sensors Mode-S transponder
789231
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-LXK · AIRBUS A-350-1000
- Hex
- 789231
- Octal
- 36111061
- Decimal
- 7,901,745
- Country
- CN
- Tail
- B-LXK
- Type
- A35K
- Flights observed
- 100
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address 789231 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 |
|---|---|---|---|
| CPA820 | Cathay Pacific | 9 | 2026-05-03 |
| CPA843 | Cathay Pacific | 7 | 2026-05-15 |
| CPA828 | Cathay Pacific | 7 | 2026-05-22 |
| CPA805 | Cathay Pacific | 7 | 2026-05-23 |
| CPA271 | Cathay Pacific | 7 | 2026-05-07 |
| CPA257 | Cathay Pacific | 7 | 2026-05-16 |
| CPA840 | Cathay Pacific | 6 | 2026-05-29 |
| CPA270 | Cathay Pacific | 6 | 2026-05-08 |
| CPA238 | Cathay Pacific | 6 | 2026-05-17 |
| CPA595 | Cathay Pacific | 5 | 2026-05-01 |
| CPA876 | Cathay Pacific | 4 | 2026-05-25 |
| CPA829 | Cathay Pacific | 4 | 2026-05-28 |
| CPA596 | Cathay Pacific | 4 | 2026-05-07 |
| CPA261 | Cathay Pacific | 4 | 2026-05-20 |
| CPA875 | Cathay Pacific | 3 | 2026-05-26 |
| CPA826 | Cathay Pacific | 3 | 2026-05-27 |
| CPA821 | Cathay Pacific | 3 | 2026-05-04 |
| CPA260 | Cathay Pacific | 3 | 2026-05-21 |
| CPA431 | Cathay Pacific | 2 | 2026-05-25 |
| CPA812 | Cathay Pacific | 1 | 2026-05-23 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CPA840 | HKG → JFK | May 29, 09:00 UTC | May 30, 00:10 UTC | 15h 10m |
| 2026-05-28 | CPA829 | YYZ → HKG | May 28, 06:15 UTC | May 28, 21:10 UTC | 14h 55m |
| 2026-05-27 | CPA826 | HKG → YYZ | May 27, 11:35 UTC | May 28, 02:00 UTC | 14h 25m |
| 2026-05-26 | CPA875 | DFW → HKG | May 26, 04:45 UTC | May 26, 20:24 UTC | 15h 40m |
| 2026-05-25 | CPA876 | HKG → DFW | May 25, 08:35 UTC | May 25, 23:40 UTC | 15h 5m |
| 2026-05-25 | CPA431 | KHH → HKG | May 25, 04:50 UTC | May 25, 05:05 UTC | 15m |
| 2026-05-25 | CPA431 | KHH → HKG | May 25, 04:00 UTC | May 25, 04:15 UTC | 15m |
| 2026-05-24 | CPA432 | HKG → KHH | May 24, 08:20 UTC | May 25, 02:20 UTC | 18h 0m |
| 2026-05-24 | CPA811 | BOS → HKG | May 24, 07:20 UTC | May 25, 02:20 UTC | 19h 0m |
| 2026-05-23 | CPA812 | HKG → BOS | May 23, 13:25 UTC | May 24, 04:25 UTC | 15h 0m |
| 2026-05-23 | CPA805 | YYZ → HKG | May 23, 10:35 UTC | May 23, 11:05 UTC | 30m |
| 2026-05-22 | CPA805 | YYZ → HKG | May 22, 20:15 UTC | May 22, 23:50 UTC | 3h 35m |
| 2026-05-22 | CPA828 | HKG → YYZ | May 22, 03:15 UTC | May 22, 17:25 UTC | 14h 10m |
| 2026-05-21 | CPA260 | CDG → HKG | May 21, 10:45 UTC | May 21, 22:30 UTC | 11h 45m |
| 2026-05-20 | CPA261 | HKG → CDG | May 20, 22:10 UTC | May 21, 06:00 UTC | 7h 50m |
| 2026-05-20 | CPA261 | HKG → CDG | May 20, 16:55 UTC | May 20, 17:15 UTC | 20m |
| 2026-05-19 | CPA805 | YYZ → HKG | May 19, 20:20 UTC | May 20, 11:05 UTC | 14h 46m |
| 2026-05-19 | CPA828 | HKG → YYZ | May 19, 03:40 UTC | May 19, 17:50 UTC | 14h 10m |
