sensors Mode-S transponder
7813FD
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-1057 · AIRBUS A-321
- Hex
- 7813FD
- Octal
- 36011775
- Decimal
- 7,869,437
- Country
- CN
- Tail
- B-1057
- Type
- A321
- Flights observed
- 30
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- 8d ago
Last known position
Country allocation
The ICAO 24-bit address 7813FD 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 |
|---|---|---|---|
| CSC3935 | Sichuan Airlines | 5 | 2026-05-02 |
| CSC3936 | Sichuan Airlines | 3 | 2026-05-02 |
| CSC8702 | Sichuan Airlines | 2 | 2026-04-21 |
| CSC3931 | Sichuan Airlines | 2 | 2026-05-01 |
| CSC3248 | Sichuan Airlines | 2 | 2026-05-04 |
| CSC8892 | Sichuan Airlines | 1 | 2026-05-21 |
| CSC8891 | Sichuan Airlines | 1 | 2026-05-21 |
| CSC8834 | Sichuan Airlines | 1 | 2026-04-25 |
| CSC8832 | Sichuan Airlines | 1 | 2026-04-24 |
| CSC8710 | Sichuan Airlines | 1 | 2026-05-16 |
| CSC8709 | - | 1 | 2026-05-15 |
| CSC8707 | Sichuan Airlines | 1 | 2026-05-20 |
| CSC8704 | Sichuan Airlines | 1 | 2026-05-15 |
| CSC8703 | Sichuan Airlines | 1 | 2026-05-15 |
| CSC8701 | Sichuan Airlines | 1 | 2026-04-21 |
| CSC8006 | - | 1 | 2026-04-26 |
| CSC8005 | - | 1 | 2026-04-26 |
| CSC6880 | Sichuan Airlines | 1 | 2026-05-08 |
| CSC6733 | Sichuan Airlines | 1 | 2026-05-05 |
| CSC3932 | Sichuan Airlines | 1 | 2026-05-01 |
Recent flights last 30
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-21 | CSC8892 | PEK → CTU | May 21, 10:35 UTC | May 21, 10:50 UTC | 15m |
| 2026-05-21 | CSC8891 | CTU → PEK | May 21, 08:55 UTC | May 21, 09:05 UTC | 10m |
| 2026-05-20 | CSC8707 | CTU → SZX | May 20, 09:50 UTC | May 20, 10:00 UTC | 10m |
| 2026-05-16 | CSC8710 | SZX → CTU | May 16, 03:30 UTC | May 16, 03:40 UTC | 10m |
| 2026-05-15 | CSC8709 | - | May 15, 15:45 UTC | May 15, 15:55 UTC | 10m |
| 2026-05-15 | CSC8704 | SZX → CTU | May 15, 10:05 UTC | May 15, 10:20 UTC | 15m |
| 2026-05-15 | CSC8703 | CTU → SZX | May 15, 08:40 UTC | May 15, 08:50 UTC | 10m |
| 2026-05-08 | CSC6880 | PEK → TFU | May 8, 00:29 UTC | May 8, 00:49 UTC | 20m |
| 2026-05-05 | CSC6733 | CGO → CGQ | May 5, 12:55 UTC | May 6, 07:05 UTC | 18h 10m |
| 2026-05-05 | CSC3247 | SYX → TNA | May 5, 00:35 UTC | May 5, 13:10 UTC | 12h 35m |
| 2026-05-04 | CSC3248 | TNA → SYX | May 4, 13:20 UTC | May 5, 13:10 UTC | 23h 51m |
| 2026-05-04 | CSC3248 | TNA → SYX | May 4, 00:25 UTC | May 4, 13:30 UTC | 13h 5m |
| 2026-05-02 | CSC3936 | BKK → TFU | May 2, 11:20 UTC | May 2, 12:15 UTC | 55m |
| 2026-05-02 | CSC3935 | TFU → BKK | May 2, 09:00 UTC | May 2, 09:35 UTC | 35m |
| 2026-05-01 | CSC3935 | TFU → BKK | May 1, 13:20 UTC | May 2, 09:35 UTC | 20h 16m |
| 2026-05-01 | CSC3932 | HKT → TFU | May 1, 12:45 UTC | May 2, 09:35 UTC | 20h 50m |
| 2026-05-01 | CSC3931 | TFU → HKT | May 1, 09:40 UTC | May 2, 09:15 UTC | 23h 35m |
| 2026-04-30 | CSC3931 | TFU → HKT | Apr 30, 11:40 UTC | May 1, 10:35 UTC | 22h 55m |
| 2026-04-30 | CSC3935 | TFU → BKK | Apr 30, 09:20 UTC | Apr 30, 10:10 UTC | 50m |
| 2026-04-26 | CSC8006 | - | Apr 26, 15:35 UTC | Apr 26, 15:45 UTC | 10m |
| 2026-04-26 | CSC8005 | - | Apr 26, 13:45 UTC | Apr 26, 13:55 UTC | 10m |
| 2026-04-25 | CSC8834 | PEK → CKG | Apr 25, 15:20 UTC | Apr 26, 13:55 UTC | 22h 35m |
| 2026-04-24 | CSC8832 | PEK → CKG | Apr 24, 10:55 UTC | Apr 25, 03:20 UTC | 16h 25m |
| 2026-04-21 | CSC8702 | SZX → CTU | Apr 21, 02:10 UTC | Apr 21, 02:25 UTC | 15m |
| 2026-04-21 | CSC8701 | CTU → SZX | Apr 21, 00:20 UTC | Apr 21, 00:35 UTC | 15m |
| 2026-04-17 | CSC8702 | SZX → CTU | Apr 17, 02:15 UTC | Apr 17, 02:25 UTC | 10m |
| 2026-04-14 | CSC3936 | BKK → TFU | Apr 14, 11:20 UTC | Apr 14, 11:35 UTC | 15m |
| 2026-04-14 | CSC3935 | TFU → BKK | Apr 14, 09:15 UTC | Apr 14, 09:35 UTC | 20m |
| 2026-04-13 | CSC3936 | - | Apr 13, 11:15 UTC | Apr 13, 11:35 UTC | 20m |
| 2026-04-13 | CSC3935 | TFU → BKK | Apr 13, 09:15 UTC | Apr 13, 09:45 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-1057 page for operator, model, and routing details .