Fantastic.  I'm going to check that out.  I have been using a less high tech method.  I have an old referee's whistle. Get someone on the line then give a loud blast on the whistle.  Listen while they scream!  It provides a great feeling of joy and fulfillment.

I always know these long weird numbers are not from anyone I know.They are telemarketers,scammers,and the like.I never answer calls that aren't from people,I know,but,my phone takes messages and I will always pick up,if its legit and worth my while,otherwise,get lost....

kept calling, even after told them to stop....PITA  thankfully our phone has caller block

Went to the "Instaflex" web site. Free 14 day offer. Left site as soon as it became apparent that they required a credit card. Received the first call from this number about ten minutes later. Won't share your information, what a load of BULL.

They have been calling for 5 days in a row ( same time ) If I do answer they don"t talk.. Grrrrrr  So annoying.. I am also on the Dont Call List... ( doesn"t seem to help :(   )

This number has called THREE TIMES.  Even after selecting the choice to be removed from their list, they KEEP CALLING.  I want to reach down the phone line and... well, you know....this is some scammer trying to scare old folks into giving up their personal information, and ultimately their money.  For that reason alone, they deserve to be dealt with severely.  This number needs to be shut down immediately for abuse.