| Place | Post Code |
|---|---|
| Bigbiga, Sudipen | 2520 |
| Bulalaan, Sudipen | 2520 |
| Castro, Sudipen | 2520 |
| Duplas, Sudipen | 2520 |
| Ilocano, Sudipen | 2520 |
| Ipet, Sudipen | 2520 |
| Maliclico, Sudipen | 2520 |
| Namaltugan, Sudipen | 2520 |
| Old Central, Sudipen | 2520 |
| Poblacion, Sudipen | 2520 |
| Porporiket, Sudipen | 2520 |
| San Francisco Norte, Sudipen | 2520 |
| San Francisco Sur, Sudipen | 2520 |
| San Jose, Sudipen | 2520 |
| Sengngat, Sudipen | 2520 |
| Turod, Sudipen | 2520 |
| Up-Uplas, Sudipen | 2520 |