When will the Washington 564 area code overlay calling change begin?
Beginning January 28, 2017, you should begin using the new dialing procedures whenever you place a call from the 360, 206, 253, and 425 area codes. If you forget and dial just seven digits, your call will still be completed.
Beginning July 29, 2017, you must use the new dialing procedures, as described above for all calls. After this date, if you don't use the new dialing procedures, your calls will not be completed, and a recording will instruct you to hang up and dial again.
Beginning August 28, 2017, new telephone lines or services may be assigned numbers using the new 564 area code.