| Country | Poland (PL) |
| UN/LOCODE | SEN |
| Name | Siennica |
| Name Without Diacritics | Siennica |
| Region | 14 |
| Function Code | --3----- |
| Function | Road |
| Status Code | RL (Recognised Location) |
| Date | 1807 |
| Timezone | Europe/Warsaw |
| Location (UN Format) | 5206N 02137E |
| Latitude Longitude | 51.03, 23.1549 |