| Country | United Kingdom (GB) |
| UN/LOCODE | LFF |
| Name | Llansteffan |
| Name Without Diacritics | Llansteffan |
| Region | CMN |
| Function Code | 1------- |
| Function | Port |
| Status Code | RL (Recognised Location) |
| Date | 901 |
| Timezone | Europe/London |
| Location (UN Format) | 5146N 00423W |
| Latitude Longitude | 51.7722, -4.3914 |