Got a call today. Didn't answer, they didnt leave a message.

called several times last few days.......1st time was selling car insurance.....told him I was on DNC list...he hung up. Same number has called twice since then but no one talks if the call is answered. I am going to block the number today.

Constant harassing calls several times a day. Very rude and threatening! I asked him to stop calling and he kept saying I'm going to keep calling you ever day!

He is not a telemarketer, but an annoying jerk with a cellphone. I tried reporting him to his carrier "AT&T MOBILITY" to no avail. So I reported him and "AT& T MOBILITY" here :https://www.ftccomplaintassistant.gov/Information#crnt
Doubt it will help, but adding yourself to a donotcall list wont stop this guy, he is a private customer, not a telemarketer or business. AT&T MOBILITY claims if everyone files a complaint with the federal trade commission, they can refuse him service and take action against him. We will see. So go file your complaint and handle this douche. Five minutes...

Multiple calls a day for the past month or so from this number. Never leave a message and when I answer, nobody speaks at all then a few seconds later it hangs up.