did not answer, just keeps calling.

Answered and the person said they were from a construction company and they were doing estimates in my area.  I then informed her that I was on the national do not call registry and that I will be filing a complaint.  She then said that she had never heard of the registry and ask me what it was/

Answered  and the person was looking for my father and said he worked with him and that his name (not my father's) was jerry.... he said he'd call again later... I called my father and gave him the number to call (see if he knew the number) and it was of no one he knew.

this number calls my home phone(which is on the do not call list, for years) and whenn we answer the phone there is no one on the other side and then hangs up.

They called and hung up. When I called back they answered, but didn't say anything. Then just hung up. When calling after hours it just rings.