Ontario Area Codes
The province of Ontario, Canada is currently served by a total of 19 area codes:
Overlaying area codes
These Ontario area codes overlay (cover the same geographic area). The first code listed is the parent code. Overlay area codes are added when no more phone numbers are available in an existing Numbering Plan Area.
- 416/647/437/942
- 519/226/548/382
- 613/343/753
- 705/249/683
- 905/289/365/742
Larger Ontario cities and their area codes
| City | Area Codes |
|---|---|
| Ajax | 905, 289, 365, 742 |
| Aurora | 905, 289, 365, 742 |
| Barrie | 705, 249, 683 |
| Belleville | 613, 343, 753 |
| Brampton | 905, 289, 365, 742 |
| Brantford | 519, 226, 548, 382 |
| Burlington | 905, 289, 365, 742 |
| Caledon | 905, 289, 365, 742 |
| Cambridge | 519, 226, 548, 382 |
| Cornwall | 613, 343, 753 |
| Guelph | 519, 226, 548, 382 |
| Haldimand County | 905, 289, 365, 742 |
| Hamilton | 905, 289, 365, 742 |
| Innisfil | 905, 289, 365, 742 |
| Kingston | 613, 343, 753 |
| Kitchener | 519, 226, 548, 382 |
| Leamington | 519, 226, 548, 382 |
| London | 519, 226, 548, 382 |
| Milton | 905, 289, 365, 742 |
| Mississauga | 905, 289, 365, 742 |
| Newmarket | 905, 289, 365, 742 |
| Niagara Falls | 905, 289, 365, 742 |
| Norfolk County | 519, 226, 548, 382 |
| North Bay | 705, 249, 683 |
| Oakville | 905, 289, 365, 742 |
| Orillia | 705, 249, 683 |
| Oshawa | 905, 289, 365, 742 |
| Ottawa | 613, 343, 753 |
| Peterborough | 705, 249, 683 |
| Pickering | 905, 289, 365, 742 |
| Quinte West | 613, 343, 753 |
| Richmond Hill | 905, 289, 365, 742 |
| Sarnia | 519, 226, 548, 382 |
| Sault Ste Marie | 705, 249, 683 |
| St Catharines | 905, 289, 365, 742 |
| St Thomas | 519, 226, 548, 382 |
| Stratford | 519, 226, 548, 382 |
| Sudbury | 705, 249, 683 |
| Thunder Bay | 807 |
| Timmins | 705, 249, 683 |
| Toronto | 416, 647, 437, 942 |
| Vaughan | 905, 289, 365, 742 |
| Waterloo | 519, 226, 548, 382 |
| Windsor | 519, 226, 548, 382 |
| Woodstock | 519, 226, 548, 382 |