May 14, 00:10 UTC | May 14, 00:50 UTC | 40m |
| 2026-05-13 | CPA252 | LHR → HKG | May 13, 12:40 UTC | May 13, 15:30 UTC | 2h 50m |
| 2026-05-13 | CPA251 | HKG → LHR | May 13, 00:30 UTC | May 13, 05:40 UTC | 5h 10m |
| 2026-05-12 | CPA251 | HKG → LHR | May 12, 15:55 UTC | May 12, 16:15 UTC | 20m |
| 2026-05-11 | CPA831 | JFK → HKG | May 11, 19:05 UTC | May 12, 10:30 UTC | 15h 25m |
| 2026-05-11 | CPA830 | HKG → JFK | May 11, 02:25 UTC | May 11, 16:05 UTC | 13h 40m |
| 2026-05-11 | CPA830 | HKG → JFK | May 11, 01:34 UTC | May 11, 01:50 UTC | 15m |
| 2026-05-10 | CPA390 | HKG → PEK | May 10, 01:30 UTC | May 10, 09:05 UTC | 7h 35m |
| 2026-05-08 | CPA254 | LHR → HKG | May 8, 21:50 UTC | May 9, 09:50 UTC | 12h 0m |
| 2026-05-08 | CPA253 | HKG → LHR | May 8, 14:25 UTC | May 8, 19:30 UTC | 5h 5m |
| 2026-05-08 | CPA253 | HKG → LHR | May 8, 05:44 UTC | May 8, 05:59 UTC | 15m |
| 2026-05-07 | CPA252 | LHR → HKG | May 7, 12:10 UTC | May 8, 00:05 UTC | 11h 55m |
| 2026-05-07 | CPA251 | HKG → LHR | May 7, 00:05 UTC | May 7, 04:55 UTC | 4h 50m |
| 2026-05-06 | CPA251 | HKG → LHR | May 6, 15:20 UTC | May 6, 15:35 UTC | 15m |
| 2026-05-06 | CPA423 | KHH → HKG | May 6, 06:35 UTC | May 6, 06:55 UTC | 20m |
| 2026-05-06 | CPA423 | KHH → HKG | May 6, 05:45 UTC | May 6, 06:05 UTC | 20m |
| 2026-05-06 | CPA424 | HKG → KHH | May 6, 03:15 UTC | May 6, 04:15 UTC | 1h 0m |
| 2026-05-05 | CPA881 | LAX → HKG | May 5, 07:35 UTC | May 5, 22:25 UTC | 14h 50m |
| 2026-05-04 | CPA880 | HKG → LAX | May 4, 16:30 UTC | May 5, 04:35 UTC | 12h 6m |
| 2026-05-01 | CPA234 | MXP → HKG | May 1, 11:05 UTC | May 1, 22:25 UTC | 11h 20m |
| 2026-04-30 | CPA233 | HKG → MXP | Apr 30, 17:05 UTC | May 1, 05:45 UTC | 12h 40m |
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-KPW page for operator, model, and routing details .