sensors Mode-S transponder
7820EB
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-656W · COMAC ARJ-21-700 Xiangfeng
- Hex
- 7820EB
- Octal
- 36020353
- Decimal
- 7,872,747
- Country
- CN
- Tail
- B-656W
- Type
- AJ27
- Flights observed
- 17
- Distinct callsigns
- 8
- Country
- CN
- Last broadcast
- 11d ago
Last known position
Country allocation
The ICAO 24-bit address 7820EB 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 8 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN5137 | China Southern Airlines | 4 | 2026-05-10 |
| CSN6195 | - | 3 | 2026-05-05 |
| CSN6196 | - | 2 | 2026-05-14 |
| CSN5775 | China Southern Airlines | 2 | 2026-05-20 |
| CSN3865 | - | 2 | 2026-05-22 |
| CSN8540 | - | 1 | 2026-04-18 |
| CSN5183 | - | 1 | 2026-05-08 |
| CSN3825 | China Southern Airlines | 1 | 2026-05-03 |
Recent flights last 17
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-22 | CSN3865 | - | May 22, 01:35 UTC | May 22, 06:45 UTC | 5h 10m |
| 2026-05-20 | CSN5775 | PVG → TFU | May 20, 02:45 UTC | May 20, 08:00 UTC | 5h 16m |
| 2026-05-14 | CSN6196 | - | May 14, 23:55 UTC | May 15, 03:40 UTC | 3h 45m |
| 2026-05-14 | CSN6196 | - | May 14, 07:45 UTC | May 15, 03:40 UTC | 19h 55m |
| 2026-05-10 | CSN5137 | SYX → URC | May 10, 11:45 UTC | May 11, 01:15 UTC | 13h 30m |
| 2026-05-08 | CSN5183 | - | May 8, 07:34 UTC | May 8, 12:00 UTC | 4h 25m |
| 2026-05-05 | CSN6195 | - | May 5, 23:40 UTC | May 6, 03:30 UTC | 3h 50m |
| 2026-05-03 | CSN3825 | WUH → TAO | May 3, 07:55 UTC | May 3, 08:05 UTC | 10m |
| 2026-04-29 | CSN5775 | PVG → TFU | Apr 29, 03:15 UTC | Apr 29, 12:40 UTC | 9h 26m |
| 2026-04-23 | CSN5137 | SYX → URC | Apr 23, 11:55 UTC | Apr 23, 15:05 UTC | 3h 10m |
| 2026-04-23 | - | - | Apr 23, 02:55 UTC | Apr 23, 03:30 UTC | 35m |
| 2026-04-19 | CSN6195 | - | Apr 19, 23:35 UTC | Apr 20, 03:35 UTC | 4h 0m |
| 2026-04-19 | CSN6195 | - | Apr 19, 06:10 UTC | Apr 20, 03:35 UTC | 21h 25m |
| 2026-04-19 | CSN3865 | - | Apr 19, 00:50 UTC | Apr 19, 23:45 UTC | 22h 55m |
| 2026-04-18 | CSN8540 | - | Apr 18, 06:45 UTC | Apr 18, 11:55 UTC | 5h 10m |
| 2026-04-13 | CSN5137 | - | Apr 13, 11:55 UTC | Apr 13, 12:05 UTC | 10m |
| 2026-04-13 | CSN5137 | - | Apr 13, 11:40 UTC | Apr 13, 12:05 UTC | 25m |
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-656W page for operator, model, and routing details .