| Place | Postal Code |
|---|---|
| Herce, La Rioja) | 26585 |
| Santa Eulalia Bajera, La Rioja) | 26585 |
| Santa Eulalia Somera, La Rioja) | 26585 |
| Postal Codes in Arnedo | |
|---|---|
| Arnedillo | |
| Arnedo | |
| Bergasa | |
| Bergasillas Bajera | |
| Cornago | |
| Enciso | |
| Grávalos | |
| Herce | |
| Munilla | |
| Muro de Aguas | |
| Préjano | |
| Quel | |
| Santa Eulalia Bajera | |
| Villarroya | |
| Zarzosa | |