| Municipality | ZIP Code |
|---|---|
| Itbayat | 3905 |
| Location | Municipality | Province | Region | ZIP Code |
|---|---|---|---|---|
| Raele | Itbayat | Batanes | Cagayan Valley | 3905 |
| San Rafael | Itbayat | Batanes | Cagayan Valley | 3905 |
| Santa Lucia | Itbayat | Batanes | Cagayan Valley | 3905 |
| Santa Maria | Itbayat | Batanes | Cagayan Valley | 3905 |
| Santa Rosa | Itbayat | Batanes | Cagayan Valley | 3905 |
