Area Code 289
Area code 289 covers Hamilton and nearby cities including Oakville, Oshawa, St Catharines-Thorold in Ontario, in the Eastern Time.
Is a call from 289 a scam? Who called me from 289?
Cities in area code 289
Hamilton, Oakville, Oshawa, St Catharines-Thorold, Brampton, Ajax-Pickering, Burlington, Newmarket, Richmond Hill, Cooksville, Streetsville, Markham
Area codes by city
Carriers in area code 289
Area code 289 spans 772 prefixes, about 25% wireless. Top carriers: ROGERS COMMUNICATIONS CANADA INC., TELUS INTEGRATED COMMUNICATIONS, FIBERNETICS CORPORATION, IRISTEL INC. - ON. Look up the carrier for a 289 number.
Other Ontario area codes
- 226 — London
- 249 — Sudbury
- 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
Nearby area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.