sensors Mode-S transponder
781623
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-306M · AIRBUS A-320neo
- Hex
- 781623
- Octal
- 36013043
- Decimal
- 7,869,987
- Country
- CN
- Tail
- B-306M
- Type
- A20N
- Flights observed
- 54
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 781623 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 |
|---|---|---|---|
| CSN3605 | China Southern Airlines | 6 | 2026-05-01 |
| CSN6341 | China Southern Airlines | 4 | 2026-06-04 |
| CSN6074 | China Southern Airlines | 4 | 2026-05-23 |
| CSN6073 | China Southern Airlines | 4 | 2026-06-01 |
| CSN688 | China Southern Airlines | 3 | 2026-05-24 |
| CSN6851 | China Southern Airlines | 3 | 2026-05-20 |
| CSN6545 | China Southern Airlines | 3 | 2026-04-23 |
| CSN638 | China Southern Airlines | 3 | 2026-06-02 |
| CSN637 | China Southern Airlines | 3 | 2026-06-01 |
| CSN6852 | China Southern Airlines | 2 | 2026-05-06 |
| CSN6442 | China Southern Airlines | 2 | 2026-04-24 |
| CSN6358 | China Southern Airlines | 2 | 2026-04-26 |
| CSN6357 | China Southern Airlines | 2 | 2026-04-26 |
| CSN6168 | China Southern Airlines | 2 | 2026-06-02 |
| CSN6146 | China Southern Airlines | 2 | 2026-04-27 |
| CSN8460 | China Southern Airlines | 1 | 2026-05-26 |
| CSN687 | China Southern Airlines | 1 | 2026-05-23 |
| CSN6405 | China Southern Airlines | 1 | 2026-04-23 |
| CSN6378 | China Southern Airlines | 1 | 2026-04-22 |
| CSN6342 | China Southern Airlines | 1 | 2026-06-05 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-05 | CSN6342 | CAN → CGQ | Jun 5, 08:25 UTC | Jun 5, 08:45 UTC | 20m |
| 2026-06-04 | CSN6341 | CGQ → CAN | Jun 4, 07:20 UTC | Jun 5, 01:30 UTC | 18h 10m |
| 2026-06-02 | CSN6168 | PKX → CGQ | Jun 2, 12:40 UTC | Jun 2, 13:00 UTC | 20m |
| 2026-06-02 | CSN638 | ICN → CGQ | Jun 2, 05:35 UTC | Jun 2, 05:55 UTC | 20m |
| 2026-06-01 | CSN6073 | YNJ → ICN | Jun 1, 10:30 UTC | Jun 2, 04:05 UTC | 17h 35m |
| 2026-06-01 | CSN637 | CGQ → ICN | Jun 1, 08:30 UTC | Jun 1, 08:55 UTC | 25m |
| 2026-05-28 | CSN6341 | CGQ → CAN | May 28, 01:15 UTC | May 28, 08:25 UTC | 7h 10m |
| 2026-05-27 | CSN6341 | CGQ → CAN | May 27, 12:40 UTC | May 28, 08:25 UTC | 19h 45m |
| 2026-05-26 | CSN8460 | CAN → CGQ | May 26, 10:44 UTC | May 26, 11:00 UTC | 15m |
| 2026-05-26 | CSN3813 | CAN → HFE | May 26, 02:29 UTC | May 26, 02:39 UTC | 10m |
| 2026-05-24 | CSN688 | ICN → CGQ | May 24, 05:40 UTC | May 24, 06:00 UTC | 20m |
| 2026-05-24 | CSN6073 | YNJ → ICN | May 24, 03:35 UTC | May 24, 03:55 UTC | 20m |
| 2026-05-23 | CSN6074 | ICN → YNJ | May 23, 04:50 UTC | May 23, 05:20 UTC | 30m |
| 2026-05-23 | CSN687 | CGQ → ICN | May 23, 02:15 UTC | May 23, 02:35 UTC | 19m |
| 2026-05-20 | CSN6851 | CGQ → CAN | May 20, 03:40 UTC | May 20, 14:40 UTC | 11h 1m |
| 2026-05-19 | CSN6851 | CGQ → CAN | May 19, 12:50 UTC | May 20, 07:50 UTC | 19h 1m |
| 2026-05-19 | CSN6851 | CGQ → CAN | May 19, 12:30 UTC | May 20, 07:50 UTC | 19h 21m |
