Who called from 6175916226

Repeated calls; no real person at other end; also tried to interrupt while I was answering another call.  These people are persistent and will call several times during day and into evening.

I get a call about three to four times a day from this number or something very similar. No one is on the other end.

Sounds like a recording trying to kick on but never does. I think it may be a political call.
Calls at least twice a day for the last week.