Keep getting calls from this number too, searched the area code which means its from the San Antonio area of Texas. I have caller id, so I searched RC (which is the name that comes up when they call) plus San Antonio and found this website:
http://www.rc-co.com/index2.html

On google they said it was an advertising agency, but why they are calling me in Boston from Texas I don't know. Hope this helps!

I keep getting calls and nobody is there when I answer.

Keep getting calls, sometimes several a day. I've been getting calls from several different telemarketers since we bought a new car from GM. Some people have said this is because we signed up for the 6 month trial for On-Star. Not a happy camper in Boston!!!

Received numerous calls from this number.  No message left.   I have sent an email to the marketing company requesting that they remove me from their calling list.  Let's see if that works.  I also am in Boston.