Only ph number on caller ID. When answered, silence then click.

I got a call from this number.  The caller wouldnt tell me who he was.  He knew a bunch of info about my house and then asked if I wanted to do business with his company.  When I said no he became very rude and upset.

call. hangup on answer

Way too many calls... was getting several a day and then nothing and had another one today.  Most times I don't answer and they don't leave a message.  I did answer once and they knew my name but then disconnected.  Once I think they said they were with a mortgage company but then  also was disconnected.  Get nothing when I call back.   This is very annoying.  Any idea how to get it to stop?

Number only caller id - silence then hang up