sensors Mode-S transponder
780C35
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1950 · BOEING 737-800
- Hex
- 780C35
- Octal
- 36006065
- Decimal
- 7,867,445
- Country
- CN
- Tail
- B-1950
- Type
- B738
- Flights observed
- 35
- Distinct callsigns
- 15
- Country
- CN
- Last broadcast
- 6d ago
Last known position
Country allocation
The ICAO 24-bit address 780C35 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN3356 | China Southern Airlines | 7 | 2026-06-16 |
| CSN3355 | - | 7 | 2026-06-16 |
| CSN8464 | China Southern Airlines | 3 | 2026-06-18 |
| CSN8463 | China Southern Airlines | 3 | 2026-06-17 |
| CSN8318 | - | 3 | 2026-07-01 |
| CSN3631 | - | 3 | 2026-07-12 |
| CSN8317 | China Southern Airlines | 1 | 2026-04-20 |
| CSN8280 | - | 1 | 2026-07-05 |
| CSN3845 | China Southern Airlines | 1 | 2026-06-02 |
| CSN3834 | - | 1 | 2026-07-02 |
| CSN3780 | China Southern Airlines | 1 | 2026-05-30 |
| CSN3779 | China Southern Airlines | 1 | 2026-06-03 |
| CSN3774 | - | 1 | 2026-07-02 |
| CSN3773 | - | 1 | 2026-07-02 |
| CSN3632 | - | 1 | 2026-06-21 |
Recent flights last 35
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-12 | CSN3631 | - | Jul 12, 01:00 UTC | Jul 12, 05:25 UTC | 4h 25m |
| 2026-07-11 | CSN3631 | - | Jul 11, 03:30 UTC | Jul 12, 01:20 UTC | 21h 50m |
| 2026-07-05 | CSN8280 | - | Jul 5, 14:20 UTC | Jul 6, 02:00 UTC | 11h 40m |
| 2026-07-02 | CSN3774 | - | Jul 2, 23:05 UTC | Jul 2, 23:15 UTC | 10m |
| 2026-07-02 | CSN3773 | - | Jul 2, 17:00 UTC | Jul 2, 17:15 UTC | 15m |
| 2026-07-02 | CSN3834 | - | Jul 2, 12:10 UTC | Jul 2, 12:30 UTC | 20m |
| 2026-07-01 | CSN8318 | - | Jul 1, 15:30 UTC | Jul 2, 02:05 UTC | 10h 35m |
| 2026-06-29 | CSN8318 | - | Jun 29, 15:30 UTC | Jun 29, 20:44 UTC | 5h 15m |
| 2026-06-26 | CSN8318 | SGN → WUH | Jun 26, 15:25 UTC | Jun 26, 20:55 UTC | 5h 30m |
| 2026-06-21 | CSN3632 | - | Jun 21, 01:10 UTC | Jun 21, 09:55 UTC | 8h 45m |
| 2026-06-18 | CSN8464 | SZX → WUH | Jun 18, 00:35 UTC | Jun 18, 00:45 UTC | 10m |
| 2026-06-17 | CSN8463 | WUH → SZX | Jun 17, 16:50 UTC | Jun 17, 17:25 UTC | 35m |
| 2026-06-16 | CSN3356 | SZX → WUH | Jun 16, 14:50 UTC | Jun 16, 15:00 UTC | 10m |
| 2026-06-16 | CSN3355 | - | Jun 16, 13:09 UTC | Jun 16, 13:34 UTC | 25m |
| 2026-06-09 | CSN8464 | SZX → WUH | Jun 9, 00:15 UTC | Jun 9, 00:25 UTC | 10m |
| 2026-06-08 | CSN8463 | WUH → SZX | Jun 8, 17:55 UTC | Jun 8, 18:20 UTC | 25m |
| 2026-06-07 | CSN3631 | SZX → HZA | Jun 7, 01:09 UTC | Jun 7, 05:30 UTC | 4h 20m |
| 2026-06-06 | CSN3356 | SZX → WUH | Jun 6, 14:54 UTC | Jun 6, 15:10 UTC | 15m |
| 2026-06-06 | CSN3355 | WUH → SZX | Jun 6, 13:00 UTC | Jun 6, 13:30 UTC | 30m |
| 2026-06-03 | CSN3356 | SZX → WUH | Jun 3, 13:45 UTC | Jun 3, 13:55 UTC | 10m |
| 2026-06-03 | CSN3355 | WUH → SZX | Jun 3, 11:00 UTC | Jun 3, 11:20 UTC | 20m |
| 2026-06-03 | CSN3779 | CAN → NGB | Jun 3, 01:15 UTC | Jun 3, 05:05 UTC | 3h 50m |
| 2026-06-02 | CSN3845 | WUH → ZUH | Jun 2, 01:50 UTC | Jun 2, 09:10 UTC | 7h 20m |
| 2026-05-30 | CSN3356 | SZX → WUH | May 30, 14:45 UTC | May 30, 14:55 UTC | 10m |
| 2026-05-30 | CSN3355 | WUH → SZX | May 30, 12:10 UTC | May 30, 12:30 UTC | 20m |
| 2026-05-30 | CSN3780 | NGB → CAN | May 30, 04:10 UTC | May 30, 04:25 UTC | 15m |
| 2026-05-25 | CSN3356 | SZX → WUH | May 25, 12:40 UTC | May 25, 12:50 UTC | 10m |
| 2026-04-21 | CSN3356 | SZX → WUH | Apr 21, 11:25 UTC | Apr 21, 11:35 UTC | 10m |
| 2026-04-21 | CSN3355 | WUH → SZX | Apr 21, 09:00 UTC | Apr 21, 09:25 UTC | 25m |
| 2026-04-20 | CSN8317 | WUH → SGN | Apr 20, 15:30 UTC | Apr 20, 15:50 UTC | 20m |
| 2026-04-18 | CSN3356 | SZX → WUH | Apr 18, 11:15 UTC | Apr 18, 11:25 UTC | 10m |
| 2026-04-18 | CSN3355 | WUH → SZX | Apr 18, 09:25 UTC | Apr 18, 09:45 UTC | 20m |
| 2026-04-17 | CSN3355 | WUH → SZX | Apr 17, 13:50 UTC | Apr 17, 14:15 UTC | 25m |
| 2026-04-16 | CSN8464 | SZX → WUH | Apr 16, 00:15 UTC | Apr 16, 00:30 UTC | 15m |
| 2026-04-15 | CSN8463 | WUH → SZX | Apr 15, 17:10 UTC | Apr 15, 17:40 UTC | 30m |
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-1950 page for operator, model, and routing details .