Geographic Regions and Area Codes

Area code 365 serves a significant region in Southern Ontario, Canada. This area code covers cities such as Hamilton, St. Catharines, and Niagara Falls. It is part of the Golden Horseshoe region that surrounds Lake Ontario, excluding the City of Toronto. The 365 area code is part of an overlay numbering plan that includes area codes 905, 289, and 742. This overlay covers the same geographic region, which is primarily suburban and surrounds the City of Toronto.

Key regions within the 365 area code include:

  • Hamilton
  • St. Catharines
  • Niagara Falls
  • Burlington
  • Grimsby