| District of Ontario area codes: 905 | |
|---|---|
| Country | Canada |
| State/Province | Ontario |
| Major City | Richmond Hill |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 905-452 | Brampton, ON | Bell Canada | |
| 905-453 | Brampton, ON | Bell Canada | |
| 905-454 | Brampton, ON | Bell Canada | |
| 905-455 | Brampton, ON | Bell Canada | |
| 905-456 | Brampton, ON | Bell Canada | |
| 905-457 | Brampton, ON | Bell Canada | |
| 905-458 | Brampton, ON | Bell Canada | |
| 905-459 | Brampton, ON | Bell Canada | |
| 905-460 | Brampton, ON | Bell Canada | |
| 905-461 | Malton, ON | Rogers Communications Partnership (cable) | |
| 905-462 | Milton, ON | Fido Solutions Inc. | |
| 905-463 | Brampton, ON | Rogers Communications Partnership (cable) | |
| 905-464 | Oakville, ON | Bell Mobility | |
| 905-465 | Oakville, ON | Bell Canada | |
| 905-466 | Oakville, ON | Bell Mobility | |
| 905-467 | Oakville, ON | Bell Mobility | |
| 905-468 | Niagara On The Lake, ON | Bell Canada | |
| 905-469 | Oakville, ON | Bell Canada | |
| 905-470 | Unionville, ON | Bell Canada | |
| 905-471 | Markham, 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.