sensors Mode-S transponder
781C16
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-325D · AIRBUS A-320neo
- Hex
- 781C16
- Octal
- 36016026
- Decimal
- 7,871,510
- Country
- CN
- Tail
- B-325D
- Type
- A20N
- Flights observed
- 78
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 29m ago
Last known position
Country allocation
The ICAO 24-bit address 781C16 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 |
|---|---|---|---|
| CSN5049 | - | 20 | 2026-07-14 |
| CSN5050 | - | 19 | 2026-07-14 |
| CSN8360 | - | 4 | 2026-07-11 |
| CSN6929 | - | 4 | 2026-06-29 |
| CSN3066 | - | 3 | 2026-06-23 |
| CSN3065 | - | 3 | 2026-06-23 |
| CSN8523 | - | 2 | 2026-07-08 |
| CSN8359 | - | 2 | 2026-06-28 |
| CSN6930 | - | 2 | 2026-06-30 |
| CSN5588 | China Southern Airlines | 2 | 2026-05-23 |
| CSN5587 | China Southern Airlines | 2 | 2026-05-23 |
| CSN5114 | China Southern Airlines | 2 | 2026-06-06 |
| CSN5113 | China Southern Airlines | 2 | 2026-06-11 |
| CSN3812 | - | 2 | 2026-04-23 |
| CSN5807 | - | 1 | 2026-06-22 |
| CSN5563 | - | 1 | 2026-05-04 |
| CSN5470 | China Southern Airlines | 1 | 2026-05-24 |
| CSN3811 | - | 1 | 2026-04-23 |
| CSN3770 | - | 1 | 2026-05-23 |
| CSN3501 | China Southern Airlines | 1 | 2026-05-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | CSN5050 | - | Jul 14, 19:05 UTC | Jul 14, 19:20 UTC | 15m |
| 2026-07-14 | CSN5049 | - | Jul 14, 15:00 UTC | Jul 14, 17:45 UTC | 2h 45m |
| 2026-07-11 | CSN8360 | - | Jul 11, 14:20 UTC | Jul 11, 14:35 UTC | 15m |
| 2026-07-10 | CSN5050 | - | Jul 10, 19:05 UTC | Jul 11, 03:10 UTC | 8h 5m |
| 2026-07-10 | CSN5049 | - | Jul 10, 14:15 UTC | Jul 10, 17:30 UTC | 3h 15m |
| 2026-07-08 | CSN8523 | - | Jul 8, 12:05 UTC | Jul 9, 02:25 UTC | 14h 20m |
| 2026-07-07 | CSN5050 | - | Jul 7, 21:50 UTC | Jul 8, 12:30 UTC | 14h 40m |
| 2026-07-07 | CSN5049 | - | Jul 7, 20:15 UTC | Jul 7, 20:30 UTC | 15m |
| 2026-07-07 | CSN5049 | - | Jul 7, 13:10 UTC | Jul 7, 18:10 UTC | 5h 0m |
| 2026-07-06 | CSN8523 | - | Jul 6, 11:10 UTC | Jul 6, 11:20 UTC | 10m |
| 2026-07-01 | CSN5050 | - | Jul 1, 19:10 UTC | Jul 2, 09:40 UTC | 14h 30m |
| 2026-07-01 | CSN5049 | - | Jul 1, 14:15 UTC | Jul 1, 17:40 UTC | 3h 25m |
| 2026-06-30 | CSN6930 | - | Jun 30, 09:00 UTC | Jun 30, 13:30 UTC | 4h 30m |
| 2026-06-29 | CSN6929 | - | Jun 29, 13:00 UTC | Jun 30, 09:15 UTC | 20h 16m |
| 2026-06-29 | CSN6929 | - | Jun 29, 09:00 UTC | Jun 29, 13:09 UTC | 4h 10m |
| 2026-06-28 | CSN8360 | - | Jun 28, 16:05 UTC | Jun 29, 13:09 UTC | 21h 5m |
| 2026-06-28 | CSN8359 | - | Jun 28, 11:59 UTC | Jun 28, 12:55 UTC | 55m |
| 2026-06-25 | CSN6930 | - | Jun 25, 13:00 UTC | Jun 25, 13:09 UTC | 10m |
