| Place | Post Code |
|---|---|
| Biaknabato, La Castellana | 6131 |
| Cabacungan, La Castellana | 6131 |
| Cabagnaan, La Castellana | 6131 |
| Camandag, La Castellana | 6131 |
| Lalagsan, La Castellana | 6131 |
| Manghanoy, La Castellana | 6131 |
| Mansalanao, La Castellana | 6131 |
| Masulog, La Castellana | 6131 |
| Nato, La Castellana | 6131 |
| Puso, La Castellana | 6131 |
| Robles, La Castellana | 6131 |
| Sag-Ang, La Castellana | 6131 |
| Talaptap, La Castellana | 6131 |