sensors Mode-S transponder
780999
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5716 · BOEING 737-800
- Hex
- 780999
- Octal
- 36004631
- Decimal
- 7,866,777
- Country
- CN
- Tail
- B-5716
- Type
- B738
- Flights observed
- 45
- Distinct callsigns
- 18
- Country
- CN
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 780999 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 |
|---|---|---|---|
| CSN3857 | - | 12 | 2026-05-31 |
| CSN5147 | China Southern Airlines | 5 | 2026-06-02 |
| CSN5153 | - | 4 | 2026-05-06 |
| CSN6195 | - | 3 | 2026-05-18 |
| CSN5148 | China Southern Airlines | 3 | 2026-06-02 |
| CSN8540 | - | 2 | 2026-05-20 |
| CSN8539 | - | 2 | 2026-06-01 |
| CSN5154 | - | 2 | 2026-05-07 |
| CSN3875 | China Southern Airlines | 2 | 2026-05-01 |
| CSN8521 | China Southern Airlines | 1 | 2026-05-23 |
| CSN6703 | China Southern Airlines | 1 | 2026-06-03 |
| CSN5888 | - | 1 | 2026-04-13 |
| CSN5887 | - | 1 | 2026-04-13 |
| CSN5742 | - | 1 | 2026-05-21 |
| CSN3876 | China Southern Airlines | 1 | 2026-04-25 |
| CSN3825 | China Southern Airlines | 1 | 2026-05-09 |
| CSN3796 | China Southern Airlines | 1 | 2026-06-02 |
| CSN3273 | China Southern Airlines | 1 | 2026-05-29 |
Recent flights last 45
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-03 | CSN6703 | YIW → ZUH | Jun 3, 01:30 UTC | Jun 3, 01:50 UTC | 20m |
| 2026-06-02 | CSN5148 | HAK → YIW | Jun 2, 11:45 UTC | Jun 2, 12:45 UTC | 1h 0m |
| 2026-06-02 | CSN5147 | YIW → HAK | Jun 2, 05:00 UTC | Jun 2, 08:45 UTC | 3h 45m |
| 2026-06-02 | CSN3796 | YIW → CAN | Jun 2, 01:30 UTC | Jun 2, 01:45 UTC | 15m |
| 2026-06-01 | CSN8539 | - | Jun 1, 06:40 UTC | Jun 1, 11:50 UTC | 5h 10m |
| 2026-05-31 | CSN3857 | - | May 31, 23:30 UTC | Jun 1, 05:10 UTC | 5h 40m |
| 2026-05-29 | CSN3273 | NNG → SZX | May 29, 09:55 UTC | May 29, 10:30 UTC | 35m |
| 2026-05-28 | CSN5147 | YIW → HAK | May 28, 09:35 UTC | May 28, 13:20 UTC | 3h 45m |
| 2026-05-27 | - | - | May 27, 03:09 UTC | May 27, 03:20 UTC | 10m |
| 2026-05-24 | CSN5147 | YIW → HAK | May 24, 08:15 UTC | May 24, 13:40 UTC | 5h 25m |
| 2026-05-23 | CSN8521 | SHE → YIW | May 23, 03:35 UTC | May 23, 04:15 UTC | 40m |
| 2026-05-22 | CSN8539 | - | May 22, 07:45 UTC | May 22, 13:05 UTC | 5h 20m |
| 2026-05-21 | CSN3857 | - | May 21, 23:45 UTC | May 22, 04:55 UTC | 5h 10m |
| 2026-05-21 | CSN5742 | - | May 21, 09:30 UTC | May 21, 09:45 UTC | 15m |
| 2026-05-20 | CSN8540 | - | May 20, 11:55 UTC | May 21, 09:45 UTC | 21h 50m |
