sensors Mode-S transponder
7809EA
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5746 · BOEING 737-800
- Hex
- 7809EA
- Octal
- 36004752
- Decimal
- 7,866,858
- Country
- CN
- Tail
- B-5746
- Type
- B738
- Flights observed
- 41
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 7809EA 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN8355 | - | 5 | 2026-04-29 |
| CSN8540 | - | 3 | 2026-05-30 |
| CSN6704 | China Southern Airlines | 3 | 2026-05-04 |
| CSN3876 | China Southern Airlines | 3 | 2026-05-21 |
| CSN3875 | China Southern Airlines | 3 | 2026-05-21 |
| CSN3825 | China Southern Airlines | 3 | 2026-04-25 |
| CSN8539 | - | 2 | 2026-05-16 |
| CSN8356 | - | 2 | 2026-04-29 |
| CSN6742 | China Southern Airlines | 2 | 2026-05-29 |
| CSN5153 | - | 2 | 2026-05-27 |
| CSN3857 | - | 2 | 2026-05-02 |
| CSN8521 | - | 1 | 2026-04-13 |
| CSN6703 | China Southern Airlines | 1 | 2026-04-16 |
| CSN5154 | - | 1 | 2026-05-27 |
| CSN5148 | China Southern Airlines | 1 | 2026-05-13 |
| CSN5147 | China Southern Airlines | 1 | 2026-05-13 |
| CSN5116 | - | 1 | 2026-04-24 |
| CSN3858 | - | 1 | 2026-05-24 |
| CSN3795 | China Southern Airlines | 1 | 2026-05-12 |
| CSN3274 | China Southern Airlines | 1 | 2026-05-14 |
Recent flights last 41
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | CSN8540 | - | May 30, 06:25 UTC | May 30, 12:05 UTC | 5h 40m |
| 2026-05-29 | CSN6742 | CGQ → YIW | May 29, 09:20 UTC | May 29, 13:25 UTC | 4h 5m |
| 2026-05-27 | CSN5154 | - | May 27, 05:24 UTC | May 27, 10:40 UTC | 5h 15m |
| 2026-05-27 | CSN5153 | - | May 27, 02:14 UTC | May 27, 02:34 UTC | 20m |
| 2026-05-26 | CSN8540 | - | May 26, 07:10 UTC | May 26, 12:00 UTC | 4h 50m |
| 2026-05-25 | CSN8540 | - | May 25, 11:40 UTC | May 25, 12:00 UTC | 20m |
| 2026-05-24 | CSN3858 | - | May 24, 23:40 UTC | May 25, 05:00 UTC | 5h 20m |
| 2026-05-21 | CSN3876 | SZX → YIW | May 21, 08:35 UTC | May 21, 08:55 UTC | 20m |
| 2026-05-21 | CSN3875 | YIW → SZX | May 21, 04:55 UTC | May 21, 05:05 UTC | 10m |
| 2026-05-16 | CSN8539 | - | May 16, 06:45 UTC | May 16, 11:46 UTC | 5h 0m |
| 2026-05-15 | CSN6742 | CGQ → YIW | May 15, 12:25 UTC | May 16, 04:45 UTC | 16h 19m |
| 2026-05-14 | CSN3274 | SZX → NNG | May 14, 13:40 UTC | May 15, 12:30 UTC | 22h 50m |
| 2026-05-13 | CSN5148 | HAK → YIW | May 13, 11:20 UTC | May 13, 11:30 UTC | 10m |
| 2026-05-13 | CSN5147 | YIW → HAK | May 13, 03:55 UTC | May 13, 08:15 UTC | 4h 20m |
| 2026-05-13 | CSN3876 | SZX → YIW | May 13, 02:55 UTC | May 13, 03:10 UTC | 15m |
| 2026-05-13 | CSN3875 | YIW → SZX | May 13, 00:45 UTC | May 13, 01:05 UTC | 20m |
| 2026-05-12 | CSN3795 | CAN → YIW | May 12, 07:00 UTC | May 12, 07:10 UTC | 10m |
| 2026-05-09 | - | - | May 9, 07:25 UTC | May 9, 07:40 UTC | 15m |
| 2026-05-09 | - | - | May 9, 01:35 UTC | May 9, 01:45 UTC | 10m |
| 2026-05-04 | CSN6704 | ZUH → YIW | May 4, 09:55 UTC | May 4, 10:05 UTC | 10m |
| 2026-05-03 | CSN8539 | - | May 3, 07:20 UTC | May 3, 12:05 UTC | 4h 45m |
| 2026-05-02 | CSN3857 | - | May 2, 23:45 UTC | May 3, 04:55 UTC | 5h 9m |
| 2026-04-29 | CSN8356 | - | Apr 29, 05:40 UTC | Apr 29, 07:55 UTC | 2h 15m |
| 2026-04-29 | CSN8355 | - | Apr 29, 01:59 UTC | Apr 29, 04:29 UTC | 2h 30m |
| 2026-04-25 | CSN3825 | WUH → TAO | Apr 25, 07:40 UTC | Apr 25, 15:55 UTC | 8h 15m |
| 2026-04-24 | CSN3825 | WUH → TAO | Apr 24, 12:45 UTC | Apr 25, 08:00 UTC | 19h 15m |
| 2026-04-24 | CSN3825 | WUH → TAO | Apr 24, 08:55 UTC | Apr 25, 08:00 UTC | 23h 5m |
| 2026-04-24 | CSN5116 | - | Apr 24, 03:15 UTC | Apr 24, 03:40 UTC | 25m |
| 2026-04-21 | CSN3857 | - | Apr 21, 00:00 UTC | Apr 21, 05:10 UTC | 5h 10m |
| 2026-04-20 | CSN8356 | - | Apr 20, 05:30 UTC | Apr 20, 07:45 UTC | 2h 15m |
| 2026-04-20 | CSN8355 | - | Apr 20, 01:35 UTC | Apr 20, 04:05 UTC | 2h 30m |
| 2026-04-19 | CSN8355 | - | Apr 19, 07:30 UTC | Apr 20, 04:05 UTC | 20h 35m |
| 2026-04-19 | CSN8355 | - | Apr 19, 05:40 UTC | Apr 20, 04:05 UTC | 22h 25m |
| 2026-04-19 | CSN8355 | - | Apr 19, 02:35 UTC | Apr 20, 01:55 UTC | 23h 20m |
| 2026-04-19 | CSN5153 | - | Apr 19, 02:20 UTC | Apr 19, 07:45 UTC | 5h 25m |
| 2026-04-17 | CSN3876 | SZX → YIW | Apr 17, 03:05 UTC | Apr 17, 03:15 UTC | 10m |
| 2026-04-17 | CSN3875 | YIW → SZX | Apr 17, 00:44 UTC | Apr 17, 01:04 UTC | 20m |
| 2026-04-16 | CSN6704 | ZUH → YIW | Apr 16, 08:24 UTC | Apr 16, 08:40 UTC | 15m |
| 2026-04-16 | CSN6703 | YIW → ZUH | Apr 16, 00:45 UTC | Apr 16, 01:00 UTC | 15m |
| 2026-04-14 | CSN6704 | ZUH → YIW | Apr 14, 08:50 UTC | Apr 14, 09:00 UTC | 10m |
| 2026-04-13 | CSN8521 | - | Apr 13, 03:45 UTC | Apr 13, 04:15 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-5746 page for operator, model, and routing details .