| Place | Post Code |
|---|---|
| Alegria, Caibiran | 6548 |
| Asug, Caibiran | 6548 |
| Bari-Is, Caibiran | 6548 |
| Binohangan, Caibiran | 6548 |
| Cabibihan, Caibiran | 6548 |
| Caulangohan, Caibiran | 6548 |
| Kawayanon, Caibiran | 6548 |
| Looc, Caibiran | 6548 |
| Manlabang, Caibiran | 6548 |
| Maurang, Caibiran | 6548 |
| Palanay, Caibiran | 6548 |
| Palengke, Caibiran | 6548 |
| Tomalistis, Caibiran | 6548 |
| Union, Caibiran | 6548 |
| Uson, Caibiran | 6548 |
| Victory, Caibiran | 6548 |
| Villa Vicenta, Caibiran | 6548 |
| All postal codes in Biliran | |
|---|---|
| Almeria, Biliran | |
| Biliran, Biliran | |
| Cabucgayan, Biliran | |
| Caibiran, Biliran | |
| Culaba, Biliran | |
| Kawayan, Biliran | |
| Maripipi, Biliran | |
| Naval, Biliran | |