sensors Mode-S transponder
78921A
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-LXH · AIRBUS A-350-1000
- Hex
- 78921A
- Octal
- 36111032
- Decimal
- 7,901,722
- Country
- CN
- Tail
- B-LXH
- Type
- A35K
- Flights observed
- 177
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 33m ago
Current position
Country allocation
The ICAO 24-bit address 78921A 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 |
|---|---|---|---|
| CPA826 | - | 21 | 2026-06-14 |
| CPA257 | - | 18 | 2026-07-11 |
| CPA238 | - | 17 | 2026-07-12 |
| CPA806 | - | 14 | 2026-07-08 |
| CPA801 | - | 13 | 2026-07-08 |
| CPA875 | - | 11 | 2026-07-13 |
| CPA271 | - | 11 | 2026-07-07 |
| CPA261 | - | 10 | 2026-07-10 |
| CPA829 | - | 8 | 2026-06-15 |
| CPA270 | - | 8 | 2026-07-07 |
| CPA876 | - | 7 | 2026-07-12 |
| CPA828 | - | 7 | 2026-07-14 |
| CPA595 | Cathay Pacific | 7 | 2026-05-24 |
| CPA260 | - | 5 | 2026-07-10 |
| CPA843 | Cathay Pacific | 4 | 2026-05-23 |
| CPA840 | Cathay Pacific | 4 | 2026-05-22 |
| CPA596 | Cathay Pacific | 4 | 2026-05-24 |
| CPA805 | - | 3 | 2026-07-05 |
| CPA812 | Cathay Pacific | 2 | 2026-05-12 |
| CPA811 | Cathay Pacific | 2 | 2026-05-13 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | CPA828 | - | Jul 14, 03:45 UTC | Jul 14, 04:30 UTC | 45m |
| 2026-07-13 | CPA875 | DFW → HKG | Jul 13, 04:25 UTC | Jul 13, 19:35 UTC | 15h 10m |
| 2026-07-12 | CPA876 | HKG → DFW | Jul 12, 08:30 UTC | Jul 12, 23:50 UTC | 15h 20m |
| 2026-07-12 | CPA238 | - | Jul 12, 03:20 UTC | Jul 12, 03:55 UTC | 35m |
| 2026-07-11 | CPA238 | - | Jul 11, 16:25 UTC | Jul 11, 19:25 UTC | 3h 0m |
| 2026-07-11 | CPA257 | - | Jul 11, 12:00 UTC | Jul 11, 14:00 UTC | 2h 0m |
| 2026-07-11 | CPA257 | - | Jul 11, 00:35 UTC | Jul 11, 00:55 UTC | 20m |
| 2026-07-10 | CPA260 | - | Jul 10, 10:40 UTC | Jul 10, 21:30 UTC | 10h 50m |
| 2026-07-10 | CPA261 | - | Jul 10, 03:50 UTC | Jul 10, 06:05 UTC | 2h 15m |
| 2026-07-09 | CPA261 | - | Jul 9, 17:05 UTC | Jul 9, 17:25 UTC | 20m |
| 2026-07-08 | CPA801 | - | Jul 8, 21:45 UTC | Jul 9, 14:00 UTC | 16h 15m |
| 2026-07-08 | CPA806 | HKG → ORD | Jul 8, 04:25 UTC | Jul 8, 18:30 UTC | 14h 5m |
| 2026-07-07 | CPA270 | - | Jul 7, 21:15 UTC | Jul 7, 21:45 UTC | 30m |
| 2026-07-07 | CPA270 | - | Jul 7, 10:45 UTC | Jul 7, 13:20 UTC | 2h 35m |
| 2026-07-07 | CPA271 | - | Jul 7, 02:55 UTC | Jul 7, 05:00 UTC | 2h 5m |
| 2026-07-06 | CPA271 | - | Jul 6, 15:40 UTC | Jul 6, 16:00 UTC | 20m |
| 2026-07-05 | CPA805 | - | Jul 5, 20:15 UTC | Jul 6, 11:15 UTC | 15h 0m |
| 2026-07-05 | CPA828 | - | Jul 5, 04:25 UTC | Jul 5, 17:55 UTC | 13h 30m |
