I just received a call from this number. We are a business. Weird part is there was no one on the other line. It came up on our caller id as L7_Scvc Call. Looked it up and it shows up as another number 262-672-4859.
L7-Scvc Call seems to refer to the carrier, not the caller. You see it when you get called by a customer of Layer 7 Hosted VOIP Services (based in San Diego) and they have not bothered to set their own Caller Id information.
They seem to be used by many spammers (or perhaps one robo-dialer with many different spoofed caller-id numbers)
See http://www.l7now.com/hosted-voip.html for details of the carrier. If we all complain to them maybe they will fix their system to make it harder for spammers to spoof caller id number.