Just got this call, and I am in the 630 chicago area code. This number (or at least ones like it from WA) generally call me every week or 2. I never pick up random numbers, and they never leave a VM so must not be important.
It's annoying but I just instantly ignore it and move on.
Technically i think you can sue them for leaving a message since it's automated in small claims court. Don't know for sure but heard about some guy doing it and winning 5k