| District of Ontario area codes: 905 | |
|---|---|
| Country | Canada |
| State/Province | Ontario |
| Major City | Richmond Hill |
| Time Zone | Eastern |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 905-970 | Brampton, ON | Bell Canada | |
| 905-971 | Hamilton, ON | Telus Mobility | |
| 905-972 | Hamilton, ON | Bell Canada | |
| 905-973 | Hamilton, ON | Bell Mobility | |
| 905-974 | Hamilton, ON | Bell Canada | |
| 905-975 | Hamilton, ON | Bell Mobility | |
| 905-977 | Hamilton, ON | Bell Canada | |
| 905-978 | Hamilton, ON | Bell Canada | |
| 905-979 | Hamilton, ON | Bell Mobility | |
| 905-980 | Saint Catharines Thorold, ON | Bell Canada | |
| 905-981 | Hamilton, ON | Telus Mobility | |
| 905-982 | Port Perry, ON | Bell Canada | |
| 905-983 | Orono, ON | Bell Canada | |
| 905-984 | Saint Catharines Thorold, ON | Bell Canada | |
| 905-985 | Port Perry, ON | Bell Canada | |
| 905-986 | Blackstock, ON | Bell Canada | |
| 905-987 | Newcastle, ON | Bell Canada | |
| 905-988 | Saint Catharines Thorold, ON | Bell Canada | |
| 905-989 | Keswick, ON | Bell Canada | |
| 905-990 | Port Credit, ON | Rogers Communications Partnership (cable) |
There are 770 prefixes, In the code area, the major cities are Stouffville, ON;Fisherville, ON;Richmond Hill, ON;. The major city is Stouffville.