30306 is the Postal Code/ZIP Code for the District of Dulce Nombre in the Costa Rica Province of Cartago and the Canton of La Unión. The neighborhoods of Alto El Carmen, Martínez and Tirrá are located in Postal Code 30306.
| Postal Code | 30306 |
| Postal Code Name | Dulce Nombre |
| Province | Cartago Province |
| Canton | La Unión Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 10806 11504 30104 30110 30301 30304 30305 30307 |