<P> Area code 604 is a telephone area code that serves southwestern British Columbia: the Lower Mainland, Sunshine Coast, Howe Sound / Sea to Sky Corridor, Fraser Valley and the lower Fraser Canyon regions . It primarily serves the city of Vancouver and surrounding regions . </P> <P> 604 is one of the original 86 area codes assigned in 1947 in the contiguous United States and the then - nine provinces of Canada . It originally served the entire province until a geographic split was implemented in 1997, creating the new area code 250 for the remainder of the province . Until 1988, area code 604 also included Point Roberts, Washington, a pene - enclave of the United States; Point Roberts was transferred in 1988 to 206 and is now served by area code 360 . </P>

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