| 2026-05-18 | CPA829 | YYZ → HKG | May 18, 06:20 UTC | May 18, 20:55 UTC | 14h 34m |
| 2026-05-17 | CPA826 | HKG → YYZ | May 17, 12:30 UTC | May 18, 02:45 UTC | 14h 15m |
| 2026-05-17 | CPA238 | LHR → HKG | May 17, 04:20 UTC | May 17, 04:45 UTC | 25m |
| 2026-05-16 | CPA238 | LHR → HKG | May 16, 16:55 UTC | May 16, 22:00 UTC | 5h 5m |
| 2026-05-16 | CPA257 | HKG → LHR | May 16, 06:01 UTC | May 16, 14:16 UTC | 8h 15m |
| 2026-05-16 | CPA257 | HKG → LHR | May 16, 00:40 UTC | May 16, 01:00 UTC | 20m |
| 2026-05-15 | CPA843 | JFK → HKG | May 15, 06:25 UTC | May 15, 21:30 UTC | 15h 4m |
| 2026-05-14 | CPA840 | HKG → JFK | May 14, 09:10 UTC | May 15, 00:00 UTC | 14h 50m |
| 2026-05-13 | CPA843 | JFK → HKG | May 13, 06:10 UTC | May 13, 21:10 UTC | 15h 0m |
| 2026-05-12 | CPA840 | HKG → JFK | May 12, 09:05 UTC | May 13, 00:10 UTC | 15h 5m |
| 2026-05-12 | CPA238 | LHR → HKG | May 12, 04:20 UTC | May 12, 05:00 UTC | 40m |
| 2026-05-11 | CPA238 | LHR → HKG | May 11, 17:00 UTC | May 11, 21:55 UTC | 4h 55m |
| 2026-05-11 | CPA257 | HKG → LHR | May 11, 12:50 UTC | May 11, 14:35 UTC | 1h 45m |
| 2026-05-11 | CPA257 | HKG → LHR | May 11, 09:20 UTC | May 11, 12:45 UTC | 3h 25m |
| 2026-05-11 | CPA257 | HKG → LHR | May 11, 00:54 UTC | May 11, 01:10 UTC | 15m |
| 2026-05-10 | CPA875 | DFW → HKG | May 10, 04:04 UTC | May 10, 20:00 UTC | 15h 55m |
| 2026-05-09 | CPA876 | HKG → DFW | May 9, 08:35 UTC | May 9, 22:15 UTC | 13h 40m |
| 2026-05-08 | CPA270 | AMS → HKG | May 8, 11:09 UTC | May 8, 22:40 UTC | 11h 30m |
| 2026-05-07 | CPA271 | HKG → AMS | May 7, 21:00 UTC | May 8, 05:00 UTC | 7h 59m |
| 2026-05-07 | CPA271 | HKG → AMS | May 7, 15:55 UTC | May 7, 16:10 UTC | 15m |
| 2026-05-07 | CPA596 | HKG → KIX | May 7, 01:20 UTC | May 7, 13:15 UTC | 11h 55m |
| 2026-05-06 | CPA843 | JFK → HKG | May 6, 07:05 UTC | May 6, 21:55 UTC | 14h 49m |
| 2026-05-05 | CPA840 | HKG → JFK | May 5, 09:40 UTC | May 6, 00:25 UTC | 14h 45m |
| 2026-05-04 | CPA821 | YYZ → HKG | May 4, 14:40 UTC | May 5, 05:10 UTC | 14h 31m |
| 2026-05-03 | CPA820 | HKG → YYZ | May 3, 19:55 UTC | May 4, 09:50 UTC | 13h 55m |
| 2026-05-02 | CPA821 | YYZ → HKG | May 2, 15:00 UTC | May 3, 05:40 UTC | 14h 39m |
| 2026-05-01 | CPA820 | HKG → YYZ | May 1, 19:40 UTC | May 2, 09:55 UTC | 14h 15m |
| 2026-05-01 | CPA595 | KIX → HKG | May 1, 13:10 UTC | May 1, 13:30 UTC | 20m |
| 2026-05-01 | CPA595 | KIX → HKG | May 1, 10:15 UTC | May 1, 12:35 UTC | 2h 20m |
| 2026-05-01 | CPA596 | HKG → KIX | May 1, 01:00 UTC | May 1, 03:55 UTC | 2h 55m |
| 2026-04-29 | CPA829 | YYZ → HKG | Apr 29, 19:55 UTC | Apr 29, 20:20 UTC | 25m |
| 2026-04-29 | CPA829 | YYZ → HKG | Apr 29, 06:00 UTC | Apr 29, 17:50 UTC | 11h 51m |
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-LXK page for operator, model, and routing details .