This is (currently) a number carried scammers' favorite service, Peerless Network. You can report the number to peerless at this URL: http://www.peerlessnetwork.com/contact-us/do-not-call-lists/
Called, but did not leave a message. When I called back, all it said was "If you'd like to be on a do not call list please press 1", and when I kept doing that, nothing happened.