Get messages from this number as well as 425-282-5801, 5802 and 5823 generally between the hours of 4:30 and 6 p.m. No message is ever left and no one is there when I answer. I call back and the signal is busy. I've read it's some kind of research or something tied to Microsoft but I don't buy it. I think it's a scam by a group who has figured out how to read / access info on your phone by calling from these numbers. I refuse to ansewr them anymore and now pay to block the numbers from my phone.
I answered after receiving multiple calls - like 6 per day for a couple of months - they were doing a feedback interview on "My recent IRS audit." WTF?