| Place | Post Code |
|---|---|
| Plasma Mondang, Sosa | 22765 |
| Ramba, Sosa | 22765 |
| Rao Rao Dolok, Sosa | 22765 |
| Roburan, Sosa | 22765 |
| Siborna Bunut, Sosa | 22765 |
| Siginduang, Sosa | 22765 |
| Simarancar, Sosa | 22765 |
| Sisoma, Sosa | 22765 |
| Sungai Jior, Sosa | 22765 |
| Tanjung, Sosa | 22765 |
| Tanjung Bale, Sosa | 22765 |
| Tanjung Botung Sosa Jae, Sosa | 22765 |
| Tj Botung Sosa Jae, Sosa | 22765 |
| Ujung Batu, Sosa | 22765 |