WHAT YOU NEED TO KNOW
Area code 206 serves Seattle and surrounding communities in King County, Washington, including Bellevue, Renton, and Kirkland. Established in 1947 as one of the original NANP codes, it covers approximately 2 million residents and remains the primary local code for the greater Seattle metro area.
- Population: ~2.0 million residents in the Seattle metro core
- Overlay: Overlay: 564 (added 2018)
- Dialing: 10-digit dialing required
- Source Type: Local geographic code
Geographic Coverage
Area code 206 covers the western portion of King County, Washington. It encompasses the city of Seattle and a cluster of surrounding cities including Bellevue, Renton, Kirkland, Redmond, Mercer Island, Burien, SeaTac, Tukwila, Shoreline, and several smaller communities. The coverage area is largely bounded by Puget Sound to the west and Lake Washington to the east, forming the dense urban and suburban core of the Seattle metropolitan region.
Population and Business Context
The 206 area code serves one of the fastest-growing metro economies in the United States. Seattle is home to major corporations including Amazon, Boeing, and Microsoft, and supports a large technology, aerospace, healthcare, and maritime industry base. Redmond serves as Microsoft's headquarters, while Bellevue has grown into a secondary business hub. The area's economy draws a highly educated workforce and supports a dense concentration of small and mid-sized businesses alongside global enterprises.
Area Code History
Area code 206 was assigned in 1947 as one of the original 86 numbering plan areas created under the North American Numbering Plan. At that time, a single code covered the entire state of Washington. As the population grew, Washington was split into additional area codes. Area code 253 was created in 1995 to serve the Tacoma area, and 425 was added in 1995 for the Eastside suburbs, reducing 206 to its current Seattle-focused footprint.
How to Dial
Callers within the 206 area must use 10-digit dialing, meaning the area code is required even for local calls. This requirement was introduced when the 564 overlay was added in 2018, bringing a second set of available numbers to the same geographic region. For calls from outside the area, you dial 1 followed by the 10-digit number. The 206 and 564 codes share the same geographic footprint and are considered overlapping codes.
Need a 206 Number for Your Seattle Business?
Businesses operating in Seattle and the broader King County market can use a 206 tracking number to establish a local presence and measure call performance. Convirza provisions trackable local numbers in any North American area code, including 206, with no hardware required and fast setup. Every call to your 206 number gets scored, recorded, and attributed to the marketing source that drove it - using dynamic number insertion (DNI) across paid search, organic, social, and offline channels. Calls route to any team member, location, or device, and full conversation analytics are available from day one.
750+ customers · 25 years of call data