425 Area Code: Bellevue & the Eastside Tech Corridor

425 split from 206 in 1997 to serve the rapidly growing tech corridor east of Seattle.

History & Coverage

425 spans Bellevue, Redmond, Kirkland, and the Eastside communities across Lake Washington from Seattle.

Why Businesses Choose 425

• Microsoft headquarters prestige: Microsoft's Redmond campus anchors one of the world's most important tech clusters
• Corporate headquarters density: Bellevue hosts a growing number of corporate offices, including T-Mobile's headquarters
• High-income, tech-driven market: the Eastside consistently ranks among the wealthiest and most educated regions in the US

Key Industries & Neighborhoods

Redmond anchors Microsoft and software development, while Bellevue supports corporate headquarters, finance, and luxury retail.

Fun Facts

• Microsoft's Redmond campus spans over 500 acres and employs tens of thousands
• Bellevue has grown into Washington's fourth-largest city, driven largely by tech growth

Conclusion

For tech, software, and corporate businesses, 425 places you directly within Seattle's most important technology corridor.