sensors Mode-S transponder
781DF7
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-32AH · AIRBUS A-320neo
- Hex
- 781DF7
- Octal
- 36016767
- Decimal
- 7,871,991
- Country
- CN
- Tail
- B-32AH
- Type
- A20N
- Flights observed
- 24
- Distinct callsigns
- 9
- Country
- CN
- Last broadcast
- 13h ago
Last known position
Country allocation
The ICAO 24-bit address 781DF7 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 9 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| CSC3937 | Sichuan Airlines | 5 | 2026-05-29 |
| CSC3901 | Sichuan Airlines | 5 | 2026-05-27 |
| CSC3938 | Sichuan Airlines | 4 | 2026-05-29 |
| CSC3920 | Sichuan Airlines | 3 | 2026-05-27 |
| CSC3919 | Sichuan Airlines | 3 | 2026-05-27 |
| CSC3902 | Sichuan Airlines | 1 | 2026-05-26 |
| CSC3702 | Sichuan Airlines | 1 | 2026-05-14 |
| CSC3701 | Sichuan Airlines | 1 | 2026-05-14 |
| CSC3272 | Sichuan Airlines | 1 | 2026-05-15 |
Recent flights last 24
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | CSC3938 | BKK → TFU | May 29, 18:25 UTC | May 29, 19:25 UTC | 1h 0m |
| 2026-05-29 | CSC3937 | TFU → BKK | May 29, 15:45 UTC | May 29, 17:00 UTC | 1h 15m |
| 2026-05-28 | CSC3938 | BKK → TFU | May 28, 18:25 UTC | May 29, 15:45 UTC | 21h 20m |
| 2026-05-28 | CSC3937 | TFU → BKK | May 28, 16:10 UTC | May 28, 17:05 UTC | 55m |
| 2026-05-27 | CSC3937 | TFU → BKK | May 27, 19:50 UTC | May 28, 17:05 UTC | 21h 15m |
| 2026-05-27 | CSC3920 | SIN → TFU | May 27, 17:50 UTC | May 28, 17:05 UTC | 23h 15m |
| 2026-05-27 | CSC3920 | SIN → TFU | May 27, 17:20 UTC | May 27, 19:55 UTC | 2h 35m |
| 2026-05-27 | CSC3919 | TFU → SIN | May 27, 05:59 UTC | May 27, 15:25 UTC | 9h 25m |
| 2026-05-27 | CSC3901 | TFU → KTM | May 27, 03:24 UTC | May 27, 04:45 UTC | 1h 20m |
| 2026-05-26 | CSC3901 | TFU → KTM | May 26, 07:49 UTC | May 27, 04:45 UTC | 20h 55m |
| 2026-05-26 | CSC3902 | KTM → TFU | May 26, 06:29 UTC | May 26, 08:19 UTC | 1h 50m |
| 2026-05-25 | CSC3901 | TFU → KTM | May 25, 10:05 UTC | May 26, 04:39 UTC | 18h 35m |
| 2026-05-25 | CSC3901 | TFU → KTM | May 25, 08:40 UTC | May 26, 04:39 UTC | 19h 59m |
| 2026-05-25 | CSC3901 | TFU → KTM | May 25, 05:00 UTC | May 25, 06:45 UTC | 1h 45m |
| 2026-05-15 | CSC3272 | DYG → XIY | May 15, 03:10 UTC | May 15, 03:20 UTC | 10m |
| 2026-05-14 | CSC3702 | TAE → DYG | May 14, 08:10 UTC | May 14, 08:25 UTC | 15m |
| 2026-05-14 | CSC3701 | DYG → TAE | May 14, 06:50 UTC | May 14, 07:05 UTC | 15m |
| 2026-05-07 | CSC3938 | BKK → TFU | May 7, 18:15 UTC | May 7, 19:10 UTC | 55m |
| 2026-05-07 | CSC3937 | TFU → BKK | May 7, 16:00 UTC | May 7, 16:50 UTC | 50m |
| 2026-04-19 | CSC3920 | SIN → TFU | Apr 19, 18:30 UTC | Apr 20, 08:15 UTC | 13h 45m |
| 2026-04-19 | CSC3919 | TFU → SIN | Apr 19, 14:05 UTC | Apr 19, 16:40 UTC | 2h 35m |
| 2026-04-18 | CSC3919 | TFU → SIN | Apr 18, 18:25 UTC | Apr 19, 16:40 UTC | 22h 15m |
| 2026-04-18 | CSC3937 | TFU → BKK | Apr 18, 16:35 UTC | Apr 18, 17:00 UTC | 25m |
| 2026-04-12 | CSC3938 | BKK → TFU | Apr 12, 18:20 UTC | Apr 12, 18:40 UTC | 20m |
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-32AH page for operator, model, and routing details .