Keep receiving call from this number shows up as University of N on caller ID, soon as machine picks up they hang up.  No message.  I do not answer calls from number I do not know.  Any one know who this is?

It is from the Public Opinion Research Lab at UNF. They conduct polls across the US.

These people continually call.  If you don't answer the phone the 1st time they call back till you pick up. Also, I hung up on one and they immediately called back.  I'm going to buy a whistle to blow their ears off next time.  I guess having a private unlisted, unpublished number means nothing.

We keep getting the calls also.  It is annoying

Calls 2-3 times a day