| District of Ontario area codes: 905 | |
|---|---|
| Country | Canada |
| State/Province | Ontario |
| Major City | Richmond Hill |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 905-283 | Cooksville, ON | Telus Integrated Communications | |
| 905-284 | Gormley, ON | Rogers Communications Partnership (cable) | |
| 905-285 | Streetsville, ON | Bell Canada | |
| 905-286 | Streetsville, ON | Bell Canada | |
| 905-287 | Oakville, ON | Bell Canada | |
| 905-288 | Streetsville, ON | Telus Integrated Communications | |
| 905-290 | Cooksville, ON | Rogers Communications Partnership (cable) | |
| 905-291 | Brampton, ON | Allstream Inc. | |
| 905-292 | Richmond Hill, ON | Rogers Communications Partnership (cable) | |
| 905-293 | Malton, ON | Bell Canada | |
| 905-294 | Markham, ON | Bell Canada | |
| 905-295 | Niagara Falls, ON | Bell Canada | |
| 905-296 | Hamilton, ON | Rogers Communications Partnership (cable) | |
| 905-297 | Hamilton, ON | Rogers Communications Partnership (cable) | |
| 905-298 | Malton, ON | Telus Integrated Communications | |
| 905-299 | Milton, ON | Telus Mobility | |
| 905-300 | Unionville, ON | Rogers Communications Partnership (cable) | |
| 905-301 | Streetsville, ON | Bell Mobility | |
| 905-302 | Streetsville, ON | Bell Mobility | |
| 905-303 | Maple, ON | Bell Canada |
There are 770 prefixes, In the code area, the major cities are Stouffville, ON;Fisherville, ON;Richmond Hill, ON;. The major city is Stouffville.