| Place | Post Code |
|---|---|
| Bambad, Isulan | 9805 |
| Bual, Isulan | 9805 |
| D'Lotilla, Isulan | 9805 |
| Dansuli, Isulan | 9805 |
| Impao, Isulan | 9805 |
| Kalawag I, Isulan | 9805 |
| Kalawag II, Isulan | 9805 |
| Kalawag III, Isulan | 9805 |
| Kenram, Isulan | 9805 |
| Kolambog, Isulan | 9805 |
| Kudanding, Isulan | 9805 |
| Lagandang, Isulan | 9805 |
| Laguilayan, Isulan | 9805 |
| Mapantig, Isulan | 9805 |
| New Pangasinan, Isulan | 9805 |
| Sampao, Isulan | 9805 |
| Tayugo, Isulan | 9805 |