AI Receptionist with
425 Area Code
for Bellevue Businesses

Area code 425 serves Washington's Seattle Eastside region including Bellevue and Redmond. Created in 1997 from a split of area code 206, it covers the northern and eastern suburbs of Seattle in the Pacific Time Zone.

The 425 area code has a rich telecommunications history rooted in Washington's rapid growth. When area code 206 was established in 1947, it served the entire Puget Sound region from Seattle to the surrounding communities. For fifty years, the 206 code was synonymous with the Seattle metropolitan area. However, by the mid-1990s, explosive population growth and the proliferation of cell phones, pagers, and fax machines created an urgent need for additional phone numbers. On April 27, 1997, the North American Numbering Plan Administration implemented a three-way split that created area codes 425 and 253. The 425 code specifically served the Eastside communities—the affluent suburbs east of Lake Washington including Bellevue, Redmond, and Kirkland. This region had transformed from bedroom communities into major employment centers, particularly with Microsoft's headquarters in Redmond and growing tech companies in Bellevue. The split allowed the region to accommodate continued growth while maintaining geographic logic. In 2021, the 564 overlay code was introduced to provide additional numbering capacity across western Washington, including the 425 region, ensuring sufficient phone numbers for future growth.