Thank you for saying this. This is the second time in two days I've had a call where they let it ring once and hang up. Just yesterday a call with a number stating from Montana called and let it quickly ring once, mid-ring hung up. I refer to this site and it helps. My number is on the donotcall.gov registry and these telemarketers/scammers are still able to get our numbers! This is another one I have to block.
calls and hangs up calls right back saying they want to up my credit card I don't have their credit card then they call and said they were from the IRS this is just getting out of hand