I am also in MA and got the same robocaller using a Washington state area code.

Also in MA, also a political robocall. Pro tip to any politicians reading this: Robocalls don't work, your consultants are lying to you!

Hang up call.  Caller ID displays 'DE SERV COM' with the above phone number.

No idea on the who or why of this hang up call.

Got call. got a message. I live in IA. It was a robocall from a local politician asking me to vote for his candidate for a particular office in tomorrow's primary election.

We just got one of these calls, too, and I sent an email to the second link provided by JD above (Washington Utilities...).  I got a really nice email back immediately and part of what the lady wrote is, "We have determined the telephone number you reported as the source of the calls is owned by Pacific Telecom Communications Group (Pacific Telecom) located in Los Angeles, California. Pacific Telecom provides telephone numbers, many of which have 206 area codes, to subscribers. However, many of the subscribers who obtain the 206 telephone numbers from Pacific Telecom are not located in Washington State. Please report these calls to the Federal Trade Commission by filing a complaint online at www.donotcall.gov/default.aspx."

So, it probably doesn't help to complain to the State of Washington.  Just so you know.  I am going to complain to the website she included though - as I've done numerous times before for all the other calls.   Ugh.