Who called from 3217409999

Can't stand these calls!!! Why can't we get them to stop?? Is there away to block them since DNC does not work?

Got a call from 321-740-9999 yesterday.  After I said hello, no voice, just a click and disconnect.  I don't like getting calls like this.  Are they just checking to see if this is a working number or are they checking to see if someone is at home...  The National Do Not Call Registry seems to do no good.  I still get these calls and when someone is on the line and I advise them I am registered, they hang up without providing any of the required information the NDNCR requires them to provide.

Caller ID shows:  V07052153490030

July 7, 2012
Saturday
Call received from 321-740-9999 at 12:29 p.m. Did not recognize number so did not answer. No message left. Caller I.D. showed: VO7071229130035

This number called yesterday. Name not known in the caller ID and left no message.

Got SAME call TODAY.