sensors Mode-S transponder
781570
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-303X · AIRBUS A-321neo
- Hex
- 781570
- Octal
- 36012560
- Decimal
- 7,869,808
- Country
- CN
- Tail
- B-303X
- Type
- A21N
- Flights observed
- 38
- Distinct callsigns
- 19
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 781570 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 19 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN672 | China Southern Airlines | 5 | 2026-05-29 |
| CSN6312 | China Southern Airlines | 5 | 2026-05-26 |
| CSN6311 | China Southern Airlines | 4 | 2026-05-26 |
| CSN671 | China Southern Airlines | 3 | 2026-05-29 |
| CSN6501 | - | 2 | 2026-04-13 |
| CSN6456 | China Southern Airlines | 2 | 2026-05-04 |
| CSN6367 | China Southern Airlines | 2 | 2026-04-30 |
| CSN6347 | China Southern Airlines | 2 | 2026-04-25 |
| CSN5857 | China Southern Airlines | 2 | 2026-04-29 |
| CSN5366 | China Southern Airlines | 2 | 2026-04-26 |
| CSN682 | - | 1 | 2026-04-13 |
| CSN681 | China Southern Airlines | 1 | 2026-04-13 |
| CSN6483 | China Southern Airlines | 1 | 2026-04-19 |
| CSN6403 | China Southern Airlines | 1 | 2026-04-21 |
| CSN6402 | China Southern Airlines | 1 | 2026-05-06 |
| CSN6368 | China Southern Airlines | 1 | 2026-04-30 |
| CSN6339 | China Southern Airlines | 1 | 2026-05-08 |
| CSN6310 | China Southern Airlines | 1 | 2026-05-01 |
| CSN6309 | China Southern Airlines | 1 | 2026-05-01 |
Recent flights last 38
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CSN672 | ICN → SHE | May 29, 13:00 UTC | May 29, 13:25 UTC | 25m |
| 2026-05-29 | CSN671 | SHE → ICN | May 29, 10:55 UTC | May 29, 11:20 UTC | 25m |
| 2026-05-26 | CSN6312 | SZX → SHE | May 26, 08:15 UTC | May 27, 04:45 UTC | 20h 30m |
| 2026-05-26 | CSN6312 | SZX → SHE | May 26, 05:59 UTC | May 26, 06:14 UTC | 15m |
| 2026-05-26 | CSN6311 | SHE → SZX | May 26, 01:05 UTC | May 26, 01:24 UTC | 20m |
| 2026-05-14 | CSN6312 | SZX → SHE | May 14, 06:45 UTC | May 14, 07:00 UTC | 15m |
| 2026-05-08 | CSN6339 | SHE → CAN | May 8, 11:25 UTC | May 9, 02:30 UTC | 15h 5m |
| 2026-05-06 | CSN672 | ICN → SHE | May 6, 13:00 UTC | May 6, 13:15 UTC | 15m |
| 2026-05-06 | CSN6402 | TFU → SHE | May 6, 07:40 UTC | May 6, 10:30 UTC | 2h 50m |
| 2026-05-05 | CSN672 | ICN → SHE | May 5, 13:05 UTC | May 5, 13:20 UTC | 15m |
| 2026-05-04 | CSN6456 | XIY → SHE | May 4, 14:35 UTC | May 5, 07:50 UTC | 17h 16m |
| 2026-05-04 | CSN6456 | XIY → SHE | May 4, 01:20 UTC | May 4, 14:40 UTC | 13h 20m |
| 2026-05-03 | CSN672 | ICN → SHE | May 3, 13:10 UTC | May 3, 13:20 UTC | 10m |
| 2026-05-03 | CSN671 | SHE → ICN | May 3, 11:15 UTC | May 3, 11:25 UTC | 10m |
| 2026-05-01 | CSN6310 | SZX → SHE | May 1, 09:40 UTC | May 1, 09:50 UTC | 10m |
| 2026-05-01 | CSN6309 | SHE → SZX | May 1, 07:30 UTC | May 1, 07:50 UTC | 20m |
| 2026-04-30 | CSN6368 | CAN → SHE | Apr 30, 10:25 UTC | May 1, 05:15 UTC | 18h 50m |
| 2026-04-30 | CSN6367 | SHE → CAN | Apr 30, 02:55 UTC | Apr 30, 10:35 UTC | 7h 40m |
| 2026-04-29 | CSN6367 | SHE → CAN | Apr 29, 08:05 UTC | Apr 30, 03:15 UTC | 19h 10m |
| 2026-04-29 | CSN5857 | SHE → HGH | Apr 29, 00:59 UTC | Apr 29, 08:30 UTC | 7h 30m |
| 2026-04-27 | CSN6312 | SZX → SHE | Apr 27, 05:55 UTC | Apr 27, 06:05 UTC | 10m |
| 2026-04-27 | CSN6311 | SHE → SZX | Apr 27, 03:35 UTC | Apr 27, 03:55 UTC | 20m |
| 2026-04-26 | CSN5366 | KMG → SHE | Apr 26, 09:55 UTC | Apr 27, 01:15 UTC | 15h 20m |
| 2026-04-25 | CSN5366 | KMG → SHE | Apr 25, 12:20 UTC | Apr 26, 10:00 UTC | 21h 40m |
| 2026-04-25 | CSN6347 | SHE → CAN | Apr 25, 05:00 UTC | Apr 25, 12:20 UTC | 7h 20m |
| 2026-04-24 | CSN6347 | SHE → CAN | Apr 24, 09:20 UTC | Apr 25, 05:05 UTC | 19h 45m |
| 2026-04-24 | CSN6312 | SZX → SHE | Apr 24, 07:05 UTC | Apr 24, 07:15 UTC | 10m |
| 2026-04-24 | CSN6311 | SHE → SZX | Apr 24, 04:05 UTC | Apr 24, 04:20 UTC | 15m |
| 2026-04-23 | CSN6311 | SHE → SZX | Apr 23, 09:55 UTC | Apr 24, 01:30 UTC | 15h 34m |
| 2026-04-21 | CSN6403 | SHE → CKG | Apr 21, 01:20 UTC | Apr 21, 07:05 UTC | 5h 45m |
| 2026-04-19 | CSN6483 | SHE → SYX | Apr 19, 02:05 UTC | Apr 19, 10:30 UTC | 8h 25m |
| 2026-04-17 | CSN672 | ICN → SHE | Apr 17, 12:55 UTC | Apr 17, 13:10 UTC | 15m |
| 2026-04-17 | CSN671 | SHE → ICN | Apr 17, 11:05 UTC | Apr 17, 11:15 UTC | 10m |
| 2026-04-16 | CSN5857 | SHE → HGH | Apr 16, 07:54 UTC | Apr 16, 08:35 UTC | 40m |
| 2026-04-13 | CSN6501 | - | Apr 13, 07:55 UTC | Apr 13, 08:10 UTC | 15m |
| 2026-04-13 | CSN6501 | - | Apr 13, 07:30 UTC | Apr 13, 08:10 UTC | 40m |
| 2026-04-13 | CSN682 | - | Apr 13, 04:05 UTC | Apr 13, 04:15 UTC | 10m |
| 2026-04-13 | CSN681 | SHE → ICN | Apr 13, 02:10 UTC | Apr 13, 02:20 UTC | 10m |
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-303X page for operator, model, and routing details .