| Road Name | Postcode Area | Postcode District | Postcode Sector |
|---|---|---|---|
| HEOL Y WERN | CF | CF14 | CF14 6 |
| HEOL Y WERN | CF | CF46 | CF46 6 |
| HEOL Y WERN | CF | CF83 | CF83 3 |
| HEOL Y WERN | CH | CH7 | CH7 4 |
| HEOL Y WERN | SA | SA10 | SA10 7 |
| HEOL Y WERN | SA | SA4 | SA4 6 |
| HEOL Y WERN | SA | SA43 | SA43 1 |
| HEOL Y WERN | SY | SY23 | SY23 1 |