Got one call from that number at 7:59 pm July 23 2015. I have a quick disconnect on the phone which I use when I see "Unknown" and a long distance #. It seems to work most of the time as it appears that my number is nonfunctional?
They called back at 8:15 pm, so I disconnected again. It seems more and more sources are using "Unknown" so I usually just disconnect. Especially when they call in the evening, you just know they are up to no good.