Area code 604

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Area code 604 is a telephone area code in the North American Numbering Plan for the southwestern corner of British Columbia, Canada. The numbering plan area comprises Metro Vancouver, the Sunshine Coast, Howe Sound / Sea-to-Sky Corridor, Fraser Valley, and the lower Fraser Canyon regions. The area code is one of the nine original North American area codes assigned to Canada in 1947. The numbering plan area is also served by area codes 236, 257, 672, and 778 in an overlay complex that extends to the entire province. Area code 604 is one of the original 86 area codes assigned in 1947 in the contiguous United States and Canada. It designated the province of British Columbia. 604 also served Point Roberts, Washington, a pene-enclave of the United States until 1968, when the area was reassigned to area code 206; since 1995, it is served by area code 360. Despite British Columbia's growth in the second half of the 20th century, 604 remained the province's sole area code for nearly 50 years. By the mid-1990s, however, the need for a new area code in the province arose from rapid expansion of telecommunication services for cell phones and pagers. The number shortage was particularly severe in the Lower Mainland, which was home to most of the province's landlines and most of its other telecommunications devices requiring telephone numbers.