About Area Code 343
- Region Code
- 343
- City
- Ottawa
- State
- Ontario
- Population
- 1,886,000
- Largest City
- Ottawa
- Time Zone
- Eastern Time
Area Code 343 — Ottawa, Ontario
Build trust, look local, and grow your business with a phone number in area code 343. Instant activation, flexible forwarding, and clear pricing.
Choose from popular and easy-to-remember local numbers. Instant purchase and activation.
Serving Ottawa and much of eastern Ontario, area code 343 was introduced as an overlay to legacy 613 on May 22, 2010, bringing mandatory 10‑digit dialing to the region. Numbering relief planning later added 753 in 2022. The overlay spans communities from Kingston and Belleville to Cornwall, Brockville, and the Ottawa Valley, preserving existing numbers while expanding capacity.
As the national capital, Ottawa’s telephony footprint reflects a bilingual (English–French) workforce and heavy federal presence, alongside a prominent technology cluster centered in Kanata that earned the moniker “Silicon Valley North.” Cross‑river integration with Gatineau links Ontario’s 613/343 complex with Quebec’s 819/873, and seasonal festivals like Winterlude and the Canadian Tulip Festival underscore a strong civic identity. Heritage infrastructure such as the Rideau Canal, a UNESCO site, and major universities contribute to research intensity and stable demand from government, defense, and knowledge‑based employers.