sensors Mode-S transponder
7809E4
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-5740 · BOEING 737-800
- Hex
- 7809E4
- Octal
- 36004744
- Decimal
- 7,866,852
- Country
- CN
- Tail
- B-5740
- Type
- B738
- Flights observed
- 52
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 12h ago
Last known position
Country allocation
The ICAO 24-bit address 7809E4 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 |
|---|---|---|---|
| CSN6704 | China Southern Airlines | 7 | 2026-05-28 |
| CSN6703 | China Southern Airlines | 5 | 2026-05-28 |
| CSN8356 | - | 4 | 2026-06-02 |
| CSN8355 | - | 4 | 2026-06-02 |
| CSN3852 | - | 4 | 2026-05-27 |
| CSN3857 | - | 3 | 2026-05-22 |
| CSN8539 | - | 2 | 2026-05-24 |
| CSN6195 | - | 2 | 2026-04-27 |
| CSN3883 | China Southern Airlines | 2 | 2026-05-14 |
| CSN3876 | China Southern Airlines | 2 | 2026-05-29 |
| CSN3875 | China Southern Airlines | 2 | 2026-05-29 |
| CSN8521 | China Southern Airlines | 1 | 2026-05-18 |
| CSN6741 | China Southern Airlines | 1 | 2026-04-20 |
| CSN6655 | China Southern Airlines | 1 | 2026-04-23 |
| CSN6196 | - | 1 | 2026-04-30 |
| CSN5888 | - | 1 | 2026-04-29 |
| CSN5887 | - | 1 | 2026-04-29 |
| CSN5729 | - | 1 | 2026-04-19 |
| CSN5153 | - | 1 | 2026-05-03 |
| CSN5147 | China Southern Airlines | 1 | 2026-05-20 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | CSN8356 | - | Jun 2, 05:25 UTC | Jun 2, 07:50 UTC | 2h 25m |
| 2026-06-02 | CSN8355 | - | Jun 2, 01:20 UTC | Jun 2, 03:45 UTC | 2h 25m |
| 2026-05-30 | CSN8356 | - | May 30, 05:30 UTC | May 30, 08:00 UTC | 2h 30m |
| 2026-05-30 | CSN8355 | - | May 30, 01:05 UTC | May 30, 03:40 UTC | 2h 35m |
| 2026-05-29 | - | - | May 29, 16:15 UTC | May 29, 16:25 UTC | 10m |
| 2026-05-29 | CSN3876 | SZX → YIW | May 29, 03:35 UTC | May 29, 08:45 UTC | 5h 10m |
| 2026-05-29 | CSN3875 | YIW → SZX | May 29, 00:25 UTC | May 29, 00:45 UTC | 20m |
| 2026-05-28 | CSN6704 | ZUH → YIW | May 28, 08:50 UTC | May 28, 09:00 UTC | 10m |
| 2026-05-28 | CSN6703 | YIW → ZUH | May 28, 00:50 UTC | May 28, 01:05 UTC | 15m |
| 2026-05-27 | CSN3852 | - | May 27, 06:49 UTC | May 27, 07:05 UTC | 16m |
| 2026-05-25 | CSN6704 | ZUH → YIW | May 25, 08:30 UTC | May 25, 08:45 UTC | 15m |
| 2026-05-24 | CSN8539 | - | May 24, 06:45 UTC | May 24, 11:55 UTC | 5h 10m |
| 2026-05-24 | CSN5115 | - | May 24, 00:10 UTC | May 24, 00:20 UTC | 10m |
| 2026-05-22 | CSN3857 | - | May 22, 23:40 UTC | May 23, 05:00 UTC | 5h 19m |
| 2026-05-20 | CSN5147 | YIW → HAK | May 20, 08:20 UTC | May 20, 11:35 UTC | 3h 15m |
| 2026-05-19 | CSN6704 | ZUH → YIW | May 19, 08:35 UTC | May 19, 08:45 UTC | 10m |
| 2026-05-19 | CSN6703 | YIW → ZUH | May 19, 02:35 UTC | May 19, 02:45 UTC | 10m |
