sensors Mode-S transponder
781737
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-309W · AIRBUS A-350-900
- Hex
- 781737
- Octal
- 36013467
- Decimal
- 7,870,263
- Country
- CN
- Tail
- B-309W
- Type
- A359
- Flights observed
- 78
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 781737 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 |
|---|---|---|---|
| CSN8044 | China Southern Airlines | 13 | 2026-04-19 |
| CSN8031 | China Southern Airlines | 13 | 2026-04-19 |
| CSN326 | China Southern Airlines | 8 | 2026-05-26 |
| CSN308 | China Southern Airlines | 6 | 2026-05-27 |
| CSN307 | China Southern Airlines | 6 | 2026-05-26 |
| CSN325 | China Southern Airlines | 4 | 2026-05-25 |
| CSN8027 | China Southern Airlines | 3 | 2026-05-27 |
| CSN655 | China Southern Airlines | 3 | 2026-05-21 |
| CSN348 | China Southern Airlines | 3 | 2026-05-20 |
| CSN8028 | China Southern Airlines | 2 | 2026-05-28 |
| CSN656 | China Southern Airlines | 2 | 2026-05-21 |
| CSN3552 | China Southern Airlines | 2 | 2026-04-20 |
| CSN347 | China Southern Airlines | 2 | 2026-05-19 |
| CSN322 | China Southern Airlines | 2 | 2026-05-08 |
| CSN8004 | China Southern Airlines | 1 | 2026-05-05 |
| CSN8003 | China Southern Airlines | 1 | 2026-05-05 |
| CSN3551 | - | 1 | 2026-04-13 |
| CSN3523 | China Southern Airlines | 1 | 2026-04-22 |
| CSN350 | China Southern Airlines | 1 | 2026-05-16 |
| CSN349 | China Southern Airlines | 1 | 2026-05-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-28 | CSN8028 | SVO → CAN | May 28, 13:40 UTC | May 28, 17:05 UTC | 3h 25m |
| 2026-05-27 | CSN8027 | CAN → SVO | May 27, 17:00 UTC | May 28, 11:10 UTC | 18h 10m |
| 2026-05-27 | CSN8027 | CAN → SVO | May 27, 13:50 UTC | May 28, 11:10 UTC | 21h 20m |
| 2026-05-27 | CSN308 | AMS → CAN | May 27, 11:50 UTC | May 28, 11:10 UTC | 23h 20m |
| 2026-05-26 | CSN307 | CAN → AMS | May 26, 21:29 UTC | May 27, 04:04 UTC | 6h 35m |
| 2026-05-26 | CSN326 | SYD → CAN | May 26, 09:04 UTC | May 26, 09:25 UTC | 20m |
| 2026-05-26 | CSN326 | SYD → CAN | May 26, 00:19 UTC | May 26, 08:10 UTC | 7h 50m |
| 2026-05-25 | CSN325 | CAN → SYD | May 25, 13:15 UTC | May 25, 21:15 UTC | 8h 0m |
| 2026-05-23 | CSN326 | SYD → CAN | May 23, 09:00 UTC | May 23, 09:25 UTC | 25m |
| 2026-05-23 | CSN326 | SYD → CAN | May 23, 00:20 UTC | May 23, 08:10 UTC | 7h 50m |
| 2026-05-22 | CSN325 | CAN → SYD | May 22, 13:55 UTC | May 22, 22:15 UTC | 8h 20m |
| 2026-05-21 | CSN656 | SVO → CAN | May 21, 18:50 UTC | May 21, 22:35 UTC | 3h 45m |
| 2026-05-21 | CSN655 | CAN → SVO | May 21, 11:05 UTC | May 21, 15:20 UTC | 4h 15m |
| 2026-05-20 | CSN655 | CAN → SVO | May 20, 15:55 UTC | May 21, 15:20 UTC | 23h 25m |
| 2026-05-20 | CSN348 | CDG → CAN | May 20, 11:50 UTC | May 21, 11:45 UTC | 23h 55m |
| 2026-05-20 | CSN348 | CDG → CAN | May 20, 10:20 UTC | May 20, 16:35 UTC | 6h 15m |
| 2026-05-19 | CSN347 | CAN → CDG | May 19, 21:45 UTC | May 20, 04:55 UTC | 7h 11m |
