| Road Name | Postcode Area | Postcode District | Postcode Sector |
|---|---|---|---|
| PEN Y GRAIG | CF | CF82 | CF82 7 |
| PEN Y GRAIG | LL | LL14 | LL14 1 |
| PEN Y GRAIG | LL | LL16 | LL16 3 |
| PEN Y GRAIG | LL | LL20 | LL20 7 |
| PEN Y GRAIG | LL | LL57 | LL57 3 |
| PEN Y GRAIG | LL | LL65 | LL65 4 |
| PEN Y GRAIG | SA | SA10 | SA10 6 |
| PEN Y GRAIG | SY | SY18 | SY18 6 |
| PEN Y GRAIG TERRACE | NP | NP13 | NP13 2 |