Ontario area codes
Ontario has 19 area codes: 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 683, 705, 742, 753, 807, 905, 942.
- 226 — London
- 249 — Sudbury
- 289 — Hamilton
- 343 — Ottawa
- 365 — Markham
- 382 — London
- 416 — Toronto
- 437 — Toronto
- 519 — London
- 548 — London
- 613 — Ottawa
- 647 — Toronto
- 683 — Lindsay
- 705 — Barrie
- 742 — Brampton
- 753 — Ottawa
- 807 — Thunder Bay
- 905 — Hamilton
- 942 — Toronto
Area codes by city in Ontario
- Toronto area codes
- Ottawa area codes
- Brampton area codes
- Hamilton area codes
- London area codes
- Thunder Bay area codes
- Kingston area codes
- Windsor area codes
- Kitchener area codes
- Barrie area codes
- Guelph area codes
- Oshawa area codes
- Sudbury area codes
- Oakville area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.