| Place | Post Code |
|---|---|
| Cajón, Mercedes | 20503 |
| Callao, Mercedes | 20503 |
| Mercedes, Mercedes | 20503 |
| Plancillo, Mercedes | 20503 |
| Plazoleta, Mercedes | 20503 |
| All postal codes in Atenas | |
|---|---|
| Atenas, Atenas | |
| Concepción, Atenas | |
| Escobal, Atenas | |
| Jesús, Atenas | |
| Mercedes, Atenas | |
| San Isidro, Atenas | |
| San José, Atenas | |
| Santa Eulalia, Atenas | |