| 2026-07-05 | CPA828 | - | Jul 5, 03:35 UTC | Jul 5, 03:50 UTC | 15m |
| 2026-07-03 | CPA801 | - | Jul 3, 22:25 UTC | Jul 4, 13:05 UTC | 14h 40m |
| 2026-07-03 | CPA806 | - | Jul 3, 05:40 UTC | Jul 3, 19:40 UTC | 14h 0m |
| 2026-07-03 | CPA806 | - | Jul 3, 04:50 UTC | Jul 3, 05:05 UTC | 15m |
| 2026-07-02 | CPA801 | - | Jul 2, 14:25 UTC | Jul 2, 14:55 UTC | 30m |
| 2026-07-02 | CPA801 | - | Jul 2, 00:20 UTC | Jul 2, 12:20 UTC | 12h 0m |
| 2026-07-01 | CPA806 | - | Jul 1, 08:25 UTC | Jul 1, 21:40 UTC | 13h 15m |
| 2026-07-01 | CPA806 | - | Jul 1, 07:30 UTC | Jul 1, 07:50 UTC | 20m |
| 2026-07-01 | CPA238 | - | Jul 1, 04:05 UTC | Jul 1, 04:25 UTC | 20m |
| 2026-06-30 | CPA238 | - | Jun 30, 17:00 UTC | Jun 30, 20:05 UTC | 3h 5m |
| 2026-06-30 | CPA257 | - | Jun 30, 05:35 UTC | Jun 30, 13:55 UTC | 8h 20m |
| 2026-06-30 | CPA257 | - | Jun 30, 00:35 UTC | Jun 30, 00:49 UTC | 15m |
| 2026-06-28 | CPA801 | - | Jun 28, 22:24 UTC | Jun 29, 12:55 UTC | 14h 30m |
| 2026-06-28 | CPA806 | - | Jun 28, 06:10 UTC | Jun 28, 19:40 UTC | 13h 30m |
| 2026-06-28 | CPA806 | - | Jun 28, 05:20 UTC | Jun 28, 05:40 UTC | 20m |
| 2026-06-27 | CPA270 | - | Jun 27, 21:59 UTC | Jun 27, 22:29 UTC | 30m |
| 2026-06-27 | CPA270 | - | Jun 27, 11:25 UTC | Jun 27, 15:24 UTC | 4h 0m |
| 2026-06-26 | CPA271 | - | Jun 26, 15:49 UTC | Jun 27, 05:15 UTC | 13h 25m |
| 2026-06-26 | CPA801 | - | Jun 26, 11:34 UTC | Jun 26, 12:19 UTC | 45m |
| 2026-06-25 | CPA801 | - | Jun 25, 21:29 UTC | Jun 26, 09:35 UTC | 12h 5m |
| 2026-06-25 | CPA806 | - | Jun 25, 05:25 UTC | Jun 25, 18:19 UTC | 12h 55m |
| 2026-06-25 | CPA806 | - | Jun 25, 04:35 UTC | Jun 25, 04:54 UTC | 20m |
| 2026-06-24 | CPA270 | AMS → HKG | Jun 24, 11:20 UTC | Jun 24, 22:29 UTC | 11h 10m |
| 2026-06-24 | CPA271 | - | Jun 24, 02:45 UTC | Jun 24, 04:24 UTC | 1h 40m |
| 2026-06-23 | CPA271 | - | Jun 23, 15:30 UTC | Jun 23, 15:44 UTC | 15m |
| 2026-06-23 | CPA801 | - | Jun 23, 12:40 UTC | Jun 23, 12:55 UTC | 15m |
| 2026-06-22 | CPA801 | - | Jun 22, 21:40 UTC | Jun 23, 12:09 UTC | 14h 30m |
| 2026-06-22 | CPA806 | HKG → ORD | Jun 22, 04:49 UTC | Jun 22, 18:40 UTC | 13h 50m |
| 2026-06-21 | CPA270 | - | Jun 21, 11:34 UTC | Jun 21, 22:49 UTC | 11h 15m |
| 2026-06-20 | CPA271 | - | Jun 20, 23:55 UTC | Jun 21, 04:39 UTC | 4h 45m |
| 2026-06-20 | CPA271 | - | Jun 20, 15:34 UTC | Jun 20, 15:54 UTC | 20m |
| 2026-06-20 | CPA801 | - | Jun 20, 12:24 UTC | Jun 20, 12:39 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-LXH page for operator, model, and routing details .