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# The 206 Area Code

The 206 area code is one of the original North American Numbering Plan (NANP) area codes, established in 1947 when the comprehensive telephone numbering system was first implemented across North America. This area code covers the Seattle metropolitan area in Washington state, including Seattle, Tacoma, and surrounding communities. The 206 area code became iconic as the region's primary telephone identifier for decades, serving as the sole area code for western Washington until population growth and increased telephone usage necessitated additional codes in the region.

The North American Numbering Plan is a standardized system that organizes telephone numbers across the United States, Canada, and several Caribbean nations. Area codes, the first three digits of a ten-digit phone number, are geographically assigned to specific regions and are administered by the North American Numbering Plan Administration (NANPA). As regions grow and exhaust available phone numbers, additional area codes are introduced through a process called "area code splitting" or "overlay." In Washington state, this led to the creation of overlay area code 425 in 1995 and later 564 in 2011, which share the same geographic territory as 206. This system ensures efficient telephone number allocation while maintaining geographic organization for routing calls through the telecommunications network.