| Lieu | Code postal |
|---|---|
| Bagonbon, San Carlos | 6127 |
| Barangay I, San Carlos | 6127 |
| Barangay II, San Carlos | 6127 |
| Barangay III, San Carlos | 6127 |
| Barangay IV, San Carlos | 6127 |
| Barangay V, San Carlos | 6127 |
| Barangay VI, San Carlos | 6127 |
| Buluangan, San Carlos | 6127 |
| Codcod, San Carlos | 6127 |
| Ermita, San Carlos | 6127 |
| Guadalupe, San Carlos | 6127 |
| Nataban, San Carlos | 6127 |
| Palampas, San Carlos | 6127 |
| Prosperidad, San Carlos | 6127 |
| Punao, San Carlos | 6127 |
| Quezon, San Carlos | 6127 |
| Rizal, San Carlos | 6127 |
| San Juan, San Carlos | 6127 |