Who called from 4234054475

This number comes up as Athens, Tn on caller id. When I answered they wanted to sell my husband health insurance. I told them we had insurance and to take us off their call list. They continue to call and hang up when I answer.  I have blocked the number but they still call. The phone rings once before the block kicks in.

Didn't answer but they called three times within a 10 minute time frame which is a bit excessive & annoying. Will be blocking this number.