I received a call from this number, and they stated they reviewed my information on careerbuilder and then proceeded in asking me questions like, "what kind of position are you looking for?" "What would you like to do?" I then stated it would depend on what was being offered, and I then asked what company was he representing and he rushed off the phone and hung up. Seems like it was some kind of scam.
Thank you all for saving me the trouble of calling him back. The vague voicemail (no company/recruiting agency mentioned) was a red flag. A quick Google search leading to this site confirmed it. Looks like a pyramid scheme.
I just got a call from this company. He said that he found my resume on Career Builder as well. He asked me what my current situation was and why I am looking for a position. How dumb is that.