| 2026-06-25 | CSN6929 | - | Jun 25, 08:50 UTC | Jun 25, 09:10 UTC | 20m |
| 2026-06-24 | CSN6929 | - | Jun 24, 09:00 UTC | Jun 24, 13:24 UTC | 4h 25m |
| 2026-06-23 | CSN8360 | HAN → CSX | Jun 23, 14:25 UTC | Jun 24, 13:24 UTC | 23h 0m |
| 2026-06-23 | CSN3066 | - | Jun 23, 05:20 UTC | Jun 23, 12:29 UTC | 7h 10m |
| 2026-06-23 | CSN3065 | - | Jun 23, 02:34 UTC | Jun 23, 03:15 UTC | 40m |
| 2026-06-22 | CSN5807 | - | Jun 22, 03:10 UTC | Jun 22, 03:24 UTC | 15m |
| 2026-06-12 | CSN5050 | KUL → CSX | Jun 12, 08:00 UTC | Jun 12, 11:05 UTC | 3h 5m |
| 2026-06-12 | CSN5049 | - | Jun 12, 02:55 UTC | Jun 12, 06:15 UTC | 3h 20m |
| 2026-06-11 | CSN5113 | CSX → SYX | Jun 11, 01:40 UTC | Jun 11, 01:55 UTC | 15m |
| 2026-06-09 | CSN3066 | ICN → CSX | Jun 9, 04:55 UTC | Jun 9, 05:25 UTC | 30m |
| 2026-06-09 | CSN3065 | CSX → ICN | Jun 9, 02:30 UTC | Jun 9, 03:05 UTC | 35m |
| 2026-06-06 | CSN5114 | SYX → CSX | Jun 6, 04:25 UTC | Jun 7, 02:50 UTC | 22h 25m |
| 2026-06-05 | CSN5114 | SYX → CSX | Jun 5, 09:40 UTC | Jun 6, 04:40 UTC | 19h 0m |
| 2026-06-04 | CSN5113 | CSX → SYX | Jun 4, 01:50 UTC | Jun 4, 02:05 UTC | 15m |
| 2026-06-01 | CSN5050 | KUL → CSX | Jun 1, 19:10 UTC | Jun 1, 22:10 UTC | 3h 0m |
| 2026-06-01 | CSN5049 | CSX → KUL | Jun 1, 14:25 UTC | Jun 1, 17:25 UTC | 3h 0m |
| 2026-05-31 | CSN8360 | HAN → CSX | May 31, 14:20 UTC | May 31, 14:45 UTC | 25m |
| 2026-05-31 | CSN8359 | CSX → HAN | May 31, 12:25 UTC | May 31, 12:55 UTC | 30m |
| 2026-05-30 | CSN5050 | KUL → CSX | May 30, 21:45 UTC | May 30, 22:15 UTC | 30m |
| 2026-05-30 | CSN5050 | KUL → CSX | May 30, 19:15 UTC | May 30, 19:30 UTC | 15m |
| 2026-05-30 | CSN5049 | CSX → KUL | May 30, 17:10 UTC | May 30, 17:25 UTC | 15m |
| 2026-05-30 | CSN5049 | CSX → KUL | May 30, 14:35 UTC | May 30, 15:10 UTC | 35m |
| 2026-05-27 | CSN5050 | KUL → CSX | May 27, 21:25 UTC | May 27, 22:00 UTC | 35m |
| 2026-05-27 | CSN5050 | KUL → CSX | May 27, 19:05 UTC | May 27, 19:20 UTC | 15m |
| 2026-05-27 | CSN5049 | CSX → KUL | May 27, 14:10 UTC | May 27, 17:30 UTC | 3h 20m |
| 2026-05-25 | CSN3501 | CAN → HGH | May 25, 07:25 UTC | May 25, 07:35 UTC | 10m |
| 2026-05-24 | CSN5470 | CGQ → HGH | May 24, 06:10 UTC | May 24, 06:45 UTC | 35m |
| 2026-05-23 | CSN5588 | ZUH → HGH | May 23, 12:15 UTC | May 23, 12:30 UTC | 15m |
| 2026-05-23 | CSN5587 | HGH → ZUH | May 23, 10:55 UTC | May 23, 11:10 UTC | 15m |
| 2026-05-23 | CSN3770 | - | May 23, 01:05 UTC | May 23, 01:15 UTC | 10m |
| 2026-05-19 | CSN5050 | KUL → CSX | May 19, 22:35 UTC | May 19, 22:55 UTC | 20m |
| 2026-05-19 | CSN5050 | KUL → CSX | May 19, 19:10 UTC | May 19, 19:25 UTC | 15m |
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-325D page for operator, model, and routing details .