Netnummers in Alton
| Netnummer▲ | Stad↕ | Bestuursregio↕ | Inwonersaantal stad↕ | Land/regio | Tijdzone |
|---|
| 519 | — | Ontario | 12,861,940 | Canada | America/Toronto |
| 905 | — | Ontario | 12,861,940 | Canada | America/Toronto |
Steden vlakbij
| Stad | Regio | Land | Bevolking | Netnummers | Postcodes |
|---|
| Caledon | Ontario | Canada | — | 519, 780, 905 | L7C, L7E, L7K, L0N |
| Erin | Ontario | Canada | — | 519 | L7J, N0B, L7K |
| Farmington | Ontario | Canada | — | 780 | — |
| Hillsburgh | Ontario | Canada | — | 519 | N0B |
| Orangeville (Canada) | Ontario | Canada | 32,640 | 519 | L9V, L9W, L7K |