| Municipalities |
|---|
| Almeria, Biliran |
| Biliran, Biliran |
| Cabucgayan, Biliran |
| Caibiran, Biliran |
| Culaba, Biliran |
| Kawayan, Biliran |
| Maripipi, Biliran |
| Naval, Biliran |
| All postal codes in Eastern Visayas |
|---|
| Biliran |
| Eastern Samar |
| Leyte |
| Northern Samar |
| Samar |
| Southern Leyte |