| 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 |
|---|---|---|
| 289-898 | Clarkson | Wireless |
| 289-260 | Hamilton | Wireless |
| 289-879 | Aurora | Wireless |
| 289-796 | Aurora | Landline |
| 289-960 | Caledonia | Landline |
| 289-839 | Georgetown | Landline |
| 289-535 | Newmarket | Landline |
| 289-230 | Burlington | Wireless |
| 289-888 | Oakville | Wireless |
| 289-699 | Richmond Hill | Landline |
| 289-970 | Beeton | Wireless |
| 289-886 | Oshawa | Wireless |
| 289-257 | Niagara Falls | Wireless |
| 289-565 | Cooksville | Landline |
| 289-472 | Thornhill | Landline |
| 289-937 | Oakville | Wireless |
| 289-928 | Oshawa | Wireless |
| 289-788 | Hamilton | Wireless |
| 289-802 | Aurora | Landline |
| 289-974 | Saint Catharines Thorold | Landline |