Where is Area Code 343?
Area code 343 is published for Distributed overlay for Eastern Ontario in Canada.
It should be interpreted as a numbering-plan association, not a live geolocation result.
🇨🇦 Canada geographic code
343 Area Code in Canada
Distributed overlay for Eastern Ontario. This guide separates the geographic code or numbering range from country calling code +1 and explains domestic and international formats.
International prefix+1 343
Domestic: 343Geographic NANP overlay code
Quick facts
343 Area Code Overview
CountryCanada
Country code+1
Domestic area code343
Code typeGeographic NANP overlay code
Overlay Area Codes
Eastern Ontario overlay complex 343, 613 and 753.
Coverage visualization
Area Code 343 Map
This schematic summarizes the published numbering association without inventing precise geographic boundaries.
343 · Canada
Distributed overlay for Eastern Ontario
What Time Zone is Area Code 343?
Canada spans Newfoundland, Atlantic, Eastern, Central, Mountain and Pacific time zones, with regional exceptions
America/Toronto: Calculated in your browser
Where a code spans several zones, confirm the destination city before calling.
History
The North American Numbering Plan was developed in 1947, when Canada received nine original area codes. New Canadian area codes were historically introduced through regional splits, but modern relief planning uses distributed overlays. An overlay adds another area code to the same territory without changing existing numbers.
Eastern Ontario overlay complex 343, 613 and 753.
Nearby Area Codes
“Nearby” means related entries in this country directory, not a guarantee of a shared physical border.
Canada
905 Area Code
Southern Ontario around Toronto, including the Golden Horseshoe
Canada289 Area Code
Distributed overlay for the 905 Southern Ontario region
Canada519 Area Code
Southwestern Ontario
Canada418 Area Code
Eastern and northeastern Québec
Canada450 Area Code
Communities surrounding Montréal, including Laval, Montérégie, Laurentides and Lanaudière
Canada819 Area Code
Western and northern Québec
Top 5 Counties or Regions in Area Code 343
Administrative units and telephone zones are different entity types; the list reflects featured city associations only.
Top 50 Cities in Area Code 343
- Ottawa — Ontario
The directory includes verified or clearly qualified city associations and does not claim exhaustive coverage.
Network interpretation
Largest Telephone Carriers
Current operator and market-share data are dynamic. This page avoids assigning a specific number to a carrier from its area code alone.
Landline
Area code 343 is presented as geographic nanp overlay code. Consult Canadian Radio-television and Telecommunications Commission (CRTC) for current allocation or licensing information.
Wireless
Wireless numbers commonly use separate ranges. Number portability prevents reliable current-carrier identification from a prefix alone.
Prefixes
+1+343+subscriber number
Domestic code: 343
International prefix: +1 343
Search by City:
- Ottawa — Ontario
By Number:
A number beginning +1 343 matches this numbering pattern. Keep the remaining subscriber digits intact. This directory does not perform reverse lookup or identify a private subscriber.
Listings by Region or State
More Information
Common questions
343 Area Code FAQ
Where is area code 343?
343 is published for Distributed overlay for Eastern Ontario in Canada.
How do I call area code 343 from abroad?
Use +1 343 followed by the subscriber number; remove the domestic trunk prefix where applicable.
Does area code 343 identify the current caller location?
No. It describes a numbering-plan association, while portability, forwarding and internet calling can separate a number from the caller’s current location.