sensors Mode-S transponder
782161
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-657N · COMAC ARJ-21-700 Xiangfeng
- Hex
- 782161
- Octal
- 36020541
- Decimal
- 7,872,865
- Country
- CN
- Tail
- B-657N
- Type
- AJ27
- Flights observed
- 81
- Distinct callsigns
- 11
- Country
- CN
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 782161 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN5153 | - | 26 | 2026-05-28 |
| CSN5154 | - | 20 | 2026-06-01 |
| CSN5887 | - | 18 | 2026-05-29 |
| CSN5888 | - | 10 | 2026-05-24 |
| CSN5915 | - | 1 | 2026-05-21 |
| CSN5137 | China Southern Airlines | 1 | 2026-05-12 |
| CSN3894 | - | 1 | 2026-05-03 |
| CSN3865 | - | 1 | 2026-05-31 |
| CSN3860 | - | 1 | 2026-05-29 |
| CSN3859 | - | 1 | 2026-05-29 |
| CSN3825 | China Southern Airlines | 1 | 2026-06-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-01 | CSN3825 | WUH → TAO | Jun 1, 07:25 UTC | Jun 1, 07:40 UTC | 15m |
| 2026-06-01 | CSN5154 | - | Jun 1, 02:25 UTC | Jun 1, 05:45 UTC | 3h 20m |
| 2026-05-31 | CSN3865 | - | May 31, 00:35 UTC | May 31, 00:55 UTC | 20m |
| 2026-05-30 | CSN5154 | - | May 30, 02:15 UTC | May 30, 05:50 UTC | 3h 35m |
| 2026-05-29 | CSN5887 | - | May 29, 09:10 UTC | May 29, 13:00 UTC | 3h 50m |
| 2026-05-29 | CSN3860 | - | May 29, 05:25 UTC | May 29, 05:45 UTC | 20m |
| 2026-05-29 | CSN3859 | - | May 29, 00:15 UTC | May 29, 00:30 UTC | 15m |
| 2026-05-28 | CSN5153 | - | May 28, 02:25 UTC | May 28, 05:35 UTC | 3h 10m |
| 2026-05-26 | CSN5154 | - | May 26, 05:30 UTC | May 26, 05:49 UTC | 20m |
| 2026-05-26 | CSN5153 | - | May 26, 02:55 UTC | May 26, 03:15 UTC | 20m |
| 2026-05-24 | CSN5888 | - | May 24, 12:20 UTC | May 24, 12:35 UTC | 15m |
| 2026-05-24 | CSN5887 | - | May 24, 09:15 UTC | May 24, 09:40 UTC | 25m |
| 2026-05-22 | CSN5888 | - | May 22, 12:50 UTC | May 23, 05:35 UTC | 16h 44m |
| 2026-05-22 | CSN5887 | - | May 22, 09:25 UTC | May 23, 05:35 UTC | 20h 10m |
| 2026-05-22 | CSN5153 | - | May 22, 02:45 UTC | May 22, 06:05 UTC | 3h 20m |
| 2026-05-21 | CSN5915 | - | May 21, 09:10 UTC | May 21, 09:30 UTC | 20m |
| 2026-05-21 | CSN5153 | - | May 21, 02:25 UTC | May 21, 05:40 UTC | 3h 15m |
| 2026-05-20 | CSN5154 | - | May 20, 05:15 UTC | May 20, 05:40 UTC | 25m |
| 2026-05-20 | CSN5153 | - | May 20, 02:25 UTC | May 20, 02:45 UTC | 20m |
| 2026-05-17 | CSN5153 | - | May 17, 12:15 UTC | May 18, 05:35 UTC | 17h 20m |
| 2026-05-17 | CSN5887 | - | May 17, 09:30 UTC | May 17, 09:45 UTC | 15m |
| 2026-05-16 | CSN5154 | - | May 16, 06:20 UTC | May 16, 06:41 UTC | 20m |
| 2026-05-16 | CSN5153 | - | May 16, 03:25 UTC | May 16, 03:55 UTC | 30m |
| 2026-05-15 | CSN5887 | - | May 15, 09:25 UTC | May 15, 12:40 UTC | 3h 15m |
| 2026-05-15 | CSN5153 | - | May 15, 02:30 UTC | May 15, 03:00 UTC | 30m |
| 2026-05-14 | CSN5154 | - | May 14, 05:35 UTC | May 14, 05:45 UTC | 10m |
| 2026-05-14 | CSN5153 | - | May 14, 02:40 UTC | May 14, 03:05 UTC | 25m |
| 2026-05-13 | CSN5153 | - | May 13, 02:30 UTC | May 13, 05:40 UTC | 3h 10m |
| 2026-05-12 | CSN5137 | SYX → URC | May 12, 02:45 UTC | May 12, 15:01 UTC | 12h 15m |
| 2026-05-11 | CSN5153 | - | May 11, 05:25 UTC | May 12, 03:05 UTC | 21h 41m |
| 2026-05-11 | CSN5153 | - | May 11, 02:25 UTC | May 11, 05:40 UTC | 3h 15m |
| 2026-05-10 | CSN5154 | - | May 10, 05:25 UTC | May 10, 05:45 UTC | 20m |
| 2026-05-10 | CSN5153 | - | May 10, 02:24 UTC | May 10, 02:55 UTC | 30m |
| 2026-05-08 | CSN5153 | - | May 8, 12:25 UTC | May 9, 05:55 UTC | 17h 30m |
| 2026-05-08 | CSN5887 | - | May 8, 09:19 UTC | May 9, 05:55 UTC | 20h 35m |
| 2026-05-08 | CSN5154 | - | May 8, 02:24 UTC | May 8, 06:04 UTC | 3h 40m |
| 2026-05-06 | CSN5888 | - | May 6, 12:10 UTC | May 6, 12:30 UTC | 20m |
| 2026-05-06 | CSN5153 | - | May 6, 02:25 UTC | May 6, 09:40 UTC | 7h 15m |
| 2026-05-05 | CSN5153 | - | May 5, 12:20 UTC | May 6, 09:40 UTC | 21h 20m |
| 2026-05-05 | CSN5887 | - | May 5, 09:30 UTC | May 6, 05:30 UTC | 20h 0m |
| 2026-05-05 | CSN5154 | - | May 5, 05:15 UTC | May 5, 05:30 UTC | 15m |
| 2026-05-04 | CSN5887 | - | May 4, 09:20 UTC | May 5, 02:50 UTC | 17h 31m |
| 2026-05-04 | CSN5887 | - | May 4, 06:45 UTC | May 5, 02:50 UTC | 20h 6m |
| 2026-05-04 | CSN5887 | - | May 4, 02:30 UTC | May 4, 13:25 UTC | 10h 55m |
| 2026-05-03 | CSN3894 | - | May 3, 02:00 UTC | May 3, 02:25 UTC | 25m |
| 2026-05-02 | CSN5887 | - | May 2, 05:20 UTC | May 2, 12:25 UTC | 7h 5m |
| 2026-05-02 | CSN5153 | - | May 2, 02:15 UTC | May 2, 02:45 UTC | 30m |
| 2026-04-30 | CSN5154 | - | Apr 30, 12:20 UTC | May 1, 07:35 UTC | 19h 15m |
| 2026-04-30 | CSN5154 | - | Apr 30, 02:35 UTC | Apr 30, 09:55 UTC | 7h 20m |
| 2026-04-28 | CSN5888 | - | Apr 28, 13:30 UTC | Apr 29, 07:35 UTC | 18h 5m |
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-657N page for operator, model, and routing details .