Some numbers will ring once or twice even though blocked - but mine always kicks them by the second ring. In most cases, they are stopped cold and no rings. If you have a newer blocker, try blocking the area code as some of these numbers they use repeatedly or are in the same area code..
Just turned this # 240-581-5881 into FTC
Scam artist robo call. He as Indian accent. Insists on a call back to him, that it is urgent and that it involves a US Treasury investigation of.. Y O U. Dennis Gray or something like that. Funny, it is so urgent but message does does not mention your name.... but insists Y O U call him back.... so he can help..really!