sensors Mode-S transponder
781FFE
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32FW · AIRBUS A-320neo
- Hex
- 781FFE
- Octal
- 36017776
- Decimal
- 7,872,510
- Country
- CN
- Tail
- B-32FW
- Type
- A20N
- Flights observed
- 45
- Distinct callsigns
- 18
- Country
- CN
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 781FFE 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSN688 | China Southern Airlines | 6 | 2026-05-29 |
| CSN6074 | China Southern Airlines | 6 | 2026-05-28 |
| CSN8024 | China Southern Airlines | 4 | 2026-04-24 |
| CSN8023 | China Southern Airlines | 4 | 2026-04-24 |
| CSN687 | China Southern Airlines | 4 | 2026-05-30 |
| CSN638 | China Southern Airlines | 3 | 2026-05-04 |
| CSN6073 | China Southern Airlines | 3 | 2026-05-29 |
| CSN6341 | China Southern Airlines | 2 | 2026-04-27 |
| CSN6331 | China Southern Airlines | 2 | 2026-05-21 |
| CSN3606 | China Southern Airlines | 2 | 2026-04-25 |
| CSN323 | - | 2 | 2026-04-19 |
| CSN8460 | China Southern Airlines | 1 | 2026-05-25 |
| CSN8294 | China Southern Airlines | 1 | 2026-05-20 |
| CSN6545 | - | 1 | 2026-04-13 |
| CSN6405 | China Southern Airlines | 1 | 2026-04-13 |
| CSN6377 | China Southern Airlines | 1 | 2026-04-23 |
| CSN6358 | China Southern Airlines | 1 | 2026-04-22 |
| CSN3407 | China Southern Airlines | 1 | 2026-04-18 |
Recent flights last 45
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | CSN687 | CGQ → ICN | May 30, 02:20 UTC | May 30, 02:40 UTC | 20m |
| 2026-05-29 | CSN688 | ICN → CGQ | May 29, 06:10 UTC | May 29, 06:35 UTC | 25m |
| 2026-05-29 | CSN6073 | YNJ → ICN | May 29, 04:00 UTC | May 29, 04:20 UTC | 20m |
| 2026-05-28 | CSN6074 | ICN → YNJ | May 28, 04:45 UTC | May 28, 05:15 UTC | 30m |
| 2026-05-28 | CSN687 | CGQ → ICN | May 28, 02:35 UTC | May 28, 02:55 UTC | 20m |
| 2026-05-27 | CSN688 | ICN → CGQ | May 27, 06:20 UTC | May 27, 06:44 UTC | 25m |
| 2026-05-27 | CSN6073 | YNJ → ICN | May 27, 03:50 UTC | May 27, 04:09 UTC | 20m |
| 2026-05-26 | CSN6074 | ICN → YNJ | May 26, 04:35 UTC | May 26, 05:00 UTC | 25m |
| 2026-05-26 | CSN687 | CGQ → ICN | May 26, 02:29 UTC | May 26, 02:55 UTC | 25m |
| 2026-05-25 | CSN8460 | CAN → CGQ | May 25, 10:50 UTC | May 26, 01:55 UTC | 15h 5m |
| 2026-05-21 | CSN6331 | SHE → CAN | May 21, 03:40 UTC | May 21, 12:55 UTC | 9h 15m |
| 2026-05-20 | CSN8294 | NGB → CAN | May 20, 07:30 UTC | May 20, 07:40 UTC | 10m |
| 2026-05-19 | CSN6331 | SHE → CAN | May 19, 04:20 UTC | May 19, 12:45 UTC | 8h 25m |
| 2026-05-09 | CSN688 | ICN → CGQ | May 9, 05:45 UTC | May 9, 05:55 UTC | 10m |
| 2026-05-08 | CSN6074 | ICN → YNJ | May 8, 04:39 UTC | May 8, 04:49 UTC | 10m |
