Area Code 343

Area Code 343 History:

05/17/2010
Area code 343 was officially put into service. Area code 343 is an overlay of area code 613. Ten digit dialing is mandatory in area code 343.

Area code 753 was put into service as an all services overlay covering the two existing area code overlays (343 and 613) on 03/26/2022. Ten digit dialing is necessary in the 343/613/753 overlay because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code. Ten digit dialing (area code + seven digit number) is necessary when two or more area codes cover the same geographic area.

Major cities or places in Ontario within area 343 include:

Area codes 613, 343 and 753 cover eastern Ontario and the Ottawa area, including the larger communities of Bancroft, Belleville, Brockville, Carleton Place, Cornwall, Kingston, Pembroke, Perth, Smith Falls and Trenton, plus many smaller communities in eastern Ontario.