The 206 area code, an integral part of Washington's telecommunication landscape, has a rich history and continues to play a vital role in the region. Here are three key facts about the 206 area code:

Historical Significance: The 206 area code was one of the original area codes established in North America in 1947. Initially, it served the entire state of Washington, highlighting its importance in the early days of telephone communication in the region.

Geographical Coverage: Over the years, the coverage area of the 206 area code has been reduced due to the introduction of new area codes to accommodate growing telecommunication needs. After several splits, the most significant being in 1957 with the introduction of area code 509, the 206 area code now primarily covers the Seattle suburbs. This change reflects the evolving nature of area code allocation as population and technology have advanced.

Introduction of Overlay Area Code and Ten-Digit Dialing: Reflecting the continuous growth in telecommunication needs, the 206 area code received an overlay area code, 564, in 2017. This addition meant that ten-digit dialing became mandatory in the region from July 29, 2017, a significant shift from the traditional seven-digit dialing, marking a new era in the area's telecommunication infrastructure.

These facts collectively provide a snapshot of the 206 area code's journey from being a state-wide code to its current role serving the Seattle suburbs, adapting to the growing and changing demands of telecommunication in Washington.