| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Barazzetto, Biella | 13900 |
| Postal/ZIP Codes in Biella, Biella | 13894, 13900 |
| Postal/ZIP Codes in Chiavazza, Biella | 13900 |
| Postal/ZIP Codes in Colma, Biella | 13900 |
| Postal/ZIP Codes in Cossila, Biella | 13900 |
| Postal/ZIP Codes in Favaro, Biella | 13900 |
| Postal/ZIP Codes in Oropa, Biella | 13900 |
| Postal/ZIP Codes in Pavignano, Biella | 13900 |
| Postal/ZIP Codes in Vandorno, Biella | 13900 |