| Place | Post Code |
|---|---|
| Arantzazu, Vizcaya) | 48140 |
| Arantzazugoiti, Vizcaya) | 48140 |
| Olarra, Vizcaya) | 48140 |
| Zelaia, Vizcaya) | 48140 |
| Postal Codes in Arratia-Nervión | |
|---|---|
| Arantzazu | |
| Areatza | |
| Arrankudiaga | |
| Artea | |
| Barrika | |
| Bedia | |
| Dima | |
| Igorre | |
| Lemoa | |
| Orozko | |
| Ubide | |
| Ugao-Miraballes | |
| Urduña/Orduña | |
| Zeanuri | |
| Zeberio | |