Who called from 3176645931

Did not answer, did not leave a message.

Credit card rate reduction scam. Again.

I was waiting for a call and answered the 'phone.  A voice begins "We have been monitoring your credit card for the last 5 months..."  I will mark this number as fraud and never answer unless I see the identity of a known caller.  How can we change the use of the human voice for good instead of evil?

Call received, number was displayed as "Indianapolis, IN". Did not answer, and no message was left. Have blocked the number.