10306 is the Postal Code/ZIP Code for the District of Frailes in the Costa Rica Province of San José and the Canton of Desamparados. The neighborhoods of Bustamante Abajo, Bustamante Arriba, El Colegio, La Altura, San Francisco de Asís and San Martín are located in Postal Code 10306.
| Postal Code | 10306 |
| Postal Code Name | Frailes |
| Province | San José Province |
| Canton | Desamparados Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 10308 10309 10606 12002 12005 12006 30107 |