| 2026-05-19 | CSN3857 | - | May 19, 23:45 UTC | May 20, 12:00 UTC | 12h 16m |
| 2026-05-19 | CSN3857 | - | May 19, 03:35 UTC | May 20, 00:05 UTC | 20h 30m |
| 2026-05-18 | CSN6195 | - | May 18, 23:45 UTC | May 19, 03:40 UTC | 3h 55m |
| 2026-05-18 | CSN6195 | - | May 18, 07:30 UTC | May 19, 03:40 UTC | 20h 9m |
| 2026-05-17 | CSN5148 | HAK → YIW | May 17, 11:45 UTC | May 18, 07:35 UTC | 19h 50m |
| 2026-05-17 | CSN5147 | YIW → HAK | May 17, 08:00 UTC | May 17, 11:55 UTC | 3h 55m |
| 2026-05-14 | CSN3857 | - | May 14, 23:55 UTC | May 15, 12:30 UTC | 12h 35m |
| 2026-05-14 | CSN3857 | - | May 14, 07:30 UTC | May 15, 04:45 UTC | 21h 15m |
| 2026-05-14 | CSN3857 | - | May 14, 03:45 UTC | May 15, 00:20 UTC | 20h 35m |
| 2026-05-14 | CSN6195 | - | May 14, 00:00 UTC | May 14, 07:35 UTC | 7h 35m |
| 2026-05-12 | CSN5148 | HAK → YIW | May 12, 11:45 UTC | May 12, 11:55 UTC | 10m |
| 2026-05-12 | CSN5147 | YIW → HAK | May 12, 08:50 UTC | May 12, 09:15 UTC | 25m |
| 2026-05-10 | CSN3857 | - | May 10, 23:39 UTC | May 11, 11:45 UTC | 12h 5m |
| 2026-05-09 | CSN3825 | WUH → TAO | May 9, 07:35 UTC | May 9, 07:45 UTC | 10m |
| 2026-05-07 | CSN3857 | - | May 7, 23:45 UTC | May 8, 05:49 UTC | 6h 5m |
| 2026-05-07 | CSN5154 | - | May 7, 05:20 UTC | May 7, 05:35 UTC | 15m |
| 2026-05-06 | CSN5153 | - | May 6, 11:50 UTC | May 7, 03:10 UTC | 15h 19m |
| 2026-05-06 | CSN5153 | - | May 6, 06:40 UTC | May 7, 03:10 UTC | 20h 29m |
| 2026-05-06 | CSN5153 | - | May 6, 04:30 UTC | May 7, 03:10 UTC | 22h 39m |
| 2026-05-05 | CSN3857 | - | May 5, 23:50 UTC | May 6, 11:55 UTC | 12h 4m |
| 2026-05-05 | CSN3857 | - | May 5, 07:50 UTC | May 6, 04:35 UTC | 20h 45m |
| 2026-05-01 | CSN3875 | YIW → SZX | May 1, 00:35 UTC | May 1, 00:55 UTC | 20m |
| 2026-04-27 | CSN8540 | - | Apr 27, 06:45 UTC | Apr 27, 11:40 UTC | 4h 55m |
| 2026-04-26 | CSN3857 | - | Apr 26, 23:45 UTC | Apr 27, 04:50 UTC | 5h 5m |
| 2026-04-25 | CSN3876 | SZX → YIW | Apr 25, 03:00 UTC | Apr 25, 03:10 UTC | 10m |
| 2026-04-25 | CSN3875 | YIW → SZX | Apr 25, 00:45 UTC | Apr 25, 01:00 UTC | 15m |
| 2026-04-18 | CSN5154 | - | Apr 18, 05:25 UTC | Apr 18, 05:45 UTC | 20m |
| 2026-04-18 | CSN5153 | - | Apr 18, 02:20 UTC | Apr 18, 02:40 UTC | 20m |
| 2026-04-13 | CSN5888 | - | Apr 13, 12:20 UTC | Apr 13, 12:45 UTC | 25m |
| 2026-04-13 | CSN5887 | - | Apr 13, 09:25 UTC | Apr 13, 09:45 UTC | 20m |
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-5716 page for operator, model, and routing details .