| 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 |
|---|---|---|
| 289-517 | Dundas | Landline |
| 289-666 | Markham | Landline |
| 289-453 | Newmarket | Landline |
| 289-987 | Pickering | Wireless |
| 289-822 | Port Credit | Wireless |
| 289-421 | Cooksville | Landline |
| 289-934 | Newmarket | Wireless |
| 289-688 | Oshawa | Wireless |
| 289-495 | Ancaster | Landline |
| 289-314 | Pickering | Wireless |
| 289-657 | Woodbridge | Landline |
| 289-829 | Cobourg | Wireless |
| 289-931 | Saint Catharines Thorold | Wireless |
| 289-633 | Cooksville | Landline |
| 289-387 | Pickering | Wireless |
| 289-663 | Newmarket | Landline |
| 289-576 | Sutton | Landline |
| 289-306 | Markham | Landline |
| 289-921 | Hamilton | Wireless |
| 289-201 | Brampton | Landline |