This is Van Ru Credit, a notorious company that buys old bad debt and debt from the US D3pt. of Education. This appears to be a new number they are using, as none of the searches I tried came up with anything at all. I called the number back (with a spoofed number, just in case) and the message I got was "thank you for calling Van Ru... click" as I hung up.
Van Ru is a bloodsucking, relentless, mean spirited company with no soul. I'd rather live on the lam than give them a dime. Suck it.