| ZIP | Locality | Prov | Region | Area Code | Belfiore | Notes | Locality | area code |
|---|---|---|---|---|---|---|---|---|
| 28060 | San Nazzaro Sesia | NO | Piedmont | 0321 | I052 | San Nazzaro Sesia NO - Piedmont | 0321 | |
| 28060 | San Pietro Mosezzo | NO | Piedmont | 0321 | I116 | San Pietro Mosezzo NO - Piedmont | 0321 | |
| 28064 | Sillavengo | NO | Piedmont | 0321 | I736 | Sillavengo NO - Piedmont | 0321 | |
| 28070 | Sizzano | NO | Piedmont | 0321 | I767 | Sizzano NO - Piedmont | 0321 | |
| 28060 | Sozzago | NO | Piedmont | 0321 | I880 | Sozzago NO - Piedmont | 0321 | |
| 28070 | Terdobbiate | NO | Piedmont | 0321 | L104 | Terdobbiate NO - Piedmont | 0321 | |
| 28070 | Tornaco | NO | Piedmont | 0321 | L223 | Tornaco NO - Piedmont | 0321 | |
| 28069 | Trecate | NO | Piedmont | 0321 | L356 | Trecate NO - Piedmont | 0321 | |
| 28010 | Vaprio d'Agogna | NO | Piedmont | 0321 | L668 | Vaprio d'Agogna NO - Piedmont | 0321 | |
| 28040 | Varallo Pombia | NO | Piedmont | 0321 | L670 | Varallo Pombia NO - Piedmont | 0321 |