Area Code 343
Area code 343 covers Ottawa and nearby cities including Kingston, Cornwall, Belleville in Ontario, in the Eastern Time.
Is a call from 343 a scam? Who called me from 343?
Cities in area code 343
Ottawa, Kingston, Cornwall, Belleville, Brockville, Bancroft, Kanata-Stittsville, Jockvale, Merrickville, Carleton Place, Smiths Falls, Hawkesbury
Area codes by city
Carriers in area code 343
Area code 343 spans 640 prefixes, about 14% wireless. Top carriers: FIBERNETICS CORPORATION, TELUS INTEGRATED COMMUNICATIONS, DISTRIBUTEL COMMUNICATIONS LIMITED - ON, IRISTEL INC. - ON. Look up the carrier for a 343 number.
Other Ontario area codes
- 226 — London
- 249 — Sudbury
- 289 — Hamilton
- 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.