| Place | Post Code |
|---|---|
| Chanarian, Basco | 3900 |
| Ihubok I, Basco | 3900 |
| Ihubok II, Basco | 3900 |
| Kayhuvokan, Basco | 3900 |
| San Antonio, Basco | 3900 |
| San Joaquin, Basco | 3900 |
| All postal codes in Batanes | |
|---|---|
| Basco, Batanes | |
| Itbayat, Batanes | |
| Ivana, Batanes | |
| Mahatao, Batanes | |
| Sabtang, Batanes | |
| Uyugan, Batanes | |