| 2026-05-06 | CSN688 | ICN → CGQ | May 6, 05:55 UTC | May 6, 06:10 UTC | 15m |
| 2026-05-05 | CSN6074 | ICN → YNJ | May 5, 10:35 UTC | May 6, 03:20 UTC | 16h 45m |
| 2026-05-05 | CSN688 | ICN → CGQ | May 5, 04:45 UTC | May 5, 05:00 UTC | 15m |
| 2026-05-04 | CSN638 | ICN → CGQ | May 4, 05:45 UTC | May 4, 05:55 UTC | 10m |
| 2026-05-03 | CSN6074 | ICN → YNJ | May 3, 10:35 UTC | May 3, 10:50 UTC | 15m |
| 2026-05-02 | CSN638 | ICN → CGQ | May 2, 05:45 UTC | May 2, 06:00 UTC | 15m |
| 2026-05-01 | CSN6074 | ICN → YNJ | May 1, 10:30 UTC | May 1, 10:40 UTC | 10m |
| 2026-05-01 | CSN688 | ICN → CGQ | May 1, 04:30 UTC | May 1, 04:50 UTC | 20m |
| 2026-05-01 | CSN687 | CGQ → ICN | May 1, 02:25 UTC | May 1, 02:35 UTC | 10m |
| 2026-04-29 | CSN638 | ICN → CGQ | Apr 29, 06:19 UTC | Apr 29, 06:29 UTC | 10m |
| 2026-04-29 | CSN6073 | YNJ → ICN | Apr 29, 03:34 UTC | Apr 29, 03:55 UTC | 20m |
| 2026-04-27 | CSN6341 | CGQ → CAN | Apr 27, 01:15 UTC | Apr 27, 12:50 UTC | 11h 35m |
| 2026-04-26 | CSN6341 | CGQ → CAN | Apr 26, 02:00 UTC | Apr 27, 01:30 UTC | 23h 30m |
| 2026-04-25 | CSN3606 | CAN → CGQ | Apr 25, 11:05 UTC | Apr 26, 02:00 UTC | 14h 55m |
| 2026-04-24 | CSN8024 | BKK → CAN | Apr 24, 12:45 UTC | Apr 25, 11:25 UTC | 22h 40m |
| 2026-04-24 | CSN8023 | CAN → BKK | Apr 24, 08:40 UTC | Apr 24, 11:20 UTC | 2h 40m |
| 2026-04-23 | CSN6377 | CGQ → CAN | Apr 23, 08:10 UTC | Apr 23, 12:55 UTC | 4h 45m |
| 2026-04-22 | CSN6358 | SZX → CGQ | Apr 22, 06:20 UTC | Apr 22, 08:55 UTC | 2h 35m |
| 2026-04-21 | CSN3606 | CAN → CGQ | Apr 21, 10:50 UTC | Apr 22, 01:55 UTC | 15h 5m |
| 2026-04-20 | CSN8024 | BKK → CAN | Apr 20, 11:35 UTC | Apr 21, 11:00 UTC | 23h 26m |
| 2026-04-20 | CSN8024 | BKK → CAN | Apr 20, 11:15 UTC | Apr 20, 11:55 UTC | 40m |
| 2026-04-20 | CSN8023 | CAN → BKK | Apr 20, 08:50 UTC | Apr 20, 09:45 UTC | 55m |
| 2026-04-19 | CSN323 | - | Apr 19, 14:20 UTC | Apr 19, 14:30 UTC | 10m |
| 2026-04-18 | CSN3407 | CAN → KMG | Apr 18, 06:10 UTC | Apr 18, 06:25 UTC | 15m |
| 2026-04-17 | CSN323 | - | Apr 17, 14:40 UTC | Apr 17, 14:50 UTC | 10m |
| 2026-04-16 | CSN8024 | BKK → CAN | Apr 16, 11:20 UTC | Apr 16, 11:49 UTC | 30m |
| 2026-04-16 | CSN8023 | CAN → BKK | Apr 16, 09:10 UTC | Apr 16, 09:35 UTC | 25m |
| 2026-04-16 | CSN8023 | CAN → BKK | Apr 16, 08:54 UTC | Apr 16, 09:05 UTC | 10m |
| 2026-04-13 | CSN6405 | CGQ → HGH | Apr 13, 08:50 UTC | Apr 13, 09:15 UTC | 25m |
| 2026-04-13 | CSN6545 | - | Apr 13, 00:20 UTC | Apr 13, 00:50 UTC | 30m |
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-32FW page for operator, model, and routing details .