The new year will also bring a new area code to Western Washington. T-Mobile began warning its customers in area codes 360, 425, 253 and 206 about the addition of area code 564. The 564 will be an ...

Get ready to see more 564s in Washington. T-Mobile is notifying customers that the new area code will be rolling out in Western Washington state starting July 29. The new area code was approved in ...