| 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 |
|---|---|---|
| 289-386 | Oakville | Landline |
| 289-843 | Thornhill | Landline |
| 289-842 | Richmond Hill | Landline |
| 289-632 | Brampton | Landline |
| 289-444 | Cooksville | Landline |
| 289-234 | Oak Ridges | Landline |
| 289-766 | Hamilton | Wireless |
| 289-746 | Gormley | Landline |
| 289-891 | Georgetown | Landline |
| 289-507 | Markham | Landline |
| 289-979 | Oshawa | Wireless |
| 289-533 | Pickering | Landline |
| 289-817 | Oakville | Landline |
| 289-614 | Aurora | Landline |
| 289-301 | Markham | Landline |
| 289-438 | Saint Catharines Thorold | Landline |
| 289-668 | Saint Catharines Thorold | Landline |
| 289-759 | Mount Hope | Landline |
| 289-809 | Richmond Hill | Landline |
| 289-278 | Whitby | Landline |