Caller abandoned at four rings, before man or machine could respond, so we have no intel. The other mystery call sites have nothing. Now to speculate:

The ring count is barely legal for a telemarketer. However, the exchange is not compliant with the North American Numbering Plan. This I guarantee will turn out to be for something illegal or fraudulent. At a wild guess, it's a fake PC tech. They seem to like obviously fake numbers the most.