Geographic Regions and Area Codes in Area Code 354

Area code 354 is a relatively new addition to the telephonic network in Quebec, Canada. It serves as an overlay to the existing 450 and 579 area codes, encompassing the off-island suburbs of Montreal and the Montérégie region. This area extends southward to the border with New York state and includes several cities such as:

  • Laval
  • Longueuil
  • Terrebonne
  • Saint-Jean-sur-Richelieu
  • Brossard
  • Repentigny
  • Saint-Jérôme
  • Granby
  • Blainville
  • Saint-Hyacinthe

These regions are part of the overlay complex that includes area codes 450 and 579. The area code 354 was formally assigned on October 22, 2022, and has been in service since then.