Area Code Overlay

​A new area code is coming for western Washington.

The new area code, 564, will be available as numbers in the 360, 206, 253, and 425 area codes become exhausted.

Part of this roll out includes the implementation of mandatory 10-digit dialing for all western Washington area codes by July 29, 2017. This will require callers to dial all 10 digits of a telephone number, including area code, when making local calls. 

A 6-month grace period begins Jan. 28 to give consumers time to adjust to dialing the area code when making a local call. During this period, local calls can be made with either 7 or 10 digits.

The price of a call, coverage area, or other rates and services will not change due to the overlay.

The 564 area code will be distributed starting in the August 2017 for new numbers in the 360 area code. 

Important safety and security equipment, such as medical alert devices, and alarm and security systems must be programmed to use 10-digit dialing. Many systems operate on 10-digit dialing by default but some older equipment may still use 7 digits. Consumers should contact their medical alert or security provider if they are not sure whether their equipment needs to be reprogrammed to accommodate the upcoming change to 10-digit local dialing. Any needed reprogramming of alarm and home security equipment should be done between Jan. 27, 2017 and July 28, 2017. 


More Information

For more information on the new area code and mandatory 10-digit dialing, contact the Consumer Protection Help Line at 1-888-333-WUTC (9882) or email  

Members of the media should contact the UTC Media Line at (360) 664-1116 or