| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Biawu, Biau | 96523 |
| Postal/ZIP Codes in Bohulo, Biau | 96523 |
| Postal/ZIP Codes in Bualo, Biau | 96523 |
| Postal/ZIP Codes in Didingga, Biau | 96523 |
| Postal/ZIP Codes in Luhuto, Biau | 96523 |
| Postal/ZIP Codes in Omuto, Biau | 96523 |
| Postal/ZIP Codes in Potanga, Biau | 96523 |
| Postal/ZIP Codes in Sembihingan, Biau | 96523 |
| Postal/ZIP Codes in Topi, Biau | 96523 |
| Postal/ZIP Codes in Windu, Biau | 96523 |