sensors Mode-S transponder
78125E
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-8900 · AIRBUS A-321
- Hex
- 78125E
- Octal
- 36011136
- Decimal
- 7,869,022
- Country
- CN
- Tail
- B-8900
- Type
- A321
- Flights observed
- 22
- Distinct callsigns
- 11
- Country
- CN
- Last broadcast
- 1d ago
Current position
Country allocation
The ICAO 24-bit address 78125E 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN6624 | China Southern Airlines | 4 | 2026-05-24 |
| CSN6623 | China Southern Airlines | 4 | 2026-05-04 |
| CSN6782 | China Southern Airlines | 3 | 2026-05-05 |
| CSN6744 | China Southern Airlines | 3 | 2026-05-22 |
| CSN6781 | China Southern Airlines | 2 | 2026-04-18 |
| CSN8751 | China Southern Airlines | 1 | 2026-05-29 |
| CSN675R | - | 1 | 2026-05-21 |
| CSN6734 | China Southern Airlines | 1 | 2026-04-23 |
| CSN6732 | China Southern Airlines | 1 | 2026-04-15 |
| CSN6629 | China Southern Airlines | 1 | 2026-04-22 |
| CSN3836 | China Southern Airlines | 1 | 2026-04-24 |
Recent flights last 22
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CSN8751 | SYX → TFU | May 29, 01:10 UTC | May 29, 01:20 UTC | 10m |
| 2026-05-24 | CSN6624 | NKG → SYX | May 24, 07:10 UTC | May 24, 07:20 UTC | 10m |
| 2026-05-22 | CSN6744 | CAN → SYX | May 22, 10:55 UTC | May 22, 11:05 UTC | 10m |
| 2026-05-21 | CSN675R | - | May 21, 06:50 UTC | May 21, 07:05 UTC | 15m |
| 2026-05-05 | CSN6782 | PVG → SYX | May 5, 05:45 UTC | May 5, 14:30 UTC | 8h 45m |
| 2026-05-04 | CSN6623 | SYX → NKG | May 4, 09:10 UTC | May 5, 05:50 UTC | 20h 41m |
| 2026-04-30 | CSN6744 | CAN → SYX | Apr 30, 15:20 UTC | Apr 30, 15:30 UTC | 10m |
| 2026-04-29 | CSN6624 | NKG → SYX | Apr 29, 06:39 UTC | Apr 29, 06:55 UTC | 15m |
| 2026-04-26 | CSN6744 | CAN → SYX | Apr 26, 10:50 UTC | Apr 26, 11:00 UTC | 10m |
| 2026-04-24 | CSN3836 | PVG → SYX | Apr 24, 05:45 UTC | Apr 24, 11:05 UTC | 5h 20m |
| 2026-04-23 | CSN6734 | CAN → SYX | Apr 23, 11:05 UTC | Apr 24, 05:45 UTC | 18h 40m |
| 2026-04-22 | CSN6629 | SYX → HGH | Apr 22, 07:10 UTC | Apr 22, 16:25 UTC | 9h 15m |
| 2026-04-19 | CSN6623 | SYX → NKG | Apr 19, 09:05 UTC | Apr 20, 06:30 UTC | 21h 25m |
| 2026-04-18 | CSN6782 | - | Apr 18, 14:15 UTC | Apr 19, 09:15 UTC | 19h 0m |
| 2026-04-18 | CSN6781 | SYX → PVG | Apr 18, 09:05 UTC | Apr 18, 09:15 UTC | 10m |
| 2026-04-18 | CSN6624 | NKG → SYX | Apr 18, 05:55 UTC | Apr 18, 14:30 UTC | 8h 35m |
| 2026-04-17 | CSN6623 | SYX → NKG | Apr 17, 10:50 UTC | Apr 17, 11:00 UTC | 10m |
| 2026-04-15 | CSN6732 | CAN → SYX | Apr 15, 02:25 UTC | Apr 15, 02:40 UTC | 15m |
| 2026-04-14 | CSN6782 | - | Apr 14, 14:20 UTC | Apr 14, 14:30 UTC | 10m |
| 2026-04-14 | CSN6781 | SYX → PVG | Apr 14, 09:15 UTC | Apr 14, 09:25 UTC | 10m |
| 2026-04-14 | CSN6624 | - | Apr 14, 05:55 UTC | Apr 14, 06:10 UTC | 15m |
| 2026-04-13 | CSN6623 | SYX → NKG | Apr 13, 09:10 UTC | Apr 13, 09:25 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-8900 page for operator, model, and routing details .