| Place | Post Code |
|---|---|
| Damro, East) | 791103 |
| Dite Dime, East) | 791102 |
| Geku, East) | 791002 |
| Parong, East) | 791102 |
| Riga, East) | 791102, 791103 |
| Riga Circle, East) | 791102 |
| Riga/Mobuk, East) | 791102 |
| Sitang, East) | 791102 |
| Ugeng, East) | 791102 |
| Postal Codes in Siang | |
|---|---|
| Boleng | |
| Jomlo Mobuk | |
| Kamba | |
| Kaying | |
| Kebang | |
| Pangin | |
| Payum | |
| Rebo-Perging | |
| Riga | |
| Rumgong | |