Who called from 6474959013

Buy a Panasonic cordless phone. New model can block up to 250 numbers. No monthly subscription fee.
Or go to "Amazon" or any electronic stores, search for a blocking device. Some device can block up to 1500 numbers. No way you can be off their list once you are on, even if they are not calling your number, they will sell it to other telemarketer. That's my suggestion to you.

I received tens of calls from this number  leaving no messages.

Sometimes I open the line without speaking to see who will be in the other line. There is no respond they hang the line.

U have to do something after all these complaints.

It is big headache.

from "windows"

got called today, left no message

Oooopppsss We missed your call.  Your call is very important! Call again and our answering machine will be more than happy to take your call.