Class 51.21 - Freight air transport
| SNI code | Activity |
|---|---|
| H | TRansportation and storage |
| 51 | Air transport |
| 51.2 | Freight air transport and space transport |
| 51.21 | Freight air transport |
| 51.211 | Scheduled freight air transport |
| 51.212 | Non-scheduled freight air transport |