sensors Mode-S transponder
780E51
ICAO 24-bit transponder address · allocated to China
Currently assigned to B-8331 · AIRBUS A-320
- Hex
- 780E51
- Octal
- 36007121
- Decimal
- 7,867,985
- Country
- CN
- Tail
- B-8331
- Type
- A320
- Flights observed
- 26
- Distinct callsigns
- 20
- Country
- CN
- Last broadcast
- Jul 26, 12:35 UTC
Current position
Country allocation
The ICAO 24-bit address 780E51 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 |
|---|---|---|---|
| CSC3708 | Sichuan Airlines | 4 | 2026-07-26 |
| CSC3707 | Sichuan Airlines | 4 | 2026-07-26 |
| CSC8838 | - | 1 | 2026-07-22 |
| CSC8837 | - | 1 | 2026-07-23 |
| CSC8764 | Sichuan Airlines | 1 | 2026-04-16 |
| CSC8706 | Sichuan Airlines | 1 | 2026-04-25 |
| CSC8705 | Sichuan Airlines | 1 | 2026-04-25 |
| CSC8704 | Sichuan Airlines | 1 | 2026-04-16 |
| CSC8703 | Sichuan Airlines | 1 | 2026-04-16 |
| CSC8471 | Sichuan Airlines | 1 | 2026-04-21 |
| CSC8264 | - | 1 | 2026-07-07 |
| CSC6461 | - | 1 | 2026-07-03 |
| CSC6421 | Sichuan Airlines | 1 | 2026-07-01 |
| CSC3927 | - | 1 | 2026-07-05 |
| CSC3906 | - | 1 | 2026-07-05 |
| CSC3905 | - | 1 | 2026-07-04 |
| CSC3125 | - | 1 | 2026-06-19 |
| CSC3122 | Sichuan Airlines | 1 | 2026-05-09 |
| CSC3121 | Sichuan Airlines | 1 | 2026-05-09 |
| CSC3115 | Sichuan Airlines | 1 | 2026-07-23 |
Recent flights last 26
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | CSC3708 | ICN → DYG | Jul 26, 12:00 UTC | Jul 26, 12:35 UTC | 35m |
| 2026-07-26 | CSC3707 | DYG → ICN | Jul 26, 09:50 UTC | Jul 26, 10:10 UTC | 20m |
| 2026-07-25 | CSC3708 | ICN → DYG | Jul 25, 10:50 UTC | Jul 25, 11:25 UTC | 35m |
| 2026-07-25 | CSC3707 | DYG → ICN | Jul 25, 09:05 UTC | Jul 25, 09:30 UTC | 25m |
| 2026-07-23 | CSC8837 | - | Jul 23, 22:55 UTC | Jul 23, 23:15 UTC | 20m |
| 2026-07-23 | CSC3115 | PEK → SYX | Jul 23, 00:10 UTC | Jul 23, 13:35 UTC | 13h 25m |
| 2026-07-22 | CSC8838 | - | Jul 22, 16:00 UTC | Jul 22, 16:25 UTC | 25m |
| 2026-07-12 | CSC3708 | - | Jul 12, 12:01 UTC | Jul 12, 12:20 UTC | 20m |
| 2026-07-12 | CSC3707 | - | Jul 12, 09:50 UTC | Jul 12, 10:10 UTC | 20m |
| 2026-07-11 | CSC3708 | - | Jul 11, 10:40 UTC | Jul 11, 11:00 UTC | 20m |
| 2026-07-11 | CSC3707 | - | Jul 11, 08:55 UTC | Jul 11, 09:30 UTC | 35m |
| 2026-07-07 | CSC8264 | - | Jul 7, 16:35 UTC | Jul 7, 16:45 UTC | 10m |
| 2026-07-05 | CSC3927 | - | Jul 5, 16:10 UTC | Jul 6, 05:00 UTC | 12h 50m |
| 2026-07-05 | CSC3906 | - | Jul 5, 02:35 UTC | Jul 5, 02:50 UTC | 15m |
| 2026-07-04 | CSC3905 | - | Jul 4, 16:25 UTC | Jul 4, 16:45 UTC | 20m |
| 2026-07-03 | CSC6461 | - | Jul 3, 07:55 UTC | Jul 3, 08:10 UTC | 15m |
| 2026-07-01 | CSC6421 | TFU → DLC | Jul 1, 03:15 UTC | Jul 1, 05:55 UTC | 2h 40m |
| 2026-06-19 | CSC3125 | - | Jun 19, 23:49 UTC | Jun 20, 00:14 UTC | 25m |
| 2026-05-09 | CSC3121 | PEK → URC | May 9, 13:05 UTC | May 9, 13:15 UTC | 10m |
| 2026-05-09 | CSC3122 | URC → PEK | May 9, 11:05 UTC | May 9, 11:25 UTC | 20m |
| 2026-04-25 | CSC8706 | SZX → CTU | Apr 25, 08:40 UTC | Apr 25, 08:50 UTC | 10m |
| 2026-04-25 | CSC8705 | CTU → SZX | Apr 25, 07:20 UTC | Apr 25, 07:30 UTC | 10m |
| 2026-04-21 | CSC8471 | CTU → HRB | Apr 21, 00:55 UTC | Apr 21, 01:15 UTC | 20m |
| 2026-04-16 | CSC8764 | ZUH → CTU | Apr 16, 15:25 UTC | Apr 16, 15:40 UTC | 15m |
| 2026-04-16 | CSC8704 | SZX → CTU | Apr 16, 07:39 UTC | Apr 16, 08:00 UTC | 20m |
| 2026-04-16 | CSC8703 | CTU → SZX | Apr 16, 06:10 UTC | Apr 16, 06:25 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-8331 page for operator, model, and routing details .