Area code 343: where it is and who calls from it
Area code 343 is in Ontario (Canada).
Ontario (Ottawa metropolitan area and southeastern Ontario)
| Where | Ontario |
|---|---|
| Time zone | Eastern Time ยท local time |
| In service since | 2010 |
| Overlay | Yes, with 613, 753 |
Overlay: 343 covers the same area as 613, 753. Overlay areas use 10-digit dialing, so a seven-digit number alone won't connect, and neighbors can have different area codes.
Canada's numbering administrator doesn't publish prefix assignments, so for Canadian numbers we can tell you the area code's region and time zone, but not the rate center or original carrier.
Other area codes in Ontario
226 249 289 365 382 416 437 519 548 613 647 683 705 742 753 807 905 942
Got a call from 343?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 343 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.