| 2026-05-19 | CSN6341 | CGQ → CAN | May 19, 01:20 UTC | May 19, 12:55 UTC | 11h 35m |
| 2026-05-17 | CSN6194 | PKX → CGQ | May 17, 09:55 UTC | May 17, 10:10 UTC | 15m |
| 2026-05-10 | CSN688 | ICN → CGQ | May 10, 05:45 UTC | May 10, 06:00 UTC | 15m |
| 2026-05-09 | CSN6074 | ICN → YNJ | May 9, 04:50 UTC | May 9, 05:00 UTC | 10m |
| 2026-05-08 | CSN6168 | PKX → CGQ | May 8, 12:39 UTC | May 8, 12:49 UTC | 10m |
| 2026-05-08 | CSN688 | ICN → CGQ | May 8, 05:54 UTC | May 8, 06:04 UTC | 10m |
| 2026-05-08 | CSN6073 | YNJ → ICN | May 8, 04:04 UTC | May 8, 04:09 UTC | 5m |
| 2026-05-07 | CSN6074 | ICN → YNJ | May 7, 05:05 UTC | May 7, 05:20 UTC | 15m |
| 2026-05-06 | CSN6852 | CAN → CGQ | May 6, 14:25 UTC | May 7, 01:40 UTC | 11h 14m |
| 2026-05-01 | CSN3605 | CGQ → CAN | May 1, 10:50 UTC | May 2, 03:25 UTC | 16h 35m |
| 2026-05-01 | CSN3605 | CGQ → CAN | May 1, 03:05 UTC | May 1, 11:10 UTC | 8h 5m |
| 2026-04-30 | CSN3605 | CGQ → CAN | Apr 30, 11:05 UTC | May 1, 03:30 UTC | 16h 25m |
| 2026-04-30 | CSN3605 | CGQ → CAN | Apr 30, 03:00 UTC | Apr 30, 11:20 UTC | 8h 20m |
| 2026-04-29 | CSN3605 | CGQ → CAN | Apr 29, 10:30 UTC | Apr 30, 03:20 UTC | 16h 49m |
| 2026-04-29 | CSN637 | CGQ → ICN | Apr 29, 08:40 UTC | Apr 29, 09:00 UTC | 21m |
| 2026-04-28 | CSN638 | ICN → CGQ | Apr 28, 05:40 UTC | Apr 28, 06:00 UTC | 20m |
| 2026-04-28 | CSN6073 | YNJ → ICN | Apr 28, 03:55 UTC | Apr 28, 04:05 UTC | 10m |
| 2026-04-27 | CSN6074 | ICN → YNJ | Apr 27, 10:40 UTC | Apr 27, 11:00 UTC | 20m |
| 2026-04-27 | CSN637 | CGQ → ICN | Apr 27, 08:40 UTC | Apr 27, 08:55 UTC | 15m |
| 2026-04-27 | CSN6146 | PKX → CGQ | Apr 27, 04:05 UTC | Apr 27, 08:00 UTC | 3h 55m |
| 2026-04-26 | CSN6358 | SZX → CGQ | Apr 26, 09:00 UTC | Apr 26, 09:20 UTC | 20m |
| 2026-04-26 | CSN6358 | SZX → CGQ | Apr 26, 06:25 UTC | Apr 26, 06:40 UTC | 15m |
| 2026-04-26 | CSN6357 | CGQ → SZX | Apr 26, 04:10 UTC | Apr 26, 04:30 UTC | 20m |
| 2026-04-26 | CSN6357 | CGQ → SZX | Apr 26, 01:45 UTC | Apr 26, 02:00 UTC | 15m |
| 2026-04-25 | CSN638 | ICN → CGQ | Apr 25, 05:40 UTC | Apr 26, 02:00 UTC | 20h 20m |
| 2026-04-24 | CSN6442 | TFU → CGQ | Apr 24, 08:50 UTC | Apr 25, 03:05 UTC | 18h 15m |
| 2026-04-24 | CSN6442 | TFU → CGQ | Apr 24, 08:40 UTC | Apr 25, 03:05 UTC | 18h 25m |
| 2026-04-23 | CSN6405 | CGQ → HGH | Apr 23, 09:10 UTC | Apr 24, 08:45 UTC | 23h 35m |
| 2026-04-23 | CSN6545 | CGQ → HGH | Apr 23, 00:10 UTC | Apr 23, 09:15 UTC | 9h 5m |
| 2026-04-22 | CSN6545 | CGQ → HGH | Apr 22, 14:30 UTC | Apr 23, 09:15 UTC | 18h 45m |
| 2026-04-22 | CSN6545 | CGQ → HGH | Apr 22, 07:30 UTC | Apr 23, 00:40 UTC | 17h 10m |
| 2026-04-22 | CSN6378 | CAN → CGQ | Apr 22, 03:40 UTC | Apr 23, 00:40 UTC | 21h 0m |
| 2026-04-22 | - | - | Apr 22, 01:20 UTC | Apr 22, 01:30 UTC | 10m |
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-306M page for operator, model, and routing details .