Area Code 343
Area code 343 covers Ottawa and nearby cities including Kingston, Cornwall, Belleville in Ontario, in the Eastern Time.
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 | August 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 and nearby cities including Kingston, Cornwall, Belleville in Ontario, in the Eastern Time.
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 August 2, 2026. Refreshed monthly.