| 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 |
|---|---|---|
| 289-573 | Oak Ridges | Landline |
| 289-262 | Bethesda | Landline |
| 289-413 | Niagara On The Lake | Landline |
| 289-818 | Markham | Landline |
| 289-569 | Brampton | Landline |
| 289-892 | Pickering | Wireless |
| 289-409 | Milton | Landline |
| 289-536 | Woodbridge | Landline |
| 289-805 | Cooksville | Landline |
| 289-994 | Hamilton | Wireless |
| 289-604 | Dunnville | Landline |
| 289-560 | West Lincoln | Landline |
| 289-248 | Niagara Falls | Landline |
| 289-294 | Niagara Falls | Landline |
| 289-795 | Oakville | Wireless |
| 289-814 | Streetsville | Landline |
| 289-521 | Cooksville | Landline |
| 289-732 | Whitby | Landline |
| 289-466 | Aurora | Landline |
| 289-561 | Thornhill | Landline |