| District of Ontario area codes: 289 | |
|---|---|
| Country | Canada |
| State/Province | Ontario |
| Major City | Welland |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 289-372 | Pickering, ON | Allstream Inc. | |
| 289-373 | Clarkson, ON | Allstream Inc. | |
| 289-374 | Cooksville, ON | Allstream Inc. | |
| 289-375 | Streetsville, ON | Telus Integrated Communications | |
| 289-376 | Port Robinson, ON | Telus Integrated Communications | |
| 289-377 | Dunnville, ON | Bell Mobility | |
| 289-378 | Markham, ON | Fibernetics Corporation | |
| 289-379 | Richmond Hill, ON | Fibernetics Corporation | |
| 289-380 | Aurora, ON | Rogers Communications Partnership (wireless) | |
| 289-381 | Dunnville, ON | Rogers Communications Partnership (wireless) | |
| 289-382 | Hamilton, ON | Rogers Communications Partnership (wireless) | |
| 289-383 | Newmarket, ON | Bell Mobility | |
| 289-384 | Malton, ON | Fibernetics Corporation | |
| 289-385 | Oshawa, ON | Bell Mobility | |
| 289-386 | Oakville, ON | Bell Canada | |
| 289-387 | Pickering, ON | Bell Mobility | |
| 289-388 | Pickering, ON | Bell Mobility | |
| 289-389 | Hamilton, ON | Telus Integrated Communications | |
| 289-390 | Thornhill, ON | Telus Integrated Communications | |
| 289-391 | Hamilton, ON | Telus Integrated Communications |
There are 640 prefixes, In the code area, the major cities are Oakville, ON;Colborne, ON;Welland, ON;Vineland, ON. The major city is Oakville.