| 2026-05-17 | CSN308 | AMS → CAN | May 17, 11:35 UTC | May 17, 17:30 UTC | 5h 55m |
| 2026-05-16 | CSN307 | CAN → AMS | May 16, 21:25 UTC | May 17, 04:15 UTC | 6h 50m |
| 2026-05-16 | CSN350 | KUL → CAN | May 16, 06:35 UTC | May 16, 06:50 UTC | 15m |
| 2026-05-16 | CSN349 | CAN → KUL | May 16, 04:50 UTC | May 16, 05:05 UTC | 15m |
| 2026-05-15 | CSN348 | CDG → CAN | May 15, 10:15 UTC | May 15, 16:40 UTC | 6h 24m |
| 2026-05-14 | CSN347 | CAN → CDG | May 14, 22:10 UTC | May 15, 05:00 UTC | 6h 50m |
| 2026-05-11 | CSN308 | AMS → CAN | May 11, 11:50 UTC | May 11, 17:30 UTC | 5h 41m |
| 2026-05-10 | CSN307 | CAN → AMS | May 10, 21:44 UTC | May 11, 04:30 UTC | 6h 45m |
| 2026-05-09 | CSN308 | AMS → CAN | May 9, 11:50 UTC | May 9, 17:40 UTC | 5h 50m |
| 2026-05-09 | CSN307 | CAN → AMS | May 9, 02:45 UTC | May 9, 04:30 UTC | 1h 45m |
| 2026-05-08 | CSN322 | MEL → CAN | May 8, 09:19 UTC | May 8, 09:44 UTC | 25m |
| 2026-05-08 | CSN322 | MEL → CAN | May 8, 00:49 UTC | May 8, 08:24 UTC | 7h 35m |
| 2026-05-07 | CSN321 | CAN → MEL | May 7, 14:20 UTC | May 7, 22:35 UTC | 8h 15m |
| 2026-05-07 | CSN326 | SYD → CAN | May 7, 09:05 UTC | May 7, 09:30 UTC | 25m |
| 2026-05-07 | CSN326 | SYD → CAN | May 7, 00:25 UTC | May 7, 08:10 UTC | 7h 45m |
| 2026-05-06 | CSN325 | CAN → SYD | May 6, 13:20 UTC | May 6, 21:30 UTC | 8h 9m |
| 2026-05-05 | CSN8004 | SVO → WUH | May 5, 19:55 UTC | May 5, 23:40 UTC | 3h 45m |
| 2026-05-05 | CSN8003 | WUH → SVO | May 5, 13:20 UTC | May 5, 16:55 UTC | 3h 35m |
| 2026-05-03 | CSN308 | AMS → CAN | May 3, 11:55 UTC | May 3, 17:40 UTC | 5h 45m |
| 2026-05-02 | CSN307 | CAN → AMS | May 2, 21:30 UTC | May 3, 04:30 UTC | 6h 59m |
| 2026-04-30 | CSN656 | SVO → CAN | Apr 30, 18:40 UTC | Apr 30, 22:25 UTC | 3h 45m |
| 2026-04-30 | CSN655 | CAN → SVO | Apr 30, 11:15 UTC | Apr 30, 15:20 UTC | 4h 5m |
| 2026-04-29 | CSN326 | SYD → CAN | Apr 29, 09:25 UTC | Apr 29, 09:45 UTC | 20m |
| 2026-04-29 | CSN326 | SYD → CAN | Apr 29, 01:05 UTC | Apr 29, 08:25 UTC | 7h 20m |
| 2026-04-28 | CSN325 | CAN → SYD | Apr 28, 14:30 UTC | Apr 28, 23:10 UTC | 8h 40m |
| 2026-04-27 | CSN308 | AMS → CAN | Apr 27, 11:45 UTC | Apr 27, 17:40 UTC | 5h 55m |
| 2026-04-26 | CSN307 | CAN → AMS | Apr 26, 21:35 UTC | Apr 27, 04:05 UTC | 6h 30m |
| 2026-04-23 | CSN8028 | SVO → CAN | Apr 23, 15:55 UTC | Apr 23, 17:20 UTC | 1h 25m |
| 2026-04-23 | CSN8027 | CAN → SVO | Apr 23, 09:25 UTC | Apr 23, 13:45 UTC | 4h 20m |
| 2026-04-22 | CSN3523 | CAN → SHA | Apr 22, 01:55 UTC | Apr 22, 02:05 UTC | 10m |
| 2026-04-21 | CSN3255 | SZX → SHA | Apr 21, 03:15 UTC | Apr 21, 03:25 UTC | 10m |
| 2026-04-20 | CSN3552 | SHA → SZX | Apr 20, 10:40 UTC | Apr 20, 11:00 UTC | 20m |
| 2026-04-19 | CSN8044 | SJD → SZX | Apr 19, 11:00 UTC | Apr 19, 23:40 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-309W page for operator, model, and routing details .