Who called from 7155753798

Got a call at dinner time on Sunday. Beside the number, all it said on the ID was SSI. No message left.

Have received calls from this number for the last 3 days. Caller ID says SSI. When answered there is no response.

1-715-575-3798
Have gotten calls from this number for about 3 days in a row. When answering it there is no response or any message. A reverse number search shows the owner of this number as :  
-----> Bandwidth.com VoIP in Wisconsin Rapids, WI

caller Id comes up Stevens Point no message

I have had calls from this number since last week, usually late afternoon. I have now labeled it Spam Caller in my phone. Today they hung up when I answered with my name and business name. Most of the time, I didn't answer and they didn't leave a message.