| Country | United Kingdom (GB) |
| UN/LOCODE | NEF |
| Name | Nefyn |
| Name Without Diacritics | Nefyn |
| Region | GWN |
| Function Code | 1-3----- |
| Function | Port, Road |
| Status Code | AA (Approved By National Government Agency) |
| Date | 701 |
| Timezone | Europe/London |
| Location (UN Format) | 5256N 00430W |
| Latitude Longitude | 52.9354, -4.5225 |