Area Code 343
Area code 343 covers Ottawa, Ontario (Eastern Time) and nearby Kingston, Cornwall and Belleville; overlays 613 and 753 share the same area.
Area code 343 quick facts
| Location | Ottawa, Ontario |
|---|---|
| Time zone | Eastern Time |
| In service | 2010-05-17 |
| Overlay codes | 613, 753 |
| Nearby codes | 753, 613, 263, 438, 315, 680 |
| Carrier coverage | 640 prefixes; 14% wireless |
| Data current as of | November 2, 2026 |
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 and line type 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
Frequently asked questions
Where is area code 343?
Area code 343 covers Ottawa, Ontario (Eastern Time) and nearby Kingston, Cornwall and Belleville; overlays 613 and 753 share the same area.
What cities use area code 343?
Area code 343 serves Ottawa, Kingston, Cornwall, Belleville, Brockville, and 7 other communities in Ontario.
What time zone is area code 343 in?
Area code 343 is in the Eastern Time (America/Toronto).
How do you dial a 343 number?
Dial all 10 digits: 343 followed by the 7-digit local number. From abroad, dial +1 343 and the local number.
Is a call from area code 343 a scam?
A 343 number is geographically tied to Ontario, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.
Is 343 a country code?
No. 343 is a Canadian area code (a domestic 3-digit code), not a country code. The country (calling) code for Canada is +1, shared across the North American Numbering Plan. So a full 343 number written for international dialing looks like +1 343 followed by the 7-digit local number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of November 2, 2026. Refreshed monthly.