Phone FAQs

What's the Washington 564 area code overlay?


To ensure a continuing supply of telephone numbers, the new 564 area code has been added to the regions of Washington served by area codes 360, 206, 253, and 425. This is known as an area code overlay, and it'll require you to change the way you enter telephone numbers when making a call.

Washington area code boundaries and area code assignments

For additional information, contact us or refer to the customer letter below:

Washington 564 Area Code Overlay Customer Letter