Who called from 4152996151

This number keeps calling my phone and no one answers when I say hello. So unprofessional and a few other chose words I will not mention here!!! There is no name, just Unknown Name

number keeps calling my phone and no one answers when I say hello.  I'm blocking. #

Same here, no message.  May be political.

Selling medical alert equipment. Must be calling from VOIP line where there is a huge delay. Blocked number.

When I called back that number its a Medical Alert System.