| Locality | Post Code |
|---|---|
| Refugio Vialidad, San Carlos | M5569 XBF |
| Rincón Huaiquerías, San Carlos | M5569 XBG |
| Rivas, San Carlos | M5569 XGZ |
| S Estrella, San Carlos | M5569 XHA |
| San Carlos, San Carlos | M5512 |
| Tierras Blancas, San Carlos | M5569 XAC |
| Tres Banderas, San Carlos | M5517 XAF |
| Tres Esquinas, San Carlos | M5514 |
| Vega de Praso, San Carlos | M5569 XHC |
| Vegas de Las Ovejas, San Carlos | M5569 XHD |
| Viuda de Satelo, San Carlos | M5569 XHB |
| Volcán Maipú, San Carlos | M5569 XHE |