sensors Mode-S transponder
780F79
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-8423 · AIRBUS A-321
- Hex
- 780F79
- Octal
- 36007571
- Decimal
- 7,868,281
- Country
- CN
- Tail
- B-8423
- Type
- A321
- Flights observed
- 32
- Distinct callsigns
- 18
- Country
- CN
- Last broadcast
- 11d ago
Last known position
Country allocation
The ICAO 24-bit address 780F79 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN6782 | China Southern Airlines | 6 | 2026-05-04 |
| CSN3836 | China Southern Airlines | 3 | 2026-05-10 |
| CSN3835 | China Southern Airlines | 3 | 2026-04-26 |
| CSN6734 | China Southern Airlines | 2 | 2026-04-27 |
| CSN6732 | China Southern Airlines | 2 | 2026-05-19 |
| CSN6630 | China Southern Airlines | 2 | 2026-05-01 |
| CSN6629 | China Southern Airlines | 2 | 2026-05-05 |
| CSN6623 | China Southern Airlines | 2 | 2026-05-02 |
| CSN6781 | China Southern Airlines | 1 | 2026-04-16 |
| CSN6758 | China Southern Airlines | 1 | 2026-05-16 |
| CSN6754 | China Southern Airlines | 1 | 2026-04-22 |
| CSN6753 | China Southern Airlines | 1 | 2026-04-19 |
| CSN6744 | China Southern Airlines | 1 | 2026-05-15 |
| CSN6624 | China Southern Airlines | 1 | 2026-04-16 |
| CSN6497 | China Southern Airlines | 1 | 2026-04-21 |
| CSN3977 | China Southern Airlines | 1 | 2026-04-21 |
| CSN3584 | China Southern Airlines | 1 | 2026-04-21 |
| CSN3583 | China Southern Airlines | 1 | 2026-04-21 |
Recent flights last 32
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-19 | CSN6732 | CAN → SYX | May 19, 02:50 UTC | May 19, 03:00 UTC | 10m |
| 2026-05-16 | CSN6758 | SZX → SYX | May 16, 15:25 UTC | May 16, 15:35 UTC | 10m |
| 2026-05-15 | CSN6744 | CAN → SYX | May 15, 10:50 UTC | May 15, 11:10 UTC | 20m |
| 2026-05-10 | CSN3836 | PVG → SYX | May 10, 05:04 UTC | May 10, 10:49 UTC | 5h 45m |
| 2026-05-09 | CSN3836 | PVG → SYX | May 9, 15:50 UTC | May 10, 10:49 UTC | 19h 0m |
| 2026-05-05 | CSN6629 | SYX → HGH | May 5, 06:55 UTC | May 5, 12:10 UTC | 5h 15m |
| 2026-05-04 | CSN6782 | PVG → SYX | May 4, 14:20 UTC | May 5, 12:10 UTC | 21h 51m |
| 2026-05-04 | CSN6782 | PVG → SYX | May 4, 08:55 UTC | May 5, 07:05 UTC | 22h 11m |
| 2026-05-02 | CSN6623 | SYX → NKG | May 2, 09:10 UTC | May 2, 09:20 UTC | 10m |
| 2026-05-01 | CSN6630 | CGQ → HGH | May 1, 12:00 UTC | May 2, 09:20 UTC | 21h 20m |
| 2026-05-01 | CSN6629 | SYX → HGH | May 1, 06:55 UTC | May 1, 12:15 UTC | 5h 20m |
| 2026-04-30 | CSN6782 | PVG → SYX | Apr 30, 14:45 UTC | May 1, 12:15 UTC | 21h 30m |
| 2026-04-30 | CSN6782 | PVG → SYX | Apr 30, 09:45 UTC | May 1, 07:10 UTC | 21h 25m |
| 2026-04-30 | CSN6782 | PVG → SYX | Apr 30, 05:50 UTC | Apr 30, 15:00 UTC | 9h 10m |
| 2026-04-29 | CSN6623 | SYX → NKG | Apr 29, 10:20 UTC | Apr 30, 09:45 UTC | 23h 24m |
| 2026-04-27 | CSN6734 | CAN → SYX | Apr 27, 06:15 UTC | Apr 27, 06:30 UTC | 15m |
| 2026-04-26 | CSN3835 | SYX → PVG | Apr 26, 04:55 UTC | Apr 26, 10:45 UTC | 5h 50m |
| 2026-04-25 | CSN3835 | SYX → PVG | Apr 25, 10:55 UTC | Apr 26, 06:10 UTC | 19h 15m |
| 2026-04-24 | CSN6630 | CGQ → HGH | Apr 24, 08:35 UTC | Apr 24, 13:00 UTC | 4h 25m |
| 2026-04-22 | CSN6754 | PVG → SYX | Apr 22, 01:15 UTC | Apr 22, 07:20 UTC | 6h 5m |
| 2026-04-21 | CSN6497 | SZX → SYX | Apr 21, 12:25 UTC | Apr 21, 12:40 UTC | 15m |
| 2026-04-21 | CSN3584 | KHN → SZX | Apr 21, 10:25 UTC | Apr 21, 10:40 UTC | 15m |
| 2026-04-21 | CSN3583 | SZX → KHN | Apr 21, 04:25 UTC | Apr 21, 04:45 UTC | 20m |
| 2026-04-21 | CSN3977 | SYX → SZX | Apr 21, 02:40 UTC | Apr 21, 02:55 UTC | 15m |
| 2026-04-20 | CSN6734 | CAN → SYX | Apr 20, 06:20 UTC | Apr 20, 06:30 UTC | 10m |
| 2026-04-19 | CSN6753 | SYX → PVG | Apr 19, 01:00 UTC | Apr 19, 06:55 UTC | 5h 55m |
| 2026-04-17 | CSN6732 | CAN → SYX | Apr 17, 02:25 UTC | Apr 17, 02:40 UTC | 15m |
| 2026-04-16 | CSN6782 | - | Apr 16, 14:30 UTC | Apr 16, 14:40 UTC | 10m |
| 2026-04-16 | CSN6781 | SYX → PVG | Apr 16, 09:19 UTC | Apr 16, 09:35 UTC | 15m |
| 2026-04-16 | CSN6624 | NKG → SYX | Apr 16, 06:00 UTC | Apr 16, 06:25 UTC | 25m |
| 2026-04-14 | CSN3836 | PVG → SYX | Apr 14, 11:45 UTC | Apr 14, 11:55 UTC | 10m |
| 2026-04-14 | CSN3835 | SYX → PVG | Apr 14, 06:05 UTC | Apr 14, 06:35 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-8423 page for operator, model, and routing details .