I've received a couple of calls from this number. I've not answered them, and they left no message. I learned, however, that the owner of the number is Ymax. My research included this link:
https://cryptome.org/isp-spy/magicjack-spy.pdf
This company appears to sell "magic jack" devices which, for one thing, if connected to a PC's usb - allows the user to hijack the person's phone number for calls. I don't know if that helps - but there you go.