You can if you have an Androide cell phone. The App is called "tcallBlocking". There is a free version in which you can block up to 3 ph. numbers and then a full version that costs $2.00, allowing you to block unlimited numbers. I just bought the full version to use the wild card. By using the wildcard, you can block an entire area code by entering <206*>.
I have been getting the same calls from various different "206" area code numbers, so I found this App and it has been working for me.
I received two calls from this number and did not pick up either time. The call did not go to voicemail, either, suggesting it is an automated dialer at work. Another ho hum "mike foxtrotter."
Here is the link to their website to remove your number. I just put mine and dpouse's in since we've been getting calls. Maybe it will work. Good luck everyone.
I too received a call from this number just now. I get 2-3 calls from this area code daily. I know absolutely no one in Washington State. I never answer, but I have called back and got the same response that the number I called is unavailable.