All postcodes in LL30 9
| Postcode | Place | Type |
|---|---|---|
| LL30 9EW | Llandudno | large user |
| LL30 9FE | Llandudno | large user |
| LL30 9FU | Llandudno | large user |
| LL30 9FX | Llandudno | large user |
| LL30 9GE | Llandudno | large user |
| LL30 9GH | Llandudno | large user |
| LL30 9GN | Llandudno | large user |
| LL30 9GY | Llandudno | large user |
| LL30 9HH | Llandudno | large user |
| LL30 9HN | Llandudno | large user |
| LL30 9HP | Llandudno | large user |
| LL30 9HR | Llandudno | large user |
| LL30 9HS | Llandudno | large user |
| LL30 9SA | — | large user |
| LL30 9SB | — | large user |
| LL30 9YX | Conwy | large user |
| LL30 9YY | Conwy | large user |
| LL30 9ZX | — | large user |
| LL30 9ZY | Conwy | large user |
| LL30 9ZZ | Conwy | large user |