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area code

Biggest city:





Eastern (GMT -5)

Nearby area codes: 

Zip codes

K1A 0A1

K1P 6E6

Major Cities:

Ottawa, Bancroft, Belleville, Brockville, Carleton Place, Cornwall, Kingston, Pembroke, Perth, Smith Falls, Trenton


Average Income:





Unemployment Rate:

The 343 area code is a vital part of Ontario's telecommunications landscape in Canada, particularly serving the eastern part of the province. Introduction as an Overlay: The 343 area code was introduced as an overlay to the existing 613 area code. This implementation, effective on May 17, 2010, was designed to provide additional numbering resources due to the high demand for telephone numbers in eastern Ontario. The overlay approach allowed existing 613 subscribers to keep their phone numbers, while new numbers could be assigned the 343 area code. Geographical Coverage: The 343 area code, along with the 613 area code, covers a significant portion of eastern Ontario, including cities like Ottawa (the national capital of Canada), Kingston, and Belleville, as well as many smaller communities. The area represents a mix of urban and rural landscapes, reflecting the diverse demographic and economic composition of the region. Adoption of Ten-Digit Dialing: With the introduction of the 343 overlay, ten-digit dialing (area code + phone number) became mandatory for all local calls within the 613 and 343 area codes. This requirement, aligning with the standard practice in regions with overlay area codes across Canada, was essential to manage the growing number of phone users and the consequent need for more telephone numbers in the region. These facts about the 343 area code highlight its important role in supporting the telecommunications needs of eastern Ontario. By providing additional numbering capacity and facilitating the transition to ten-digit dialing, the 343 area code ensures that the region's communication infrastructure can keep pace with its growth and evolving needs.
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