| General Information about Area Code 289 | |
|---|---|
| Country | Canada |
| State / Province / Territory | Ontario |
| Major City | Unionville |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | Phone Type |
|---|---|---|
| 289-237 | Hamilton | Wireless |
| 289-312 | Oshawa | Landline |
| 289-774 | Hamilton | Wireless |
| 289-629 | Newcastle | Landline |
| 289-514 | Thornhill | Landline |
| 289-737 | Dundas | Landline |
| 289-738 | Dunnville | Landline |
| 289-834 | Oakville | Wireless |
| 289-628 | Clarkson | Landline |
| 289-415 | Beeton | Landline |
| 289-869 | Oshawa | Landline |
| 289-956 | West Lincoln | Landline |
| 289-436 | Port Hope | Landline |
| 289-456 | Hamilton | Wireless |
| 289-846 | Markham | Landline |
| 289-341 | Niagara Falls | Landline |
| 289-526 | Stoney Creek | Landline |
| 289-607 | Wellandport | Landline |
| 289-835 | Oakville | Landline |
| 289-462 | Claremont | Landline |