| 2026-05-19 | CSN6703 | YIW → ZUH | May 19, 00:50 UTC | May 19, 01:10 UTC | 20m |
| 2026-05-18 | CSN8521 | SHE → YIW | May 18, 03:35 UTC | May 18, 04:05 UTC | 30m |
| 2026-05-16 | CSN6704 | ZUH → YIW | May 16, 08:46 UTC | May 16, 08:55 UTC | 10m |
| 2026-05-16 | CSN6703 | YIW → ZUH | May 16, 00:55 UTC | May 16, 01:05 UTC | 10m |
| 2026-05-14 | CSN3883 | CAN → YIW | May 14, 05:25 UTC | May 14, 05:40 UTC | 15m |
| 2026-05-13 | - | - | May 13, 04:10 UTC | May 13, 04:25 UTC | 15m |
| 2026-05-11 | CSN3825 | WUH → TAO | May 11, 07:20 UTC | May 11, 16:05 UTC | 8h 45m |
| 2026-05-09 | CSN6704 | ZUH → YIW | May 9, 08:30 UTC | May 9, 08:40 UTC | 10m |
| 2026-05-09 | CSN6703 | YIW → ZUH | May 9, 00:50 UTC | May 9, 01:05 UTC | 15m |
| 2026-05-08 | CSN6704 | ZUH → YIW | May 8, 09:59 UTC | May 8, 10:09 UTC | 10m |
| 2026-05-07 | CSN6704 | ZUH → YIW | May 7, 09:50 UTC | May 7, 10:00 UTC | 10m |
| 2026-05-05 | CSN3876 | SZX → YIW | May 5, 03:05 UTC | May 5, 03:15 UTC | 10m |
| 2026-05-05 | CSN3875 | YIW → SZX | May 5, 00:35 UTC | May 5, 01:00 UTC | 25m |
| 2026-05-03 | CSN5153 | - | May 3, 02:15 UTC | May 3, 05:20 UTC | 3h 4m |
| 2026-04-30 | CSN6196 | - | Apr 30, 09:20 UTC | May 1, 03:40 UTC | 18h 20m |
| 2026-04-29 | CSN5888 | - | Apr 29, 13:25 UTC | Apr 30, 03:30 UTC | 14h 5m |
| 2026-04-29 | CSN5887 | - | Apr 29, 10:45 UTC | Apr 29, 11:05 UTC | 20m |
| 2026-04-27 | CSN6195 | - | Apr 27, 23:55 UTC | Apr 28, 09:30 UTC | 9h 35m |
| 2026-04-27 | CSN3883 | CAN → YIW | Apr 27, 03:35 UTC | Apr 27, 03:45 UTC | 10m |
| 2026-04-27 | CSN3796 | YIW → CAN | Apr 27, 01:15 UTC | Apr 27, 01:25 UTC | 10m |
| 2026-04-26 | CSN8539 | - | Apr 26, 07:10 UTC | Apr 26, 12:45 UTC | 5h 35m |
| 2026-04-25 | CSN3857 | - | Apr 25, 23:45 UTC | Apr 26, 04:50 UTC | 5h 5m |
| 2026-04-25 | CSN3857 | - | Apr 25, 01:30 UTC | Apr 26, 00:05 UTC | 22h 35m |
| 2026-04-24 | CSN3852 | - | Apr 24, 07:05 UTC | Apr 25, 01:30 UTC | 18h 25m |
| 2026-04-24 | CSN3852 | - | Apr 24, 06:50 UTC | Apr 25, 01:30 UTC | 18h 40m |
| 2026-04-24 | CSN3852 | - | Apr 24, 03:25 UTC | Apr 25, 01:30 UTC | 22h 5m |
| 2026-04-23 | CSN6655 | YIW → TSN | Apr 23, 07:15 UTC | Apr 23, 07:30 UTC | 15m |
| 2026-04-22 | CSN5107 | - | Apr 22, 06:10 UTC | Apr 22, 06:30 UTC | 20m |
| 2026-04-20 | CSN6741 | SYX → CAN | Apr 20, 10:05 UTC | Apr 20, 14:00 UTC | 3h 55m |
| 2026-04-19 | CSN5729 | - | Apr 19, 01:05 UTC | Apr 19, 05:35 UTC | 4h 30m |
| 2026-04-16 | CSN6195 | - | Apr 16, 23:45 UTC | Apr 16, 23:55 UTC | 10m |
| 2026-04-15 | CSN8356 | - | Apr 15, 07:20 UTC | Apr 15, 07:35 UTC | 15m |
| 2026-04-15 | CSN8356 | - | Apr 15, 05:20 UTC | Apr 15, 05:55 UTC | 35m |
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-5740 page for operator, model, and routing details .