| Country | United Kingdom (GB) |
| UN/LOCODE | HLY |
| Name | Holyhead |
| Name Without Diacritics | Holyhead |
| Region | GWN |
| Function Code | 1--4---- |
| Function | Port, Airport |
| Status Code | AF (Approved by National Facilitation Body) |
| Date | 9511 |
| Country | United Kingdom (GB) |
| UN/LOCODE | HLY |
| Name | Holyhead |
| Name Without Diacritics | Holyhead |
| Region | GWN |
| Function Code | 1--4---- |
| Function | Port, Airport |
| Status Code | AF (Approved by National Facilitation Body) |
| Date | 9511 |